Herbert George Wells, British writer, January 1940.

"Robert Aumaitre working on Bugatti 1500 racing car wheel, Berlin, 1933."

Construction worker high above the street, New York, c 1933.

Children working in a coalmine, 1842.

Fry and Steele's Specimen of Printing Types

Construction men working on a mooring mast, USA, c 1930s.

David Hockney photographing the NMPFT, Bradford, 18 July 1985.