Lucky bunny

Crime's a man's business. So they say. Who was that small figure then, slender enough to trot along the moonlit track, swift and low, virtually invisible? Who was it that covered the green signal with a glove to stop the train, while the two others took care of the driver and his mate? Could it have been one Queenie Dove, survivor of the Depression and the Blitz, not to mention any number of scrap...