A dozen years before the Black Donnellys were butchered at Lucan, Ontario, another murderous rampage took place a few miles away. On June 6, 1868, three men robbed and killed a rich farmer, his wife, and her unborn child. They concocted an alibi, stuck to it, and almost got off. In fact, two of them did. The third, Nicholas Melady, went to prison and fell in love with a beautiful woman in a nearby cell. There to entrap him, she listened, learned,...