I am Richmon E. Deas, Jr. a great grandson of James Madison Deas and a great grandson of his sister Rachel.
My father was under the impression that John had died during the Civil War period but if he had children in 1867 this could not be the case.
John was born between June 1, 1844 and June 1, 1845. He is listed as being 5 years old as of June 1 in the 1850 census and 15 years as of June 1 in the 1860 census. That is as close as I have been able to get.
I have been going though the 1870 census and have found William Mathias and Martha, "Jake", Rachel, James M., Mandy, Mary J., William M. Jr., and Eliza J., but I have not found John or Shubal. I am still looking. I do not have an index for the 1870 census so it is slow going.
If you have information on John or Shubal I would appreciate a copy. Also if you know when Jake died. One other request, I would appreciate a copy of the photograph of James M.