National Park Service

Secretary of the Interior Oscar Chapman (standing) speaks to Interior staff during an awards ceremony where he was presented with the Distinguished Service Award. All others unidentified.

View of the head table at a dinner for Secretary and Mrs. Oscar Chapman in the Department of the Interior cafeteria. Pictured at head table: James Chapman (fourth from left); Secretary of the Interior Chapman (fifth from left); Under Secretary of the Interior Vernon Northrop (fifth from right); Ann (Mrs. Oscar) Chapman (fourth from right); and Assistant Secretary of the Interior Joel D. Wolfsohn (third from right). All others unidentified.

Secretary of the Interior Oscar Chapman (right) receives the Department of the Interior Distinguished Service Award from an unidentified man. All others unidentified.

Guests at a dinner in honor of Secretary and Mrs. Oscar Chapman in the Department of the Interior cafeteria. Pictured: Conrad L. Wirth, Director, National Park Service (second from left); and Ronald F. Lee, Assistant Director, National Park Service (second from right). All others unidentified.

Left to right: James Chapman; Secretary of the Interior Oscar Chapman; Conrad L. Wirth, Director, National Park Service; Under Secretary of the Interior Vernon Northrop; Ann (Mrs. Oscar) Chapman; and Assistant Secretary of the Interior Joel D. Wolfsohn at a dinner in honor of Secretary Chapman in the Interior cafeteria.

Unidentified Department of the Interior staff and band members at an awards ceremony in the Interior auditorium.

View of the head table at a dinner in honor of Secretary of the Interior Oscar Chapman in the Interior cafeteria. Pictured: James Chapman (fourth from left); Secretary Chapman (fourth from left); Under Secretary of the Interior Vernon Northrop (fifth from right); Ann (Mrs. Oscar) Chapman (fourth from right); and Assistant Secretary of the Interior Joel D. Wolfsohn (third from right). All others unidentified.

Department of the Interior staff sit on the stage during an awards ceremony in the auditorium while the band plays. Pictured: Secretary of the Interior Oscar Chapman (sixth from left). All others unidentified.

President Harry S. Truman (left) and Ed Kelly, Superintendent, National Park Service, turn on the lights of the National Christmas Tree during the lighting ceremony.

President Harry S. Truman (left) meets with Illinois Governor and former Democratic Presidential candidate Adlai Stevenson in the Oval Office.