BROTHER GEORGE CUSTER JOINING 7TH CAVALRY, 1866. 1 page, Washington, Oct. 22, 1866 to his brother in which Tom gleefully announces that an Army board had approved his joining his brother's command of the 7th Cavalry at Ft Riley, Kansas, a move that ten years later would see the three Custer brothers killed at the Little Big Horn. In part: "…I was before the Board today and passed examination. I will leave tomorrow evening if possible. I expect to arrive at Ft Riley about two weeks from tomorrow…". Thomas Custer: Tom was the only Civil War soldier to twice be awarded the Congressional Medal of Honor and by war's end was serving on his brother's staff. After a year not in army, Tom Custer joined his brother George in the 7th Cavalry and ultimately fought at Little Big Horn, where Capt. Thomas Custer commanded Co. C and was likely one of the very last men of the command to meet his end at the hands of the Indian attackers. Outstanding and very rare ALS signed "Tom". CONDITION: very good. PROVENANCE: Alexander Historical, lot 355, January 2013; Martin Lane Historic & Western Americana Lifetime Collection. (02-21891/JS). $3,000-5,000.