Document from Lieutenant Col. J E Holbrook. Died at Fort Custer in 1883

Document from Lieutenant Col. J E Holbrook. Lt. Col Holbrook had a long career of service in the American Civil War all the way through service in the Indians wars in the 1880s.
1st Lieutenant, Army, Company F, 2nd U.S. Cavalry, Transferred from Fort Custer, Montana Territory, 
Born in Maryland – Appointed from Maryland
Commissioned Captain of Volunteers, Commissary branch, August 31, 1862; Lieutenant Colonel, January 1, 1863; Brevet Major, U.S. Volunteers, June 24, 1865, for faithful and meritorious service; mustered out, June 26, 1865; 2d Lieutenant, 27th Infantry, October 2, 1867; transferred to 9th Infantry, June 14, 1869; transferred to 2d Cavalry, March 17, 1873; 1st Lieutenant, June 25, 1877; Regimental Quartermaster, June 1, 1880 to April 7, 1881; died at Fort Custer, Montana Territory, March 27, 1883. His death was due to consumption of Alcohol.
The letter reads,
“Lieutenant JE Holbrook has been connected with the substance department for over two years. I have been personally acquainted with him since August 1862 during which time he has been under my notice most favorably I am therefore able and cheerfully recommending him for his promotion and energetic characteristics, and for the faithful and efficient manner, with which the many duties of the department have been conducted under his direction
The long service of Lieutenant Holbrook is the substances department and thorough knowledge of his affairs together with the ability with which he has discharged. The same has in my opinion earned him promotion, and I would deem the public service benefited by his appointment as captain in CS which I …. Most respectfully urge for the consideration of the proper authorities.”