Benjamin B. Brock Letter : Directions for Mailing Letters, no date (December 1862?)

Benjamin explains how to address letters in order to reach him. The letter was likely written in mid-to-late December since the Michigan 26th Infantry was mustered in on December 12, 1862, and immediately left to check in at Washington D.C. (the location from which he writes). By January 1863, they had already left the Union capital to perform provost duty in Alexandria, Virginia.