TLS signed “Thos. A. Edison,” one page, 8.25 x 10.75, From the Laboratory of Thomas A. Edison letterhead, May 24, 1916. Letter of thanks for a sent sample. In full: “I beg to thank you for your favor of the 22nd instant, enclosing sample of skin #5. I will experiment with this and if it is found suitable for any of my work, I shall take pleasure in communicating with you therefor.” In very good condition, with intersecting folds and light creasing, a few lightly affecting signature, light overall toning, and some scattered paper loss along edges and folds. RRAuction COA.