Finally , he opened an office as an independent geologist in association with his son - in - law , Ralph Guess Richardson .
In this capacity he was exploration manager , a member of the board of directors , and an officer of the Tensas Delta Land Company .
Exploration manager opened an office as an independent geologist in association with exploration manager 's son - in - law , Ralph Guess Richardson .
In this capacity he was exploration manager , a member of the board of directors , and an officer of the Tensas Delta Land Company .