| Description | Date | Identifier | |
| Summary of fuel, oil, tyres, and performance data from a mileage test. | 10th Dec 1933 | Box 82 \ 1 scan0322 | |
| Confirming instructions for a car's return to Derby and a modification to its usage. | 10th Dec 1933 | Box 82 \ 1 scan0323 | |
| Test report detailing the load required to operate radiator shutters at various speeds. | 11th Dec 1933 | Box 82 \ 1 scan0324 | |
| Drawing showing a disconnected thermostat mechanism. | 11th Dec 1933 | Box 82 \ 1 scan0325 | |
| Drawing of radiator shutters in the fully open position with two indicating tubes attached. | 12th Dec 1933 | Box 82 \ 1 scan0326 | |
| From G.W.H. responding to queries about experimental features, specifically regarding a 10,000-mile report and piston knocks. | 12th Dec 1933 | Box 82 \ 1 scan0327 | |
| The insufficient sensitivity of the thermostat controlling the radiator shutters. | 13th Dec 1933 | Box 82 \ 1 scan0328 | |
| Arrangements for the final stage of a 15,000-mile vehicle test. | 15th Dec 1933 | Box 82 \ 1 scan0329 | |
| Various mechanical issues observed during a 10,000-mile test of the I.B.IV model. | 15th Dec 1933 | Box 82 \ 1 scan0330 | |
| Issues with an electrical petrol pump, petrol tank filling, and suspension control. | 15th Dec 1933 | Box 82 \ 1 scan0331 | |
| Return and required repairs for car 1.B.IV after completing over 14,000 miles in France. | 16th Dec 1933 | Box 82 \ 1 scan0332 | |
| Test report on a Bentley I.B.IV after 10,000 miles, detailing various mechanical and electrical faults. | 18th Dec 1933 | Box 82 \ 1 scan0333 | |
| Recommendations following a 10,000-mile test on the flywheel, clutch, servo, radiator, and thermostat. | 19th Dec 1933 | Box 82 \ 1 scan0334 | |
| Report discussing issues with a thermostatic unit, engine side trays, undershields, and brakes. | 19th Dec 1933 | Box 82 \ 1 scan0335 | |
| Technical report discussing brake performance issues and petrol pump valve sticking. | 15th Dec 1933 | Box 82 \ 1 scan0336 | |
| Issues with petrol tank filling and a new design for variable damping on Bentley vehicles. | 19th Dec 1933 | Box 82 \ 1 scan0337 | |
| 10,000-mile test report detailing issues with transmission groan, engine roughness, poor brakes, and a noisy rear axle. | 20th Dec 1933 | Box 82 \ 1 scan0338 | |
| List of components for a 10,000-mile road test on an Open Bentley 4-B-IV, detailing parts already fitted and others to be tested. | 16th Jan 1934 | Box 82 \ 2 scan0001 | |
| Outlining the specifications for a 10,000-mile test on an Open Bentley 4-B-IV. | 16th Jan 1934 | Box 82 \ 2 scan0002 | |
| Recurring bearing failure on the rear axle pinion of the 3½ Litre Bentley. | 30th Jan 1934 | Box 82 \ 2 scan0003 | |
| List of eleven proposed modifications to be tested on a vehicle. | 20th Jul 1934 | Box 82 \ 2 scan0004 | |
| List of specifications for a 10,000 miles test Bentley, broken down into engine and chassis components. | 20th Jul 1934 | Box 82 \ 2 scan0005 | |
| Numbered list of vehicle components and modifications with their associated reference numbers. | 24th Jan 1934 | Box 82 \ 2 scan0006 | |
| Modifications for a 4-B-IV Bentley undergoing a 10,000-mile test. | 24th Jan 1934 | Box 82 \ 2 scan0007 | |
| Requesting an update on the 10,000-mile test for a 3.5-Litre Bentley with a new type rear axle pinion bearing. | 30th Jan 1934 | Box 82 \ 2 scan0008 | |
