diff --git a/src/renderer/src/scene/study/ShelfArchive.tsx b/src/renderer/src/scene/study/ShelfArchive.tsx
index dc8296651..a6cc3b6c4 100644
--- a/src/renderer/src/scene/study/ShelfArchive.tsx
+++ b/src/renderer/src/scene/study/ShelfArchive.tsx
@@ -117,11 +117,10 @@ export function shelfLabel(
 /**
  * How thick one painted spine is, as a share of the shelf it stands on.
  *
- * A mark is a whole bay of books, but the number is pasted on ONE of them, the
- * way a library labels a volume rather than a shelf. Sized from the bay's width
- * the label would be a plate across a run of spines with a glyph taller than
- * any book on the wall; the volumes painted there are roughly a quarter as
- * thick as the shelf is tall, so that is how wide the label is.
+ * A mark is one painted spine, and the label is as wide as that spine — up to
+ * this share of its height. The volumes painted on the wall are roughly a
+ * quarter as thick as they are tall, and the cap keeps the label on the thick
+ * ones from growing into a plate with a glyph taller than any book beside it.
  */
 export const SPINE_THICKNESS = 0.25;
 
diff --git a/src/renderer/src/scene/study/shelfBooks.ts b/src/renderer/src/scene/study/shelfBooks.ts
index 064b383fd..7806a26a3 100644
--- a/src/renderer/src/scene/study/shelfBooks.ts
+++ b/src/renderer/src/scene/study/shelfBooks.ts
@@ -50,87 +50,383 @@
  * drawn: archiving darkens the painting inside one of these rectangles, and the
  * thing that stands out is paint the painter put there.
  *
- * Each rectangle is one BAY of the wall — the run of books standing between two
- * posts on one shelf, from the ledge up to the shelf above it. It used to be one
- * spine, four to a shelf and spread along it, and however much work had been
- * finished the wall read as a book lit here and there: twenty-two spines of the
- * several hundred painted, and the rest of the wall could never change. Aaron:
- * *"the whole background of books should be able to be darkened."* A bay is how
- * much of the wall one finished commission is worth if the whole wall is to
- * fill, and a filled bay is a thing the eye counts where a single darkened spine
- * among dark spines is not.
+ * Each rectangle is one painted SPINE, and one finished commission darkens
+ * exactly one of them. The wall had been cut into bays — the run of books
+ * between two posts on one shelf — so that fifty-odd marks could fill it, but a
+ * bay is a chunk of several books standing for one piece of work, and the wall
+ * could then only ever say "about this much". A spine per commission keeps both
+ * readings: a full wall is still a wall that has filled, and every darkened
+ * book on it is one thing that was finished.
  *
- * The bays stop short of the three things on the wall that are not books. A
+ * The spines stop short of the three things on the wall that are not books. A
  * lamp is what lights the wall, and a shade taken down with the books beside it
  * reads as the light going out; the ladder and the sleeping cat stand in front
- * of the shelves rather than on them. Where one of those stands in a bay, the
- * bay is cut at its edge, and a sliver too narrow to be read as books is left
- * out rather than marked.
+ * of the shelves rather than on them. A volume behind one of those is not
+ * offered at all.
  *
  * The order is the order they are handed out in — along each shelf, top shelf
  * first — which is how a wall of books fills, so the archive reads as a level.
  *
- * Read off the painting rather than authored freehand: the posts and ledges are
- * the columns and rows of that panel where the paint is shelving all the way
- * across, and the lamps are where it is lamplight.
+ * Read off the painting rather than authored freehand. Within each run of books
+ * between two posts, a spine's sides are where the colour of the paint changes
