| Description | Date | Identifier | |
| Graph showing the index of crankshaft bending in an experimental engine under different loads and speeds. | 13th Feb 1936 | Box 127 \ 4 scan0029 | |
| Diagram of a research crankshaft bending indicator. | 13th Feb 1936 | Box 127 \ 4 scan0030 | |
| Letter to Vauxhall Motors requesting pricing information on frames and road springs. | 28th Jan 1937 | Box 127 \ 4 scan0031 | |
| Letter from Vauxhall Motors regarding collaboration on oil specifications, grading standards, and a torsional indicator. | 25th Mar 1937 | Box 127 \ 4 scan0032 | |
| Letter to Mr Alex Taub of Vauxhall Motors regarding a torsional indicator and the labeling of oils. | 24th May 1937 | Box 127 \ 4 scan0033 | |
| Comparison of wheel weights and specifications for Packard, Vauxhall, and Rover vehicles. | 1st May 1937 | Box 127 \ 4 scan0034 | |
| Performance and weight data for a 25.HP. Vauxhall. | 4th May 1937 | Box 127 \ 4 scan0035 | |
| Requesting to process an order form for a Vauxhall car obtained from Messrs. Oscroft. | 20th May 1937 | Box 127 \ 4 scan0036 | |
| Letter to A. Taub of Vauxhall Motors discussing transmission rattles and crankshaft issues. | 22th May 1937 | Box 127 \ 4 scan0037 | |
| Requesting particulars of a Vauxhall for registration and insurance details. | 28th May 1937 | Box 127 \ 4 scan0038 | |
| Letter to A. Taub of Vauxhall Motors discussing cylinder iron quality and S.A.E. oil grading. | 28th May 1937 | Box 127 \ 4 scan0039 | |
| Specification sheet for a new 25 HP Vauxhall. | 29th May 1937 | Box 127 \ 4 scan0040 | |
| Letter from Alex Taub of Vauxhall Motors discussing engine oil policy and a recent illness. | 31th May 1937 | Box 127 \ 4 scan0041 | |
| Particulars and performance figures for a Vauxhall 25 HP car. | 31th May 1937 | Box 127 \ 4 scan0042 | |
| List of wheelbase dimensions and fluid capacities. | 31th May 1937 | Box 127 \ 4 scan0043 | |
| Performance graph comparing the acceleration curves for three different car models. | 26th May 1937 | Box 127 \ 4 scan0044 | |
| Letter to Vauxhall Motors regarding tappet scuffing issues on a Chevrolet and requesting a meeting. | 14th Jun 1937 | Box 127 \ 4 scan0045 | |
| Pre-paid telex message arranging an arrival time for the following Wednesday. | 15th Jun 1937 | Box 127 \ 4 scan0046 | |
| Telegraph message confirming receipt of a previous communication and its convenience. | 15th Jun 1937 | Box 127 \ 4 scan0047 | |
| Letter detailing the history of flywheel vibration experiments on a 4 1/4' stroke six-cylinder engine. | 17th Jun 1937 | Box 127 \ 4 scan0048 | |
| Page two of a memo discussing modifications and testing of a double rear main bearing and flywheel. | 17th Jun 1937 | Box 127 \ 4 scan0049 | |
| Letter to ironfounders C. & B. Smith Ltd. requesting the production of 24 tappets. | 18th Jun 1937 | Box 127 \ 4 scan0050 | |
| Oil consumption test figures for a 25 HP Vauxhall. | 9th Jun 1937 | Box 127 \ 4 scan0051 | |
| Oil consumption test figures for a 25 HP Vauxhall car. | 19th Jun 1937 | Box 127 \ 4 scan0052 | |
| Letter to A. Taub of Vauxhall Motors regarding tappets and a proposed visit to check consumption figures. | 23th Jun 1937 | Box 127 \ 4 scan0053 | |
| Internal request to order four 6.25 x 16 Dunlop tyre covers for an experimental Vauxhall 25 HP car. | 23th Jun 1937 | Box 127 \ 4 scan0054 | |
