| Description | Date | Identifier | |
| Running schedule for a 20 HP vehicle, detailing daily mileage over a period in December and January. | 18th Dec 1928 | Box 11 \ 2 02-page012 | |
| Typed fault report from France regarding numerous vehicle issues including oil and water leaks, and problems with the clutch, starter, and fuel system. | 18th Dec 1928 | Box 11 \ 2 02-page013 | |
| Typed letter from France reporting on vehicle issues including water loss, fuel filter problems, and dynamo output. | 19th Dec 1928 | Box 11 \ 2 02-page014 | |
| Various vehicle issues including electrical, exhaust, chassis, and engine problems, along with driver logistics. | 18th Dec 1928 | Box 11 \ 2 02-page015 | |
| Secret memorandum on the development and 10,000-mile testing of the 'SS' car against the 18-EX and Phantom models. | 18th Dec 1928 | Box 11 \ 2 02-page016 | |
| Wheel and rim sizes for 'SS' cars, including using 18-EX wheels and testing 20' and 21' rims. | 19th Dec 1928 | Box 11 \ 2 02-page017 | |
| Letter detailing radiator design faults causing water loss and issues with a choked petrol filter on car IS4-EX. | 19th Dec 1928 | Box 11 \ 2 02-page018 | |
| Vehicle performance issues covering the dynamo, exhaust, sub-frame, suspension, an oil leak, and driver licensing logistics. | 19th Dec 1928 | Box 11 \ 2 02-page019 | |
| Plan view of a radiator showing the water outlet. | 19th Dec 1928 | Box 11 \ 2 02-page020 | |
| Letter confirming a telegram instruction to wire daily total mileage and any failures, with a handwritten note on testing. | 19th Dec 1928 | Box 11 \ 2 02-page021 | |
| Secret memo reporting on the fault-free completion of the first 1500 miles of a 10,000-mile test on car 18-EX. | 20th Dec 1928 | Box 11 \ 2 02-page022 | |
| Letter regarding vehicle testing in France, discussing speed performance and requesting daily progress reports. | 20th Dec 1928 | Box 11 \ 2 02-page023 | |
| Outlining the programme and logistics for the final stages of a 10,000-mile car test. | 20th Dec 1928 | Box 11 \ 2 02-page024 | |
| Testing program and modifications for experimental cars 18.EX and 19.EX. | 18th Dec 1928 | Box 11 \ 2 02-page025 | |
| Status update letter from France regarding vehicle testing issues, mechanical faults, and a query about Christmas work arrangements. | 20th Dec 1928 | Box 11 \ 2 02-page026 | |
| Confirming an instruction from a telegram regarding the daily reporting of mileage in France. | 20th Dec 1928 | Box 11 \ 2 02-page027 | |
| Handover of a car for a 9000-mile test and the dispatch of replacement parts to correct faults. | 21th Dec 1928 | Box 11 \ 2 02-page028 | |
| Vehicle suspension tuning and tyre pressure adjustments. | 21th Dec 1928 | Box 11 \ 2 02-page029 | |
| Instructions for a 10,000-mile test on the 'SS' car 18-EX, detailing personnel movements and vehicle handover. | 21th Dec 1928 | Box 11 \ 2 02-page030 | |
| Secret memo discussing the progress and required adjustments for the 'SS' car during its 10,000-mile trial. | 21th Dec 1928 | Box 11 \ 2 02-page031 | |
| Typed memo regarding service arrangements and parts for a job in France. | 22th Dec 1928 | Box 11 \ 2 02-page032 | |
| Telegram about sending personnel and parts to Chateauroux, France to correct faults during a test. | 21th Dec 1928 | Box 11 \ 2 02-page033 | |
| Letter reporting on a broken shock-damper and clutch issues during a 10,000-mile test. | 24th Dec 1928 | Box 11 \ 2 02-page034 | |
