I wonder if he is this Samuel Jameson that is the son of Thomas Jameson and Jane Dickey. "Mr. Jameson's son, Samuel Jameson [153], was in the Army of the Revolution, and was with Washington when he took command of the army, July 3, 1775, in Cambridge, Mass. It is not known what became of him.", pp. 43-44, Jameson, E. O., 1901. The Jamesons in America. 1647-1900. Genealogical Records and Memoranda. The Rumford Press, Concord, N. H., https://archive.org/details/jamesonsinameric00jame/page/42/mode/2up