| Description | Date | Identifier | |
| Development program and fitting of P. 2 shock dampers. | 6th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan017 | |
| Modifications to a rear apron and petrol tank gauge fitting for P.2 and 25HP cars. | 6th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan018 | |
| Investigation into change gear designs, referencing Maybach jaws and Salerni rings. | 6th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan019 | |
| Design of the oil pump and distributor drive, referencing drawing LeC. 2883. | 7th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan020 | |
| Development, patent status, and riding improvements of hydraulic shock dampers. | 7th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan021 | |
| Request for information on Bentley coachwork to understand and research the 'booming of bodies'. | 7th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan022 | |
| Alternative, lighter, and simpler method for manufacturing shock damper pistons. | 7th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan023 | |
| Identifying and mitigating car body vibrations and booming noises by analysing periodicity. | 3rd Mar 1931 | West Wittering \ V \ March1931-September1931 Scan024 | |
| Improvements to the engine and chassis to reduce vibration and achieve a quieter car. | 9th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan025 | |
| Car dynamo performance, brush control, and potential winding modifications to manage output at different speeds. | 9th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan026 | |
| Gearbox development, comparing proprietary designs against the Maybach box, and outlining future improvements. | 9th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan027 | |
| Design changes and prints for the clutch and brake pedals on the J. 3 model. | 10th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan028 | |
| Instruction to modify a flywheel with 9 bolts instead of 6 for testing purposes. | 10th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan029 | |
| Twisting issues with side wheel carriers on the Japan III model. | 10th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan030 | |
| Repairs and modifications for a car designated for 'R', likely Sir Henry Royce. | 10th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan031 | |
| Design of side wheel carriers and brackets to prevent frame twisting on various chassis. | 10th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan032 | |
| The 'Japan 3' gearbox and clutch schemes. | 10th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan033 | |
| With sketches discussing designs for crankshaft balance weights and stud fixings. | 11th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan034 | |
| Secret memo regarding the Japan 3 oil pump and distributor drive relief valve. | 11th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan035 | |
| Agreeing to a trial of a cast iron piston for shock dampers. | 11th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan036 | |
| Secret memo regarding a print for the front end of the crankcase and cross drive, with mention of future schemes. | 12th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan037 | |
| Different schemes and calculations for crankshaft balance weights. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan038 | |
| Engine balancing schemes, load calculations, and comparing car versus aero engine designs. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan039 | |
| Causes and potential solutions for vibrations and 'booming' in P.2 & 25HP cars. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan040 | |
| Methods to reduce engine and chassis vibrations, including soft mounting and component stiffening. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan041 | |
| Investigations into engine mounting, body booms, and flywheel issues. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan042 | |
| Design criticisms and proposed changes for a standard rear apron. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan043 | |
| Investigation into whether the chassis or the body is the cause of 'booming' and vibration issues in P.2. & 25HP cars. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan044 | |
| Engine and body mounting solutions to reduce vibration and booming, with comparisons to Bentley designs. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan045 | |
| Unresolved issues of body noise and vibration, comparing models Phantom I and P.2. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan046 | |
| Design of a centrally vented petrol tank versus a balanced line gauge. | 13th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan047 | |
| Causes and potential cures for vehicle vibrations and body booms. | 14th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan048 | |
| Engine vibrations, frame elasticity, and body mounting solutions. | 14th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan049 | |
| Crashing engagements in the Maybach vacuum-controlled change gear and a proposed interlock solution. | 14th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan050 | |
| The position of a fan bracket in relation to a proposal for a single cast iron cylinder and crankcase. | 14th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan051 | |
