Keswick siding is an early painting by Smart. He has used rough brushstrokes to create an impression of the old building and billowing smoke. He was determined to create this painting and had to break some laws to do so, as he describes here:
‘The siding was on railway property, so I had to get off at Keswick station and climb down from the platform with my easel and gear and camera and walk along the tracks with trains rushing past. Once work is started there is always the possibility of an officious railway worker ordering you off the site.’