. . . . . . "Sentinel from Eternity" . . . . . "The Sentinel" . . . "The Sentinel (short story)" . . . "a short story" . . . . "The Sentinel (short story)" . . . . . . . . . . . . "\\\"The Sentinel\\\" (short story)" . "\\\"The Sentinel\\\"" . . . . . . . . . . . . "original story" .