Notes for John Mayo: Source for Military Service is: John H. Gwathmey, Historical Register of Virginians in the Revolution (Richmond, 1938), p. 511; H.J. Eckenrode, List of the Revolutionary Soldiers of Virginia (Virginia State Library, Report, 1910-11; Richmond, 1912), p. 304.
More About John Mayo: Comment 1: Cumberland County Committee of Safety..