Rhymney Iron Company : 18” engine, Oct 1839 Math Eitemau Uwchlwytho gan West Glamorgan Archive Service
Rhymney Iron Company: 10 1/2" locomotive engine, Sectional elevation, plan and cross sections of locomotive engine for 2' 6" gauge railway, four wheels coupled Math Eitemau Uwchlwytho gan West Glamorgan Archive Service
Rhymney Iron Company: plan for 8” locomotive, 1866 Math Eitemau Uwchlwytho gan West Glamorgan Archive Service
