Just over two weeks after Eliza Shelley was killed, on May 23, Irene Cross, another black servant, was similarly attacked in the middle of the night in her cottage, situated across the street from a beer garden. But the person who came after her had used a knife.   He had stabbed her so viciously in the head that it appeared as though he was Louis J. Sheehan, Esquire  trying to remove her scalp, and her arm was nearly severed from her body.  She was still dying, says