| Print for a crankcase lower half, highlighting issues with the oil level float. | 14th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan052 | |
| Proposed changes and alternative schemes for the 'Japan 3' water pump and drive system. | 14th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan053 | |
| Secret memo outlining proposals for the Japan 3 project's crankshaft damper and engine suspension. | 14th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan054 | |
| Warner gearbox's synchro-mesh operation, comparing it to a Buick system and considering its suitability. | 16th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan055 | |
| Challenges and proposed modifications for fitting Phantom shock dampers to a 25HP model. | 16th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan056 | |
| Secret memo discussing options for the reserve petrol supply and suggesting buying a petrol pump for the 'J. 3.' model. | 1st Mar 1931 | West Wittering \ V \ March1931-September1931 Scan057 | |
| Proposal for engine mountings using a flexible parallel motion linkage to manage torsional oscillation and thermal expansion. | 17th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan058 | |
| The design, materials, and manufacturing of a new hydraulic shock damper piston. | 17th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan059 | |
| Technical notes on shock damper design, materials, and associated components. | 18th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan060 | |
| New front axle and brake design, with improvements over the existing 25HP model. | 18th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan061 | |
| Vibrations, engine mounting, and frame rigidity in comparison to competitors like Bentley and Hispano-Suiza. | 18th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan062 | |
| Engine cylinder count and frame design to reduce vibration. | 18th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan063 | |
| Preliminary drawing of a clutch and flywheel, detailing design considerations due to increased engine torque. | 18th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan064 | |
| Car production strategy, costs, quality, and accessories. | 19th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan065 | |
| Secret memo discussing dimensional errors found on a mock-up bonnet and radiator for a 'Japan III' model. | 19th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan066 | |
| Methods for stiffening the frame for side-of-bonnet spare wheel carriers. | 19th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan067 | |
| From 'R' at Le Canadel regarding car 18-EX and a potential visit and car trial in France. | 19th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan068 | |
| The general arrangement of the J. 3 engine and the potential benefits of using a 'Z' shaped front cross member. | 21th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan069 | |
| Secret memo regarding the driving seat positions for the 'Japan 3' model, in comparison to the 20/25HP. | 21th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan070 | |
| The design specifications for a universal dashboard for the 'Japan 3' model. | 21th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan071 | |
| Proposal for attaching the dash to the frame with sheet steel brackets to counter twisting from the side spare wheel. | 21th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan072 | |
| Merits of direct braking systems over servo-assisted brakes for the J. 3. model. | 21th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan073 | |
| New carburetter's potential patent infringement and the decision to proceed with modifications. | 21th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan074 | |
| Revisions to a shock-damper piston and the incorporation of an inlet valve. | 21th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan075 | |
| Use of rubber isolation on the dash column to resolve a booming issue in cars at 60 MPH. | 23th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan076 | |
| Design revisions and considerations for a revised horizontal shock damper. | 24th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan077 | |
| Standardization of a dash control for the petrol reserve on the Phantom II. | 24th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan078 | |
| 'Farley' easy change gearbox and its features. | 24th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan079 | |
| Technical analysis of the 'booming' vibration phenomenon in cars, discussing its source, mechanics, and proposed tests. | 25th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan080 | |
| Page discussing sound amplification theory in a car, with diagrams illustrating a scuttle and a diaphragm speaker. | 25th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan081 | |
| Analysis of body resonance, frame flexibility, and a comparison of chassis differences between P.I. & P.2 models. | 25th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan082 | |
| Analysis of sound resonance and 'booming' issues in modern car bodies compared to older designs. | 25th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan083 | |
| Increasing the 25HP propeller shaft diameter from 2.5 to 3 inches to prevent whirling. | 25th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan084 | |