+ * from one column to the next — the painted titles are left out of that, since
+ * a glyph is an edge inside a book rather than between two — and a run too wide
+ * to be one volume is split at its strongest remaining edge. A spine's top is
+ * the first row, going down, below which the paint is that book's own colour.
+ * Every spine stands on its ledge, so the bottoms of one shelf's spines agree
+ * where their tops do not.
  */
 export const SHELF_BOOKS: readonly { x: number; y: number; w: number; h: number }[] = [
-  { x: 0.0108, y: 0.0074, w: 0.0867, h: 0.1369 },
-  { x: 0.1084, y: 0.0074, w: 0.0969, h: 0.1369 },
-  { x: 0.2353, y: 0.0074, w: 0.1582, h: 0.1369 },
-  { x: 0.4043, y: 0.0074, w: 0.0874, h: 0.1369 },
-  { x: 0.5096, y: 0.0074, w: 0.0867, h: 0.1369 },
-  { x: 0.6078, y: 0.0074, w: 0.0963, h: 0.1369 },
-  { x: 0.7156, y: 0.0074, w: 0.0893, h: 0.1369 },
-  { x: 0.8170, y: 0.0074, w: 0.0861, h: 0.1369 },
-  { x: 0.9133, y: 0.0074, w: 0.0861, h: 0.1369 },
-  { x: 0.0344, y: 0.1905, w: 0.0631, h: 0.1131 },
-  { x: 0.1084, y: 0.1905, w: 0.0867, h: 0.1131 },
-  { x: 0.2481, y: 0.1905, w: 0.1454, h: 0.1131 },
-  { x: 0.4043, y: 0.1905, w: 0.0746, h: 0.1131 },
-  { x: 0.5287, y: 0.1905, w: 0.0676, h: 0.1131 },
-  { x: 0.6078, y: 0.1905, w: 0.0708, h: 0.1131 },
-  { x: 0.7302, y: 0.1905, w: 0.0746, h: 0.1131 },
-  { x: 0.8170, y: 0.1905, w: 0.0625, h: 0.1131 },
-  { x: 0.9426, y: 0.1905, w: 0.0568, h: 0.1131 },
-  { x: 0.0344, y: 0.3557, w: 0.0631, h: 0.1086 },
-  { x: 0.1084, y: 0.3557, w: 0.0867, h: 0.1086 },
-  { x: 0.2481, y: 0.3557, w: 0.1454, h: 0.1086 },
-  { x: 0.4043, y: 0.3557, w: 0.0746, h: 0.1086 },
-  { x: 0.5287, y: 0.3557, w: 0.0676, h: 0.1086 },
-  { x: 0.6078, y: 0.3557, w: 0.0708, h: 0.1086 },
-  { x: 0.7302, y: 0.3557, w: 0.0746, h: 0.1086 },
-  { x: 0.8170, y: 0.3557, w: 0.0364, h: 0.1086 },
-  { x: 0.9426, y: 0.3557, w: 0.0568, h: 0.1086 },
-  { x: 0.0351, y: 0.5074, w: 0.0625, h: 0.1146 },
-  { x: 0.1084, y: 0.5074, w: 0.0867, h: 0.1146 },
-  { x: 0.2481, y: 0.5074, w: 0.1454, h: 0.1146 },
-  { x: 0.4043, y: 0.5074, w: 0.0727, h: 0.1146 },
-  { x: 0.5319, y: 0.5074, w: 0.0644, h: 0.1146 },
-  { x: 0.6078, y: 0.5074, w: 0.0689, h: 0.1146 },
-  { x: 0.7296, y: 0.5074, w: 0.0753, h: 0.1146 },
-  { x: 0.8170, y: 0.5074, w: 0.0364, h: 0.1146 },
-  { x: 0.9330, y: 0.5074, w: 0.0663, h: 0.1146 },
-  { x: 0.0351, y: 0.6622, w: 0.0625, h: 0.1205 },
-  { x: 0.1084, y: 0.6622, w: 0.0867, h: 0.1205 },
-  { x: 0.2481, y: 0.6622, w: 0.1454, h: 0.1205 },
-  { x: 0.4043, y: 0.6622, w: 0.0727, h: 0.1205 },
-  { x: 0.5319, y: 0.6622, w: 0.0644, h: 0.1205 },
-  { x: 0.6078, y: 0.6622, w: 0.0689, h: 0.1205 },
-  { x: 0.7296, y: 0.6622, w: 0.0753, h: 0.1205 },
-  { x: 0.8170, y: 0.6622, w: 0.0364, h: 0.1205 },
-  { x: 0.9330, y: 0.6622, w: 0.0663, h: 0.1205 },
-  { x: 0.0357, y: 0.8304, w: 0.0619, h: 0.1146 },
-  { x: 0.1084, y: 0.8304, w: 0.0855, h: 0.1146 },
-  { x: 0.2494, y: 0.8304, w: 0.1441, h: 0.1146 },
-  { x: 0.4043, y: 0.8304, w: 0.0714, h: 0.1146 },
-  { x: 0.5319, y: 0.8304, w: 0.0644, h: 0.1146 },
-  { x: 0.6078, y: 0.8304, w: 0.0963, h: 0.1146 },
-  { x: 0.8170, y: 0.8304, w: 0.0364, h: 0.1146 },
-  { x: 0.9343, y: 0.8304, w: 0.0651, h: 0.1146 }
+  { x: 0.0108, y: 0.0268, w: 0.0141, h: 0.1175 },
+  { x: 0.0249, y: 0.0268, w: 0.0076, h: 0.1175 },
+  { x: 0.0325, y: 0.0283, w: 0.0141, h: 0.1160 },
+  { x: 0.0466, y: 0.0432, w: 0.0185, h: 0.1011 },
+  { x: 0.0651, y: 0.0179, w: 0.0197, h: 0.1264 },
+  { x: 0.0848, y: 0.0074, w: 0.0128, h: 0.1369 },
+  { x: 0.1084, y: 0.0446, w: 0.0134, h: 0.0997 },
+  { x: 0.1218, y: 0.0432, w: 0.0115, h: 0.1011 },
+  { x: 0.1333, y: 0.0417, w: 0.0121, h: 0.1026 },
+  { x: 0.1454, y: 0.0461, w: 0.0083, h: 0.0982 },
+  { x: 0.1537, y: 0.0313, w: 0.0185, h: 0.1130 },
+  { x: 0.1722, y: 0.0446, w: 0.0064, h: 0.0997 },
+  { x: 0.1786, y: 0.0357, w: 0.0185, h: 0.1086 },
+  { x: 0.1971, y: 0.0253, w: 0.0083, h: 0.1190 },
