Letter from Nigel Gresley to Harold Holcroft, requesting they meet to discuss ideas relating to 3 cylinder
Scrapbook of Harold Holcroft's visit to Germany with the Institution of Locomotive Engineers, for their summer meeting
Patent for "Improvements in or relating to valve gears for engines worked by fluid pressure" by Harold Holcroft
1 document Specification of patent for "Improvements in the Valve Gear of Three and Four-cylinder Locomotives" by Harold Holcroft
2 items "The Steam Locomotive - An Historial Review" by Harold Holcroft with a contibution by Mr J. Jones, read at The Institution of Mechanical Engineers; East Midlands Branch; Graduates and Students Section
7 documents Documents relating to the development of three-cylinder valve gears, collected by Harold Holcroft
1 document "The Fairlie Locomotive; part 2: later designs and productions", by the late P. C. Dewhurst, prepared by Harold Holcroft from accumulated notes, read at The Newcomen Society.
1 document "Tractive Force and Adhesion of Locomotives", by Harold Holcroft, read at The Institution of Locomotive Inspectors and Foremen
Includes a number of plans produced or used by Holcroft, technical notes, and notebooks used to jot down results whilst carrying out trials for Great Western Railway, South Eastern and Chatham Railway and Southern Railway. Plans, drawings and notes
5 items Notebooks containing descriptions of photographs, as well as details about exposure and processing settings used
1 item Photographic portrait featuring a group of individuals in smart dress posed in front of a building.
1 file "Design in Railway Engineering" by Harold Holcroft, read at Harwell Reactor School, Atomic Energy Research Establishment
1 bundle Draft copies of letters from Harold Holcroft to Oliver Bulleid, as well as a draft of a letter to Bulleid's wife upon learning of his death, and her reply
1 docment Contribution by Harold Holcroft to an unidentified engineering reference book, in which concepts of locomotive engineering are detailed
1 item Notebook containing information about running restrictions on the newly formed Southern Railway network
1 item Notebook containing reference tables and diagrams relating to Great Western Railway, such as maximum load gauge and standard track layouts.
1 bundle Bundle regarding the newspaper article entitled "The Liverpool and Manchester Railway" by Harold Holcroft
1 item Photograph featuring a railway engineer and a man in a suit talking whilst on the footplate of Southern Railway's E850 "Lord Nelson"
2 bundles Plans and documents relating to the instalation and trialing of Anderson steam conservation equipment on the N-Class A816 locomotive
38 items in 2 bundles Set of notebooks containing field notes on locomotive trials at South Eastern and Chatham Railway
3 documents Patent for "Improved means for use in operating continuous brakes by a vacuum or compressed air" by Harold Holcroft
1 item Booklet containing power charts for N and E1 class engines, decorated with Holcroft's doodles on the inside of the covers
