Aberdare Coal Company: 50" engine, elevation of steam pipes and exhaust pipes, 6 Mar. 1857 Math Eitemau Uwchlwytho gan West Glamorgan Archive Service
Aberdare Coal Company: A pair of 12" engines: a pair of blowing engines, 20 Sep. 1852 Math Eitemau Uwchlwytho gan West Glamorgan Archive Service