| Rear axle pinion bearing failure on a 3.5-Litre Bentley and a proposed 10,000-mile test for a replacement. | 22th Jan 1934 | Box 82 \ 2 scan0009 | |
| Bentley 4-B-IV on a 10,000-mile test, concerning daily mileage and cold start performance. | 1st Feb 1934 | Box 82 \ 2 scan0010 | |
| Specification revision for Chassis No. B.3. Unit, detailing parts for the Servo Motor Mechanism and Front Brake Equalisers. | 12th Feb 1934 | Box 82 \ 2 scan0011 | |
| Failure of a pinion thrust bearing and subsequent plans for further testing. | 20th Feb 1934 | Box 82 \ 2 scan0012 | |
| Preliminary specification of new features to be incorporated into the next 10,000 miles Bentley test car. | 20th Feb 1934 | Box 82 \ 2 scan0013 | |
| Numbered list of vehicle modifications and features with associated scheme or part numbers. | 20th Feb 1934 | Box 82 \ 2 scan0014 | |
| Numbered list of modifications and new parts relating to braking, clutch, and engine components. | 20th Feb 1934 | Box 82 \ 2 scan0015 | |
| List of potential engine modifications and alternative designs under consideration. | 20th Feb 1934 | Box 82 \ 2 scan0016 | |
| Requesting a specification list of points for the next 10,000 miles Bentley car. | 21th Feb 1934 | Box 82 \ 2 scan0017 | |
| Confirming and rescheduling a meeting to discuss the specification for a 10,000 miles Bentley car. | 23th Feb 1934 | Box 82 \ 2 scan0018 | |
| Request for modifications to be fitted to the 4-B-IV 10,000 Miles Car. | 26th Feb 1934 | Box 82 \ 2 scan0019 | |
| Instruction to examine and potentially replace valves on a 10,000-mile car due to one being in poor condition. | 27th Feb 1934 | Box 82 \ 2 scan0020 | |
| The results of a 10,000-mile test on a Bentley 1V. B.4 and a proposal for a further test with new parts. | 27th Feb 1934 | Box 82 \ 2 scan0021 | |
| 10,000-mile test on a Bentley car. | 3rd Mar 1934 | Box 82 \ 2 scan0022 | |
| The chief items tested on a 4-B-IV Bentley after 10,000 miles in England. | 2nd Mar 1934 | Box 82 \ 2 scan0023 | |
| Performance and faults found in the servo, steering, brakes, and rear axle systems. | 2nd Mar 1934 | Box 82 \ 2 scan0024 | |
| The performance of hydraulic dampers, the electrical system, and Goodrich extra heavy 6-ply tyres. | 2nd Mar 1934 | Box 82 \ 2 scan0025 | |
| 10,000-mile test of a 4-B-IV Bentley, detailing the performance of the engine, pistons, clutch, and gearbox. | 5th Mar 1934 | Box 82 \ 2 scan0026 | |
| Technical report on the performance of the servo, steering, brakes, and rear axle. | 5th Mar 1934 | Box 82 \ 2 scan0027 | |
| The performance of hydraulic dampers, electrical system, and Goodrich tyres following a test. | 5th Mar 1934 | Box 82 \ 2 scan0028 | |
| Expressing disappointment that proposed improvements for the Bentley car have been deprioritized beyond the 'C' Series. | 1st Mar 1934 | Box 82 \ 2 scan0029 | |
| Arranging for the supply and fitting of a three-section exhaust system for car 4-B-IV. | 16th Mar 1934 | Box 82 \ 2 scan0030 | |
| Requesting the fitting of a Peregrine Gearbox, front axle examination, and re-lining of brakes. | 9th Apr 1934 | Box 82 \ 2 scan0031 | |
| Short memo requesting an update on the 10,000 Miles Trial for car 4-B-IV. | 9th Apr 1934 | Box 82 \ 2 scan0032 | |
| 10,000 miles trial on a Bentley, referencing a delayed report and the successful test of an axle thrust bearing. | 10th Apr 1934 | Box 82 \ 2 scan0033 | |
