The man HICKING, who murdered his wife at Derby on Monday morning, and afterwards cut his own throat, died in the Infirmary, about half-past ten o'clock in the evening, from his self-inflicted wounds.  He was an old tradesman at Derby, and, it is said, was deeply involved in debt; in fact, a writ was taken out against him on Monday morning.  Mr. H.F. GISBORNE, who was called in as soon as the perpetration of the deed was discovered, has made a post-mortem examination of the body of the deceased woman.  During the post-mortem examination a bullet was extracted from the woman's head, and it is, therefore, believed that he first shot her and then cut her throat.