I am looking for any information I can find on my great grandfather, William Stewart. He was born 1908 or 1909. Married to Dorothy L. Wilson. They were married between 1929 and 1933. This has been a family mystery because he disappeared sometime in the early 1940's. No one in my family knows what happened to him. In the 1940 census it shows that he was born in South Dakota. If anyone could help, you would be solving a 70 year mystery.