"Brig.-Gen. James Longstreet was then a most striking figure, about forty years of age, a soldier every inch, and very handsome, tall and well proportioned, strong and active, a superb horseman and with an unsurpassed soldierly bearing, his features and expression fairly matched; eyes, glint steel blue, deep and piercing; a full brown beard, head well shaped and poised. The worst feature was the mouth, rather course; it was partly hidden, however, by his ample beard. His career had not been without mark. Graduating from West Point in 1842, he was assigned to the Fourth Infantry, the regiment which Grant joined one year later. The Mexican War coming on, Longstreet had opportunity of service and distinction which he did not fail to make the most of; wounds awaited him, and brevets to console such hurts. After peace with Mexico he was in the Indian troubles, had a long tour of duty in Texas, and eventually received the appointment of major and paymaster. It was from that rank and duty that he went at the call of his State to arm and battle for the Confederacy. History will tell how well he did it. He brought to our army a high reputation as an energetic, capable, and experienced soldier. At West Point he was fast friends with Grant, and was his best man at the latter's marriage. Grant, true as steel to his friends, never in all his subsequent marvelous career failed Longstreet when there was need."
Source: Recollections of a Confederate Staff Officer
Commentary
Moxley Sorrel's, one of James Longstreet's most trusted staff officers, first did service with the General at 1st Manassas. Following are Sorrel's thoughts on first meeting him.