Copy of specification of patent for "Improvements in valve mechniam for three cylinder engines" by David Joy

Copy of specification of patent for "Improvements relating to Steam Superheaters" by George Hutchinson and Richard Maunsell

Copy of specification of patent for "Improvements in valve gear for locomotive and other steam engines" by Nigel Gresley

Copy of specification of patent for "Improvements in Triple Cylinder Locomotives" by Johann Stumpf