[ASTRONAUTS]. SCHIRRA, Wally (1923-2007). Autograph letter signed ("Wally Schirra"), to Sue, 19 September 1996. 1 page, 4to, small clear mounting corners to blank area. Schirra responds to a letter from a stranger: "The nicest thing about space flight was realizing that a team of over 300,000 people were working to make each Apollo mission a success." -- SHEPARD, Alan B. (1923-1998). Autograph note signed ("Alan Shepard"), to Bess Holmes, n.p., 21 January 1976. 1 page, 8vo, slightly creased. Shepard writes: "What marvelous things you have seen in your 100 year span-including the moon!" -- Together, 2 manuscripts.