+  { x: 0.2353, y: 0.0476, w: 0.0058, h: 0.0967 },
+  { x: 0.2411, y: 0.0298, w: 0.0115, h: 0.1145 },
+  { x: 0.2526, y: 0.0313, w: 0.0082, h: 0.1130 },
+  { x: 0.2608, y: 0.0313, w: 0.0058, h: 0.1130 },
+  { x: 0.2666, y: 0.0476, w: 0.0210, h: 0.0967 },
+  { x: 0.2876, y: 0.0193, w: 0.0058, h: 0.1250 },
+  { x: 0.2934, y: 0.0179, w: 0.0172, h: 0.1264 },
+  { x: 0.3106, y: 0.0461, w: 0.0108, h: 0.0982 },
+  { x: 0.3214, y: 0.0357, w: 0.0115, h: 0.1086 },
+  { x: 0.3329, y: 0.0357, w: 0.0128, h: 0.1086 },
+  { x: 0.3457, y: 0.0446, w: 0.0134, h: 0.0997 },
+  { x: 0.3591, y: 0.0476, w: 0.0178, h: 0.0967 },
+  { x: 0.3769, y: 0.0253, w: 0.0166, h: 0.1190 },
+  { x: 0.4043, y: 0.0476, w: 0.0102, h: 0.0967 },
+  { x: 0.4145, y: 0.0432, w: 0.0147, h: 0.1011 },
+  { x: 0.4292, y: 0.0461, w: 0.0166, h: 0.0982 },
+  { x: 0.4458, y: 0.0476, w: 0.0236, h: 0.0967 },
+  { x: 0.4694, y: 0.0283, w: 0.0159, h: 0.1160 },
+  { x: 0.4853, y: 0.0283, w: 0.0064, h: 0.1160 },
+  { x: 0.5096, y: 0.0446, w: 0.0089, h: 0.0997 },
+  { x: 0.5185, y: 0.0446, w: 0.0108, h: 0.0997 },
+  { x: 0.5293, y: 0.0298, w: 0.0058, h: 0.1145 },
+  { x: 0.5351, y: 0.0461, w: 0.0178, h: 0.0982 },
+  { x: 0.5529, y: 0.0313, w: 0.0192, h: 0.1130 },
+  { x: 0.5721, y: 0.0446, w: 0.0108, h: 0.0997 },
+  { x: 0.5829, y: 0.0417, w: 0.0134, h: 0.1026 },
+  { x: 0.6078, y: 0.0268, w: 0.0191, h: 0.1175 },
+  { x: 0.6269, y: 0.0372, w: 0.0058, h: 0.1071 },
+  { x: 0.6327, y: 0.0372, w: 0.0165, h: 0.1071 },
+  { x: 0.6492, y: 0.0461, w: 0.0090, h: 0.0982 },
+  { x: 0.6582, y: 0.0074, w: 0.0076, h: 0.1369 },
+  { x: 0.6658, y: 0.0313, w: 0.0121, h: 0.1130 },
+  { x: 0.6779, y: 0.0357, w: 0.0122, h: 0.1086 },
+  { x: 0.6901, y: 0.0298, w: 0.0140, h: 0.1145 },
+  { x: 0.7156, y: 0.0357, w: 0.0095, h: 0.1086 },
+  { x: 0.7251, y: 0.0476, w: 0.0109, h: 0.0967 },
+  { x: 0.7360, y: 0.0283, w: 0.0057, h: 0.1160 },
+  { x: 0.7417, y: 0.0298, w: 0.0102, h: 0.1145 },
+  { x: 0.7519, y: 0.0461, w: 0.0147, h: 0.0982 },
+  { x: 0.7666, y: 0.0283, w: 0.0153, h: 0.1160 },
+  { x: 0.7819, y: 0.0461, w: 0.0229, h: 0.0982 },
+  { x: 0.8170, y: 0.0238, w: 0.0095, h: 0.1205 },
+  { x: 0.8265, y: 0.0446, w: 0.0102, h: 0.0997 },
+  { x: 0.8367, y: 0.0417, w: 0.0160, h: 0.1026 },
+  { x: 0.8527, y: 0.0417, w: 0.0108, h: 0.1026 },
+  { x: 0.8635, y: 0.0417, w: 0.0128, h: 0.1026 },
+  { x: 0.8763, y: 0.0565, w: 0.0127, h: 0.0878 },
+  { x: 0.8890, y: 0.0446, w: 0.0141, h: 0.0997 },
+  { x: 0.9133, y: 0.0372, w: 0.0114, h: 0.1071 },
+  { x: 0.9247, y: 0.0298, w: 0.0122, h: 0.1145 },
+  { x: 0.9369, y: 0.0536, w: 0.0095, h: 0.0907 },
+  { x: 0.9464, y: 0.0074, w: 0.0141, h: 0.1369 },
+  { x: 0.9605, y: 0.0461, w: 0.0114, h: 0.0982 },
+  { x: 0.9719, y: 0.0461, w: 0.0102, h: 0.0982 },
+  { x: 0.9821, y: 0.0446, w: 0.0173, h: 0.0997 },
+  { x: 0.0344, y: 0.1905, w: 0.0173, h: 0.1131 },
+  { x: 0.0517, y: 0.1905, w: 0.0089, h: 0.1131 },
+  { x: 0.0606, y: 0.1979, w: 0.0166, h: 0.1057 },
+  { x: 0.0772, y: 0.2024, w: 0.0063, h: 0.1012 },
+  { x: 0.0835, y: 0.1905, w: 0.0141, h: 0.1131 },
+  { x: 0.1084, y: 0.1949, w: 0.0134, h: 0.1087 },
+  { x: 0.1218, y: 0.2024, w: 0.0109, h: 0.1012 },
+  { x: 0.1327, y: 0.1920, w: 0.0146, h: 0.1116 },
+  { x: 0.1473, y: 0.1935, w: 0.0134, h: 0.1101 },
+  { x: 0.1607, y: 0.2068, w: 0.0128, h: 0.0968 },
+  { x: 0.1735, y: 0.2188, w: 0.0095, h: 0.0848 },
+  { x: 0.1830, y: 0.1905, w: 0.0122, h: 0.1131 },
+  { x: 0.2481, y: 0.2277, w: 0.0096, h: 0.0759 },
+  { x: 0.2577, y: 0.1905, w: 0.0076, h: 0.1131 },
+  { x: 0.2653, y: 0.2083, w: 0.0077, h: 0.0953 },
+  { x: 0.2730, y: 0.2083, w: 0.0063, h: 0.0953 },
+  { x: 0.2793, y: 0.2202, w: 0.0102, h: 0.0834 },
+  { x: 0.2895, y: 0.1905, w: 0.0128, h: 0.1131 },
+  { x: 0.3023, y: 0.1905, w: 0.0096, h: 0.1131 },
+  { x: 0.3119, y: 0.1979, w: 0.0172, h: 0.1057 },
+  { x: 0.3291, y: 0.2068, w: 0.0147, h: 0.0968 },
