TLS, one page, 8.5 x 11, Mount Rushmore National Memorial Commission letterhead with sepia-tone close-up of the Lincoln bust with Borglum on a precipice, looking outward, on the reverse, October 24, 1940. In part: “I remember very well your camera work on the mountain. Sometime you may be able to show me your pictures privately.” Accompanied by the original mailing envelope. In fine condition, with mild edge toning, a couple of small separations at the folds’ edges, small chip to right edge. R&R COA.