The Black Magician
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The Black Magician

Written by R. T. M. Scott

Initially published as a hardbound book. It was reprinted in Complete Detective Novel in 1938.
"Aurelius Smith, the ingenious American, whose exploits as an assistant to the British Secret Service in India and Ceylon gained him notoriety ... is engaged by a New York millionaire to find why and to whom his wife is paying huge sums of money for blackmail."