This map of Lake St. Clair, in modern-day Michigan and Ontario, was likely created by David Thompson. A note on the reverse of this sketch reads "recd. with Mr. Thompson's letter of Oct. 27th 1820 and with a half sheet containing remarks."

This map is part of a larger archival collection (Coll. 26), which is completely digitized. To search the entire collection visit our Beyond Borders search page.

To learn more about the Barclay Collection or MHS's Beyond Borders project, please visit our project website.