Description:The Potteries Express takes on water at Leek station on a summer's day in 1959.
A crowd gathers at the trackside to admire the locomotive, a 'crab' 2-6-0 mogul, number 42922.
These engines were probably nicknamed 'crabs' thanks to the frantic motion of their intricate valve gear.
The term 'mogul' simply refers to the power of 1920s locomotives like this one - at least in their heyday. With three powered axles, they had the edge on other engines with only two.
This image is taken from the collection of the Churnet Valley Railway.