It was late in the fall of the second year of the civil war that I rejoined my company at Santa Fe, New Mexico, from detached service in the Army of the Potomac. The boom of the sunrise gun awoke me on the morning after my arrival, and I hastened to attend reveille roll-call. As I descended the steps of the officers’ quarters the men of the four companies composing the garrison were forming into line before their barracks. Details from the guard, which had just fired the gun and hoisted the national colors, were returning to the guard-house, and the officers were hastening to their places.