+  { x: 0.3438, y: 0.2068, w: 0.0095, h: 0.0968 },
+  { x: 0.3533, y: 0.1964, w: 0.0140, h: 0.1072 },
+  { x: 0.3673, y: 0.2009, w: 0.0103, h: 0.1027 },
+  { x: 0.3776, y: 0.1905, w: 0.0076, h: 0.1131 },
+  { x: 0.3852, y: 0.1905, w: 0.0083, h: 0.1131 },
+  { x: 0.4043, y: 0.1905, w: 0.0166, h: 0.1131 },
+  { x: 0.4209, y: 0.1920, w: 0.0109, h: 0.1116 },
+  { x: 0.4318, y: 0.1905, w: 0.0127, h: 0.1131 },
+  { x: 0.4445, y: 0.2039, w: 0.0096, h: 0.0997 },
+  { x: 0.4541, y: 0.1905, w: 0.0108, h: 0.1131 },
+  { x: 0.4649, y: 0.2262, w: 0.0141, h: 0.0774 },
+  { x: 0.5287, y: 0.1905, w: 0.0179, h: 0.1131 },
+  { x: 0.5466, y: 0.1920, w: 0.0121, h: 0.1116 },
+  { x: 0.5587, y: 0.1905, w: 0.0127, h: 0.1131 },
+  { x: 0.5714, y: 0.1994, w: 0.0141, h: 0.1042 },
+  { x: 0.5855, y: 0.1905, w: 0.0108, h: 0.1131 },
+  { x: 0.6078, y: 0.1979, w: 0.0102, h: 0.1057 },
+  { x: 0.6180, y: 0.2068, w: 0.0089, h: 0.0968 },
+  { x: 0.6269, y: 0.1905, w: 0.0223, h: 0.1131 },
+  { x: 0.6492, y: 0.1920, w: 0.0115, h: 0.1116 },
+  { x: 0.6607, y: 0.1905, w: 0.0121, h: 0.1131 },
+  { x: 0.6728, y: 0.1905, w: 0.0058, h: 0.1131 },
+  { x: 0.7302, y: 0.1905, w: 0.0102, h: 0.1131 },
+  { x: 0.7404, y: 0.2202, w: 0.0141, h: 0.0834 },
+  { x: 0.7545, y: 0.1905, w: 0.0108, h: 0.1131 },
+  { x: 0.7653, y: 0.2009, w: 0.0121, h: 0.1027 },
+  { x: 0.7774, y: 0.2068, w: 0.0115, h: 0.0968 },
+  { x: 0.7889, y: 0.1905, w: 0.0159, h: 0.1131 },
+  { x: 0.8170, y: 0.2009, w: 0.0063, h: 0.1027 },
+  { x: 0.8233, y: 0.1905, w: 0.0147, h: 0.1131 },
+  { x: 0.8380, y: 0.2083, w: 0.0058, h: 0.0953 },
+  { x: 0.8438, y: 0.1935, w: 0.0057, h: 0.1101 },
+  { x: 0.8495, y: 0.1905, w: 0.0096, h: 0.1131 },
+  { x: 0.8591, y: 0.2143, w: 0.0070, h: 0.0893 },
+  { x: 0.8661, y: 0.1905, w: 0.0057, h: 0.1131 },
+  { x: 0.8718, y: 0.1905, w: 0.0077, h: 0.1131 },
+  { x: 0.9426, y: 0.1905, w: 0.0140, h: 0.1131 },
+  { x: 0.9566, y: 0.2158, w: 0.0102, h: 0.0878 },
+  { x: 0.9668, y: 0.2009, w: 0.0058, h: 0.1027 },
+  { x: 0.9726, y: 0.1949, w: 0.0095, h: 0.1087 },
+  { x: 0.9821, y: 0.1905, w: 0.0173, h: 0.1131 },
+  { x: 0.0344, y: 0.3557, w: 0.0090, h: 0.1086 },
+  { x: 0.0434, y: 0.3824, w: 0.0102, h: 0.0819 },
+  { x: 0.0536, y: 0.3676, w: 0.0102, h: 0.0967 },
+  { x: 0.0638, y: 0.3557, w: 0.0102, h: 0.1086 },
+  { x: 0.0740, y: 0.3557, w: 0.0121, h: 0.1086 },
+  { x: 0.0861, y: 0.3631, w: 0.0115, h: 0.1012 },
+  { x: 0.1084, y: 0.3661, w: 0.0077, h: 0.0982 },
+  { x: 0.1161, y: 0.3661, w: 0.0115, h: 0.0982 },
+  { x: 0.1276, y: 0.3557, w: 0.0204, h: 0.1086 },
+  { x: 0.1480, y: 0.3631, w: 0.0095, h: 0.1012 },
+  { x: 0.1575, y: 0.3780, w: 0.0198, h: 0.0863 },
+  { x: 0.1773, y: 0.3557, w: 0.0179, h: 0.1086 },
+  { x: 0.2481, y: 0.3557, w: 0.0147, h: 0.1086 },
+  { x: 0.2628, y: 0.3780, w: 0.0153, h: 0.0863 },
+  { x: 0.2781, y: 0.3824, w: 0.0102, h: 0.0819 },
+  { x: 0.2883, y: 0.3557, w: 0.0210, h: 0.1086 },
+  { x: 0.3093, y: 0.3571, w: 0.0115, h: 0.1072 },
+  { x: 0.3208, y: 0.3958, w: 0.0159, h: 0.0685 },
+  { x: 0.3367, y: 0.3557, w: 0.0160, h: 0.1086 },
+  { x: 0.3527, y: 0.3557, w: 0.0076, h: 0.1086 },
+  { x: 0.3603, y: 0.3705, w: 0.0166, h: 0.0938 },
+  { x: 0.3769, y: 0.3557, w: 0.0166, h: 0.1086 },
+  { x: 0.4043, y: 0.3646, w: 0.0211, h: 0.0997 },
+  { x: 0.4254, y: 0.3557, w: 0.0121, h: 0.1086 },
+  { x: 0.4375, y: 0.3557, w: 0.0102, h: 0.1086 },
+  { x: 0.4477, y: 0.3810, w: 0.0134, h: 0.0833 },
+  { x: 0.4611, y: 0.3557, w: 0.0179, h: 0.1086 },
+  { x: 0.5287, y: 0.3557, w: 0.0102, h: 0.1086 },
+  { x: 0.5389, y: 0.3557, w: 0.0108, h: 0.1086 },
+  { x: 0.5497, y: 0.3795, w: 0.0096, h: 0.0848 },
+  { x: 0.5593, y: 0.3631, w: 0.0121, h: 0.1012 },
+  { x: 0.5714, y: 0.3824, w: 0.0115, h: 0.0819 },
+  { x: 0.5829, y: 0.3958, w: 0.0134, h: 0.0685 },
+  { x: 0.6078, y: 0.3586, w: 0.0121, h: 0.1057 },
+  { x: 0.6199, y: 0.3631, w: 0.0217, h: 0.1012 },
+  { x: 0.6416, y: 0.3854, w: 0.0095, h: 0.0789 },
