Fonds pertains to the life of Theodore Thorne Hamilton (1890-1959) and his extended family. The documents, comprised of original letters, vital statistic certificates, photographs, and postcards, are interleaved with detailed biographical information compiled by the donor, Mr. Jim Hamilton, a second cousin (twice removed) of Theodore Thorne Hamilton. Included are approximately 100 photographs pertaining to the Skeena River flood of 1936, approximately 30 early 20th-century Bobcaygeon area postcards, and two Bibles.

This addition to the fonds consists of family correspondence relating to the land surveyor, Alfred Cameron.