| Description | Date | Identifier | |
| Clutch and flywheel performance issues with 'No.6 Material' and subsequent modifications. | 14th Jun 1936 | Box 91 \ 1 scan0394 | |
| Performance report on various vehicle components including the exhaust, radiator, bonnet, and bumpers. | 7th Jun 1935 | Box 91 \ 1 scan0395 | |
| Condition and performance report on the engine coupling, gearbox, and gearbox suspension. | 7th Jun 1935 | Box 91 \ 1 scan0396 | |
| The performance and faults found in the servo and steering systems. | 7th Jun 1935 | Box 91 \ 1 scan0397 | |
| The performance and issues with the propeller shaft, rear axle, and rear braking system. | 7th Jun 1935 | Box 91 \ 1 scan0398 | |
| The performance of hand brakes and front brakes, including materials, adjustments, and issues during testing. | 7th Jun 1935 | Box 91 \ 1 scan0399 | |
| The condition of road wheels, stabilizer, axles, and springs after mileage testing. | 10th Sep 1916 | Box 91 \ 1 scan0400 | |
| Front suspension damper issues, including wheel wobble, buffer clearances, oil leaks, and observations on the wheel carrier and exhaust system. | 10th Sep 1916 | Box 91 \ 1 scan0401 | |
| The performance of shock dampers, petrol tank, petrol filter, and electrical components. | 1st Jan 1918 | Box 91 \ 1 scan0402 | |
| The performance of and issues with various vehicle components, including the radio aerial, starter motor, dynamo, and distributors. | 1st Jan 1918 | Box 91 \ 1 scan0403 | |
| The performance and issues with various vehicle components including horns, gauges, wipers and lamps. | 19th Apr 1919 | Box 91 \ 1 scan0404 | |
| Park Ward Saloon (Close-Coupled) detailing bodywork condition, hydraulic jack issues, and performance statistics. | 18th Apr 1940 | Box 91 \ 1 scan0405 | |
| Prop-shaft vibration and exhaust boom issues found in completed Phantom III cars. | 18th Aug 1936 | Box 91 \ 1 scan0406 | |
| Unpleasant body boom feature in a trials car at 30 m.p.h. | 18th Aug 1936 | Box 91 \ 1 scan0407 | |
| Letter to General Motors responding to a request for literature and photographs of products. | 20th Aug 1936 | Box 91 \ 1 scan0408 | |
| The Phantom III flywheel balancing scheme, recommending it for immediate production without further testing. | 21th Aug 1936 | Box 91 \ 1 scan0409 | |
| New Packard-type crankshaft and an improved Bentley-style exhaust valve for the Phantom III Engine. | 25th Aug 1936 | Box 91 \ 1 scan0410 | |
| The general car position, focusing on Phantom III testing, clutch issues, and problems with smoky exhaust and oiled-up spark plugs. | 28th Aug 1936 | Box 91 \ 1 scan0411 | |
| Exhaust boom, valve springs, and connecting rod bearing issues and potential solutions. | 28th Aug 1936 | Box 91 \ 1 scan0412 | |
| Progress report on tests and investigations for oil consumption, radiator appearance, cylinder heads, carburation, and petrol pumps. | 28th Aug 1936 | Box 91 \ 1 scan0413 | |
| 15,000-mile test in France, detailing ongoing developments for the 20/25 HP model. | 28th Aug 1936 | Box 91 \ 1 scan0414 | |
| Development and testing for noisy petrol pumps, smoother engines, improved idling, and braking systems. | 28th Aug 1936 | Box 91 \ 1 scan0415 | |
| 15,000-mile test of a Bentley 6-B-IV in France, detailing issues and solutions for the brakes and clutch. | 28th Aug 1936 | Box 91 \ 1 scan0416 | |
| Various vehicle development issues including sparking plugs, oil consumption, brakes, engine mounting, and suspension. | 28th Aug 1936 | Box 91 \ 1 scan0417 | |