| Faults with a car's exhaust manifolds, engine fabric coupling, and clutch assembly. | 26th Dec 1928 | Box 11 \ 2 02-page035 | |
| Testing issues with manifolds, couplings, and tyres, along with mileage targets. | 27th Dec 1928 | Box 11 \ 2 02-page036 | |
| Progress report on the 'SS' 10,000 miles test in France, detailing issues found after 5000 miles. | 27th Dec 1928 | Box 11 \ 2 02-page037 | |
| Faults from a 10,000 miles test, concerning radiator leakage and a silencer pipe. | 27th Dec 1928 | Box 11 \ 2 02-page038 | |
| Vehicle electrical and mechanical issues following a road test, including telegram correspondence. | 27th Dec 1928 | Box 11 \ 2 02-page039 | |
| Rear engine oil leak and the car's performance compared to previous Phantoms. | 29th Dec 1928 | Box 11 \ 2 02-page040 | |
| Providing an update on the progress of 10,000-mile road tests in France for 'SS' and 20 HP cars. | 29th Dec 1928 | Box 11 \ 2 02-page041 | |
| Letter arranging the handover and examination of experimental cars in France. | 31th Dec 1928 | Box 11 \ 2 02-page042 | |
| The condition of an S.S. car, detailing faults with the shock-damper, brakes, engine valve, and starter motor. | 31th Dec 1928 | Box 11 \ 2 02-page043 | |
| Various mechanical faults and performance issues observed during a vehicle test run. | 31th Dec 1928 | Box 11 \ 2 02-page044 | |
| Multiple faults found on a vehicle, including electrical, bodywork, steering, and engine issues. | 1st Jan 1929 | Box 11 \ 2 02-page045 | |
| Letter detailing the breaking of front wing stays on car 14-G4 and the planned repair. | 1st Jan 1929 | Box 11 \ 2 02-page046 | |
| Vehicle performance issues including pre-ignition and a choked engine, with plans for further experiments. | 7th Jan 1928 | Box 11 \ 2 02-page047 | |
| Replying to queries about modifications and testing schedules for experimental car models. | 1st Jan 1929 | Box 11 \ 2 02-page048 | |
| Wheel alterations for car 19-EX and travel arrangements for testing. | 2nd Jan 1929 | Box 11 \ 2 02-page049 | |
| Secret report on the 'SS' car's 8400-mile road test in France, detailing performance improvements and issues with vibration and the exhaust system. | 2nd Jan 1929 | Box 11 \ 2 02-page050 | |
| Oil leak from a crankshaft and a failed fabric coupling on the 16-EX car, with comparisons to the Phantom model. | 3rd Dec 1928 | Box 11 \ 2 02-page051 | |
| The condition of a vehicle after a 9,000-mile road test, detailing required repairs and design issues. | 3rd Dec 1928 | Box 11 \ 2 02-page052 | |
| Exhaust manifold flange failure and the plan to complete a 7500-mile endurance test. | 5th Jan 1929 | Box 11 \ 2 02-page053 | |
| Letter from G.W.H. to Hs. Derby reporting on a 20-HP test car, detailing issues with wing stays, an oil leak, and ride instability. | 5th Jan 1929 | Box 11 \ 2 02-page054 | |
| Faults with the engine and exhaust system during 'SS' model development. | 1st Jan 1929 | Box 11 \ 2 02-page055 | |
| Various component issues and ongoing modifications for a car model, covering the exhaust, carburation, vacuum pump, clutch, and brakes. | 1st Jan 1929 | Box 11 \ 2 02-page056 | |
| Design issues and proposed solutions for various automotive components like shock absorbers, couplings, and starter motors. | 10th Jan 1928 | Box 11 \ 2 02-page057 | |
| Vehicle vibration, engine noise and central oiling issues on models 18-EX, 19-EX and others, with plans for modifications. | 10th Jan 1928 | Box 11 \ 2 02-page058 | |
