The elemental nature of the fire and steam made the machines seem almost alive. Each of the engines was soundly constructed, appearing unmarked by the passage of time. If oil ever does run out, I thought, here is a technology waiting to reassert itself.

(Above): Traction engines are steam engines that move. They were originally designed to pull loads along ordinary roads (and should properly be called road locomotives). They were also widely used in agriculture.

(Above): Traction engines were all built by hand, and represent engineering at its best. When a traction engine moves along a metalled road it makes a loud clattering noise that can be heard long before the machine actually appears. Lots of them have names (similar to battleships: Dreadnought, Prince of Wales, Carlisle).
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