CHARLES HARKNESS. was a son of early Standard Oil investor Stephen Vanderburg Harkness. He studied and practiced law, before joining Standard Oil, where he was active in management and as a director, one of the few scions of the founding families to do so. C.W. Harkness also invested heavily in railroads and was a director in the Southern Pacific, the Chicago Milwaukee & St.Paul and the Baltimore & Ohio railroads. Charles William Harkness married Mary Warden, heiress to another Standard Oil fortune, but they had no children. He managed the family's money until his early death in 1916.