| Description | Date | Identifier | |
| On dynamo output and vehicle performance metrics. | 11th Jun 1934 | Box 82 \ 2 scan0084 | |
| Road test report detailing impressions of the engine performance, body rattles, and over-run period. | 11th Jun 1934 | Box 82 \ 2 scan0085 | |
| Road test report detailing the performance of the steering, clutch, brakes, dampers, and dynamo. | 12th Jul 1934 | Box 82 \ 2 scan0086 | |
| Cover letter to G.W. Hancock in France, sending memos and specifications for chassis 4-B-IV. | 12th Jul 1934 | Box 82 \ 2 scan0087 | |
| 10,000-mile test of a Bentley, focusing on modifications to prevent clutch rattle and test new brake lining material. | 13th Jul 1934 | Box 82 \ 2 scan0088 | |
| Instructions for a 10,000-mile road test in France using leaded petrol, with notes on potential vehicle issues. | 16th Jul 1934 | Box 82 \ 2 scan0089 | |
| On the poor ride quality and mechanical issues of a Bentley tested on pavé roads in France. | 16th Jul 1934 | Box 82 \ 2 scan0090 | |
| Test report on radiator efficiency at various speeds and a note on brake shudder. | 17th Jul 1934 | Box 82 \ 2 scan0091 | |
| New intermediate exhaust expansion box made of Staybright Steel. | 17th Jul 1934 | Box 82 \ 2 scan0092 | |
| Request to prepare and despatch parts to France for car LeC.3830 to fix a rattling bonnet. | 17th Jul 1934 | Box 82 \ 2 scan0093 | |
| Letter from France regarding petrol availability, cross member observations, and brake adjustments. | 18th Jul 1934 | Box 82 \ 2 scan0094 | |
| Letter discussing Bentley valve clearance settings for Continental conditions and arranging tests in France. | 20th Jul 1934 | Box 82 \ 2 scan0095 | |
| Telegram from Grylls to Hancock regarding a spare crinkly plate servo. | 20th Jul 1934 | Box 82 \ 2 scan0096 | |
| Road test report from France comparing the performance of controllable dampers on various road conditions. | 20th Jul 1934 | Box 82 \ 2 scan0097 | |
| Test report detailing vehicle ride quality and handling issues over pavé and undulating surfaces. | 21th Jul 1934 | Box 82 \ 2 scan0098 | |
| Leaning rear cross member behind the gearbox, identifying a structural weakness and proposing a solution. | 21th Jul 1934 | Box 82 \ 2 scan0099 | |
| From France detailing vehicle issues including fuel regulations, valve settings, brake problems, and crankshaft period adjustments. | 22th Jul 1934 | Box 82 \ 2 scan0100 | |
| Request to dispatch a front axle and a pair of road springs to Hancock in France. | 23th Jul 1934 | Box 82 \ 2 scan0101 | |
| Telegram from Chateauroux reporting another valve spring failure and requesting more. | 24th Jul 1934 | Box 82 \ 2 scan0102 | |
| Letter dispatching an axle, springs, and radiator for testing, and discussing issues with a crankshaft damper, silencer, and oil leak. | 24th Jul 1934 | Box 82 \ 2 scan0103 | |
| 5,000-mile report on engine 4 B IV, detailing performance and component wear. | 24th Jul 1934 | Box 82 \ 2 scan0104 | |
| The performance and modifications of carburettors, spring drive damper, and flywheel/clutch components. | 24th Jul 1934 | Box 82 \ 2 scan0105 | |
| The mileage performance of pedals, engine mounting, gearbox, dampers, servo motor, and propeller shaft. | 24th Jul 1934 | Box 82 \ 2 scan0106 | |
| Technical report on the performance of vehicle dampers, steering, and axle components. | 24th Jul 1934 | Box 82 \ 2 scan0107 | |
| Condition report on the rear axle, brakes, and road springs. | 24th Jul 1934 | Box 82 \ 2 scan0108 | |