| Experiments on tyres, body improvements, engine development, and suspension systems. | 28th Aug 1936 | Box 91 \ 1 scan0418 | |
| Performance upgrades and limitations of the Tourist Trophy Car ahead of a race in Ulster. | 28th Aug 1936 | Box 91 \ 1 scan0419 | |
| Request to make 24 Phantom III Bottom Washers. | 8th Sep 1936 | Box 91 \ 1 scan0420 | |
| Broken Phantom III horn bracket with a sketch of the failure. | 9th Sep 1936 | Box 91 \ 1 scan0421 | |
| Customer complaints for the Phantom III, focusing on steering, gearbox, and clutch issues. | 28th Sep 1936 | Box 91 \ 1 scan0422 | |
| Minor technical troubles and development updates on various car components. | 28th Sep 1936 | Box 91 \ 1 scan0423 | |
| Vehicle testing issues covering radiator appearance, carburation, petrol vapour lock, tyre noise, and silent tappets. | 28th Sep 1936 | Box 91 \ 1 scan0424 | |
| Progress report on the 25/30 HP model, covering testing, steering, oil consumption, clutch, and idling improvements. | 28th Sep 1936 | Box 91 \ 1 scan0425 | |
| Test report on Bentley vehicles covering engine bearings, brakes, clutch, and fuel issues. | 28th Sep 1936 | Box 91 \ 1 scan0426 | |
| Progress report on the development of various automotive components including the exhaust, suspension, body, engine, and rear axle. | 28th Sep 1936 | Box 91 \ 1 scan0427 | |
| Modifications and required parts for the Phantom III chassis front brakes. | 6th Oct 1936 | Box 91 \ 1 scan0428 | |
| Part number replacements and a request to produce two sets of new parts for trial. | 6th Oct 1936 | Box 91 \ 1 scan0429 | |
| Phantom III engine vibrations and the proposed solution of dynamically balancing the flywheel. | 12th Oct 1936 | Box 91 \ 1 scan0430 | |
| Phantom III engine vibrations, following up on a previously requested design scheme for balancing flywheels after engine fitting. | 15th Oct 1936 | Box 91 \ 1 scan0431 | |
| Recommendation to use silver soldering for oil gallery joints on the Phantom III engine due to failures with soft solder. | 16th Oct 1936 | Box 91 \ 1 scan0432 | |
| Summary memo of ongoing car work jobs. | 19th Oct 1936 | Box 91 \ 1 scan0433 | |
| List of specifications and updates for various car components including brakes, clutch, and steering. | 19th Oct 1936 | Box 91 \ 1 scan0434 | |
| List of modifications and parts for Bentley, 25/30 HP, and Phantom III units. | 19th Oct 1936 | Box 91 \ 1 scan0435 | |
| List of modifications and parts, including deturbulated heads and strengthened exhaust valves, with their associated references. | 19th Oct 1936 | Box 91 \ 1 scan0436 | |
| Experimental, deeper pot for the Phantom III engine's oil pressure filter. | 2nd Nov 1936 | Box 91 \ 1 scan0437 | |
| Top over-oiling on the Phantom III and the implications of modifying oil supply to the rockers. | 5th Oct 1936 | Box 91 \ 1 scan0438 | |
| Design of the Phantom III engine wheelcase and sump for ease of servicing. | 9th Nov 1936 | Box 91 \ 1 scan0439 | |
| Progress report on design work to reduce material and labour costs for the Phantom III chassis. | 27th Nov 1936 | Box 91 \ 1 scan0440 | |
| Progress report on design modifications and cost-saving measures for various automotive components. | 27th Oct 1936 | Box 91 \ 1 scan0441 | |
| List of design and production modifications for vehicle components, with associated actions and cost savings. | 26th Nov 1936 | Box 91 \ 1 scan0442 | |
