"The camping coaches" from Railway Roundabout (1958)

Beyond the end of the platform the line curved round sharply to the right between the steep banks of a cutting. On the top of the embankment on their left was a wood, and between that and the main line a single track of rails, rusty with disuse. The track ran into a siding under the embankment, and on it were standing two old railway coaches, brightly painted, with curtains in the windows. 

Malcolm Saville, Susan, Bill and the Vanishing Boy (1955)