Last night, about 11 o’clock, Mr. Wood MACKEY, son of our esteemed fellow citizen, Alex MACKEY, Esq., who lives about three miles East of Columbia, detected a negro man named Sam MORGAN, stealing corn from his crib, and attempted to arrest him, the negro made an effort to escape, and Mr. MACKEY shot and killed him.  Sam formerly belonged to Mr. John F. MORGAN, of this city, and was cultivating a portion of the Annie BOOKER farm, near Mr. MACKEY’s.