Scope and Contents From the Series: From the Library's founding in August, 1887, until 1956, invoices received for book purchases were pasted according to collection (e.g. general, Ayer, Oakley, Wing, Greenlee) in large scrapbooks, indexed by source, and assigned a sequential number corresponding to accession number. In 1956, this practice was abandoned and invoices were filed for each collection by dealer name. Invoices list date of purchase, author, title, price, name of seller, catalogue number, fund, approval, and ordering...