| Letter agreeing to the production of the SS model, planning parts classification, and discussing a lubrication failure on the 18-EX. | 15th Jan 1929 | Box 11 \ 2 02-page059 | |
| Modifications for a 20 HP car, arranging photos for an 18-EX car, and an issue with mud in the rear brakes. | 18th Jan 1929 | Box 11 \ 2 02-page060 | |
| Letter regarding testing of Bijur drip plugs and the status of a car that has been pulled to pieces. | 18th Jan 1929 | Box 11 \ 2 02-page061 | |
| Cover memo attaching a report on the 18-EX 'SS' car after a 5,000-mile test. | 1st Jan 1929 | Box 11 \ 2 02-page062 | |
| 5,000-mile performance report on the 18-EX S.S. vehicle. | 1st Jan 1929 | Box 11 \ 2 02-page063 | |
| Performance issues and observations on a vacuum pump, carburetter, water pump, and exhaust manifolds. | 1st Jan 1929 | Box 11 \ 2 02-page064 | |
| Inspection report on issues with the rocker cover, engine suspension, and exhaust system. | 1st Jan 1929 | Box 11 \ 2 02-page065 | |
| The performance, issues, and condition of various vehicle components including the radiator, bonnet, oil pump, and brakes. | 1st Jan 1929 | Box 11 \ 2 02-page066 | |
| Inspection report detailing the condition and performance of various vehicle components including front springs, dampers, steering, and clutch. | 1st Jan 1929 | Box 11 \ 2 02-page067 | |
| Wear and performance issues found in a vehicle's clutch, gearbox, servo motor, propeller shafts, and axles. | 1st Jan 1929 | Box 11 \ 2 02-page068 | |
| Inspection report on vehicle components including brakes, suspension, fuel system, and other mechanisms. | 1st Jan 1929 | Box 11 \ 2 02-page069 | |
| Faults found with the body subframe, electrical system, and cellulose paintwork. | 1st Jan 1929 | Box 11 \ 2 02-page070 | |
| Test report summary detailing mileage, fuel consumption, and tyre performance. | 21th Jan 1929 | Box 11 \ 2 02-page071 | |
| Outstanding items and progress for the 'SS' Production 10,000 Mile Car. | 21th Jan 1929 | Box 11 \ 2 02-page072 | |
| 10,000-mile inspection report on the 18-EX chassis, focusing on the central lubrication system. | 21th Jan 1929 | Box 11 \ 2 02-page073 | |
| Lubrication and bearing condition report for various vehicle components. | 21th Jan 1929 | Box 11 \ 2 02-page074 | |
| The condition and lubrication of front and rear axle bearings and shafts. | 21th Jan 1929 | Box 11 \ 2 02-page075 | |
| Joint wear, drip plug failures, and overall lubrication performance after testing. | 21th Jan 1929 | Box 11 \ 2 02-page076 | |
| Examination report on the condition of dismantled front and rear springs. | 23th Jan 1929 | Box 11 \ 2 02-page077 | |
| List of vehicle faults and points requiring immediate attention sent from Châteauroux, France. | 23th Jan 1929 | Box 11 \ 2 02-page078 | |
| Sketch and notes on modifications to the rear toggle shaft bearing drainage system. | 24th Jan 1929 | Box 11 \ 2 02-page079 | |
| Letter detailing modifications and repairs to the rear brakes of a vehicle. | 24th Jan 1929 | Box 11 \ 2 02-page080 | |
| Outlining a list of noted technical faults requiring attention. | 25th Jan 1929 | Box 11 \ 2 02-page081 | |
| Outstanding issues from a 10,000-mile test report by 'Hancock'. | 25th Jan 1929 | Box 11 \ 2 02-page082 | |
| Drawing and notes on a modification to the drain pipes of a rear toggle shaft bearing. | 26th Jan 1929 | Box 11 \ 2 02-page083 | |
| Status update on car repairs, detailing the completion of the S.S. and upcoming work on a 20-HP. | 26th Jan 1929 | Box 11 \ 2 02-page084 | |