| Order for 3 vacuum control units from the Lucas Co. | 25th Jun 1937 | Box 127 \ 4 scan0055 | |
| Graph plotting engine RPM against road speeds in MPH for a 25 Vauxhall with 6.25 x 16 tyres. | 29th Jun 1937 | Box 127 \ 4 scan0056 | |
| Invoice from G.S. Oscroft & Co. Ltd. for repairs to a Vauxhall car. | 29th Jun 1937 | Box 127 \ 4 scan0057 | |
| Payment of 3/3 to G.S.Oscroft & Co. for repairs to a Vauxhall R.C.5124. | 30th Jun 1937 | Box 127 \ 4 scan0058 | |
| Letter to A. Taub of Vauxhall Motors thanking him for information imparted to an assistant. | 5th Jul 1937 | Box 127 \ 4 scan0059 | |
| Weight analysis and inspection of a Vauxhall car, following the completion of a Bentley analysis, and a request to rebuild a Chevrolet. | 7th Jul 1937 | Box 127 \ 4 scan0060 | |
| Covering order for one Vauxhall 25 HP front pivot thrust bearing. | 9th Aug 1937 | Box 127 \ 4 scan0061 | |
| Analysis of a Vauxhall '25' engine, detailing specifications and valve gear data. | 9th Aug 1937 | Box 127 \ 4 scan0062 | |
| Specification sheet detailing the length of passages and spark plug gaps. | 11th Aug 1937 | Box 127 \ 4 scan0063 | |
| Providing particulars of the Vauxhall front suspension. | 11th Aug 1937 | Box 127 \ 4 scan0064 | |
| Technical drawing with specifications for a Vauxhall front suspension component. | 10th Oct 1937 | Box 127 \ 4 scan0065 | |
| Sales brochure for the Grosvenor 7-Seater Limousine and Saloon, detailing features, options, and price. | 10th Oct 1937 | Box 127 \ 4 scan0066 | |
| Technical specifications and valve gear data for a Vauxhall '25' engine. | 10th Oct 1937 | Box 127 \ 4 scan0067 | |
| Specifications for inlet/exhaust passage lengths and spark plug gap. | 19th Aug 1937 | Box 127 \ 4 scan0068 | |
| Letter to Vauxhall Motors Ltd. regarding issues and questions about a dismantled Vauxhall 25 rear axle. | 19th Aug 1937 | Box 127 \ 4 scan0069 | |
| Order for a steel thrust washer from Vauxhall Motors. | 20th Aug 1937 | Box 127 \ 4 scan0070 | |
| Letter from Vauxhall Motors Ltd acknowledging a letter addressed to Mr. Alex Taub. | 24th Aug 1937 | Box 127 \ 4 scan0071 | |
| Internal routing note with instructions and multiple annotations. | 31th Aug 1937 | Box 127 \ 4 scan0072 | |
| Letter from Vauxhall Motors Ltd discussing bearing wear, preload, and adjustment procedures. | 31th Aug 1937 | Box 127 \ 4 scan0073 | |
| Analysis of bearing failures due to adjustment and overloading, with lubricant performance test results. | 31th Aug 1937 | Box 127 \ 4 scan0074 | |
| Letter from Vauxhall Motors discussing the properties of oil for hypoid gears. | 1st Sep 1937 | Box 127 \ 4 scan0075 | |
| Letter to Vauxhall Motors Ltd. thanking them for their response regarding rear axles. | 1st Sep 1937 | Box 127 \ 4 scan0076 | |
| Request to book a received Vauxhall front pivot thrust bearing from Messrs. Oscrofts into the works. | 2nd Sep 1937 | Box 127 \ 4 scan0077 | |
| Requesting the reassembly of a Vauxhall chassis following a completed weight analysis. | 21th Sep 1937 | Box 127 \ 4 scan0078 | |
| Letter to A. Taub of Vauxhall Motors regarding piston development and overhead camshaft engine combustion chambers. | 24th Sep 1937 | Box 127 \ 4 scan0079 | |
