TLS signed “A. Einstein,” one page, 7.75 x 6.75, Emergency Committee of Atomic Scientists letterhead, October 16, 1948. Brief letter of thanks to an unidentified supporter. In full: “I send you warm thanks for your generous gift towards our work. Your continued good-will and support are a vital encouragement to this Committee.” Nicely double-cloth-matted and framed with a small plaque and portrait to an overall size of 25.25 x 21. In fine condition, with a light vertical crease as well as a horizontal mailing fold. Oversized. Pre-certified John Reznikoff/PSA/DNA and RR Auction COA.