| Description | Date | Identifier | |
| Typed letter responding to a telegram regarding a low oil pressure issue on model B.35.KU. | 5th Nov 1937 | Box 114 \ 3 scan0166 | |
| Engine test performance metrics and the condition of the bearings after stripping the engine. | 29th Oct 1937 | Box 114 \ 3 scan0167 | |
| Sale and naming of large capacity oil pumps for Bentley cars. | 29th Oct 1937 | Box 114 \ 3 scan0168 | |
| Correcting a misunderstanding about charging for large capacity oil pumps on Bentley cars. | 27th Oct 1937 | Box 114 \ 3 scan0169 | |
| Letter from Aubert & Dural regarding the re-nitriding process and hardness testing of a Bentley crankshaft. | 27th Oct 1937 | Box 114 \ 3 scan0170 | |
| Material specifications and treatment details for a Bentley V.C.M. Crankshaft. | 3rd Dec 1936 | Box 114 \ 3 scan0171 | |
| Badly worn and over-oiling cylinder block from a Bentley, highlighting issues with boring and honing methods. | 3rd Dec 1936 | Box 114 \ 3 scan0172 | |
| Analysis of customer complaints regarding excessive oil consumption and over-oiling in Bentley chassis. | 1st Sep 1936 | Box 114 \ 3 scan0173 | |
| Continued note on the inability to test for improvements due to the bedding-in period for piston rings. | 1st Sep 1936 | Box 114 \ 3 scan0174 | |
| Need for more detailed data to investigate excessive oil consumption and overoiling issues on Bentley cars. | 31th Aug 1936 | Box 114 \ 3 scan0175 | |
| Faulty repair of a connecting rod and bearings from a 4 1/4-litre chassis. | 15th Oct 1937 | Box 114 \ 3 scan0176 | |
| The condition of engine bearings, noting issues with insufficient clearance. | 6th Oct 1937 | Box 114 \ 3 scan0177 | |
| The wear measurements of a set of Bentley Aerolite pistons after mileage. | 6th Oct 1937 | Box 114 \ 3 scan0178 | |
| The supply of Bentley pistons and issues with oil consumption. | 21th Sep 1937 | Box 114 \ 3 scan0179 | |
| Query regarding the taper measurement on newly received Bentley pistons. | 12th Jun 1937 | Box 114 \ 3 scan0180 | |
| Seized piston in a Bentley chassis, discussing potential causes, scuffing on other pistons, and recommendations for running-in procedures post-rebore. | 15th Jul 1938 | Box 114 \ 3 scan0181 | |
| Outlining the process for sending replacement pistons to be tin-coated. | 1st Jul 1938 | Box 114 \ 3 scan0182 | |
| The running-in of Bentley pistons after a rebore to prevent scoring and seizing. | 27th Jun 1938 | Box 114 \ 3 scan0183 | |
| The return of a stock of Bentley tin-coated pistons for coating. | 28th Jun 1938 | Box 114 \ 3 scan0184 | |
| Holding back correspondence regarding pistons to avoid an argument, and requesting a meeting about 'Complaint' sheets. | 1st Dec 1937 | Box 114 \ 3 scan0185 | |
| Clarifying responsibility for the supply of new type Bentley pistons to Depots. | 30th Nov 1937 | Box 114 \ 3 scan0186 | |
| Clarifying details about a fractured piston on a 4 1/4 Litre Bentley, chassis B-84-FB, and the introduction of a new taper skirt piston. | 29th Nov 1937 | Box 114 \ 3 scan0187 | |
| Piston types and oil consumption, including correspondence about parts supply and modifications. | 21th Sep 1937 | Box 114 \ 3 scan0188 | |
| Communication issues and instructions regarding the fitting of a new type of piston at the Kingsbury Depot. | 26th Nov 1937 | Box 114 \ 3 scan0189 | |
| Investigating the supply of incorrect 4¼ Litre Bentley pistons. | 26th Nov 1937 | Box 114 \ 3 scan0190 | |
