| Description | Date | Identifier | |
| Continuation of a test report detailing issues with battery ignition, radiator mounting, dashboard brackets, and steering column failure. | 4th May 1926 | Box 4 \ 9 09-page245 | |
| The condition of a vehicle's steering, front axle, pivots, brakes, and springs after testing. | 4th May 1926 | Box 4 \ 9 09-page246 | |
| Test report on the condition of vehicle components including shock dampers, clutch, gearbox, and starter motor. | 4th May 1926 | Box 4 \ 9 09-page247 | |
| The condition and maintenance of the rear axle, brakes, suspension, and propeller shaft. | 4th May 1926 | Box 4 \ 9 09-page248 | |
| The condition and performance of various vehicle components after use, including fittings, suspension, and exhaust. | 4th May 1926 | Box 4 \ 9 09-page249 | |
| Continued vehicle examination report detailing wear and tear, test performance, and tyre specifications. | 13th May 1926 | Box 4 \ 9 09-page250 | |
| Cover note for an attached report on car 10-G-111 after 7526 miles of running in France. | 13th May 1926 | Box 4 \ 9 09-page251 | |
| Cover note enclosing an abstract of comments on the daily tests and examinations of vehicle 10-D-2 during its 10,000-mile test. | 16th Jun 1931 | Box 4 \ 9 09-page252 | |
| List of vehicle faults and defects identified during testing or use, categorized by system. | 16th Jun 1931 | Box 4 \ 9 09-page253 | |
| List of faults and performance issues observed on Chassis No. 10-G-3. | 16th Jun 1926 | Box 4 \ 9 09-page254 | |
| The preparation of a 20 HP chassis for a 10,000-mile test and a pending design for a new petrol tank filler. | 16th Jun 1926 | Box 4 \ 9 09-page255 | |
| Cover page for the third 10,000-mile test on vehicle 10G III in France. | 26th Jan 1927 | Box 4 \ 9 09-page256 | |
| List of parts suitable for a 10,000-mile run on a 20 HP car. | 26th Jan 1927 | Box 4 \ 9 09-page257 | |
| Arrangement of a start date for Wor and Colonel Fell. | 8th Feb 1927 | Box 4 \ 9 09-page258 | |
| Postponement of a visit and the arrangement for using a 20 HP car. | 27th Feb 1927 | Box 4 \ 9 09-page259 | |
| Inquiry about the start date for a 10,000-mile trial on a 20 HP Experimental car. | 14th Feb 1927 | Box 4 \ 9 09-page260 | |
| The use of a 10,000-mile experimental car for upcoming trips. | 17th Feb 1927 | Box 4 \ 9 09-page261 | |
| Letter discussing car performance issues, including power, buffers, gears, and prop shaft mounting. | 17th Feb 1927 | Box 4 \ 9 09-page262 | |
| Modifications to a cylinder block and a blower carburettor system. | 17th Feb 1927 | Box 4 \ 9 09-page263 | |
| Letter discussing travel plans in France and arrangements for a car. | 4th Apr 1927 | Box 4 \ 9 09-page264 | |
| Travel arrangements for Mr. Hancock to Boulogne. | 4th Apr 1927 | Box 4 \ 9 09-page265 | |
| Request to insure a 20 HP car (10-G-111) and its drivers for a 10,000 miles test in France. | 5th Apr 1927 | Box 4 \ 9 09-page266 | |
| Telegram from Parsons regarding travel arrangements for Hancock and Pinsard. | 7th Apr 1927 | Box 4 \ 9 09-page267 | |
| Vehicle performance issues including steering, suspension, scuttle shake, and an oil leak following a road test. | 13th Apr 1927 | Box 4 \ 9 09-page268 | |
| Issues with a Zenith petrol filter blocking and affecting carburation. | 14th Apr 1927 | Box 4 \ 9 09-page269 | |
| Vehicle modifications, ongoing issues, and mileage after testing in France. | 15th Apr 1927 | Box 4 \ 9 09-page270 | |
| Letter from G.W. Hancock acknowledging a request to test a Zenith petrol filter. | 16th Apr 1927 | Box 4 \ 9 09-page271 | |
| Query regarding the permanent set and free length of cross steering tube springs. | 20th Apr 1927 | Box 4 \ 9 09-page272 | |
| Querying the new features and incomplete mileage reports for a 10,000-mile car test. | 1st Apr 1927 | Box 4 \ 9 09-page273 | |
| Steering issues including spring length, wheel alignment, and toe-in adjustments. | 22th Apr 1927 | Box 4 \ 9 09-page274 | |
| Typed letter discussing steering tube measurements, spring issues, and an oil leak from the rear crankshaft bearing. | 23th Apr 1927 | Box 4 \ 9 09-page275 | |
| Letter detailing the examination of shock dampers and other vehicle components. | 26th Apr 1927 | Box 4 \ 9 09-page276 | |
| Confirming receipt and fitting of a replacement engine bracket in Chateauroux, France. | 27th Apr 1927 | Box 4 \ 9 09-page277 | |
| Letter to Mr. Hancock in France discussing foreign matter in a petrol filter, shock absorber leakage, and leather packings. | 26th Apr 1927 | Box 4 \ 9 09-page278 | |
| Letter discussing the receipt of a shock damper, an unrequired engine bracket, and modifications to prevent oil leaks. | 2nd May 1927 | Box 4 \ 9 09-page279 | |
| Letter to Mr. Hancock regarding petrol starvation at high speeds and a request to test the filter. | 2nd May 1927 | Box 4 \ 9 09-page280 | |
| Request to arrange for car 10-G-111 to be at Dieppe and for an attendant to stay with the vehicle. | 6th May 1927 | Box 4 \ 9 09-page281 | |
| Short internal memo from Hs. to GWH regarding an attached note from CWB. | 7th May 1927 | Box 4 \ 9 09-page282 | |
| Letter confirming a telegram and rearranging an appointment for Chassis No. 10-G-111. | 9th May 1927 | Box 4 \ 9 09-page283 | |
| Telegram from Hancock querying a date discrepancy between two letters. | 9th May 1927 | Box 4 \ 9 09-page284 | |
| Typed note providing instructions regarding a letter and its date. | 28th Feb 1927 | Box 4 \ 9 09-page285 | |
| Typed memo from Commander Briggs to Hives regarding the cancellation of an arrangement for May sixth. | 9th May 1927 | Box 4 \ 9 09-page286 | |
| Telegram from Commander Briggs to Hives in Derby, cancelling a previous arrangement. | 9th May 1927 | Box 4 \ 9 09-page287 | |
| Letter discussing date discrepancies, subsequent financial arrangements, and reporting on vehicle issues with petrol starvation and steering. | 9th May 1927 | Box 4 \ 9 09-page288 | |
| To 'H.S.' from G.W. Hancock regarding a suspected loss of friction in a car's steering pivots. | 10th May 1927 | Box 4 \ 9 09-page289 | |
| Renewal of a car's Laissez Passer and a warning about potential delays at the port of landing due to a missing authorisation sheet. | 10th May 1927 | Box 4 \ 9 09-page290 | |
| Cover note for a report on the 10,000 miles test of car 10-G-111 in France. | 14th May 1927 | Box 4 \ 9 09-page291 | |
| The condition and faults found on chassis 10-G-III after a mileage of 4312 miles. | 10th May 1927 | Box 4 \ 9 09-page292 | |
| Condition and issues found with various engine and chassis components after a period of testing. | 10th May 1927 | Box 4 \ 9 09-page293 | |
| Performance and condition of various vehicle components, including the dynamo, ignition system, and steering. | 10th May 1927 | Box 4 \ 9 09-page294 | |
| The performance and condition of steering, suspension, and drivetrain components over mileage. | 10th May 1927 | Box 4 \ 9 09-page295 | |
| Condition report on various vehicle components including the servo, brakes, and suspension. | 10th May 1927 | Box 4 \ 9 09-page296 | |
| Inspection report detailing the condition of various vehicle components including body work, fittings, and electrical systems. | 10th May 1927 | Box 4 \ 9 09-page297 | |
| Test report detailing observations on spare wheel carriers, vehicle weight, performance, and tyres. | 10th May 1927 | Box 4 \ 9 09-page298 | |
| List of parts to be standardised on completion of a 10,000-mile test on car X5779. | 10th May 1927 | Box 4 \ 9 09-page299 | |
| Explaining the inability to carry out a test on wire wheels due to a lack of parts. | 17th May 1927 | Box 4 \ 9 09-page300 | |
| Test report on Chassis No. 10-G-3 after a 974-mile run in France, detailing performance of steering, suspension, brakes, and engine. | 21th May 1927 | Box 4 \ 9 09-page301 | |
| Various faults and observations from a vehicle test run, covering engine, transmission, and chassis components. | 21th May 1927 | Box 4 \ 9 09-page302 | |
| Test report page detailing petrol consumption, gauge issues, and feedback on new chassis and control features. | 21th May 1927 | Box 4 \ 9 09-page303 | |
| Technical report critiquing the design and placement of various vehicle controls and indicators. | 23th May 1927 | Box 4 \ 9 09-page304 | |
| List of modifications required for the 20 HP chassis following a 10,000-mile test in France. | 25th May 1927 | Box 4 \ 9 09-page305 | |
| Correspondence concerning the return of a broken spring, shock absorber, and burst tyre for chassis 10-G3. | 19th May 1925 | Box 4 \ 9 09-page306 | |
| Dispatch of the logbook for car 10-G-3 and a query about a potential exhaust manifold issue. | 20th May 1927 | Box 4 \ 9 09-page307 | |
| Work order from the Paris branch for repairs and parts on an experimental car. | 12th Mar 1927 | Box 4 \ 9 09-page308 | |
| Parts order form listing various components including cocks, pipes, and letters. | 12th Dec 1927 | Box 4 \ 9 09-page309 | |
| Schedule of alterations requested by Mr. Royce for the 20HP carburetter. | 1st Jun 1925 | Box 4 \ 9 09-page310 | |
| Modified carburetter for the 20HP model and the fitting of cutouts to 'D' steering cars. | 25th Aug 1925 | Box 4 \ 9 09-page311 | |
| Internal query regarding the suitability of a returned chassis for a Hooper fixed cabriolet body. | 25th May 1927 | Box 4 \ 9 09-page312 | |
| Providing filing instructions for previous correspondence. | 1st Jan 1932 | Box 5 \ 1 01-page001 | |
| Parts for a car returning to France, engine condition, and testing of compression ratios and fuel types. | 1st Jan 1932 | Box 5 \ 1 01-page002 | |
| Car modifications, test results, and arrangements for its return to France for further testing. | 1st Jan 1932 | Box 5 \ 1 01-page003 | |
| Short typed memo confirming a car will be ready for testing in France in approximately two weeks. | 18th Apr 1932 | Box 5 \ 1 01-page004 | |
| Strip report of engine 18.G.IV after a 10,000 miles test. | 8th Jan 1932 | Box 5 \ 1 01-page005 | |
| Technical inspection report on the condition of various vehicle components after testing. | 8th Jan 1932 | Box 5 \ 1 01-page006 | |
| Vehicle component condition report detailing wear and issues on pedals, axles, and suspension. | 3rd Jan 1932 | Box 5 \ 1 01-page007 | |
| Modifications to the 20/25 engine's water pump to prevent boiling at 200 RPM. | 10th Jan 1932 | Box 5 \ 1 01-page008 | |
| Interference of a shock damper with the J.3 engine carrying cross member. | 2nd Jan 1932 | Box 5 \ 1 01-page009 | |
| Recording delays in receiving manufacturing details for the 20/25 HP 'U' Series Chassis. | 15th Jan 1932 | Box 5 \ 1 01-page010 | |
| List of parts held up by the Drawing Office for the 20/25 HP Chassis 'U' Series. | 20th Jan 1932 | Box 5 \ 1 01-page011 | |
| Inquiry regarding the status of further tests and the disappointing results of modifications. | 20th Jan 1932 | Box 5 \ 1 01-page012 | |
| Modifications to car 18-G4 and the justification for sending it to France for testing. | 21th Jan 1932 | Box 5 \ 1 01-page013 | |
| Update on arranging a car for a trial. | 1st Jan 1932 | Box 5 \ 1 01-page014 | |
| Test car being held up due to the need to make new front wings and trying out alternative side wheel carriers. | 30th Jan 1932 | Box 5 \ 1 01-page015 | |
| Universal dashboard and adjustable steering column support for a 25HP model. | 15th Feb 1932 | Box 5 \ 1 01-page016 | |
| The process and confidentiality of issuing chassis prints for new car designs to coachbuilders. | 5th Feb 1932 | Box 5 \ 1 01-page017 | |
| Secret memo confirming the engine unit of a car is now running on the test bed. | 17th Feb 1932 | Box 5 \ 1 01-page018 | |
| Comparing the weight of the J.3 unit to the standard 2/25 unit, detailing a weight reduction and capacity increase. | 24th Feb 1932 | Box 5 \ 1 01-page019 | |
| J.3 chassis numbering, and the development of a second body and the Peregrine body. | 24th Feb 1932 | Box 5 \ 1 01-page020 | |
| Dissatisfaction with engine gear noise and the need for quieter engine designs. | 27th Feb 1932 | Box 5 \ 1 01-page021 | |
| Tests to determine the variation of tappet clearance during the engine warming-up period. | 1st Mar 1932 | Box 5 \ 1 01-page022 | |
| Technical report discussing rocker shaft noise, oil pump rattle, and crankshaft torsional periods. | 1st Mar 1932 | Box 5 \ 1 01-page023 | |
| Troubleshooting engine gear noise and flywheel hum by testing various cam-wheels. | 14th Oct 1931 | Box 5 \ 1 01-page024 | |
| Standardisation report for side and front engine guards on a chassis. | 14th Oct 1931 | Box 5 \ 1 01-page025 | |
| Standardisation of chassis parts form detailing implementation and costs for a new part. | 8th Mar 1932 | Box 5 \ 1 01-page026 | |
| Status and details of the 20/25 HP Chassis 'U' Series. | 8th Mar 1932 | Box 5 \ 1 01-page027 | |
| List of parts for the 20 HP, Chassis 'U' Series, held up by the Drawing Office. | 8th Feb 1932 | Box 5 \ 1 01-page028 | |
| Status of parts and drawings for the 20/25 HP Chassis 'U' Series. | 10th Feb 1932 | Box 5 \ 1 01-page029 | |
| The J.3 engine unit. | 19th Feb 1932 | Box 5 \ 1 01-page030 | |
| Engine test, detailing performance regarding vibrations, leaks, ignition, and outlining further work required. | 19th Feb 1932 | Box 5 \ 1 01-page031 | |
| Power curve graph comparing the B.M.E.P. and B.HP between Japan III and Japan I units, with corresponding valve timing diagrams. | 15th Mar 1932 | Box 5 \ 1 01-page032 | |
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