Chapman, Oscar L. (Oscar Littleton), 1896-1978

An unidentified man gives an address in Kalispell, Montana High School Auditorium. Also pictured: Secretary of the Interior Oscar Chapman (left of podium); and President Harry S. Truman (first row, center).

A crowd stands to welcome President Harry S. Truman (on stage, shaking hands, left) to the stage during a speaking engagement at a local high school in Kalispell, Montana. President Truman stopped there during a campaign trip through the western United States. Also pictured on stage: Margaret Truman (first row, second from left); Secretary of the Interior Oscar Chapman (first row, third from left); and Congressman Mike Mansfield (first row, second from right). All others unidentified.

President Harry S. Truman flips a fake power switch for the Hungry Horse dam in Kalispell, Montana. President Truman made a public address there while on a campaign trip through the western United States. Also pictured: Secretary of the Interior Oscar Chapman (center). Man on right is unidentified.

Secretary of the Interior Oscar Chapman (foreground) speaks at the dedication of Hungry Horse Dam outside Kalispell, Montana. Pictured, in background: C. H. Spencer, Hungry Horse Dam construction engineer (fourth from right); and Governor John W. Bonner (right). All others unidentified.

Floyd Dotson (left), Director of Administrative Services, Department of the Interior, swears in Vernon Northrop (right) as Under Secretary of the Interior. Secretary of the Interior Oscar Chapman in center.

Secretary of the Interior Oscar Chapman (center) meets with representatives of labor organizations during a trip to Indiana. Also pictured: Harlan J. Noel, CIO-PAC state director of Indiana. Man in back is unidentified.

Secretary of the Interior Oscar Chapman (center) meets with Lieutenant Governor of Indiana John A. Watkins (left) and Democratic National Committeewoman Inez Scholl during the 1952 campaign.

Joel D. Wolfsohn (center) is sworn in as Assistant Secretary of the Interior. Secretary of the Interior Oscar Chapman is at right. All others unidentified.

Secretary of the Interior Oscar Chapman (seated, second from right) talks with labor leaders during the 1952 campaign. All others are unidentified.

Miss Oklahoma Shirley Barbour (right) presents Secretary of the Interior Oscar Chapman with an invitation to attend the 30th anniversary International Petroleum Exposition in Tulsa, Oklahoma.