Fonds contains material about the Bradt and Hansler families. The Bradt family were United Empire Loyalists from the Mohawk River Valley of New York State who settled in the Niagara peninsula. Material concerning the Hansler family is also included. The Bradt and Hansler familes were related by marriage. Material includes correspondence, notebooks, genealogical material, and an album containing locks of hair of Bradt family members.