American soldier and politician (1737-1818) who rose to the rank of major general in the Continental Army during the American Revolution. He was later appointed governor of the Northwest Territory. Rare ALS signed “Ar S. Clair,” one page, 7.5 x 7.5, no date. Letter to Crosly Nevill. In full: “I have enclosed another note, perfect I believe now. I wish I could go and thank you for your kindness…but I have been seized by…rhumatism in one of my knees last night and cannot walk a step today.” Letter is affixed to an identical size sheet. In very good condition, with a few light pencil remnants, scattered soiling, and a few repaired small separations and areas of paper loss. St. Clair is quite rare in autograph material, with this being the first handwritten letter we have ever offered. RR Auction COA.