| Technical report on the performance and condition of various vehicle components. | 24th Jul 1934 | Box 82 \ 2 scan0109 | |
| The performance and issues with a vehicle's starter motor, dynamo, various lamps, and battery. | 24th Jul 1934 | Box 82 \ 2 scan0110 | |
| Vehicle performance, component condition, and measurements. | 25th Jul 1934 | Box 82 \ 2 scan0111 | |
| A wire received regarding a valve spring failure on a Bentley and the subsequent request for replacements. | 25th Jul 1934 | Box 82 \ 2 scan0112 | |
| Letter to G.W. Hancock regarding vehicle performance, referencing shutters, brakes, and Bentley parts. | 25th Jul 1934 | Box 82 \ 2 scan0113 | |
| Letter from a customer detailing clutch slipping issues and the experiments conducted to resolve them, along with a note on axle noise. | 26th Jul 1934 | Box 82 \ 2 scan0114 | |
| Telegram from Chateauroux reporting broken valve springs and urgently requesting stronger replacements for car 21 G IV. | 26th Jul 1934 | Box 82 \ 2 scan0115 | |
| Specification list of parts to be fitted to the next Bentley chassis and engine based on 10,000 miles of testing. | 26th Jul 1934 | Box 82 \ 2 scan0116 | |
| List of technical updates and a note regarding improvements for the Bentley 6 chassis. | 26th Jul 1934 | Box 82 \ 2 scan0117 | |
| Specification of new parts fitted to the 4-B-IV 10,000 miles car. | 26th Jul 1934 | Box 82 \ 2 scan0118 | |
| Numbered list of engineering modifications with their implementation status. | 26th Jul 1934 | Box 82 \ 2 scan0119 | |
| List of numbered components with handwritten notes indicating whether they are standard or not, and other observations. | 26th Jul 1934 | Box 82 \ 2 scan0120 | |
| Telegram received by telephone requesting urgent replacement of broken valve springs with stronger ones. | 26th Jul 1934 | Box 82 \ 2 scan0121 | |
| Bentley valve spring failures and a request for stronger replacements. | 26th Jul 1934 | Box 82 \ 2 scan0122 | |
| Vehicle modifications and faults related to shutters, axle, brakes, crankshaft, cooling, and headlamps. | 27th Jul 1934 | Box 82 \ 2 scan0123 | |
| Criticizing an individual named H. West and reporting an inaccurate speedometer. | 28th Jul 1934 | Box 82 \ 2 scan0124 | |
| Letter addressing reports on car component issues including clutches, timing gears, and radiators. | 28th Jul 1934 | Box 82 \ 2 scan0125 | |
| The completion of a 10,000-mile test and the subsequent investigations into issues like timing gear rattle and S.U. pump failure. | 29th Jul 1934 | Box 82 \ 2 scan0126 | |
| Letter to Mr. Hancock confirming the despatch of a set of Bentley single valve springs. | 30th Jul 1934 | Box 82 \ 2 scan0127 | |
| Arrangements for a test drive of 10,000-mile cars in France, particularly the Bentley. | 31th Jul 1934 | Box 82 \ 2 scan0128 | |
| Letter discussing the testing of an anti-rattle device on a Bentley synchromesh cam and gearbox. | 31th Jul 1934 | Box 82 \ 2 scan0129 | |
| Seeking clarification on conflicting information regarding the testing of a dropped crossmember on chassis 4-B-IV. | 1st Aug 1934 | Box 82 \ 2 scan0130 | |
| Letter regarding the dispatch and intentional modification of petrol pump diaphragms. | 1st Aug 1934 | Box 82 \ 2 scan0131 | |
| 10,000-mile report on engine unit B7, detailing performance and component conditions. | 1st Aug 1934 | Box 82 \ 2 scan0132 | |
| Inspection report on the condition of various engine components following testing. | 1st Aug 1934 | Box 82 \ 2 scan0133 | |
