I remember your Uncle "holding court" at the Elks Club in Miles City, during the late 1920's or early 1930's. My Dad took us kids to the Club to see "Colonel" Thompson and hear stories he told of the Old West as a soldier in the Indian Campaigns and elsewhere.
To honor his life, I made a sculptural plaque, portraying Colonel Thompson. The plaque is hung in the Masterson Gallery in the Range Riders Museum in Miles City. In case you are unable to visit that Museum, I am describing below what I put on the plaque:
Henry Clay Thompson, 1847 - 1936
One of Miles City's first citizens.
Teller of tales from his past as:
Cavalryman, Civil War, 1863 - 65
Infantryman, Indian Campaigns, 1869 - 79
Wagonmaster and Scout, Fort Keogh, 1880's - 90's
Wagonmaster, Spanish-American War, 1898 - 99
Known by all as the "Colonel"