Henry B. Baker, Group portrait of Union Officers. 1862-1865. Lansing. Enlisted in company A, Twentieth Infantry, aug. 9, 1862, at Lansing, for 3 years, age 24. Mustered Aug. 18, 1862. Hospital Steward aug. 19, 1862. Detailed in Division Hospital, Knoxville, Tenn., from Dec., 1863, to March, 1864. Commissioned Assistant Surgeon, March 19, 1864. Discharged to accept promotion aug. 18, 1864. Mustered Aug. 19, 1864. Mustered out and honorably discharged at DeLaney House, D. C., May 30, 1865. Present residence, Lansing, Mich. (Descriptive Roll Twentieth Michigan Volunteers). Founder Secretary of Michigan State Board of Health. Please see Descriptive Roll Twentieth Michigan Volunteers for history of medical and surgical service.