Landsat image of Manhattan, New York City, United States, 1980s.

Landsat image of Chesapeake Bay, United States, 1980s.

Landsat image of Wyoming, United States, 1974.

Two IBM computer hard drives, 1984 and 1999.

Two IBM computer hard drives, 1984 and 1999.

Fort Vancouver, Washington State, USA, 1853-1855.

Box of pool balls, 1999.

IBM computer 6 gigabyte hard drive, 1999.

'Mrs Bateman, US Navy', c 1943.

Expres departing from Paddington station, 1950s.

Camp scene in the Mojave Valley, Rio Colorado, 1853-1855.

Crossing the Hellgate River, Montana, USA, 6 January 1854.