| Description | Date | Identifier | |
| Letter to 'The Autocar' magazine discussing the racing performance of E.R. Hall's Bentley car, chassis No: B-35-AE. | 27th Oct 1940 | Box 144 \ 4 scan0142 | |
| Continuation of a text from 'THE AUTOCAR' regarding Bentley Motors' testing and appeal to enthusiasts. | 28th Oct 1940 | Box 144 \ 4 scan0143 | |
| Secret and confidential memo regarding the development of a launching gear for the R.A.F. using a Phantom III engine. | 28th Oct 1940 | Box 144 \ 4 scan0144 | |
| Confidential memo regarding publicity for the Bentley V chassis and its impending obsolescence. | 28th Oct 1940 | Box 144 \ 4 scan0145 | |
| Suspension, brake, and noisy gearbox issues on Barnato's car. | 28th Oct 1940 | Box 144 \ 4 scan0146 | |
| Confirmation of a telephone agreement to purchase a monocoque Morris for £150. | 29th Oct 1940 | Box 144 \ 4 scan0147 | |
| Summary of a discussion with Leyland's regarding a potential collaboration on tank design, specifically transmission systems. | 30th Oct 1940 | Box 144 \ 4 scan0148 | |
| Potential objections from Lord Beaverbrook regarding the company's work on tank design. | 30th Oct 1940 | Box 144 \ 4 scan0149 | |
| Outlining a plan for information gathering on tank design, involving a trip to Farnborough and a letter from Leyland's. | 4th Nov 1940 | Box 144 \ 4 scan0150 | |
| Copy of a letter from Leyland Motors to arrange a meeting about tank design. | 1st Nov 1940 | Box 144 \ 4 scan0151 | |
| Letter from Henry Spurrier, Jnr. detailing an enemy bombing incident involving two unexploded bombs at the axle shop. | 5th Nov 1940 | Box 144 \ 4 scan0152 | |
| Visit from Major Murphey of the Canadian Corps concerning armaments and high muzzle velocities. | 5th Nov 1940 | Box 144 \ 4 scan0153 | |
| Visit to tank trials at Farnborough, discussing tank design, production, and costs with Leyland Motors. | 10th Nov 1940 | Box 144 \ 4 scan0154 | |
| Report discussing wartime tank design, costs, production rationalisation, and a proposal for a general-purpose tank based on the Mark VI. | 10th Nov 1940 | Box 144 \ 4 scan0155 | |
| Proposal for a joint project with Leyland to improve the Mark VI tank's engine, transmission, and armament. | 10th Nov 1940 | Box 144 \ 4 scan0156 | |
| Engine types for tank propulsion and a proposed wheeled vehicle. | 10th Nov 1940 | Box 144 \ 4 scan0157 | |
| Project proposal for a joint tank design with Leyland, detailing a three-stage work plan. | 16th Nov 1940 | Box 144 \ 4 scan0158 | |
| Cross-sectional blueprint of a V-type engine with dimensional measurements. | 17th Nov 1940 | Box 144 \ 4 scan0159 | |
| Secret memorandum suggesting improvements to tank turrets, specifically regarding their armament for the war effort. | 17th Nov 1940 | Box 144 \ 4 scan0160 | |
| Visit to Nuffield Mechanisation regarding the Mark VI tank and its transmission. | 22th Nov 1940 | Box 144 \ 4 scan0161 | |
| The decision to use a Bofor gun over the Rolls Royce 40 mm gun. | 22th Nov 1940 | Box 144 \ 4 scan0162 | |
| Potential customers for the B.V. Chassis during wartime and related gearbox issues. | 22th Nov 1940 | Box 144 \ 4 scan0163 | |
| Modification to Barnato's B.V. springs by inserting a packing piece to correct a length deficiency. | 23th Nov 1940 | Box 144 \ 4 scan0164 | |
| Complaint about the front springs on a Bentley V car. | 25th Nov 1940 | Box 144 \ 4 scan0165 | |
| Proposed replacement for the Wraith model, known as S.B.50. | 26th Nov 1940 | Box 144 \ 4 scan0166 | |
