Ah, so that's where Fred Saberhagen got the gimmick for his first Berserker story - "Without a Thought" / "Fortress Ship", 1963. (A spaceman uses a pet that pl

Ah, so that's where Fred Saberhagen got the gimmick for his first Berserker story - "Without a Thought" / "Fortress Ship", 1963. (A spaceman uses a pet that plays with beads to simulate not being temporarily incapacitated by a 'mind beam' attack.) Thank you.