Title: Upper Canada Land Petitions (1763-1865)
Jean Baptiste Barthe, Junior, of the Township of Sandwich, in the Western District, ...he is a native of Detroit, and from his birth, has constantly resided either there, or at the post of Michilimackinac....
30 January 1798
Jean Baptiste Barthe papers, 1775-1780.Summary: Papers include: Ledger, kept at Sault Ste. Marie (1775-1779); Sales book, Sault Ste. Marie, September 4, 1775 - June 1, 1779; Invoice book (1778-1780; arithmetical exercise book. Jean Barthe was a brother-in-law of John Askin, Mackinac and Detroit merchant, and was associated in trade with Askin at his station at Sault Ste. Marie, Michigan.
From this Metis site:
IV)-Michel Cadotte (1764-1837) attended the College of St. Raphael, Montreal this year. Jean Baptiste Barthe, employed by (I)-John Askin (b-1749), commissaire at Mackinac, settled next to (III)-Jean Baptiste Cadotte Sr. (1723-1803) at Sault Ste Marie. They entered into a partnership in the fur trade. (IV)-Jean Baptiste Cadotte (1761-1818) took Saugemauga, an Indian woman of uncertain lineage, as his country wife in Fond du Lac, probably at LaPointe.