One Thousand and One Conjectures

Every synagogue needed Torah scrolls, scrolls wear out fast under liturgical use, and worn scrolls were ritually retired rather than shelved — yet scrolls carry no colophons, so the best-dated manuscript population on earth contains almost none of them, and quantitative histories…

Marginal masoretic notes are not spread evenly over the biblical text; they thicken around rare spellings, look-alike sequences, and places where one verse could contaminate a near-twin. Copying errors are not spread evenly either — scribes slipped at characteristic traps like repeated…

The Cairo Geniza is routinely treated as an unfiltered mirror of medieval life — whatever paper a community produced supposedly ended up in the chamber. But the institution existed for a reason: texts bearing God's name must not be discarded profanely, and…

The Geniza chamber was emptied in the 1890s with no stratigraphic record, and its contents were dispersed across dozens of libraries — a lost excavation, archaeologically speaking. But the dispersal was not random: batches removed together were sold and donated together, so…

In Fatimid chancery practice, respect was spatial: petitions to the mighty left wide blank margins and generous space above the text — deference measured in wasted paper. Jews of Fustat wrote petitions in that idiom, but the conjecture is that the convention…

What a genizah receives is what people had in hand when they cleared their papers: overwhelmingly letters they had received, not the ones they sent, which lay in other people's houses across the Mediterranean — mostly in towns with no surviving genizah.…

Geniza letters are mostly Judaeo-Arabic — Arabic written in Hebrew letters — but they switch into Hebrew in patterned ways: openings, blessings, scriptural tags, condolences. The standard reading treats this as religious reflex; the conjecture is sharper: the density of Hebrew in…

Letter-writers do not invent their openings; they reproduce the current epistolary fashion, and in the medieval Islamicate world that fashion was set by chancery practice, which changed with dynasties and administrations. Jewish letter-writers in Fustat absorbed those conventions through constant contact with…

The Geniza preserves the waste of elementary education: alphabet practice sheets, children's copying exercises, teachers' models — writing produced in the first weeks of instruction, at a rate proportional to how many children entered instruction at all. Literary texts, by contrast, were…

Jewish legal deeds required witnesses to sign, and a signature is an involuntary literacy test: a practiced writer signs fluently, while a man who can barely write draws his name in careful, disconnected strokes — a distinction plainly visible on the page…

A responsum began life as a document: a letter of question sent to an authority, with named parties, places, sums, and local circumstances, and an answer dispatched back. It entered posterity as literature — collected, copied, eventually printed in volumes where the…

The Geniza preserves two kinds of book-lists: inventories of private libraries drawn up for estates, and the working lists of booksellers and their auctions — two censuses of the same book culture taken at different points in a book's life, the shelf…

Geniza book-lists let us count how many books individual medieval households actually owned — a number usually guessed from anecdote. Modern collections and wealth alike tend toward heavy-tailed distributions: many small holders, a few enormous ones. The conjecture is that medieval Jewish…

Geniza book-lists record actual prices paid for books, and colophons occasionally record scribal fees, giving the raw material for a genuine price series of Hebrew books across centuries — something no narrative source provides. Over those same centuries paper spread and cheapened…