| Clarifying the author's non-involvement in the investigation into 'booming cars' for the P.2. & 20/25HP models. | 25th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan085 | |
| Strategy, control, and expenditure for patent renewals. | 25th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan086 | |
| Engine vibrations, body booms, and various solutions including modified engine mountings and flywheel balancing. | 25th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan087 | |
| Suggesting modifications to the epicyclic third-speed gearbox controls to prevent gashing and improve finger grip clearance. | 30th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan088 | |
| Issues with a down-draught carburettor and proposing an improved induction pipe. | 2nd Apr 1931 | West Wittering \ V \ March1931-September1931 Scan089 | |
| Design and implementation of a combined petrol tap on the dashboard for the P.2 model. | 2nd Apr 1931 | West Wittering \ V \ March1931-September1931 Scan090 | |
| Crash noises in an epicyclic 3rd-speed gearbox and proposed modifications to jaw angles and teeth. | 2nd Apr 1931 | West Wittering \ V \ March1931-September1931 Scan091 | |
| Modifications to exhaust manifolds and pipes for the 20 & 25HP chassis. | 2nd Apr 1931 | West Wittering \ V \ March1931-September1931 Scan092 | |
| New 'Double Top' epicyclic gearbox scheme, its potential issues, and comparisons to other designs. | 4th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan093 | |
| Design review and critique of hydraulic shock dampers, with annotated diagrams. | 3rd Apr 1931 | West Wittering \ V \ March1931-September1931 Scan094 | |
| Technical memorandum with diagrams suggesting design improvements for the 'Japan 3. Clutch' to reduce weight and cost. | 4th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan095 | |
| Design of exhaust pipes, focusing on materials, thermal expansion, and potential design improvements for the 25HP model. | 4th Mar 1931 | West Wittering \ V \ March1931-September1931 Scan096 | |
| Schematic drawing of a chassis or exhaust system with handwritten annotations. | 3rd Apr 1931 | West Wittering \ V \ March1931-September1931 Scan097 | |
| Design improvements for hydraulic shock dampers. | 3rd Apr 1931 | West Wittering \ V \ March1931-September1931 Scan098 | |
| Design and development of a double top gear system. | 7th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan099 | |
| Engine vibrations, body booms, frame stiffness, and engine mounting. | 1st Apr 1931 | West Wittering \ V \ March1931-September1931 Scan100 | |
| Chassis torsional stiffness, engine mounting, vibration damping, and proposed design improvements. | 8th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan101 | |
| Packard Diesel Fuel Pump, attaching a print and providing an opinion on its performance. | 8th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan102 | |
| Blueprint showing a cross-section of a Packard Diesel Engine Fuel Injection Pump. | 30th May 1930 | West Wittering \ V \ March1931-September1931 Scan103 | |
| Cover note for a print concerning crankshafts and bearings. | 9th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan104 | |
| Technical memorandum discussing chassis stiffening to address issues like fuss, roar, boom, and shimmy. | 9th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan105 | |
| Operational issues with an epicyclic 3rd speed gearbox. | 9th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan106 | |
| From 'R.' discussing the J.3 car's engine, comparing it to a new Bentley, and detailing chassis stiffness requirements. | 9th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan107 | |
| Development of car carburetters, specifically double carburetters and related design issues. | 1st Apr 1931 | West Wittering \ V \ March1931-September1931 Scan108 | |
| Design improvements for a 25HP exhaust pipe nozzle, including the use of webs and better iron. | 9th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan109 | |
| Design and features of a new single-valve, double-acting shock damper. | 9th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan110 | |
| Proposed modification to radiator caps to prevent bursting radiators by altering the washer. | 11th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan111 | |
| Investigating the source of vibrations and booming in the P. 2. car engine, detailing telegrams exchanged and theories regarding the flywheel and torsional damper. | 12th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan112 | |
| Engine modifications to address vibration, covering crankchambers, flywheels, clutches, and balance weights. | 13th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan113 | |
| Secret memo on the revised specification for the 'Japan 3' engine, detailing proposals for the cylinder block, crankcase, and cylinder head. | 13th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan114 | |
| Proposed design modifications for engine components, including water circulation, crankcase, and drives. | 13th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan115 | |
| Page detailing proposed modifications for oil fittings and the use of standard ball bearings. | 14th Apr 1931 | West Wittering \ V \ March1931-September1931 Scan116 | |
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