John W. Stephenson - Sitting on the porch!

I am a descendant of John W.Stephenson's brother: Jesse Martin Stephenson. I saw a photo once of Eliza Jane and John Wesley on the porch of a huge house. He was in a rocker and she was standing beside him. It was taken when they were very old. I am assuming that it was taken in Mansfield on there property during the 1860. I have searched & searched and cannot find it again. Does anyone know why they came to texas from Alabama?
Barbara Clay