Vol 46, No 6. Contents: 4 • Nonsecret • [Editorial (Astounding)] • essay by John W. Campbell, Jr. [as by The Editor] 6 • I Tell You Three Times • novelette by Raymond F. Jones 45 • Historical Note • short story by Murray Leinster 57 • In Times to Come (Astounding, February 1951) • [In Times to Come (Astounding)] • essay by The Editor 58 • Assignment in the Unknown • novelette by Frank Quattrocchi 87 • Franchise • short story by Kris Neville 96 • Hideaway • short story by F. L. Wallace 114 • The Friendly Man • short story by Gordon R. Dickson 125 • The Analytical Laboratory: November 1950 (Astounding, February 1951) • [The Analytical Laboratory] • essay by The Editor 126 • As Quick as a Thought • essay by Edmund C. Berkeley 136 • Fair Prey • short story by J. D. Lucey 150 • Book Reviews (Astounding, February 1951) • essay by L. Sprague de Camp and P. Schuyler Miller 154 • Brass Tacks & Letters.