+  { x: 0.6511, y: 0.3557, w: 0.0115, h: 0.1086 },
+  { x: 0.6626, y: 0.3824, w: 0.0083, h: 0.0819 },
+  { x: 0.6709, y: 0.3557, w: 0.0077, h: 0.1086 },
+  { x: 0.7302, y: 0.3557, w: 0.0064, h: 0.1086 },
+  { x: 0.7366, y: 0.3795, w: 0.0236, h: 0.0848 },
+  { x: 0.7602, y: 0.3557, w: 0.0083, h: 0.1086 },
+  { x: 0.7685, y: 0.3557, w: 0.0159, h: 0.1086 },
+  { x: 0.7844, y: 0.3661, w: 0.0109, h: 0.0982 },
+  { x: 0.7953, y: 0.3795, w: 0.0095, h: 0.0848 },
+  { x: 0.8170, y: 0.3571, w: 0.0108, h: 0.1072 },
+  { x: 0.8278, y: 0.3795, w: 0.0147, h: 0.0848 },
+  { x: 0.8425, y: 0.3557, w: 0.0108, h: 0.1086 },
+  { x: 0.9426, y: 0.3824, w: 0.0115, h: 0.0819 },
+  { x: 0.9541, y: 0.3661, w: 0.0229, h: 0.0982 },
+  { x: 0.9770, y: 0.3824, w: 0.0134, h: 0.0819 },
+  { x: 0.9904, y: 0.3780, w: 0.0090, h: 0.0863 },
+  { x: 0.0351, y: 0.5253, w: 0.0121, h: 0.0967 },
+  { x: 0.0472, y: 0.5327, w: 0.0140, h: 0.0893 },
+  { x: 0.0612, y: 0.5074, w: 0.0147, h: 0.1146 },
+  { x: 0.0759, y: 0.5372, w: 0.0064, h: 0.0848 },
+  { x: 0.0823, y: 0.5074, w: 0.0095, h: 0.1146 },
+  { x: 0.0918, y: 0.5074, w: 0.0058, h: 0.1146 },
+  { x: 0.1084, y: 0.5074, w: 0.0153, h: 0.1146 },
+  { x: 0.1237, y: 0.5179, w: 0.0102, h: 0.1041 },
+  { x: 0.1339, y: 0.5164, w: 0.0090, h: 0.1056 },
+  { x: 0.1429, y: 0.5253, w: 0.0261, h: 0.0967 },
+  { x: 0.1690, y: 0.5074, w: 0.0115, h: 0.1146 },
+  { x: 0.1805, y: 0.5074, w: 0.0083, h: 0.1146 },
+  { x: 0.1888, y: 0.5074, w: 0.0064, h: 0.1146 },
+  { x: 0.2481, y: 0.5313, w: 0.0121, h: 0.0907 },
+  { x: 0.2602, y: 0.5074, w: 0.0191, h: 0.1146 },
+  { x: 0.2793, y: 0.5104, w: 0.0102, h: 0.1116 },
+  { x: 0.2895, y: 0.5208, w: 0.0217, h: 0.1012 },
+  { x: 0.3112, y: 0.5387, w: 0.0179, h: 0.0833 },
+  { x: 0.3291, y: 0.5253, w: 0.0185, h: 0.0967 },
+  { x: 0.3476, y: 0.5074, w: 0.0121, h: 0.1146 },
+  { x: 0.3597, y: 0.5074, w: 0.0102, h: 0.1146 },
+  { x: 0.3699, y: 0.5387, w: 0.0070, h: 0.0833 },
+  { x: 0.3769, y: 0.5074, w: 0.0166, h: 0.1146 },
+  { x: 0.4043, y: 0.5253, w: 0.0102, h: 0.0967 },
+  { x: 0.4145, y: 0.5402, w: 0.0115, h: 0.0818 },
+  { x: 0.4260, y: 0.5074, w: 0.0109, h: 0.1146 },
+  { x: 0.4369, y: 0.5089, w: 0.0185, h: 0.1131 },
+  { x: 0.4554, y: 0.5074, w: 0.0140, h: 0.1146 },
+  { x: 0.4694, y: 0.5342, w: 0.0076, h: 0.0878 },
+  { x: 0.5319, y: 0.5372, w: 0.0096, h: 0.0848 },
+  { x: 0.5415, y: 0.5372, w: 0.0133, h: 0.0848 },
+  { x: 0.5548, y: 0.5193, w: 0.0122, h: 0.1027 },
+  { x: 0.5670, y: 0.5342, w: 0.0140, h: 0.0878 },
+  { x: 0.5810, y: 0.5074, w: 0.0153, h: 0.1146 },
+  { x: 0.6078, y: 0.5342, w: 0.0217, h: 0.0878 },
+  { x: 0.6295, y: 0.5179, w: 0.0089, h: 0.1041 },
+  { x: 0.6384, y: 0.5179, w: 0.0121, h: 0.1041 },
+  { x: 0.6505, y: 0.5074, w: 0.0153, h: 0.1146 },
+  { x: 0.6658, y: 0.5074, w: 0.0109, h: 0.1146 },
+  { x: 0.7296, y: 0.5372, w: 0.0083, h: 0.0848 },
+  { x: 0.7379, y: 0.5327, w: 0.0140, h: 0.0893 },
+  { x: 0.7519, y: 0.5089, w: 0.0089, h: 0.1131 },
+  { x: 0.7608, y: 0.5089, w: 0.0109, h: 0.1131 },
+  { x: 0.7717, y: 0.5193, w: 0.0115, h: 0.1027 },
+  { x: 0.7832, y: 0.5238, w: 0.0216, h: 0.0982 },
+  { x: 0.8170, y: 0.5149, w: 0.0102, h: 0.1071 },
+  { x: 0.8272, y: 0.5119, w: 0.0121, h: 0.1101 },
+  { x: 0.8393, y: 0.5119, w: 0.0083, h: 0.1101 },
+  { x: 0.8476, y: 0.5357, w: 0.0057, h: 0.0863 },
+  { x: 0.9330, y: 0.5104, w: 0.0109, h: 0.1116 },
+  { x: 0.9439, y: 0.5104, w: 0.0095, h: 0.1116 },
+  { x: 0.9534, y: 0.5268, w: 0.0147, h: 0.0952 },
+  { x: 0.9681, y: 0.5074, w: 0.0128, h: 0.1146 },
+  { x: 0.9809, y: 0.5208, w: 0.0127, h: 0.1012 },
+  { x: 0.9936, y: 0.5327, w: 0.0058, h: 0.0893 },
+  { x: 0.0351, y: 0.6622, w: 0.0095, h: 0.1205 },
+  { x: 0.0446, y: 0.6905, w: 0.0141, h: 0.0922 },
+  { x: 0.0587, y: 0.6711, w: 0.0172, h: 0.1116 },
+  { x: 0.0759, y: 0.6622, w: 0.0089, h: 0.1205 },
+  { x: 0.0848, y: 0.6622, w: 0.0128, h: 0.1205 },
