The way we were ~ Two girls eat lunch in a hayfield near Hawkshead in Lancashire in 1929, which is now part of Cumbria. A photo taken by Clifton R. Adams, who was sent to England by National Geographic magazine to photograph life in the country.
Adams had instructions to record its farms, towns and cities, and its residents at work and play.
He took the images in colour using Autochrome Lumière, which was the most advanced colour photographic process of the day.
The plates were covered in microscopic potato starch grains coloured red, green and blue-violet, with about four million per square inch.
Light passed through the colour filters when an image was taken, with the plate then processed to produce a positive transparency.