| Piston supply issues for the 4 1/2 Litre Bentley, including an engine seizure and reverting to original specifications. | 24th Nov 1937 | Box 114 \ 3 scan0191 | |
| Notice regarding the correct type of replacement pistons for 4¼ Litre Bentley models. | 16th Oct 1937 | Box 114 \ 3 scan0192 | |
| Complaints about supplying the wrong type of Bentley Pistons. | 24th Nov 1937 | Box 114 \ 3 scan0193 | |
| Supply of unusable Bentley pistons and instructions for depots. | 23th Nov 1937 | Box 114 \ 3 scan0194 | |
| Manufacturing methods and performance of piston rings for Bentley chassis. | 18th Mar 1937 | Box 114 \ 3 scan0195 | |
| Fitting new Vellumoid washers to the cylinder covers of 25/30 HP and Bentley chassis. | 17th Aug 1937 | Box 114 \ 3 scan0196 | |
| The supply and fitting of Vellumoid washers for the cylinder cover on 25/30 HP & Bentley chassis. | 12th Aug 1937 | Box 114 \ 3 scan0197 | |
| Report regarding the deterioration of enamel on cylinder blocks, particularly on 25/30 and Bentley models, due to a chemical in the packing. | 22th Jun 1937 | Box 114 \ 3 scan0198 | |
| Instruction to replace 'Gascoid' joint washers with 'Vellumoid' for 25/30 HP & Bentley Chassis cylinder blocks. | 28th Jul 1937 | Box 114 \ 3 scan0199 | |
| Change in jointing material from 'Gascoid' back to 'Vellumoid' for Bentley & 25/30.HP cylinder blocks. | 28th Jun 1937 | Box 114 \ 3 scan0200 | |
| Investigation into peeling enamel on the cylinder heads of Bentley & 25/30.HP engines. | 25th Jun 1937 | Box 114 \ 3 scan0201 | |
| Design and use of a side spare wheel carrier for the B.4. model, comparing it to the Peregrine. | 1st Apr 1933 | Box 114 \ 3 scan0202 | |
| Fitting Peregrine side spare wheel carriers onto a Bentley car. | 14th Jun 1933 | Box 114 \ 3 scan0203 | |
| Drawbacks and cost of fitting a side spare wheel carrier for the 3.5 Litre Bentley. | 26th Jun 1933 | Box 114 \ 3 scan0204 | |
| Testing and feasibility of fitting a side spare wheel carrier to Bentley cars. | 18th Dec 1933 | Box 114 \ 3 scan0205 | |
| Design and mounting of the Wraith II side spare wheel carrier. | 30th Jun 1936 | Box 114 \ 3 scan0206 | |
| Design proposal for a cheaper side spare wheel carrier for the Phantom III, detailing seven modifications. | 28th Oct 1936 | Box 114 \ 3 scan0207 | |
| Requesting a new and improved side spare wheel carrier for a Bentley be manufactured and tested. | 30th Oct 1936 | Box 114 \ 3 scan0208 | |
| New, cheaper, and simplified design for the Phantom III side wheel carrier. | 22th Nov 1936 | Box 114 \ 3 scan0209 | |
| Need to bump test a side spare wheel carrier for a wide entrance Bentley. | 7th Jan 1937 | Box 114 \ 3 scan0210 | |
| Test report on a Bentley side spare wheel carrier, detailing a durability test and weight comparison. | 8th Jan 1937 | Box 114 \ 3 scan0211 | |
| Proposal to adopt a new, simpler, and cheaper side spare wheel carrier for Bentley cars. | 9th Jan 1937 | Box 114 \ 3 scan0212 | |
| Agreeing to a new side spare wheel carrier for Bentley, pending satisfactory tests. | 12th Jan 1937 | Box 114 \ 3 scan0213 | |
| Testing and standardisation of a new spare wheel carrier for a Bentley. | 26th Feb 1937 | Box 114 \ 3 scan0214 | |
| Modification, testing, and cost of a Bentley side spare wheel carrier. | 3rd Mar 1937 | Box 114 \ 3 scan0215 | |
| The cost implications and production delay of introducing a lightened carrier. | 26th May 1937 | Box 114 \ 3 scan0216 | |