+  { x: 0.1084, y: 0.6801, w: 0.0109, h: 0.1026 },
+  { x: 0.1193, y: 0.6622, w: 0.0146, h: 0.1205 },
+  { x: 0.1339, y: 0.6771, w: 0.0090, h: 0.1056 },
+  { x: 0.1429, y: 0.6801, w: 0.0178, h: 0.1026 },
+  { x: 0.1607, y: 0.6622, w: 0.0083, h: 0.1205 },
+  { x: 0.1690, y: 0.6622, w: 0.0128, h: 0.1205 },
+  { x: 0.1818, y: 0.6726, w: 0.0134, h: 0.1101 },
+  { x: 0.2481, y: 0.6622, w: 0.0172, h: 0.1205 },
+  { x: 0.2653, y: 0.6622, w: 0.0108, h: 0.1205 },
+  { x: 0.2761, y: 0.6622, w: 0.0109, h: 0.1205 },
+  { x: 0.2870, y: 0.6711, w: 0.0178, h: 0.1116 },
+  { x: 0.3048, y: 0.6622, w: 0.0090, h: 0.1205 },
+  { x: 0.3138, y: 0.6696, w: 0.0083, h: 0.1131 },
+  { x: 0.3221, y: 0.6801, w: 0.0121, h: 0.1026 },
+  { x: 0.3342, y: 0.6815, w: 0.0134, h: 0.1012 },
+  { x: 0.3476, y: 0.6637, w: 0.0064, h: 0.1190 },
+  { x: 0.3540, y: 0.6637, w: 0.0070, h: 0.1190 },
+  { x: 0.3610, y: 0.6637, w: 0.0083, h: 0.1190 },
+  { x: 0.3693, y: 0.6622, w: 0.0134, h: 0.1205 },
+  { x: 0.3827, y: 0.6622, w: 0.0108, h: 0.1205 },
+  { x: 0.4043, y: 0.7009, w: 0.0147, h: 0.0818 },
+  { x: 0.4190, y: 0.6979, w: 0.0134, h: 0.0848 },
+  { x: 0.4324, y: 0.6637, w: 0.0089, h: 0.1190 },
+  { x: 0.4413, y: 0.6637, w: 0.0153, h: 0.1190 },
+  { x: 0.4566, y: 0.6801, w: 0.0204, h: 0.1026 },
+  { x: 0.5319, y: 0.6622, w: 0.0096, h: 0.1205 },
+  { x: 0.5415, y: 0.6979, w: 0.0133, h: 0.0848 },
+  { x: 0.5548, y: 0.6741, w: 0.0134, h: 0.1086 },
+  { x: 0.5682, y: 0.6771, w: 0.0128, h: 0.1056 },
+  { x: 0.5810, y: 0.6622, w: 0.0153, h: 0.1205 },
+  { x: 0.6078, y: 0.6801, w: 0.0191, h: 0.1026 },
+  { x: 0.6269, y: 0.6830, w: 0.0083, h: 0.0997 },
+  { x: 0.6352, y: 0.6622, w: 0.0057, h: 0.1205 },
+  { x: 0.6409, y: 0.6845, w: 0.0268, h: 0.0982 },
+  { x: 0.6677, y: 0.6726, w: 0.0090, h: 0.1101 },
+  { x: 0.7296, y: 0.6949, w: 0.0089, h: 0.0878 },
+  { x: 0.7385, y: 0.6622, w: 0.0096, h: 0.1205 },
+  { x: 0.7481, y: 0.6622, w: 0.0121, h: 0.1205 },
+  { x: 0.7602, y: 0.6801, w: 0.0185, h: 0.1026 },
+  { x: 0.7787, y: 0.6801, w: 0.0070, h: 0.1026 },
+  { x: 0.7857, y: 0.6622, w: 0.0089, h: 0.1205 },
+  { x: 0.7946, y: 0.6622, w: 0.0102, h: 0.1205 },
+  { x: 0.8170, y: 0.6726, w: 0.0102, h: 0.1101 },
+  { x: 0.8272, y: 0.6741, w: 0.0261, h: 0.1086 },
+  { x: 0.9330, y: 0.6622, w: 0.0160, h: 0.1205 },
+  { x: 0.9490, y: 0.6786, w: 0.0064, h: 0.1041 },
+  { x: 0.9554, y: 0.6994, w: 0.0178, h: 0.0833 },
+  { x: 0.9732, y: 0.6637, w: 0.0262, h: 0.1190 },
+  { x: 0.0357, y: 0.8304, w: 0.0089, h: 0.1145 },
+  { x: 0.0446, y: 0.8304, w: 0.0122, h: 0.1145 },
+  { x: 0.0568, y: 0.8363, w: 0.0185, h: 0.1086 },
+  { x: 0.0753, y: 0.8304, w: 0.0223, h: 0.1145 },
+  { x: 0.1084, y: 0.8378, w: 0.0115, h: 0.1071 },
+  { x: 0.1199, y: 0.8423, w: 0.0172, h: 0.1026 },
+  { x: 0.1371, y: 0.8423, w: 0.0064, h: 0.1026 },
+  { x: 0.1435, y: 0.8304, w: 0.0185, h: 0.1145 },
+  { x: 0.1620, y: 0.8304, w: 0.0115, h: 0.1145 },
+  { x: 0.1735, y: 0.8304, w: 0.0121, h: 0.1145 },
+  { x: 0.1856, y: 0.8304, w: 0.0083, h: 0.1145 },
+  { x: 0.2494, y: 0.8304, w: 0.0178, h: 0.1145 },
+  { x: 0.2672, y: 0.8304, w: 0.0089, h: 0.1145 },
+  { x: 0.2761, y: 0.8304, w: 0.0064, h: 0.1145 },
+  { x: 0.2825, y: 0.8571, w: 0.0281, h: 0.0878 },
+  { x: 0.3106, y: 0.8348, w: 0.0159, h: 0.1101 },
+  { x: 0.3265, y: 0.8304, w: 0.0070, h: 0.1145 },
+  { x: 0.3335, y: 0.8304, w: 0.0071, h: 0.1145 },
+  { x: 0.3406, y: 0.8438, w: 0.0083, h: 0.1011 },
+  { x: 0.3489, y: 0.8571, w: 0.0089, h: 0.0878 },
+  { x: 0.3578, y: 0.8571, w: 0.0146, h: 0.0878 },
+  { x: 0.3724, y: 0.8304, w: 0.0211, h: 0.1145 },
+  { x: 0.4043, y: 0.8586, w: 0.0179, h: 0.0863 },
+  { x: 0.4222, y: 0.8601, w: 0.0127, h: 0.0848 },
+  { x: 0.4349, y: 0.8318, w: 0.0134, h: 0.1131 },
+  { x: 0.4483, y: 0.8318, w: 0.0071, h: 0.1131 },
+  { x: 0.4554, y: 0.8304, w: 0.0140, h: 0.1145 },
+  { x: 0.4694, y: 0.8304, w: 0.0064, h: 0.1145 },
+  { x: 0.5319, y: 0.8304, w: 0.0102, h: 0.1145 },
