A serious book collection, like a serious instrument collection, produces a chain of provenance that is, in places, more detailed than the books themselves. The world of antiquarian bookselling is small, particular, and meticulous in its records, and the records survive for decades because the trade lives on them.

The bookplate is the earliest and most enduring of the marks. A collector who plates their books with an armorial bookplate, an initialled plate, or a named one, has signed each volume in a way that survives every subsequent change of ownership. The plates are not, in themselves, secret; they are by design a statement of ownership. The cumulative record, across a library, is a precise account of what the collector owned, often with dates of acquisition and prices paid noted in the catalogues that survive.

The major auction houses publish their catalogues, and those catalogues are themselves catalogued. Sotheby's, Christie's, Bonhams, and the specialist book auctioneers maintain provenance entries that name former owners where consent is given. The named former owner appears in the lot description; the description survives in the catalogue; the catalogue survives in the major reference libraries and, increasingly, in searchable databases.

The dealer's archive is, in many cases, the most exhaustive of the records. A long-established antiquarian dealer maintains files on their best customers, on the pieces they have sold to those customers, and on the pieces they have helped those customers acquire from other sources. The files include addresses, family details, taste, and budget. They are private, but they are no longer particularly secure in the modern world; staff turnover, electronic systems, and occasional acquisitions of one firm by another carry the records into more hands than the original parties expected.

Specialist scholarship adds further visibility. A library of any importance is studied; the books it contains are catalogued in the broader reference works of the field; the collector's role in the survival or assembly of a particular type of material is noted by the scholars who depend on the collection. The collector's name, in such literature, becomes a permanent matter of bibliographical record.

Loans to exhibitions are recorded in the exhibition catalogues. A piece lent to a major show is described in the catalogue, attributed to its lender, and often photographed. The attribution may be anonymised, but the description is rarely anonymous enough to defeat the cross-reference. The collector's other holdings, the dealer's archive, and the bibliographical scholarship combine to identify the piece, and through the piece, the collector.

Death and the dispersal of a collection make the record more public still. An estate that is sold, in whole or in part, generates a sale catalogue that lists every significant piece, often with photographs, descriptions, and provenance. The collector's name becomes, in effect, the title of the sale. The catalogue is among the most heavily distributed of all auction-house publications and is held in major libraries indefinitely.

For the collector, the consequence is that a library, however carefully assembled, is rarely a private matter for anyone seriously interested in it. The book trade exists, in part, to ensure that fine collections are remembered; the scholarship and the auction record exist to preserve that memory.

The work in this category is principally about consideration at the moment of acquisition, the moment of lending, and the moment of consignment. Once a book is plated, catalogued, lent, or sold, the record it leaves is rarely under the collector's control. The decisions that produce that record can, however, be taken with the assembled picture in mind.