| The delay and reconstruction of a Long Wheelbase Phantom III steel limousine. | 27th Nov 1936 | Box 91 \ 1 scan0443 | |
| The history and delays in the body construction for a Long Wheelbase Phantom III, chassis 38-EX. | 26th Nov 1936 | Box 91 \ 1 scan0444 | |
| Chassis fitting issue regarding the back seat and the standard fuel tank. | 7th Dec 1936 | Box 91 \ 1 scan0445 | |
| Status report on the development and testing of various car components for the PH.III and 35-EX models. | 7th Dec 1936 | Box 91 \ 1 scan0446 | |
| Progress report on the testing and design of valve springs, exhaust systems, bearings, tyre noise reduction, and brakes. | 7th Dec 1936 | Box 91 \ 1 scan0447 | |
| Progress report on the Long and Continental Phantom III chassis, visibility, gearbox issues, chassis costs, and the 25/30 HP model. | 7th Dec 1936 | Box 91 \ 1 scan0448 | |
| Progress report on the 25/30 HP model and the Wraith chassis development. | 7th Dec 1936 | Box 91 \ 1 scan0449 | |
| Progress report on Bentley development, covering brakes, ride, clutch, body, engine, suspension, and bearings. | 7th Dec 1936 | Box 91 \ 1 scan0450 | |
| General report on developments including engine mountings, gearbox costs, aluminium alloys, spark plugs, and light alloy drums. | 7th Dec 1936 | Box 91 \ 1 scan0451 | |
| Test report on camshaft Ex.23243, detailing adjustments to tappet clearances to optimize slow running and noise levels. | 10th Dec 1936 | Box 91 \ 1 scan0452 | |
| Pronounced drive groan issue on the Phantom III model at 22-24 m.p.h. | 11th Dec 1936 | Box 91 \ 1 scan0453 | |
| Drive groan issue on Phantom III cars at low speeds and potential solutions. | 11th Dec 1936 | Box 91 \ 1 scan0454 | |
| Proposal for a cost-saving alternative design for the Phantom III Oil Level Indicator, based on the Phantom II's design. | 17th Dec 1936 | Box 91 \ 1 scan0455 | |
| Requesting rectification work on car 32-EX, including gearbox, suspension, and floorboard issues. | 18th Dec 1936 | Box 91 \ 1 scan0456 | |
| Manufacturing difficulties with the Phantom III rear engine support, suggesting proceeding with the current design until a modification is ready. | 21th Dec 1936 | Box 91 \ 1 scan0457 | |
| Special coachwork features for the Long Wheelbase Phantom III Enclosed Limousine 38-EX. | 21th Dec 1936 | Box 91 \ 1 scan0458 | |
| Request for accurate records of oil consumption for car 34-EX due to its special piston rings. | 21th Dec 1936 | Box 91 \ 1 scan0459 | |
| Preliminary specification for the Phantom III Series IX. | 21th Dec 1936 | Box 91 \ 1 scan0460 | |
| Specification list for the Phantom III - Series II engine. | 21th Dec 1936 | Box 91 \ 1 scan0461 | |
| Specification sheet detailing proposed changes and designs for various vehicle components. | 21th Dec 1936 | Box 91 \ 1 scan0462 | |
| List of specifications for the Propeller Shaft, Electrical system, and Controls. | 22th Dec 1936 | Box 91 \ 1 scan0463 | |
| Phantom III starter engagement failures and questioning production settings. | 22th Dec 1936 | Box 91 \ 1 scan0464 | |
| Starter motor engagement issues and design flaws for the Phantom III. | 22th Dec 1936 | Box 91 \ 1 scan0465 | |
| Issue with Phantom III starter motors being more serious than first thought. | 23th Dec 1936 | Box 91 \ 1 scan0466 | |
| Copy of Hancock's investigation report on Phantom III Starter Motors. | 29th Dec 1936 | Box 91 \ 1 scan0467 | |
