A quote from Richard Heber: "No gentleman can be without three copies of a book, one for show, one for use, and one for borrowers." About its utterer, according to Rictor Norton: "Richard Heber (1774–1833) was an obsessive book collector, as perhaps is suggested in the pencil drawing of him. When he filled one house from floor to ceiling with his books, he bought another house; and when he filled that one, he bought another. By the time of his death, he had filled eight or nine houses with 145,000 books."
(A tip of the hat to Eric Holzenberg, director of The Grolier Club, for alerting us to this maxim.)
Pen & Anvil Quote-Card #22.