This collection is comprised of one letter written by Coleman to his sister, possibly named Lizzie Coleman, on July 29, 1864, written from a “camp south of Atlanta.” Coleman provides a firsthand account of the Atlanta Campaign describing the charge and repulsion of the "rebels," the reclaiming of lost artillery pieces, and capture of Confederate soldiers. Below Thomas M. Coleman's signature in the same handwriting is "E. Coleman," whose identity has not been determined. A post script stating that "Mark is all right" potentially refers to a Mark Anthony.