Henry F. Brewerton remained in the Army after the war. He rejoined Battery B, then under the command of Henry A. du Pont, at Cumberland Maryland after his release from captivity. Brewerton went on to serve with, and eventually command, various batteries within the 5th U.S. Artillery, being stationed in such places as Richmond, Virginia; Newport, Rhode Island; Washington, D.C.; Dry Tortugas, Florida; Louisville, Kentucky; Atlanta, Georgia; and Charleston, South Carolina. He retired from the Army on 28 November 1892 with the rank of Major. Shortly after his retirement Congress passed an act retroactively promoting Brewerton to the rank of Lieutenant Colonel.
After retirement, Brewerton settled in Elizabeth, New Jersey with his wife Julia (whom he married in 1876) and four children. Brewerton died at his home in Elizabeth on 2 November 1913 after a long illness. Julia Brewerton filed for, and received, a widow's pension from the U.S. government shortly after Henry's death. She lived until 1930.
Image: CDV of Henry F. Brewerton (Hagley Digital Archives)