Unknown with Bruce & Rod Martin

From left to right above: an unknown person, Bruce Martin and Rod Martin. Charles Bruce Martin (1870-1958) and Rodney J. Martin (1882-1964) were brothers, the sons of John William "Boone" Martin and Minnie Marie Littlefield Martin. Can anyone help identify the unknown individual on the left?

Photo contributed by Ken Akers, January, 2010.
For further information please contact Ken.