| Visit to Vauxhall's to finalise the Phoenix engine design, detailing Buick's power improvements. | 28th Sep 1937 | Box 127 \ 4 scan0080 | |
| Design considerations for engine components like sump joints, con-rod crank ratios, and pistons. | 28th Sep 1937 | Box 127 \ 4 scan0081 | |
| Engine wear observations, carburation experiments, and fuel consumption tests. | 28th Sep 1937 | Box 127 \ 4 scan0082 | |
| Discussion with Maurice Olley on wishbone suspension systems and frame stiffness. | 28th Sep 1937 | Box 127 \ 4 scan0083 | |
| Request for the return of special pistons loaned to Mr. Alex Taub of Vauxhall Motors Ltd. | 30th Sep 1937 | Box 127 \ 4 scan0084 | |
| Official order be sent to Messrs. Oscroft Motors for various parts. | 7th Oct 1937 | Box 127 \ 4 scan0085 | |
| Official order be sent to Messrs. Oscroft & Co. Ltd. for materials related to a Vauxhall 25 HP. | 22th Oct 1937 | Box 127 \ 4 scan0086 | |
| Internal memorandum requesting the purchase of anchor links for Vauxhall brakes. | 3rd Nov 1937 | Box 127 \ 4 scan0087 | |
| Request to send an official order to Messrs. Sanderson & Holmes for a Vauxhall Car. | 10th Nov 1937 | Box 127 \ 4 scan0088 | |
| Confirming the collection of four Vauxhall brake links from Messrs G.S. Oscroft Ltd. | 10th Nov 1937 | Box 127 \ 4 scan0089 | |
| Invitation from Oscrofts of Derby to view a sectioned chassis of a new Ten Vauxhall. | 27th Jan 1938 | Box 127 \ 4 scan0090 | |
| Letter to A. Taub of Vauxhall Motors requesting to view their carburetter testing apparatus. | 31th Jan 1938 | Box 127 \ 4 scan0091 | |
| Letter from Vauxhall Motors to W.A. Robotham regarding a 'flow-box' idea and a proposed meeting. | 2nd Feb 1938 | Box 127 \ 4 scan0092 | |
| Covering order for a rear spring gaiter assembly received from Vauxhall Motor Ltd. | 4th Feb 1938 | Box 127 \ 4 scan0093 | |
| Letter from Vauxhall Motors Ltd discussing aviation engine combustion analysis and flame front control. | 25th Feb 1938 | Box 127 \ 4 scan0094 | |
| Page two of a memo from Alex Taub to W.A. Robotham regarding a shock factor. | 24th Feb 1938 | Box 127 \ 4 scan0095 | |
| Graph plotting combustion volume distribution and flame travel for a D.H. Aero Engine. | 24th Feb 1938 | Box 127 \ 4 scan0096 | |
| Graph showing combustion volume distribution and flame travel for a D.H. motor. | 17th Jan 1938 | Box 127 \ 4 scan0097 | |
| Letter to A. Taub of Vauxhall Motors regarding combustion chamber modifications and a visit to Derby. | 7th Mar 1938 | Box 127 \ 4 scan0098 | |
| Letter from Alex Taub of Vauxhall Motors to W.A. Robotham discussing a meeting schedule in Derby. | 10th Mar 1938 | Box 127 \ 4 scan0099 | |
| Letter to A. Taub of Vauxhall Motors Ltd. arranging accommodation for an upcoming meeting. | 11th Mar 1938 | Box 127 \ 4 scan0100 | |
| Inspection report with measurements for a 25 HP Vauxhall Grosvenor Limousine. | 11th Mar 1938 | Box 127 \ 4 scan0101 | |
| Specification sheet comparing the latest 25 HP Vauxhall Enclosed Limousine with Rolls-Royce 25/30 and Wraith models. | 28th Feb 1938 | Box 127 \ 4 scan0102 | |
| Examination and comparison of a long wheelbase Vauxhall with facing forward seats to the Wraith model. | 12th Mar 1938 | Box 127 \ 4 scan0103 | |
| Comparing the lavish equipment of a Vauxhall to the proposed B.50 model. | 12th Mar 1938 | Box 127 \ 4 scan0104 | |
