John Cotton Dana

“ The number of each line, called the accession number, is written on the first page after the title-page of the book described on that line. The accession book is a life history of every book in the library. It forms such a record as any business-like person would wish to have of property entrusted to his care. It is also a catalog of all books in the library, and a useful catalog as long as the library is small. Never use an old accession number for a new book, even though the original book has disappeared from the library. ”