Twice, in public, he attacked a German butcher by the name of Bemis Feldner, with a cane, and both times Feldner whipped him with his fists. Hackett was a vain, wealthy, violent gentleman, who held his blood and family in high esteem, and believed that a reverent respect was due to his great riches. He brooded over the shame of his chastisement for two weeks, and then, in a momentary fit of insanity, armed himself to the teeth, rode into town, waited a couple of hours until he saw Feldner coming down the street with his wife on his arm, and then, as the couple passed the doorway in which he had partially concealed himself, he drove a knife into Feldner's neck, killing him instantly. The widow caught the limp form and eased it to the earth. Both were drenched with blood. Hackett jocosely remarked to her that as a professional butcher's recent wife she could appreciate the artistic neatness of the job that left her in a condition to marry again, in case she wanted to. This remark, and another which he made to a friend, that his position in society made the killing of an obscure citizen simply an "eccentricity" instead of a crime, were shown to be evidences of insanity, and so Hackett escaped punishment. The jury were hardly inclined to accept these as proofs, at first, inasmuch as the prisoner had never been insane before the murder, and under the tranquilizing effect of the butchering had immediately regained his right mind; but when the defence came to show that a third cousin of Hackett's wife's stepfather was insane, and not only insane, but had a nose the very