| New car design, the B.50, comparing its features and dimensions to the existing Wraith model. | 26th Nov 1940 | Box 144 \ 4 scan0167 | |
| Specification comparison between two models, W.M.B. 11 and S.B.50. | 26th Nov 1940 | Box 144 \ 4 scan0168 | |
| Body dimension comparison between the Wraith III Continental Touring Limousine and the 3.B.50 model. | 26th Nov 1940 | Box 144 \ 4 scan0169 | |
| Future work and personnel arrangements for the Clan Foundry. | 26th Nov 1940 | Box 144 \ 4 scan0170 | |
| Mounting of a 40mm gun on a Morris truck for aerodrome defence. | 29th Nov 1940 | Box 144 \ 4 scan0171 | |
| The sale of a new Bentley V's to Mr. Wilmot Breedon. | 5th Dec 1940 | Box 144 \ 4 scan0172 | |
| B.U.S.M. contract production issues related to a cradle design change from brass to aluminium. | 7th Dec 1940 | Box 144 \ 4 scan0173 | |
| Internal memorandum expressing disappointment over a magazine article's write-up of a Bentley V's performance. | 9th Dec 1940 | Box 144 \ 4 scan0174 | |
| Need for direct liaison with motor papers to ensure satisfactory performance write-ups. | 9th Dec 1940 | Box 144 \ 4 scan0175 | |
| Journal page listing maximum speeds, car models, and engine sizes for various manufacturers. | 9th Dec 1940 | Box 144 \ 4 scan0176 | |
| Progress report on the Leyland Tank Project, detailing engine tests, gearbox, steering, and clutch design. | 10th Dec 1940 | Box 144 \ 4 scan0177 | |
| Meeting to finalise drawings and the decision to name the Merlin tank unit the 'Leyland Meteor' engine. | 10th Dec 1940 | Box 144 \ 4 scan0178 | |
| Progress report on the Leyland Tank Project, detailing engine tests and component design. | 10th Dec 1940 | Box 144 \ 4 scan0179 | |
| Upcoming meeting to decide on drawings and the policy to rename the Merlin tank unit to the 'Leyland Meteor' engine. | 10th Dec 1940 | Box 144 \ 4 scan0180 | |
| Tank transmission and steering, comparing arrangements and proposing to fit the Leyland Meteor engine in the Mark VI tank. | 10th Dec 1940 | Box 144 \ 4 scan0181 | |
| Project plan outlining the staged development of an engine and transmission for a new Battle Cruiser Tank. | 10th Dec 1940 | Box 144 \ 4 scan0182 | |
| Secret report detailing the general position and requirements for a projected tank's transmission and steering system. | 10th Dec 1940 | Box 144 \ 4 scan0183 | |
| Technical discussion on tank gearbox design, comparing existing systems with a proposed 5-speed synchromesh gearbox for the Merlin engine. | 10th Dec 1940 | Box 144 \ 4 scan0184 | |
| Comparison of tank projects, discussing acceleration and steering methods for tracked vehicles. | 10th Dec 1940 | Box 144 \ 4 scan0185 | |
| Comparison table of gearbox performance data for Mark V, Mark VI, and R.R. project tanks, detailing ratios, acceleration, and speeds. | 10th Dec 1940 | Box 144 \ 4 scan0186 | |
| Comparison of different tank steering systems, including Plain Differential, Clutch & Brake, and Double Gearbox. | 10th Dec 1940 | Box 144 \ 4 scan0187 | |
| Controlled differential and epicyclic steering systems for tracked vehicles. | 10th Dec 1940 | Box 144 \ 4 scan0188 | |
| Analysis of tank transmission and steering systems, featuring the Merritt Brown System. | 10th Dec 1940 | Box 144 \ 4 scan0189 | |
| The design and challenges of a steering mechanism for a tank power plant. | 10th Dec 1940 | Box 144 \ 4 scan0190 | |
