There have been three accruals. The first accrual (1988, boxes 1-15) is arranged in the following series: manuscripts and typescripts of books; manuscripts and typescripts of articles, speeches and notes; correspondence relating to specific books; general correspondence. Included in the correspondence are exchanges with some of the pre-eminent scholars in the field of Canadian history. The second accrual (41-1997, boxes 16-17) is arranged in three series: correspondence; scholarly activities: contributions to books, editorial work, lectures and reviews; reviews of Eccles's work and writing by others. The third accrual (31-1998, 4.33 m, boxes 18-32) is arranged in seven series: correspondence; writing by Eccles and reviews of his work; early writings and diaries; teaching; personal material; research material, and writing by others.