National Park Service

Secretary of the Interior (left) and Assistant Secretary of the Interior William Warne (right) with an unidentified man at the Department of the Interior.

Attendees of the National Christmas Tree lighting ceremony on the South Lawn of the White House. Pictured, seated: Ann (Mrs. Oscar) Chapman (front row, left); James Chapman (front row, second from left); and William J. Dougherty, Assistant Director of Information, Department of the Interior (second row, right). All others unidentified. In the background is the Washington Monument.

Members of the Cabinet greet President Harry S. Truman at Washington National Airport upon his return from a vacation in Key West, Florida. Pictured, foreground, left to right: Secretary of State Dean Acheson; President Truman; Secretary of the Interior Oscar Chapman; and Secretary of Defense Louis Johnson. All others are unidentified.

Secretary of the Interior Oscar Chapman (second row, fourth from right) and Ann (Mrs. Oscar) Chapman (second row, fourth from left) pose for a picture with unidentified women in the Secretary's office.

Oscar Chapman being sworn in as Secretary of the Interior. Pictured, left to right: Oscar Chapman; Ann (Mrs. Oscar) Chapman; Supreme Court Chief Justice Fred Vinson.

Members of President Harry S. Truman's Cabinet and staff at Washington National Airport, waiting for the arrival of President Truman from his Key West vacation. From left to right: unidentified; Secretary of State Dean Acheson; Secretary of Defense Louis Johnson; Secretary of the Interior Oscar Chapman; and Joseph Feeney, Legislative Assistant to the President. All others unidentified.

Members of the Cabinet greet President Harry S. Truman at Washington National Airport upon his return from a vacation in Key West, Florida. Pictured, foreground, left to right: President Truman; Secretary of the Interior Oscar Chapman; and Secretary of Defense Louis Johnson. All others are unidentified.

President Harry S. Truman (second from right) shakes hands with Tom C. Clark (left) after he was sworn in as an Associate Supreme Court Justice. From left to right: Associate Justice Clark; Vice President Alben Barkley; Attorney General J. Howard McGrath; Speaker of the House Sam Rayburn; President Truman; and Chief Justice Fred Vinson. Also pictured: Secretary of State Dean Acheson (background, left, behind Barkley); and Secretary of Defense Louis Johnson (background, right, behind Vinson, mostly obscured).

From left to right: Assistant Secretary of the Interior William Warne; Assistant Secretary of the Interior C. Girard Davidson; Secretary of the Interior Julius Krug; and Under Secretary of the Interior Oscar Chapman at the Department of the Interior's centennial anniversary celebration.

Under Secretary of the Interior Oscar Chapman (right) poses with an unidentified award recipient in the Department of the Interior auditorium.