| Operational characteristics of a tank's steering clutch system. | 24th Jul 1940 | Box 144 \ 4 scan0191 | |
| Diagrams of various tank steering systems. | 24th Jul 1940 | Box 144 \ 4 scan0192 | |
| Schematic diagram for a proposed tank transmission and steering system. | 8th Dec 1940 | Box 144 \ 4 scan0193 | |
| Capacity and feasibility of taking on Allison engine repairs by adapting existing Kestrel fixtures. | 10th Dec 1940 | Box 144 \ 4 scan0194 | |
| Bentley publicity and a response to statements made about car performance in 'The Motor' magazine. | 11th Dec 1940 | Box 144 \ 4 scan0195 | |
| Performance particulars of the new Bentley Mark V and Corniche models. | 1st Jan 1941 | Box 144 \ 4 scan0196 | |
| Car performance, noting a top speed of 110 m.p.h. limited by tyre life and affecting standard Bentley features. | 20th Dec 1940 | Box 144 \ 4 scan0197 | |
| Secret memo discussing the development of an advanced Leyland Meteor engine for a Mark VI tank. | 20th Dec 1940 | Box 144 \ 4 scan0198 | |
| Accuracy of performance figures for Bentley publicity and press runs. | 22th Dec 1940 | Box 144 \ 4 scan0199 | |
| Magazine capacity and performance of a 40mm ground defence gun. | 28th Dec 1940 | Box 144 \ 4 scan0200 | |
| Correspondence with Mr. Gimson about a production delay for aluminium cradles. | 12th Dec 1940 | Box 144 \ 4 scan0201 | |
| The postponement of a publicity article and demonstration for the Bentley V. | 31th Dec 1940 | Box 144 \ 4 scan0202 | |
| Potential change in lubricating oil suppliers for the new Bentley, suggesting Vacuum Oil Company and listing other approved oils. | 1st Jan 1933 | Box 145 \ 1 scan0001 | |
| Letter from the Vacuum Oil Company regarding the supply of Mobiloil for a high-speed road test in France. | 3rd Feb 1933 | Box 145 \ 1 scan0002 | |
| Letter from Vacuum Oil Company regarding Mobiloil for engine and rear axle lubrication tests. | 9th Jan 1933 | Box 145 \ 1 scan0003 | |
| Letter from the Vacuum Oil Company discussing lubricant recommendations for various vehicle components. | 9th Jan 1933 | Box 145 \ 1 scan0004 | |
| Comparison table of the physical properties for Mobiloil D, G, and E. | 11th Jul 1938 | Box 145 \ 1 scan0005 | |
| The 1933 range of Mobilgrease products and their specific applications. | 6th Oct 1932 | Box 145 \ 1 scan0006 | |
| Product information sheet detailing various Voco and Gargoyle speciality lubricants and fluids for 1933 models. | 7th Oct 1932 | Box 145 \ 1 scan0007 | |
| Letter from the Vacuum Oil Company, Limited confirming a meeting arrangement. | 23th Jan 1933 | Box 145 \ 1 scan0008 | |
| Letter from Vacuum Oil Company offering to supply oil free of charge for further tests on the new Bentley car. | 18th Feb 1933 | Box 145 \ 1 scan0009 | |
| Letter from the Vacuum Oil Company regarding the urgent delivery of a barrel of Mobiloil 'D' to Paris. | 1st Mar 1933 | Box 145 \ 1 scan0010 | |
| Internal request to order 10 gallons of Mobiloil 'D' for use on Bentley cars. | 10th May 1933 | Box 145 \ 1 scan0011 | |
| Requesting an order to be placed for a 5 gallon drum of Mobiloil 'D' for a Bentley. | 11th May 1933 | Box 145 \ 1 scan0012 | |
| Letter from the Vacuum Oil Company Limited arranging a meeting with Mr. E.W. Hives. | 24th May 1933 | Box 145 \ 1 scan0013 | |
| Letter from the Vacuum Oil Company about satisfactory oil test results and recommending Mobiloil 'EP' for hypoid gear lubrication. | 29th Apr 1933 | Box 145 \ 1 scan0014 | |
