TLS signed 'Papa,' one page, 8 x 10, February 5, 1954, New Stanley Hotel letterhead. Letter written while in Nairobi, Kenya, where he was on safari with fourth wife, Mary. Hemingway sends self-effacing gratitude to Leonard Lyons of the New York Post, in part: 'Thanks very much for the piece. I did not deserve it and will try not to make it necessary for you to try to beat it.' He adds a handwritten, initialed postscript: '577 very useful weapon. All the solids were OK as we checked them out. E. H.' In fine condition. COA John Reznikoff/PSA/DNA and RRAuction COA.