The moment they entered, Anthony pointed to the floor and to a hand that protruded from beneath the bed.

Dr. Traquair is determined that either he or his wife should die. He decides to allow her to cut a deck of cards to see who will shoot whom - highest card wins.

As the winner of this deadly duel, Traquair takes flight, desperate to elude capture for his crime. Super-sleuth Anthony Bathurst takes up the chase, but it seems that, this time, he may be matching wits with someone just as crafty as he is. And when more corpses turn up, it looks as though the adversary might be far more ruthless than even Bathurst could have anticipated.

Black Edged was first published in 1939.