| Letter of introduction for Mr. Hives' forthcoming visit to France for tests on the new Rolls-Bentley car. | 1st May 1933 | Box 145 \ 1 scan0015 | |
| Letter from the Vacuum Oil Company regarding experimental work on Mobilgrease and a comparison of Mobiloil Aero H and Aero W. | 4th May 1933 | Box 145 \ 1 scan0016 | |
| Letter from the Vacuum Oil Company discussing Mobiloil Aero 'H' performance in Prestone-cooled Wright 'Conqueror' engines. | 4th May 1933 | Box 145 \ 1 scan0017 | |
| Letter from Vacuum Oil Company, Ltd. to Messrs. Rolls-Royce Limited. | 4th May 1933 | Box 145 \ 1 scan0018 | |
| Test results comparing the performance of different brands of grease. | 25th May 1933 | Box 145 \ 1 scan0019 | |
| Follow-up letter from oil importers Rimer Bros. Ltd. regarding a discussion about their motor oils. | 25th May 1933 | Box 145 \ 1 scan0020 | |
| Letter from the Vacuum Oil Company arranging an interview for Mr. J. Russell Sharp. | 26th Jul 1933 | Box 145 \ 1 scan0021 | |
| Use of Vacuum Oils for Bentley hypoid axles and arranging a dynamometer test. | 29th Jul 1933 | Box 145 \ 1 scan0022 | |
| Letter from the Vacuum Oil Company detailing lubricant recommendations for Rolls-Bentley cars. | 31th Jul 1933 | Box 145 \ 1 scan0023 | |
| Letter from Vacuum Oil Company regarding samples of Mobiloil and Mobilgrease sent for trial. | 31th Jul 1933 | Box 145 \ 1 scan0024 | |
| Product information sheet for Voco Speciality Products such as various oils and fluids for vehicle maintenance. | 6th Oct 1932 | Box 145 \ 1 scan0025 | |
| The 1933 range of Mobilgreases and their recommended applications. | 6th Oct 1932 | Box 145 \ 1 scan0026 | |
| Follow-up letter to Mr. Hives confirming recommendations and offering special prices on Mobiloil. | 2nd Aug 1933 | Box 145 \ 1 scan0027 | |
| Letter quoting prices for Mobiloil lubricants following satisfactory tests and inclusion in recommendations for Rolls-Bentley cars. | 2nd Aug 1933 | Box 145 \ 1 scan0028 | |
| Letter from the Vacuum Oil Company, Limited concerning charges and credits for items. | 2nd Aug 1933 | Box 145 \ 1 scan0029 | |
| Publicity proposal from Price's Patent Candle and an inquiry about the oil used in the new Bentley. | 25th Aug 1933 | Box 145 \ 1 scan0030 | |
| Proposal to recommend specific oils for Bentley cars. | 31th Aug 1933 | Box 145 \ 1 scan0031 | |
| Confirming an inconclusive test of Mobiloil 'EP' in a Bentley axle due to contamination from another oil. | 4th Sep 1933 | Box 145 \ 1 scan0032 | |
| Letter from the Vacuum Oil Company to Mr. E. W. Hives to arrange a meeting in Derby. | 7th Sep 1933 | Box 145 \ 1 scan0033 | |
| Letter to Mr. Russell Sharp of Vacuum Oil Co. Ltd. regarding a meeting and the final decision on lubricants for the Bentley. | 8th Sep 1933 | Box 145 \ 1 scan0034 | |
| Telegram from Russell Sharp confirming an arrival time in Derby of one o'clock. | 12th Sep 1933 | Box 145 \ 1 scan0035 | |
| The choice of lubricating oils for the 3½ Litre Bentley. | 12th Sep 1933 | Box 145 \ 1 scan0036 | |
| Inclusion of Vacuum Oil Co. in the Bentley instruction book and considering other oil recommendations. | 19th Sep 1933 | Box 145 \ 1 scan0037 | |
| Clarifying the recommended oils for Bentley vehicles. | 20th Sep 1933 | Box 145 \ 1 scan0038 | |
| Selection, testing, and pricing of lubricants for Bentley cars. | 23th Sep 1933 | Box 145 \ 1 scan0039 | |
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