This collection is composed of a letter that William Cosgrove of the 1st Ohio Light Artillery Regiment, Battery G, wrote to his aunt and uncle, Mr. and Mrs. Bowers, in Mount Vernon (Knox County) Ohio from Nashville, Tennessee on January 31, 1864. He writes of his cousin Charles's death in Memphis and his own battery's move to Nashville. Also, he speaks of conditions in camp, including a recent outbreak of smallpox and his personal troubles with rheumatism.