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
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 Photograph taken from the back of a train just having crossed the Hohenzollernbrücke across the River Rhine, in Cologne
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
38 items in 2 bundles Set of notebooks containing field notes on locomotive trials at South Eastern and Chatham Railway
1 file "Design in Railway Engineering" by Harold Holcroft, read at Harwell Reactor School, Atomic Energy Research Establishment
1 docment Contribution by Harold Holcroft to an unidentified engineering reference book, in which concepts of locomotive engineering are detailed
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 item Notebook containing information about running restrictions on the newly formed Southern Railway network
1 document Specification of patent for "Improvements in the Valve Gear of Three and Four-cylinder Locomotives" by Harold Holcroft
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
7 documents Documents relating to the development of three-cylinder valve gears, collected by Harold Holcroft
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"