+  { x: 0.5421, y: 0.8304, w: 0.0089, h: 0.1145 },
+  { x: 0.5510, y: 0.8601, w: 0.0141, h: 0.0848 },
+  { x: 0.5651, y: 0.8601, w: 0.0153, h: 0.0848 },
+  { x: 0.5804, y: 0.8304, w: 0.0082, h: 0.1145 },
+  { x: 0.5886, y: 0.8304, w: 0.0077, h: 0.1145 },
+  { x: 0.6078, y: 0.8571, w: 0.0127, h: 0.0878 },
+  { x: 0.6205, y: 0.8304, w: 0.0153, h: 0.1145 },
+  { x: 0.6358, y: 0.8631, w: 0.0077, h: 0.0818 },
+  { x: 0.6435, y: 0.8393, w: 0.0274, h: 0.1056 },
+  { x: 0.6709, y: 0.8304, w: 0.0243, h: 0.1145 },
+  { x: 0.6952, y: 0.8378, w: 0.0089, h: 0.1071 },
+  { x: 0.8170, y: 0.8304, w: 0.0057, h: 0.1145 },
+  { x: 0.8227, y: 0.8304, w: 0.0140, h: 0.1145 },
+  { x: 0.8367, y: 0.8304, w: 0.0102, h: 0.1145 },
+  { x: 0.8469, y: 0.8616, w: 0.0064, h: 0.0833 },
+  { x: 0.9343, y: 0.8304, w: 0.0058, h: 0.1145 },
+  { x: 0.9401, y: 0.8304, w: 0.0184, h: 0.1145 },
+  { x: 0.9585, y: 0.8601, w: 0.0103, h: 0.0848 },
+  { x: 0.9688, y: 0.8318, w: 0.0127, h: 0.1131 },
+  { x: 0.9815, y: 0.8601, w: 0.0070, h: 0.0848 },
+  { x: 0.9885, y: 0.8304, w: 0.0109, h: 0.1145 }
 ];
 
-/** How many books the wall can carry: one per painted volume it can mark. */
+/**
+ * How many books the wall can carry: one per painted spine it can mark.
+ *
+ * This is a ceiling, not a cycle. Past it the OLDEST commission comes off the
+ * wall and the newest takes a spine, so the wall never marks one book twice or
+ * starts a second, fainter pass over the first.
+ */
 export const ARCHIVE_MAX = SHELF_BOOKS.length;
 
 /** How far back the wall remembers, for the things that carry a date. */
diff --git a/test/study-pulled-books.test.cjs b/test/study-pulled-books.test.cjs
index 42dd2cf74..935275cee 100644
--- a/test/study-pulled-books.test.cjs
+++ b/test/study-pulled-books.test.cjs
@@ -40,10 +40,10 @@ test('the ring never vanishes on a book drawn very small', () => {
 });
 
 test('a mark on the shelf wall is ringed for the shelf, not for the run of books', () => {
-  // The wall's marks are whole bays — a run of books far wider than it is tall
-  // — so a ring taken from the width would be a band a third of a shelf thick
-  // around the one piece of the house the pointer is resting on. Measured from
-  // the smaller side it is the ring a single volume that tall would get.
+  // A ring taken from the larger side of a mark would be a band a third of a
+  // shelf thick around the one piece of the house the pointer is resting on.
+  // Measured from the smaller side it is the ring a single volume that tall
+  // would get.
   const view = { x: 0, y: 0, w: 1568, h: 672 };
   let checked = 0;
   for (let i = 0; i < 200; i++) {
diff --git a/test/study-shelf-archive.test.cjs b/test/study-shelf-archive.test.cjs
index 84c73eb6b..56268d825 100644
--- a/test/study-shelf-archive.test.cjs
+++ b/test/study-shelf-archive.test.cjs
@@ -36,7 +36,7 @@ test('the wall holds what it can hold, and the OLDEST is what falls off', () =>
   const ids = new Set(kept.map((k) => k.id));
   for (let i = 0; i < 5; i++) assert.ok(!ids.has(`c${i}`), `c${i} — the oldest — was kept`);
   assert.ok(ids.has(`c${S.ARCHIVE_MAX + 4}`), 'the newest fell off');
-  assert.ok(S.ARCHIVE_MAX > 0 && S.ARCHIVE_MAX <= 64, 'ARCHIVE_MAX is not a bound');
+  assert.ok(S.ARCHIVE_MAX > 0 && S.ARCHIVE_MAX <= S.SHELF_BOOKS.length, 'ARCHIVE_MAX is not a bound');
   assert.ok(S.ARCHIVE_WINDOW_DAYS > 0, 'ARCHIVE_WINDOW_DAYS is not a window');
 });
 
@@ -167,8 +167,11 @@ test('no two archived things darken the same volume', () => {
   for (const a of boxes) {
     for (const b of boxes) {
       if (a === b) continue;
-      const apart = a.left + a.width <= b.left || b.left + b.width <= a.left
-        || a.top + a.height <= b.top || b.top + b.height <= a.top;
+      // Neighbouring spines share an edge, and an edge is not a volume: the
+      // tolerance is for the sum of two rounded fractions, far under a pixel.
