Contents include a French article, ‘L’Autorail A Turbine A Gaz’, an original draft and three further copies of document detailing resistance and acceleration, ASME Article, ‘Self-Propelled Gas Turbine Test Car’, correspondence between Hughes and J W Hill regarding universal coupling, including a paper on ‘Flexible drives for Sugar Mills’ by J W Hill, a paper and a negative showing gradient profiles, Paddington – Plymouth, a booklet, ‘Mechanical and Physical Properties of Firth-Vickers Heat-Resisting Steels’, ‘S.G. Ni-Resist’ S. Russell & Sons Ltd., ‘Properties of Austenitic Cast Irons’, locomotive diagrams, booklet, ‘A British Long-Life Gas Turbine of Advanced Design’ reproduced from ‘The Oil Engine and Gas Turbine’, hand-written charts of locomotive data, including a Schedule of G.T operating times, a chart depicting GT train power and tractive effort, a chart Depicting Acceleration from Paddington Start and sheets of locomotive data and charts