yerkes observatory staff sitting on the south entrance steps of the yerkes observatory with edwin brant frost sitting center facing his left

Portrait of the staff of the University of Chicago Yerkes Observatory in Williams Bay, Wisconsin sitting on the south entrance steps of the Yerkes Observatory. They are (back row, left to right) Henry J. Foote, Mary R. Calvert, Florence Baldwin, Prof. Frederick Slocum, and Wilfred Bequelin, and (front row, left to right) John A. Parkhurst, Prof. Edward Emerson Barnard, Edwin Brant Frost (observatory director sitting center) facing his left, Dr. Oliver J. Lee, and Oscar E. Romare.

Portrait of the staff of the University of Chicago Yerkes Observatory in Williams Bay, Wisconsin sitting on the south entrance steps of the Yerkes Observatory. They are (back row, left to right) Henry J. Foote, Mary R. Calvert, Florence Baldwin, Prof. Frederick Slocum, and Wilfred Bequelin, and (front row, left to right) John A. Parkhurst, Prof. Edward Emerson Barnard, Edwin Brant Frost (observatory director sitting center) facing his left, Dr. Oliver J. Lee, and Oscar E. Romare.