| Letter to G.W. Hancock in France discussing issues with a vehicle, including a 10,000-mile report, universal joint fouling, damping control, and high oil consumption. | 10th Apr 1934 | Box 82 \ 2 scan0034 | |
| 10,000 Miles Car, discussing previous reports and the decision to drop light alloy connecting rods. | 13th Apr 1934 | Box 82 \ 2 scan0035 | |
| Cover memo for a report from GWL on items tested during a 10,000-mile test in England on vehicle 4-B-IV. | 14th Apr 1924 | Box 82 \ 2 scan0036 | |
| Delayed report on vehicle 4.B.IV detailing the condition of various components. | 12th Apr 1934 | Box 82 \ 2 scan0037 | |
| 10,000-mile Bentley endurance test, evaluating the performance of engine components. | 11th Apr 1934 | Box 82 \ 2 scan0038 | |
| Test report on the performance of vehicle components including the clutch, propeller shaft, steering, gearbox, and servo. | 11th Apr 1934 | Box 82 \ 2 scan0039 | |
| Steering characteristics, a comparison of brake lining wear, and a rear axle bearing failure. | 11th Apr 1934 | Box 82 \ 2 scan0040 | |
| The performance of hydraulic dampers, the electrical system, and the instrument board. | 19th Apr 1934 | Box 82 \ 2 scan0041 | |
| Results of a 10,000-mile test on Aerolite pistons and proposing further testing. | 19th Apr 1934 | Box 82 \ 2 scan0042 | |
| Requesting information on when a Bentley car will be ready to start its 10,000 miles test. | 22th Mar 1934 | Box 82 \ 2 scan0043 | |
| The start date for a 10,000-mile test on a Bentley car. | 23th Mar 1934 | Box 82 \ 2 scan0044 | |
| Outlining proposed improvements for the 3 1/2 Litre Bentley to address known customer complaints. | 2nd May 1934 | Box 82 \ 2 scan0045 | |
| List of modifications and features for a car, including changes to the silencer, radiator, and frame. | 20th Feb 1934 | Box 82 \ 2 scan0046 | |
| Confirmation memo regarding gearbox modifications, including material changes and component hardening. | 3rd May 1934 | Box 82 \ 2 scan0047 | |
| Plan for the next 10,000 miles test car, a 3.5 Litre Bentley, and parts for the 'C' Series. | 5th May 1934 | Box 82 \ 2 scan0048 | |
| Production and delivery of controllable dampers for a 3 1/4 litre Bentley. | 7th May 1934 | Box 82 \ 2 scan0049 | |
| Modifications for a 10,000-mile test on a 4-B-IV Open Touring Bentley. | 16th May 1934 | Box 82 \ 2 scan0050 | |
| List of vehicle modifications and instructions for items such as brakes, headlamps, and dynamo. | 16th May 1934 | Box 82 \ 2 scan0051 | |
| Bentley Chassis 10,000 miles test car, indicating items instructed for production. | 10th Sep 1934 | Box 82 \ 2 scan0052 | |
| Replacement of an obsolete unit (4-B-IV) with an upgraded B.7 unit. | 23th May 1934 | Box 82 \ 2 scan0053 | |
| Instruction to alter records for Bentley Test Car No.5.B.IV, replacing the side spare wheel carrier with a stiffer design to prevent vibration. | 25th May 1934 | Box 82 \ 2 scan0054 | |
| Request to fit a steering wheel to an Open Bentley for 10,000 miles. | 6th Jun 1934 | Box 82 \ 2 scan0055 | |
| List of available modifications for the 10,000 Miles Test Car engine. | 6th Jun 1934 | Box 82 \ 2 scan0056 | |
| Numbered list of vehicle chassis modifications with reference numbers and handwritten annotations. | 6th Jun 1934 | Box 82 \ 2 scan0057 | |
| Numbered list of vehicle modifications and components with corresponding scheme numbers. | 6th Jun 1934 | Box 82 \ 2 scan0058 | |