+      const e = 1e-6;
+      const apart = a.left + a.width <= b.left + e || b.left + b.width <= a.left + e
+        || a.top + a.height <= b.top + e || b.top + b.height <= a.top + e;
       assert.ok(apart, 'two archived things were given the same painted volume');
     }
   }
@@ -196,25 +199,65 @@ test('a slot past the last volume is still a volume, not NaN geometry', () => {
 const isLamp = ([r, g, b]) => r > 200 && g > 110 && b < 110;
 
 test('between them the marks can darken the whole wall of books', () => {
+  // Measured along the foot of each shelf, where every painted book stands. A
+  // mark is one spine and stops at that book's own top, so the dark wall above
+  // a short volume is rightly left alone — and a probe of the whole panel would
+  // count that wall as a book the marks had missed.
   const panel = readPng(at(SHELVES));
+  // A ledge reads as more than one run of shelving — its front edge, its
+  // shadowed underside, and the plinth below the last shelf — so a shelf floor
+  // is a ledge with a shelf's height of books standing above it.
+  const floors = carpentry(panel).ledges
+    .filter(([top], i, all) => top - (i === 0 ? 0 : all[i - 1][1]) > 40)
+    .map(([top]) => top);
   const inSlot = (x, y) => S.SHELF_BOOKS.some((b) =>
     x >= b.x * panel.width && x < (b.x + b.w) * panel.width
     && y >= b.y * panel.height && y < (b.y + b.h) * panel.height);
   let books = 0;
   let covered = 0;
-  for (let y = 0; y < panel.height; y += 3) {
-    for (let x = 0; x < panel.width; x += 3) {
-      const px = panel.at(x, y);
-      if (isShelving(px) || isLamp(px)) continue;
-      books++;
-      if (inSlot(x, y)) covered++;
+  for (const top of floors) {
+    for (let y = top - 12; y < top - 4; y += 2) {
+      if (y < 0) continue;
+      for (let x = 0; x < panel.width; x += 2) {
+        const px = panel.at(x, y);
+        if (isShelving(px) || isLamp(px)) continue;
+        books++;
+        if (inSlot(x, y)) covered++;
+      }
     }
   }
-  assert.ok(covered / books >= 0.7,
+  assert.ok(books > 1000, `only ${books} book pixels found at the foot of the shelves`);
+  assert.ok(covered / books >= 0.8,
     `the marks can reach only ${Math.round((covered / books) * 100)}% of the painted books, `
     + 'so however much is archived the wall stays mostly as it was painted');
 });
 
+test('a mark is one standing book, not a run of them', () => {
+  // A bay of several books for one finished commission says "about this much";
+  // a single spine per commission is what lets the wall be counted. A standing
+  // volume is narrower than it is tall, and a run of them on one shelf is not.
+  const panel = readPng(at(SHELVES));
+  for (const [i, book] of S.SHELF_BOOKS.entries()) {
+    const w = book.w * panel.width;
+    const h = book.h * panel.height;
+    assert.ok(w < h * 0.75, `volume ${i} is ${w.toFixed(0)}×${h.toFixed(0)} — a run, not a book`);
+  }
+});
+
+test('one archived commission darkens exactly one spine', () => {
+  const A = loadTs('src/renderer/src/scene/study/ShelfArchive.tsx');
+  const view = { x: 0, y: 0, w: 1568, h: 672 };
+  const one = [{ id: 'T-7', label: 'the seventh folio', kind: 'commission', at: null }];
+  const marks = all(A.ShelfArchive({ books: one, panelSrc: 'shelves.png', view }),
+    (n) => n.props?.['data-shelf-book'] !== undefined);
+  assert.equal(marks.length, 1, `one commission made ${marks.length} marks`);
+  const { left, top, width, height } = marks[0].props.style;
+  const spine = S.SHELF_BOOKS[0];
+  assert.deepEqual([left, top, width, height],
+    [spine.x * view.w, spine.y * view.h, spine.w * view.w, spine.h * view.h],
+    'the mark is not the first painted spine');
+});
+
 test('no mark darkens a lamp', () => {
   // The lamps are what light the wall. A lamp shade taken down with the books
   // beside it reads as the light going out, not as the shelf filling.
@@ -236,7 +279,8 @@ test('the wall fills the way a wall of books does: top shelf first, left to righ
   for (let i = 1; i < S.SHELF_BOOKS.length; i++) {
     const a = S.SHELF_BOOKS[i - 1];
     const b = S.SHELF_BOOKS[i];
-    const sameShelf = Math.abs(a.y - b.y) < 0.02;
+    // One shelf's spines stand on one ledge, so they share a foot, not a top.
+    const sameShelf = Math.abs((a.y + a.h) - (b.y + b.h)) < 0.02;
     assert.ok(sameShelf ? b.x > a.x : b.y > a.y,
       `volume ${i} is handed out before the one to its left or on the shelf above`);
   }
@@ -562,9 +606,9 @@ test('the number fits on every volume the wall can mark', () => {
   }
 });
 
-test('the number is pasted on one spine of a bay, not across the whole run', async () => {
-  // A mark is a run of books, and a label as wide as the run is a plate across
-  // several spines with a glyph taller than any book on the wall.
+test('the number is pasted on its spine, never as a plate wider than a book', async () => {
+  // The wall's spines are not one thickness, and a label as wide as a thick
+  // one is a plate with a glyph taller than any book on the wall.
   const A = loadTs('src/renderer/src/scene/study/ShelfArchive.tsx');
   const view = { x: 0, y: 0, w: 1568, h: 672 };
   const rendered = A.ShelfArchive({
@@ -581,7 +625,7 @@ test('the number is pasted on one spine of a bay, not across the whole run', asy
   assert.ok(width <= box.height / 3,
     `the label is ${width.toFixed(0)}px wide on a shelf ${box.height.toFixed(0)}px tall`);
   assert.ok(plate.props.style.left >= 0 && plate.props.style.left + width <= box.width + 0.01,
-    'the label hangs off the bay');
+    'the label hangs off the spine');
 });
 
 test('the number is set from the spine, not from a type token', () => {