Volume entitled: "Early Days of the Electrical Industry, and Other Reminiscences of Alexander P. Trotter"
Collection of notebooks for traditional 'A' level physics course at Queen Elizabeth's Grammar School, Gainsborough
Bound manuscript translation entitled: "The Evolution & Future of Large Sailing Ships" by Professor W. Laas; translated by James Hayes
Kompleks kompensator, system Gall. Fabrikat H. Tinsley & Co., London. Betjeningsforskrift og beskrivelse
Photographic archive of the premises, work and products of the Putney Motor Co. and the subsequent Ailsa Craig companies.