The fonds consists of photocopies of: William's correspondence (1863-1893), HBC records (1886-1892), land documents, financial records (1864-1912) and reminiscences (1911); Harriet's diaries (1889-1893); and Walter's correspondence (1866-1914). Includes two recorded interviews with Mary Traill (1970s) and extensive family photographs.

The fonds consists of diaries (1874-1905), correspondence (1871-1882), and manuscript of his reminiscences. Includes some personal correspondence of brother, Harry Parker.