| Technical report on the performance and wear of the flywheel, clutch, pedals, engine mounting, gearbox, and hydraulic damper. | 1st Aug 1934 | Box 82 \ 2 scan0134 | |
| Performance, wear, and modifications of various vehicle components after mileage testing. | 1st Aug 1934 | Box 82 \ 2 scan0135 | |
| Vehicle component condition and performance report after extended mileage. | 1st Aug 1934 | Box 82 \ 2 scan0136 | |
| The condition and performance of vehicle components including springs, wheels, radiator, exhaust, and electrical systems. | 1st Aug 1934 | Box 82 \ 2 scan0137 | |
| The performance and issues with various electrical components including pumps, starter, dynamo, and lamps. | 1st Aug 1934 | Box 82 \ 2 scan0138 | |
| Battery, ignition plug, and instrument performance, with acceleration test results for different tyres. | 1st Aug 1934 | Box 82 \ 2 scan0139 | |
| Performance data and specifications for an Open Touring Car, detailing weight, speed, temperatures, and tyre wear. | 2nd Aug 1934 | Box 82 \ 2 scan0140 | |
| Radiator weight differences and valve clearance specifications. | 2nd Aug 1934 | Box 82 \ 2 scan0141 | |
| Telegram reporting a broken offside pillar windscreen on Hives' car and requesting a new one be sent. | 23th Aug 1933 | Box 82 \ 2 scan0142 | |
| Telegram asking for clarification on the term 'offside' in relation to the steering wheel side. | 2nd Aug 1934 | Box 82 \ 2 scan0143 | |
| Telegram requesting a replacement offside windscreen pillar for someone named Hancock. | 2nd Aug 1934 | Box 82 \ 2 scan0144 | |
| Clarifying the testing and current status of a dropped cross member for chassis 4-B-IV. | 2nd Aug 1934 | Box 82 \ 2 scan0145 | |
| Report from France detailing a broken windscreen pillar and a subsequent failure of a rear axle pinion shaft. | 3rd Aug 1934 | Box 82 \ 2 scan0146 | |
| Possible explanation for broken valve springs related to insufficient counterbore diameter. | 3rd Aug 1934 | Box 82 \ 2 scan0147 | |
| Telegram regarding body number 3603 from coachbuilder Park Ward. | 3rd Aug 1934 | Box 82 \ 2 scan0148 | |
| Telegram reporting a broken rear axle pinion inner bearing shaft on car 4B4 and requesting a new pinion. | 3rd Aug 1934 | Box 82 \ 2 scan0149 | |
| Letter detailing development progress on the 'Spectre' engine, a four-bearing crank engine, and synchro-mesh gearbox issues. | 4th Aug 1934 | Box 82 \ 2 scan0150 | |
| Communication regarding car testing, parts dispatch, and comparison with competitor vehicles. | 4th Aug 1934 | Box 82 \ 2 scan0151 | |
| Letter detailing the status of Hancock's Screen, the Spectre Body, and the Ulster Car projects. | 4th Aug 1934 | Box 82 \ 2 scan0152 | |
| With a diagram showing minimum wing width and a message concerning photographs of a car model. | 4th Aug 1934 | Box 82 \ 2 scan0153 | |
| Hand-drawn sketch of a mechanical assembly with annotations. | 5th Aug 1934 | Box 82 \ 2 scan0154 | |
| Letter from France investigating recurring valve spring failures on a 4 B IV model, concluding the cause is bottom coil surging. | 5th Aug 1934 | Box 82 \ 2 scan0155 | |
| From Chateauroux, France, detailing vehicle repairs and test results for a Bentley, a Cadillac, and car 28 EX. | 6th Aug 1934 | Box 82 \ 2 scan0156 | |
| Confirming receipt of 5 Special INDIA tyres from Glasgow. | 6th Aug 1934 | Box 82 \ 2 scan0157 | |
| Letter to a customer regarding the replacement and fitting of a broken windscreen stanchion. | 8th Aug 1934 | Box 82 \ 2 scan0158 | |