| The failure of side spare wheel carrier brackets for the Wraith III, with proposed design modifications. | 26th May 1937 | Box 114 \ 3 scan0217 | |
| Failure and proposed redesign of a cheapened side spare wheel carrier for the Phantom III. | 27th May 1937 | Box 114 \ 3 scan0218 | |
| Secret memo discussing issues with excessive movement and vibration from the spare wheel mounting on the Wraith. | 18th Jun 1937 | Box 114 \ 3 scan0219 | |
| Unsatisfactory spare wheel mounting on the Wraith and requesting test results for design modification. | 21th Jun 1937 | Box 114 \ 3 scan0220 | |
| Proposed modification to the Wraith III side spare wheel carrier bracket to correct an alignment issue. | 24th Jun 1937 | Box 114 \ 3 scan0221 | |
| Design, stiffness and failures of the Wraith side spare wheel carrier. | 2nd Jul 1937 | Box 114 \ 3 scan0222 | |
| Table of comparative chassis deflection measurements under increasing loads for various models and configurations. | 5th Aug 1937 | Box 114 \ 3 scan0223 | |
| Announcing the withdrawal of the standardisation sheet for the Bentley chassis side spare wheel carrier. | 5th Aug 1937 | Box 114 \ 3 scan0224 | |
| Withdrawal of the standardisation sheet for a Bentley side spare wheel carrier due to costing errors. | 5th Aug 1937 | Box 114 \ 3 scan0225 | |
| The design modification of a side spare wheel carrier for the Bentley 111. | 4th Sep 1937 | Box 114 \ 3 scan0226 | |
| The design of a Bentley 50 wheelcase and its oil supply nozzle. | 18th Mar 1938 | Box 114 \ 3 scan0227 | |
| Scheme detailing a new support tube and bracket for a spare wheel carrier on the B.50 Bentley. | 4th May 1938 | Box 114 \ 3 scan0228 | |
| Modifications to the spare wheel carrier fixings for Bentley 111 and 50 models due to fractures. | 14th Jun 1938 | Box 114 \ 3 scan0229 | |
| Scheme for a side spare wheel carrier to accommodate wire wheels with American type front wings for a Bentley. | 12th Nov 1938 | Box 114 \ 3 scan0230 | |
| The production and pricing of a spare wheel cover for various car models. | 17th Aug 1939 | Box 114 \ 3 scan0231 | |
| Memo outlining three technical points following a visit to Squash Court. | 29th Mar 1940 | Box 114 \ 3 scan0232 | |
| Scheme for a rear-mounted spare wheel, with references to competitor car models. | 4th Apr 1940 | Box 114 \ 3 scan0233 | |
| Design investigation for the luggage boot and spare wheel on the Rippletto model. | 4th Apr 1940 | Box 114 \ 3 scan0234 | |
| The specification of a spare wheel handle, noting a specified part cannot be used and production needs to be instructed for an alternative. | 7th Apr 1930 | Box 114 \ 3 scan0235 | |
| Parts and modifications for the LH Senior Range spare wheel carrier and frame. | 15th Apr 1940 | Box 114 \ 3 scan0236 | |
| Proposed modifications for a propaganda tour to Nairobi, covering tyres, ground clearance, cooling and fuel systems. | 22th Jan 1937 | Box 114 \ 4 scan0001 | |
| Necessary vehicle modifications for a Mr. Symons, concerning the carburetter, clutch, tyres, and bodywork. | 22th Jan 1937 | Box 114 \ 4 scan0002 | |
| Specifications for two tyre sizes, including effective circumference, width, rim size, and revolutions per mile. | 22th Jan 1937 | Box 114 \ 4 scan0003 | |
| Proposing a propaganda tour from London to Nairobi to gain publicity for the Phantom III car. | 1st Feb 1937 | Box 114 \ 4 scan0004 | |