| Graph plotting petrol consumption in miles per gallon against speed in M.P.H. for a Vauxhall 10 car. | 14th Mar 1938 | Box 127 \ 4 scan0105 | |
| Cover letter regarding petrol consumption data for a Vauxhall 10. | 14th Mar 1938 | Box 127 \ 4 scan0106 | |
| Letter to Vauxhall Motors discussing ignition advance curves and a carburettor issue. | 17th Mar 1938 | Box 127 \ 4 scan0107 | |
| Letter to Vauxhall Motors Ltd. regarding oil nomenclature and specifications. | 24th Mar 1938 | Box 127 \ 4 scan0108 | |
| Letter from Vauxhall Motors Ltd. regarding engine oil specifications and viscosity grading. | 1st Apr 1938 | Box 127 \ 4 scan0109 | |
| Lubricant grade comparison chart for Vauxhall Motors Ltd. | 1st Apr 1938 | Box 127 \ 4 scan0110 | |
| Engine oil specifications for Vauxhall and Bedford models from 1937 onwards. | 5th Aug 1937 | Box 127 \ 4 scan0111 | |
| Letter proposing a visit to Vauxhall Motors to inspect a carburetter metering rig and a tin plating process. | 2nd Apr 1938 | Box 127 \ 4 scan0112 | |
| Letter from Vauxhall Motors Ltd discussing engine valve design and research data. | 4th Apr 1938 | Box 127 \ 4 scan0113 | |
| Comparative data table for various American car models including Chevrolet, Oldsmobile, Pontiac, and Buick. | 6th Apr 1938 | Box 127 \ 4 scan0114 | |
| Letter to Vauxhall Motors regarding engine design, including automatic tappet adjusters and valve types. | 6th Apr 1938 | Box 127 \ 4 scan0115 | |
| Concluding page of a letter discussing potential improvements, a new head design, and a piston plating problem. | 6th Apr 1938 | Box 127 \ 4 scan0116 | |
| Blueprint showing a bump crown piston design for a ramp head, with associated combustion chamber performance charts. | 7th Apr 1938 | Box 127 \ 4 scan0117 | |
| Letter to Vauxhall Motors requesting drawings and details of their plant for blowing carburettors. | 11th Apr 1938 | Box 127 \ 4 scan0118 | |
| Letter to Vauxhall Motors advising their correspondence will be passed to Mr. Grylls upon his return from illness. | 13th Apr 1938 | Box 127 \ 4 scan0119 | |
| Letter to A. Taub of Vauxhall Motors regarding the testing of a cylinder head and piston. | 23th Apr 1938 | Box 127 \ 4 scan0120 | |
| Notes from a visit to Vauxhall Motor Co's New Research Laboratory regarding testing equipment. | 28th Apr 1938 | Box 127 \ 4 scan0121 | |
| Letter from Alex Taub of Vauxhall Motors discussing cylinder head P.D.140, a new 25 HP project and an auto tappet cam. | 25th Apr 1938 | Box 127 \ 4 scan0122 | |
| Request to send an official order for Vauxhall water pump gland assemblies. | 26th May 1938 | Box 127 \ 4 scan0123 | |
| Letter to Vauxhall Motors accepting an invitation to visit their works to study the flowbox. | 28th May 1938 | Box 127 \ 4 scan0124 | |
| Thank you letter to Vauxhall Motors regarding a visit to view their Flow Bench. | 8th Jun 1938 | Box 127 \ 4 scan0125 | |
| Covering order for a synchromesh cone for a 25/HP Vauxhall gearbox. | 8th Jun 1938 | Box 127 \ 4 scan0126 | |
| Investigation into the drag, gear change, and noise of a 25 HP Vauxhall Gearbox. | 11th Jun 1938 | Box 127 \ 4 scan0127 | |
| Visit to Vauxhall Motors Ltd. in Luton, detailing their drawing office procedures. | 16th Jun 1938 | Box 127 \ 4 scan0128 | |
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