The bookplate collection comprises more than 6000 Canadian and non-Canadian bookplates. The bookplate collection of the Montrealer Philippe Masson (1911-1944), including both personal and institutional plates, contains the major portion of the Canadian bookplates, over 3000, and is arranged alphabetically. It was acquired in 1972. There are indexes to the Masson collection including ones for names, designers and mottoes and quotations. The rest of the bookplate collection is divided between armorial and non-armorial plates with the Canadian plates arranged separately. The collection is available through the Philippe Masson Collection (Bookplates) website.