Tom Marshall was the only man to have won the GAH at Live Birds twice and was captain of the 1901 International Match team that kicked British behind
http://www.la84foundation.org/SportsLibrary/SportingLife/1902/VOL_38_NO_16/SL3816012.pdf He was captain of the 1904 U.M.C. Squad, which included R. O. Heikes, C. W. Budd, J. L. Head. T. E Hubby, W. H. Heer, J. T. Anthony, F. C. Riehl and E. D. Fulford, assisted by F. C. Butler. Marshall and the first four broke the five-man squad world's record by a score 488/500 at Palestine, Texas.
At the 1908 GAH, Tom Marshall, George Maxwell, and 4 others tied at 91. It was won by Fred Harlow (using a Remington Autoloading gun) in a shoot off with Woolfolk Henderson (Parker) after both scored 92.
http://www.la84foundation.org/SportsLibrary/SportingLife/1909/VOL_52_NO_25/SL5225020.pdf Feb 27 1909
http://www.la84foundation.org/SportsLibrary/SportingLife/1913/VOL_61_NO_20/SL6120034.PDF July 19 1913
Heikes also had a patent for a clay target thrower. I've never seen a Heikes pad Walt.