| Cover note for an enclosed report concerning the Phantom III Starter Motor. | 29th Dec 1936 | Box 91 \ 1 scan0468 | |
| Starter motor troubles for the Phantom III, focusing on stopping mechanisms and safety features. | 12th Jan 1937 | Box 91 \ 1 scan0469 | |
| Starter production settings and the shape of engaging gear teeth. | 19th Jan 1937 | Box 91 \ 1 scan0470 | |
| List of non-standard modifications for the long wheelbase car, chassis 38-EX. | 19th Jan 1937 | Box 91 \ 1 scan0471 | |
| Request to fit 1450 lbs rear springs and change the rear auto-lock dampers to standard dampers. | 26th Jan 1937 | Box 91 \ 1 scan0472 | |
| Trial of different dampers to eliminate torsional vibration on Phantom III engines. | 26th Jan 1937 | Box 91 \ 1 scan0473 | |
| Instructing modifications to a car's experimental clutch and rear road springs. | 27th Jan 1937 | Box 91 \ 1 scan0474 | |
| Instruction memo detailing modifications to be carried out on car 36-EX. | 28th Jan 1937 | Box 91 \ 1 scan0475 | |
| Fault with the rear axle pinion on car 35-EX. | 15th Feb 1937 | Box 91 \ 1 scan0476 | |
| Instructions for repairs to a leaking petrol tank and to check the clutch fingers on car 36 EX. | 17th Feb 1937 | Box 91 \ 1 scan0477 | |
| Proposal to change the Phantom III's oil level indicator lever arm from aluminium to mild steel for correct weighting and robustness. | 18th Feb 1937 | Box 91 \ 1 scan0478 | |
| Experimental scheme for Phantom III top overoiling to prevent oil passing down the valve stems. | 19th Feb 1937 | Box 91 \ 1 scan0479 | |
| Modifications and standardisation of parts for the Bentley 35-EX model. | 22th Feb 1937 | Box 91 \ 1 scan0480 | |
| Requested modifications to a car's overdrive, propeller shaft, and engine stay. | 25th Feb 1937 | Box 91 \ 1 scan0481 | |
| Necessary repairs for a car after it was ditched, including wheel alignment and bodywork. | 25th Feb 1937 | Box 91 \ 1 scan0482 | |
| New parts fitted, engine decarbonisation, and future repairs for a PHANTOM III vehicle. | 3rd Mar 1937 | Box 91 \ 1 scan0483 | |
| Tests on experimental cars to address Phantom III engine roughness by altering balance weights and crankshafts. | 4th Mar 1937 | Box 91 \ 1 scan0484 | |
| New oil filler cap design for the Phantom III engine, to be made from Mazak No.3. | 5th Mar 1937 | Box 91 \ 1 scan0485 | |
| Requesting work on car 33-EX to continue with oil consumption tests. | 6th Mar 1937 | Box 91 \ 1 scan0486 | |
| Rear axle/suspension work and a water pump issue on a Phantom III, model 35-EX. | 9th Mar 1937 | Box 91 \ 1 scan0487 | |
| Confirming arrangements for a test of Wraith wheel movement on a Limousine car. | 11th Mar 1937 | Box 91 \ 1 scan0488 | |
| Oil drain pipes from the cylinder heads for the Phantom III engine. | 16th Mar 1937 | Box 91 \ 1 scan0489 | |
| Strengthened stay between the engine and gearbox for the Phantom III model to address transmission knocks. | 16th Mar 1937 | Box 91 \ 1 scan0490 | |
| Damage report for Chassis 33-EX following a road accident. | 16th Mar 1937 | Box 91 \ 1 scan0491 | |
| Instruction to fit the latest type louvred trumpets to Lucas WT.11.X. Horns on car 37-EX. | 20th Mar 1937 | Box 91 \ 1 scan0492 | |
| List of coachbuilders and body styles with their corresponding reference numbers and specifications. | 24th Mar 1937 | Box 91 \ 1 scan0493 | |
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