The fonds consists of personal diaries and journals (1893-1918). Includes photographs, correspondence, reference material, and articles written by Hamilton related to David Thompson and the Windermere area (1912-1942).

The fonds consists of articles of association and bylaws (1882-1964); minutes (1882-1965); annual reports (1883-1968); legal documents and agreements (1882-1914); shareholders' records (1882-1966); records of townsite sales (1882-1910); records of farmland sales (1882-1968); applications and contracts with individual purchasers (1917-1934); registers of deeds transfers (1883-1977); some land examination records (1913-1927); correspondence of the Land Commissioner, especially Virginie Smith (1887-1977); financial records including cashbooks, journals and ledgers (1882-1968); and records related to mineral rights and oil and gas leases (1930-1969). Includes records of the company's affiliate, Western Provinces Land Company (1925-1969).

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