Back Vein Incline: Again from a 1920's publicity brochure. My guess is that the steam is from an engine driving a compressor, as the engine and boiler house was at this time on the opposite side. Note the four tracks! (Maenofferen-Slate-Mine-Archive-Album-Image-050)

Back Vein Incline

Again from a 1920's publicity brochure. My guess is that the steam is from an engine driving a compressor, as the engine and boiler house was at this time on the opposite side. Note the four tracks!