I have a copy of your book which has the picture of Sam? on the spine and back cover. Like you, I question the picture. I went to Henry Thompson's home in Bonne Terre in the 1950's and got a copy of his book. Mr. Thompson's picture was drawn by him and not based on the "Breihan" picture. I went to St. Louis to the police department to look for his rifle Killdevil, but they said some old guns used to be around, but could not find them.I was born in Farmington and to Sam's cave, which I also suspect. His accounts do not line up with the hole in the side of the cliff i saw in the state park.
At the suggestion of Carl Breiham, I wrote a novel based on Sam's autobiography, "The Rebel From Shepherd Mountain."