My great grandfather, Otis Clay Prough, had a younger brother named Thomas Jason Prough. Thomas was born 10 Sep 1883. Family story is that Thomas just left his family one day and never came back. Otis and Thomas' parents were Peter A. Prough and Sarah Ellen Diven. My great grandparents lived in Bent County, CO, at one time. One of their children, Jalia, was born there in 1914. Could your Jason Thomas Prough be Thomas Jason Prough?