| Proposal outlining the method, route, and publicity strategy for a trans-African motor journey. | 1st Feb 1937 | Box 114 \ 4 scan0005 | |
| Proposal outlining the publicity, cost, and preparation for a journey using a Phantom III car. | 25th Jan 1937 | Box 114 \ 4 scan0006 | |
| Modifications for car 34-EX for a proposed tour to Nairobi. | 25th Jan 1937 | Box 114 \ 4 scan0007 | |
| The arrangement of a qualified mechanic for Mr. Symons' journey and scheduling a meeting. | 25th Jan 1937 | Box 114 \ 4 scan0008 | |
| List of vehicle specifications, equipment, and tools for an expedition or long-distance journey. | 25th Jan 1937 | Box 114 \ 4 scan0009 | |
| Typed list of vehicle spare parts, with a handwritten note '(as taken on Morris)'. | 25th Jan 1937 | Box 114 \ 4 scan0010 | |
| Typed and handwritten list of vehicle spare parts with queries. | 27th Jan 1937 | Box 114 \ 4 scan0011 | |
| Alterations to fit a second spare wheel for the 'Nairobi Tour' car and enclosing a photograph of a difficult track. | 27th Jan 1937 | Box 114 \ 4 scan0012 | |
| Addressed to Hamilton Francobrit in Levallois-Perret, France, requesting the return of a letter. | 27th Jan 1937 | Box 114 \ 4 scan0013 | |
| Requesting an employee to return to Derby for a projected press trip on the Phantom III chassis. | 27th Jan 1937 | Box 114 \ 4 scan0014 | |
| Driver assignments and vehicle availability for a press trip and other testing purposes. | 27th Jan 1937 | Box 114 \ 4 scan0015 | |
| Letter from Dunlop Rubber Co. providing recommendations on tyre inflation pressures for driving on different types of sand. | 29th Jan 1937 | Box 114 \ 4 scan0016 | |
| Letter to Mr. Humphrey Symons regarding tyre inflation pressures for driving on sand. | 29th Jan 1937 | Box 114 \ 4 scan0017 | |
| Tables detailing tyre performance characteristics including load, pressure, and use on different surfaces. | 29th Jan 1937 | Box 114 \ 4 scan0018 | |
| Specification of modifications for a car preparing for an overland Press tour to Nairobi. | 29th Jan 1937 | Box 114 \ 4 scan0019 | |
| Outlining required modifications for a car's cooling, speedometer, and air intake, with a completion deadline. | 29th Jan 1937 | Box 114 \ 4 scan0020 | |
| Letter requesting the fitting of additional thermometers for a 'Nairobi Run' to gather temperature data. | 30th Jan 1937 | Box 114 \ 4 scan0021 | |
| Letter discussing vehicle instrumentation and carburetter settings required for high-altitude driving. | 30th Jan 1937 | Box 114 \ 4 scan0022 | |
| Calculations for probable tyre loading on vehicle 34E.X. | 1st Feb 1937 | Box 114 \ 4 scan0023 | |
| Requesting the manufacture and fitting of a water tank to car 34-EX for its London-Nairobi tour. | 1st Feb 1937 | Box 114 \ 4 scan0024 | |
| Urgent internal memo requesting parts and instruments for the Nairobi Run car. | 1st Feb 1937 | Box 114 \ 4 scan0025 | |
| List of electrical equipment and spares required for the 34 Ex. Nairobi Run. | 1st Feb 1937 | Box 114 \ 4 scan0026 | |
| Relining the rear brakes on car 34 EX due to wear before a severe braking test. | 2nd Feb 1937 | Box 114 \ 4 scan0027 | |
| List of modifications to be carried out on Unit No. 7 34 EX. | 2nd Feb 1937 | Box 114 \ 4 scan0028 | |
| Mounting a petrol pump on car 34 EX on a production rubber mounting and fitting a bracket to the frame. | 2nd Feb 1937 | Box 114 \ 4 scan0029 | |
| | | | |
