@rnv Thoreau spent a few weeks the last summer before his death on the south bank of Lake Bde Maka Ska. For any locals who are curious, the boarding house (well, cottage, really) he stayed in was on Bde Maka Ska Parkway, somewhere between Sheridan Av and Richfield Rd.
At the time (1861), Minnesota had been a state for only three years and Minneapolis had not yet been incorporated. The lake bore the name Calhoun on official maps and nowhere else. People generally called it Loon Lake or Lake Medoza, and I believe this was the name Thoreau would have known it by.