Fonds contains photocopies of research materials from the mid to late 1800s. There have been thirteen accruals. The first accrual consists of manuscripts, research materials, photographs, newspapers and news clippings, maps, and correspondence. The second accrual consists of manuscripts, research files, and correspondence. The third accrual consists of manuscripts, research materials, Heritage Canada materials and correspondence. The fourth accrual consists of manuscripts and correspondence. The fifth accrual consists of manuscripts, correspondence, Heritage Canada materials, and Berton Celebration dinner. The sixth accrual consists of manuscripts and correspondence. The seventh accrual consists of correspondence including some early family correspondence, juvenilia and journals, and manuscripts. The eighth accrual consists of manuscripts and correspondence. The ninth accrual consists of correspondence, manuscripts, newspaper columns, news clippings. The tenth accrual (03-1998) measures 7.1 m, consists of correspondence, manuscripts, and printed materials, 1898-1998; 1994-1996 predominant. The eleventh accrual (05-1999 and 19-1999) measures 12.9 m and consists of the following: correspondence, media, contracts, manuscripts, speeches, promotional material, printed material, public relations, personal, research files and other material, artwork, photographs and audio-visual materials. The twelfth accrual (16-2002) measures 6 m and consists of correspondence, royalty statements, photographs, clippings, manuscripts and research material. The thirteenth accrual has been arranged into diaries and address book; subject files; news clippings; drawings, photographs and sound recordings; oversized materials.