... not the mere figment of the brain of a vain and ambitious young man, seems to be proved by contemporaneous reports published in the prominent journals of the North. One of these is a dispatch from Harrisburg, Pa. , which appeared in the New York Herald, dated July 6, 1863, in which is announced the capture of a man on the morning of the second instant, who declared himself a member of Longstreet's staff, and a...