| Vehicle improvements and trials for the SS and G.4. models. | 27th Jan 1929 | Box 11 \ 2 02-page085 | |
| Propeller shaft vibrations and mechanic joint issues on an S.S. car. | 27th Jan 1929 | Box 11 \ 2 02-page086 | |
| Letter from Châteauroux, France, concerning the return of a car, completion of another, and personnel arrangements. | 29th Jan 1929 | Box 11 \ 2 02-page087 | |
| Typed letter detailing the results of vehicle road tests and modifications. | 30th Jan 1929 | Box 11 \ 2 02-page088 | |
| Hand-drawn sketch of a flanged component with handwritten notes indicating design considerations. | 30th Jan 1929 | Box 11 \ 2 02-page089 | |
| Drawing of a better arrangement for the throttle connecting spring. | 5th Feb 1929 | Box 11 \ 2 02-page090 | |
| Letter concerning customs papers for car 18-EX and a comparison of performance issues between cars 19-EX and 18-EX. | 5th Feb 1929 | Box 11 \ 2 02-page091 | |
| Request for the final report on a 10,000 miles test. | 14th Feb 1929 | Box 11 \ 2 02-page092 | |
| Inspection report detailing the condition of bearing surfaces after a 3,500-mile test. | 14th Feb 1929 | Box 11 \ 2 02-page093 | |
| Inspection report detailing the lubrication status and condition of steering, axle, servo, and brake components. | 18th Feb 1929 | Box 11 \ 2 02-page094 | |
| Letter to Mr. J. Adams in France concerning experimental testing logistics, finances, and personnel. | 18th Feb 1929 | Box 11 \ 2 02-page095 | |
| Employee wages and outlining a series of vehicle tests. | 19th Feb 1929 | Box 11 \ 2 02-page096 | |
| Letter discussing a report on the 19-EX car, addressing Bijur lubrication and gearbox oil leak issues. | 19th Feb 1929 | Box 11 \ 2 02-page097 | |
| Instructions for fitting a baffle plate, ordering new tyres, and arranging for car delivery in Paris. | 19th Feb 1928 | Box 11 \ 2 02-page098 | |
| Final report on the 18-EX car after a 10,000 miles test in France. | 19th Feb 1928 | Box 11 \ 2 02-page099 | |
| 18-EX car after a 10,000-mile test in France, detailing engine performance. | 19th Feb 1929 | Box 11 \ 2 02-page100 | |
| The condition of various engine components following a 5000-mile test. | 19th Feb 1929 | Box 11 \ 2 02-page101 | |
| Condition and performance of various vehicle components after testing. | 25th Oct 1936 | Box 11 \ 2 02-page102 | |
| Test report on the performance and wear of various vehicle components following a 5000-mile test. | 25th Oct 1936 | Box 11 \ 2 02-page103 | |
| Test report detailing the condition of various vehicle components like brakes, dampers, petrol tank, and subframe. | 25th Oct 1936 | Box 11 \ 2 02-page104 | |
| Report page detailing the results of a vehicle test, focusing on bodywork and component performance. | 2nd Feb 1929 | Box 11 \ 2 02-page105 | |
| Enclosing two sets of photographs of the 18-EX car taken in France. | 2nd Feb 1929 | Box 11 \ 2 02-page106 | |
| Daily report on the status and mileage of chassis 19 EX from Chateauroux, France. | 23th Feb 1929 | Box 11 \ 2 02-page107 | |
| Telegram from Chateauroux reporting on a successful 599-mile trial with no failures. | 19th Dec 1928 | Box 11 \ 2 02-page108 | |
| Post Office telegram reporting mileage from Hancock to Hives. | 20th Dec 1928 | Box 11 \ 2 02-page109 | |
| Telegram to Hives in Derby from Hancock regarding mileage covered. | 21th Dec 1928 | Box 11 \ 2 02-page110 | |
| Post Office Telegraph form with a handwritten message regarding travel details. | 28th Dec 1928 | Box 11 \ 2 02-page111 | |
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