Dowlais Iron Company: 8½” locomotive. Elevation and end view of 8½” engine, Feb. 1840 Math Eitemau Uwchlwytho gan West Glamorgan Archive Service
Dowlais Iron Company: Plan, elevation and end view of locomotive engine, 31 Aug. 1831 Math Eitemau Uwchlwytho gan West Glamorgan Archive Service
Dowlais Iron Company: Rack locomotive, elevation and plan of locomotive. n.d. Math Eitemau Uwchlwytho gan West Glamorgan Archive Service
