| Description | Date | Identifier | |
| Letter to G.W. Hancock in France regarding car testing logistics and a comparative test for radiator tubes. | 9th Jul 1931 | Box 11 \ 3 03-page422 | |
| Spring performance and engine roughness following a 10,000-mile test. | 9th Jul 1931 | Box 11 \ 3 03-page423 | |
| Oil leak from the N.S. rear shock damper. | 9th Jul 1931 | Box 11 \ 3 03-page424 | |
| Responding to concerns about car safety and handling, discussing test conditions and performance on continental roads. | 9th Jul 1931 | Box 11 \ 3 03-page425 | |
| Undiagnosed leak and a delay in radiator testing due to weather conditions. | 10th Jul 1931 | Box 11 \ 3 03-page426 | |
| High-speed safety, springing, and engine roughness of a 25-EX car. | 10th Jul 1931 | Box 11 \ 3 03-page427 | |
| Reported 28% performance improvement and the link between light springing and tyre wear. | 11th Jul 1931 | Box 11 \ 3 03-page428 | |
| Comparative temperature tests on two different radiators with varying speeds. | 11th Jul 1931 | Box 11 \ 3 03-page429 | |
| Letter discussing a front silencer failure, bonnet modifications, radiator tests, and upcoming travel plans. | 11th Jul 1931 | Box 11 \ 3 03-page430 | |
| