| Description | Date | Identifier | |
| Potential names for a new car model ('No.3') and proposed technical changes to the 15HP chassis ('J.3'). | 14th Oct 1931 | Box 5a \ 1 01-page192 | |
| Internal codename 'Japan 5' for a new model, and the timing for creating a prototype. | 1st Aug 1921 | Box 5a \ 1 01-page193 | |
| The new front engine and radiator support, with the design changed due to a deeper radiator. | 1st Aug 1931 | Box 5a \ 1 01-page194 | |
| Potential performance improvements for the 25 HP model to increase sales. | 1st Aug 1931 | Box 5a \ 1 01-page195 | |
| Bench tests and modifications to improve the performance of a 25 HP power unit. | 1st Aug 1931 | Box 5a \ 1 01-page196 | |
| Performance and handling of a car during high-speed tests, noting lap times, engine roughness, and component effectiveness. | 5th Aug 1931 | Box 5a \ 1 01-page197 | |
| Blueprint graph of engine performance test results from Brooklands. | 1st Aug 1931 | Box 5a \ 1 01-page198 | |
| Graph comparing the performance and back pressure of five different exhaust systems against engine RPM. | 11th Aug 1931 | Box 5a \ 1 01-page199 | |
| Brooklands performance test data for a 12 G IV Close Coupled Four Seater, comparing various car and engine configurations. | 14th Aug 1931 | Box 5a \ 1 01-page200 | |
| Assessment of the appearance and production suitability of a 25HP car on its way to France. | 1st Jan 1931 | Box 5a \ 1 01-page201 | |
| Acceleration and hill climbing tests to confirm the improved performance of a 25 HP car. | 19th Aug 1931 | Box 5a \ 1 01-page202 | |
| Low speed performance tests for hill climbs and acceleration comparing different carburettor and silencer setups. | 15th Aug 1931 | Box 5a \ 1 01-page203 | |
| Proposing tests on a 25 HP high performance car at Brooklands. | 24th Aug 1931 | Box 5a \ 1 01-page204 | |
| Dispatch of drawing LeC. 2938 for the J.3. crankcase, cylinder block, and crankshaft. | 1st Aug 1931 | Box 5a \ 1 01-page205 | |
| Test report on a modified 25 HP car at Brooklands race track. | 29th Mar 1931 | Box 5a \ 1 01-page206 | |
| Performance comparison chart of a 25 HP car's lap speeds at Brooklands Track with various engine and axle configurations. | 26th Aug 1931 | Box 5a \ 1 01-page207 | |
| Bar chart comparing the high-speed performance of a 25 HP car with different engine, carburetter, and axle configurations at Brooklands track. | 26th Aug 1931 | Box 5a \ 1 01-page208 | |
| Results of experiments on the 25 HP car and plans for incorporating new features. | 29th Aug 1931 | Box 5a \ 1 01-page209 | |
| Results of experimental work to improve the performance and smoothness of the 20/25 HP car. | 1st Sep 1931 | Box 5a \ 1 01-page210 | |
| Delay to the 25 HP experimental car 18-S4 due to fitting an improved synchro-mesh gearbox. | 2nd Sep 1931 | Box 5a \ 1 01-page211 | |
| Progress report on the J.3. project, detailing cost-saving design improvements and steering adjustments. | 3rd Sep 1931 | Box 5a \ 1 01-page212 | |
| Technical memo outlining required improvements for 25HP and 45HP car models. | 7th Sep 1931 | Box 5a \ 1 01-page213 | |
| Engine performance trade-offs, prioritizing reliability over maximum speed and horsepower. | 7th Sep 1931 | Box 5a \ 1 01-page214 | |
| Technical memo discussing engine performance specifications and modifications for the Phantom II. | 7th Sep 1931 | Box 5a \ 1 01-page215 | |
| Material change from aluminium to cast iron for the Peregrine J.111 crankcase and cylinder block. | 15th Sep 1931 | Box 5a \ 1 01-page216 | |
| Design policy for the 'Peregrine' project, comparing scaled-down vs. shared components from the J.3 model. | 15th Sep 1931 | Box 5a \ 1 01-page217 | |
| The standardization of parts for the 20 HP Chassis 'T' Series. | 25th Sep 1931 | Box 5a \ 1 01-page218 | |
| Proposed improvements and new parts for the 25 HP car model. | 1st Oct 1931 | Box 5a \ 1 01-page219 | |
| Concluding remarks about implementing improvements on a 25 HP car following satisfactory tests. | 14th Oct 1931 | Box 5a \ 1 01-page220 | |
| Design options and cost for a front apron on a 'Y' Series chassis. | 14th Oct 1931 | Box 5a \ 1 01-page221 | |
| Inquiry about the readiness of a component for a 10,000-mile test. | 14th Oct 1931 | Box 5a \ 1 01-page222 | |
| Road tests for a car with new features, including a modified crankshaft, flywheel, and exhaust valves. | 14th Oct 1931 | Box 5a \ 1 01-page223 | |
| Confirmation of a telephone conversation regarding modifications to frame width for Phantom II and Peregrine, and a discussion on wheel and tyre specifications. | 19th Oct 1931 | Box 5a \ 1 01-page224 | |
| Tyre dimensions, their impact on chassis height and steering, and the provision of blueprints. | 19th Oct 1931 | Box 5a \ 1 01-page225 | |
| Approval process for new part drawings for the Japan 3 and Peregrine I projects. | 22th Oct 1931 | Box 5a \ 1 01-page226 | |
| Requesting an update on the completion timeline for the Japan 3 Engine Section design work. | 1st Oct 1941 | Box 5a \ 1 01-page227 | |
| Delays on the 'Japan 3' engine project and a revised completion target of Christmas. | 26th Oct 1931 | Box 5a \ 1 01-page228 | |
| Holding production on a list of experimental parts for the 'T' series. | 29th Oct 1931 | Box 5a \ 1 01-page229 | |
| Alterations for the second half of the 25 HP 'T' series and suggesting a conference to review the changes. | 29th Oct 1931 | Box 5a \ 1 01-page230 | |
| From 'R' discussing design improvements and considerations for the 'Japan 1 Unit' engine. | 30th Oct 1931 | Box 5a \ 1 01-page231 | |
| Confirming the production of an additional 25 chassis for the 25 HP 'T' series. | 2nd Nov 1931 | Box 5a \ 1 01-page232 | |
| Modifications and proposed standard items for the 20/25 HP Chassis T-Series. | 3rd Nov 1931 | Box 5a \ 1 01-page233 | |
| Listing six new parts or alterations for the second half of the 20/25 Chassis 'T' Series. | 4th Nov 1931 | Box 5a \ 1 01-page234 | |
| Various component failures in a 19-G4 model car at 15,000 miles. | 1st Nov 1931 | Box 5a \ 1 01-page235 | |
| Blueprint Lec.2969 for fan drive, exhaust, and water connections, noting uncertainty about front axle and steering tube positions. | 17th Nov 1931 | Box 5a \ 1 01-page236 | |
| Cover memo for a Fitting Department report on the first 'T' series 20/25 HP chassis. | 9th Nov 1931 | Box 5a \ 1 01-page237 | |
| List of ten issues and required modifications for the 20/25 HP 'T' Series, 2nd 100 vehicle. | 5th Nov 1931 | Box 5a \ 1 01-page238 | |
| Issues with the radiator suspension on ball pins, specifically the length of the centre distance piece. | 5th Nov 1931 | Box 5a \ 1 01-page239 | |
| Progress report on the design and development of the J.S. engine. | 21th Nov 1931 | Box 5a \ 1 01-page240 | |
| Car 19-G4 after 15,000 miles, detailing component issues and modifications. | 10th Nov 1931 | Box 5a \ 1 01-page241 | |
| Extract from a memo on car design work, specifically concerning a new rubber support for the radiator and engine front end. | 10th Nov 1931 | Box 5a \ 1 01-page242 | |
| On car design work, discussing issues with petrol gauges, ignition coils, and exhaust pipes. | 10th Nov 1931 | Box 5a \ 1 01-page243 | |
| Pump connections, engine mounting, and carburetter design for the L.S. & Peregrine. | 14th Nov 1931 | Box 5a \ 1 01-page244 | |
| Modifications to a 25 HP car for Lord Cholmondeley and its performance trial results. | 14th Nov 1931 | Box 5a \ 1 01-page245 | |
| List of modifications and improvements for the 20/25 chassis. | 7th Nov 1931 | Box 5a \ 1 01-page246 | |
| Status update memo on various automotive components and planned standardizations. | 7th Nov 1931 | Box 5a \ 1 01-page247 | |
| Unsuitability of the 20HP and J.1 engines for speed and supercharging programmes. | 26th Nov 1931 | Box 5a \ 1 01-page248 | |
| Design and layout for the rear end of car J.3. | 30th Nov 1931 | Box 5a \ 1 01-page249 | |
| The production of 100 20/25 HP 'U' Series chassis, numbers 3801-3900. | 3rd Dec 1931 | Box 5a \ 1 01-page250 | |
| Production schedule for the 20/25 HP Chassis 'U' Series (3801 - 3900). | 31th Dec 1931 | Box 5a \ 1 01-page251 | |
| Calculations and diagrams for an improved camshaft for China. | 3rd Dec 1931 | Box 5a \ 1 01-page252 | |
| Driving seat positions, pedals, and levers for the J.3. model. | 3rd Dec 1931 | Box 5a \ 1 01-page253 | |
| Cover note for scheme 3390, the general arrangement of J. 3., requesting blueprints and confirming printing feasibility. | 8th Dec 1931 | Box 5a \ 1 01-page254 | |
| Specifications for a sportier 25 HP car, with suggestions for modifications to increase speed. | 19th Dec 1931 | Box 5a \ 1 01-page255 | |
| The condition of an 18-GIV engine unit after a 10,000-mile test, detailing the state of various components. | 21th Dec 1931 | Box 5a \ 1 01-page256 | |
| Findings on the flywheel, clutch, and various chassis components. | 1st Dec 1931 | Box 5a \ 1 01-page257 | |
| Condition report on vehicle components, identifying an oil leak in the rear axle and wear issues with the pedals and gearbox. | 1st Dec 1931 | Box 5a \ 1 01-page258 | |
| Blueprint of a 25HP Rear Brake Actuating Shaft. | 17th Dec 1931 | Box 5a \ 1 01-page259 | |
| Table of cylinder bore measurements showing diameter and wear after 15,000 miles. | 17th Dec 1931 | Box 5a \ 1 01-page260 | |
| Blueprint diagram illustrating a required alteration to the exhaust valve seating to prevent hammering. | 29th Nov 1931 | Box 5a \ 1 01-page261 | |
| Photograph displaying two rows of engine bearing shells for examination. | 25th Jan 1931 | Box 5a \ 1 01-page262 | |
| Review of the 25 HP model's position and proposals for performance improvements and developments. | 25th Jan 1931 | Box 5a \ 1 01-page263 | |
| Comments on the performance of the experimental car 18.G.4 after a 10,000-mile test in France. | 28th Dec 1931 | Box 5a \ 1 01-page264 | |
| Faults found on a vehicle, including issues with brakes, clutch, radiator, and electrics. | 29th Dec 1931 | Box 5a \ 1 01-page265 | |
| List of specifications and modifications for the gearbox, propeller shaft, and other chassis components. | 29th Dec 1931 | Box 5a \ 1 01-page266 | |
| Modifications for the final 25 chassis in the 'T' series. | 29th Dec 1931 | Box 5a \ 1 01-page267 | |
| Proposed modifications for a Continental 20/25 engine, including wheels, axle, and compression ratio. | 1st Dec 1931 | Box 5a \ 1 01-page268 | |
| 10,000-mile test, recommending a new chassis for production based on performance and sales potential. | 30th Aug 1931 | Box 5a \ 1 01-page269 | |
| Requesting an opportunity to test car 18-G-4 after modifications, before its return to France. | 31th Dec 1931 | Box 5a \ 1 01-page270 | |
| Instruction to order material for 100 'U' series 20/25 HP chassis based on features from the 'T' series. | 31th Dec 1931 | Box 5a \ 1 01-page271 | |
| Proposed modifications for the 20 HP model, to be called India 3. | 22th Jul 1927 | Box 5a \ 2 02-page001 | |
| Progress on a frame and engine crankshaft for the next 20 HP car intended for trial in France. | 1st Sep 1927 | Box 5a \ 2 02-page002 | |
| Modifications for the 20 HP car, testing new models in France and rebranding the 40/50. | 21th Oct 1927 | Box 5a \ 2 02-page003 | |
| Confirming the preparation for a 10,000-mile test on a 20 HP chassis with new steering. | 11th Nov 1927 | Box 5a \ 2 02-page004 | |
| Instructions for preparing a 20 HP car for a 10,000-mile test in France, detailing proposed modifications. | 14th Nov 1927 | Box 5a \ 2 02-page005 | |
| List of twenty features to be incorporated into a chassis for the 'India 3 - 10,000 Miles Test in France'. | 11th Nov 1927 | Box 5a \ 2 02-page006 | |
| Continued list of engine component specifications and modifications. | 12th Mar 1927 | Box 5a \ 2 02-page007 | |
| Introduction of an 'X' shaped 4th cross member for the 20 HP car frame and the resulting modifications required. | 12th Mar 1927 | Box 5a \ 2 02-page008 | |
| Outlining required improvements for the 20 HP India 3 model. | 10th Mar 1928 | Box 5a \ 2 02-page009 | |
| List of nine proposed modifications for the 20 HP India 3 Next 10,000 Miler Engine. | 1st Mar 1928 | Box 5a \ 2 02-page010 | |
| Implementation of central oiling and oil-retaining universal joints on a 20 HP car model. | 3rd Mar 1928 | Box 5a \ 2 02-page011 | |
| Frame modifications and required features for the 20 HP India 3 model. | 5th Mar 1928 | Box 5a \ 2 02-page012 | |
| Arrangements for sending a 20 HP car, 14-G-4, to France. | 17th Dec 1923 | Box 5a \ 2 02-page013 | |
| Arrangements and conditions for a 10,000-mile test on the 'SS' model, referencing a previous fatal accident. | 17th Dec 1928 | Box 5a \ 2 02-page014 | |
| Continuation page of a document discussing the potential repetition of a test. | 17th Dec 1928 | Box 5a \ 2 02-page015 | |
| Running schedule for the 18-EX vehicle, detailing daily mileage and activities. | 17th Dec 1928 | Box 5a \ 2 02-page016 | |
| Schedule of running for a 20 HP vehicle, detailing dates, a route, and mileage. | 18th Dec 1928 | Box 5a \ 2 02-page017 | |
| Letter discussing the running schedule and transport arrangements for a 20 HP car to Chateauroux, France. | 18th Dec 1928 | Box 5a \ 2 02-page018 | |
| Arrangements for a 20 HP car to arrive at Le Havre and clear customs. | 19th Dec 1928 | Box 5a \ 2 02-page019 | |
| Start of a 10,000-mile test for a car at Chateauroux. | 22th Dec 1928 | Box 5a \ 2 02-page020 | |
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