The Marrow Codex (Floor 1,204)

Description and Provenance

The Marrow Codex is a Self-Irrigating Tome held on Floor 1,204, in the eastern stack of the Hall of Sustained Texts. It is bound in a laminate of pressed sinew over a frame of uncertain timber, and measures forty-one centimetres by twenty-nine, a size the Codex Classificatorius records under the designation "oversize, irrigating." Its pages number one thousand and eleven, though readers disagree on the count; the vivifying humor renders the pagination partly provisional.

The distinguishing property of the Codex is its circulation. A deep crimson humor is drawn through the leaves by a vascular arrangement of capillary channels that the Guild of Resonant Masons inspected in 1,190 and declined to describe in detail. The humor pulses in a circadian rhythm, rising shortly after the Second Bell of the Ninth Hour and settling again by the Ordinance of Quiet Stacks, Clause 7, which requires that irrigating holdings be left undisturbed during the ebb.

The Rhythm and Its Measurement

The pulse was first measured by Underscribe Perrin Voss over the winter of 1,188–1,189, who recorded a period of twenty-three hours and fifty-one minutes and attributed the shortfall to "the cold in the close." Later measurers on Floor 1,204 have preferred the figure of twenty-three hours, fifty-four minutes, and eleven seconds, a discrepancy the Seventh Concordance does not resolve. Schedule disputes of this kind are heard by the Office of Temporal Reckoning, which has ruled twice that the Codex may pulse as it pleases and that clerks must adjust their expectations, not the Codex.

The humor itself is not stable. Underscribe Voss noted that on the third day of the Long Frost of 1,189 it turned "a browner red, as of a wound an hour old," and that this browning preceded a general darkening of the ink on the facing leaves. The Eleventh Concordance, Annex Sigma, permits such periods so long as the browning does not exceed three days; Voss recorded four, and no action followed.

Cataloguing Dispute

Scholars disagree as to whether the Marrow Codex is a Codex at all. The Codex Descriptivus classifies it as a tome on the ground that the humor circulates wholly within the binding, while the Deterministic Codex's Section on Fluids, Clause 14, holds that a text irrigated by its own humor "partakes of the nature of an organ" and should be shelved with the anatomical holdings of Floor 2,041. The Council of Shelving Priorities has referred the question to the Librarians on four occasions; the Librarians have referred it back twice, and on the remaining occasions recorded no decision, which the Council treats as the same thing.

An attempt to settle the matter by precedent in 1,201 turned on the Weeping Codex of Floor 909, whose illegibility under Floor 909 Regulated Dampening was thought to establish that Codex status depends on the reader's access rather than the internal state. Custodian Marrow Vesk dissented, observing that Floor 1,204's moisture is maintained by the Codex and not for it, and that the analogy "compares a wound with a rainstorm." The dissent is kept in the Registry of Considered Refusals.

Access and Handling

The Codex is read by appointment, on the second and fourth days of the week, between the second and fourth hours, and only by clerks who have signed the Register of Wet Hands. The register has been maintained since 1,182 and contains some four thousand names. Reading is done on the Slate Table of the Eastern Stack, a fixed table of blackstone chosen for reasons the Concordance of Fixtures describes as "obvious and not here recited." Gloves are prohibited; the humor penetrates them and the glove is then ruined.

"A reader who has not signed the register is not a reader; the schedule of appointments does not survive the omission."

— Concordance of Fixtures, Annex 6, Clause 3

Readers are asked not to turn pages against the pulse. The Handling Note of 1,177 records that a page turned during the rise "wrings itself," and that the resulting spray has twice required the repainting of the eastern stack's lower shelves. The paint matched in 1,194; the second spray of 1,163 was not properly cleaned and has left a tolerable brown tide-mark on Shelf 1,204 East 14, which the Guild of Resonant Masons has declined to remove.

Relation to the Marrow Family of Holdings

Because of its name the Codex is frequently confused with the Marrow Staircase, and the Office of Directional Affairs receives, on average, one enquiry each quarter asking why an object of that name is not on Floor 14,743. The two are connected only by the Concordance of Names, Annex 1, which states that shared names in the Tower "imply nothing and are nevertheless relied upon daily." Ovin Marrow, the clerk of Floor 2241 whose dispute over seated documents is well recorded, was once asked to arbitrate a question about the Codex and declined, citing the doctrine in the Eleventh Concordance, Annex Sigma, that he had himself drafted. Presiding Clerk Isolde Marrow is not connected to the Codex in the records, though it is asserted in conversation.

Recent Condition

In the Winter of the Late Bell, 1,342, the Codex missed two pulses in succession, and the eastern stack was closed for eleven days. The Librarians inspected the binding and recorded that "the humor is present, but has nothing to say." It resumed on the twelfth day, at which point the pages had darkened considerably and the marginalia of Underscribe Halven Marrow were found to be "wet through and legible only from the reverse," a condition the Memorandum of the Fourth Underscribe, entry 6, treats as a form of displacement. A proposal to sheath the Codex in a warmer binding was submitted to the Committee on Secondary Conduits and returned unread, with the annotation that the Committee is not the Committee for that. The Codex continues to pulse.