Putnam & Valentine was a partnership of John R. Putnam and Carlton O. Valentine, commercial photographers active in Los Angeles, circa 1898-1912. Biographies of Western Photographers by Carl Mautz (Carl Mautz Publishing, 1997) lists "W.S. Valentine," but according to a finding aid from the Seaver Center for Western History Research, Natural History Museum of Los Angeles County (http://www.oac.cdlib.org/findaid/ark:/13030/c8z89dxf/), it is Carlton O., not W.S.