| Fitting a new pinion to the axle of vehicle 4 B 1V and subsequent testing in France. | 8th Aug 1934 | Box 82 \ 2 scan0159 | |
| List of parts despatched to G.W. Hancock. | 8th Aug 1934 | Box 82 \ 2 scan0160 | |
| List of parts despatched to G.W. Hancock. | 8th Aug 1934 | Box 82 \ 2 scan0161 | |
| Letter discussing parts testing, modifications, and car returns for Bentley, 28-EX and 20/25 models. | 8th Aug 1934 | Box 82 \ 2 scan0162 | |
| Test results for synchro mesh spring load, radiator mounting, and exhaust valve clearance. | 8th Aug 1934 | Box 82 \ 2 scan0163 | |
| Test report on an experimental Bentley's 'ride control' system in the company of Mr. George Hancock. | 9th Aug 1934 | Box 82 \ 2 scan0164 | |
| Technical memorandum discussing the effectiveness and issues with the 'ride control' system on a Bentley, with proposed solutions. | 9th Aug 1934 | Box 82 \ 2 scan0165 | |
| Test report on road springs and a traverse lean axle conducted on rough roads around Paris. | 15th Aug 1934 | Box 82 \ 2 scan0166 | |
| Steering issues caused by axle weakness and a failed attempt to fit a new cross member. | 15th Aug 1934 | Box 82 \ 2 scan0167 | |
| Dismantling of a damper, the discovery of a broken centre plate, and the plan to source a new part. | 15th Aug 1934 | Box 82 \ 2 scan0168 | |
| Sketch illustrating the effect of weight on different types of car axles. | 10th Aug 1934 | Box 82 \ 2 scan0169 | |
| Telegram reporting on vehicle component testing, including radiator, axle, bonnet performance, and valve bounce. | 10th Aug 1934 | Box 82 \ 2 scan0170 | |
| Trials car steering, axle performance, and a solution for wing movement trouble. | 16th Aug 1934 | Box 82 \ 2 scan0171 | |
| Report from France detailing engine bearing and valve spring failures, and difficulties with gearbox repairs on a test car. | 20th Aug 1934 | Box 82 \ 2 scan0172 | |
| Telegram reporting an engine failure with metal found in the bottom half and broken connecting rods. | 20th Aug 1934 | Box 82 \ 2 scan0173 | |
| Telegram regarding a broken down car (4-B-4) requesting parts and instructions. | 21th Aug 1934 | Box 82 \ 2 scan0174 | |
| Test report detailing adjustments and findings on valve clearance, axle fitting, and clutch judder on various test cars. | 21th Aug 1934 | Box 82 \ 2 scan0175 | |
| Short typed memo regarding the status of car 28-EX, noting it is being held for adjustments. | 22th Aug 1934 | Box 82 \ 2 scan0176 | |
| Correspondence regarding a telegram about a Bentley complaint and a re-erected engine. | 22th Aug 1934 | Box 82 \ 2 scan0177 | |
| Letter regarding a broken windscreen stanchion on vehicle 1-B-4, explaining the inability to provide a spare. | 25th Aug 1934 | Box 82 \ 2 scan0178 | |
| Multi-day performance chart tracking average speed, temperatures, and petrol consumption, with readings taken every 25 miles. | 14th Jul 1934 | Box 82 \ 2 scan0179 | |
| Multi-day vehicle performance log graphing water, oil, and air temperatures against mileage. | 14th Jul 1934 | Box 82 \ 2 scan0180 | |
| Performance and temperature chart from a multi-day vehicle test, logging readings every 25 miles. | 14th Jul 1934 | Box 82 \ 2 scan0181 | |
| Graph chart logging vehicle performance metrics including speed, consumption and temperatures over three days. | 14th Jul 1934 | Box 82 \ 2 scan0182 | |
| Log sheet graphing vehicle performance metrics such as temperature, speed, and petrol consumption over three days. | 14th Jul 1934 | Box 82 \ 2 scan0183 | |
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