2ND POWELL EXPEDITION. PARTY IN BOATS & READY TO START. DEPARTING FROM GREEN RIVER, WYOMING. LEFT TO RIGHT: IN THE CANONITA E.O. BEAMAN, ANDREW HATTAN, WALTER CLEMENT POWELL. IN THE EMMA DEAN : STEVEN VANDIVER JONES, JOHN K. HILLERS, JOHN WESLEY POWELL, FREDRICK S. DELLENBAUGH. IN THE NELLIE POWELL : ALMON HARRIS THOMPSON, JOHN F. STEWARD, FRANCES MARION BISHOP, FRANK RICHARDSON.
22 May 1871 – GRCA 14775.