Papers : 1811-1873.

Charles Treadwell/Tredwell was the son of Margaret Platt and Nathaniel Treadwell of Plattsburg, New York. Nathaniel Treadwell was a non-Loyalist American land speculator who purchased the seigniory of Pointe-a-l'Original in 1794. This seigniory was one of only two seigniories within Upper Canada after the creation of the province in 1791. Nathaniel Treadwell established himself at L'Original on the Ottawa River, and after his land title was recognized by the Executive Council in 1805, he opened the land to settlement and induced many Americans to join him. When he refused to swear allegiance to the British Crown at the start of the War of 1812, his land was sequestered, and he returned, with his family, to Plattsburg, New York, where he established a business.

In 1823, his son Charles Platt Treadwell returned to Upper Canada, eventually acquiring his father's property, and adding several thousand acres to his holdings. He married Helen Macdonnell, became a trustee of the Presbyterian church, and in 1834 was appointed sheriff of the Ottawa settlement of L'Original. He died, highly respected and widely mourned, on 30 November 1873.