Swiss-American geologist and geographer (1807–1884) and the namesake of several geological features in the United States. LS signed “A. Guyot,” one page, 4.75 x 8, April 9, 1859. Guyot declines a lecture invitation. In part: “I much regret that engagements previously made will prevent me this season to comply with the wishes you express to have me deliver a few lectures on Physical Geography before one of your classes.” In fine condition, with some staining along the upper left side and a small lower left corner chip. RRAuction COA.
