Galaxy Science Fiction - December, 1953 - Volume 7, No. 3 Author:Alan E. Nourse, Robert Sheckley, Theodore Sturgeon CONTENTS: ~~~ The Caves of Steel (Conclusion) [Isaac Asimov]; NOVELETTES: The Dark Door [Alan E. Nourse]; Mr. Costello, Hero [Theodore Sturgeon]; SHORT STORIES: Hall of Mirrors [Fredric Brown]; Origins of Galactic Medicine [Edward Wellen]; One Man's Poison [Robert Sheckley]; ARTICLES: The Deadly Trees [Willy Ley]; Gone Today [H. L. Gold]