| List of engine and chassis components for a development car intended for a 10,000-mile test. | 7th Jun 1934 | Box 82 \ 2 scan0059 | |
| List of five completed development points that could be implemented if designs were available. | 7th Jun 1934 | Box 82 \ 2 scan0060 | |
| Specification list for the 'Next 10,000 Miles Car', detailing engine and chassis components. | 7th Jun 1934 | Box 82 \ 2 scan0061 | |
| List of five completed development points for potential future designs. | 7th Jun 1934 | Box 82 \ 2 scan0062 | |
| The required improvements and development work for the next 10,000-mile Bentley car test. | 8th Jun 1934 | Box 82 \ 2 scan0063 | |
| Listing weight-saving components and noting a delay in the car's completion. | 8th Jun 1934 | Box 82 \ 2 scan0064 | |
| To HHC summarising the status and required work on three 10,000-mile test cars: a Phantom, a 20/25, and a Bentley. | 9th Jun 1934 | Box 82 \ 2 scan0065 | |
| Parts and modifications required for '10,000 miles' test cars, specifically a Phantom 28-EX and a 20/25 HP 21-G-IV. | 8th Jun 1934 | Box 82 \ 2 scan0066 | |
| Numbered list of technical notes and a query concerning various Bentley components. | 8th Jun 1934 | Box 82 \ 2 scan0067 | |
| List of parts for Bentley Chassis 5-B-IV, noting potential for conflicting instructions. | 9th Jun 1934 | Box 82 \ 2 scan0068 | |
| List of 18 numbered modifications and specifications for a project. | 9th Jun 1934 | Box 82 \ 2 scan0069 | |
| Questioning the use of dural connecting rods in a 10,000 miles test car after a breakage. | 7th Jun 1934 | Box 82 \ 2 scan0070 | |
| Current status and new features being installed on the 10,000 Miles Test Car 4-B-IV. | 12th Jun 1934 | Box 82 \ 2 scan0071 | |
| Final alterations, missing parts, and leaks for an engine after a 10,000-mile test. | 11th Jun 1934 | Box 82 \ 2 scan0072 | |
| Requesting an update on the restart of the Bentley 10,000 miles test, which was stopped due to connecting rod trouble. | 18th Jun 1934 | Box 82 \ 2 scan0073 | |
| Centrifugally cast bearings made from Brigramet Bearing Metal, discussing results and recommended casting parameters. | 19th Jun 1934 | Box 82 \ 2 scan0074 | |
| Providing an update on the Bentley 10,000 miles test, specifically regarding front axle machining. | 21th Jun 1934 | Box 82 \ 2 scan0075 | |
| Clutch component requests for a B-7 Unit 10,000-mile test. | 27th Jun 1934 | Box 82 \ 2 scan0076 | |
| Requesting the lagging of a front silencer and the fabrication of a new stainless steel version for a 10,000-mile test. | 2nd Jul 1934 | Box 82 \ 2 scan0077 | |
| Excessive brake wear on a Bentley 10,000 Miles Test vehicle using FB4A material. | 2nd Jul 1934 | Box 82 \ 2 scan0078 | |
| 10,000-mile Bentley test which confirmed rapid brake lining wear and proposed fitting a new FB4A lining to trials cars. | 3rd Jul 1934 | Box 82 \ 2 scan0079 | |
| Car's performance after arriving in France from Boulogne. | 11th Jun 1934 | Box 82 \ 2 scan0080 | |
| Petrol pump failures, bonnet rattles, and other issues observed during vehicle testing. | 11th Jun 1934 | Box 82 \ 2 scan0081 | |
| Vehicle performance, detailing issues with the steering, clutch, and brakes. | 11th Jun 1934 | Box 82 \ 2 scan0082 | |
| Vehicle braking and suspension performance, focusing on hydraulic dampers and pitching issues. | 11th Jun 1934 | Box 82 \ 2 scan0083 | |
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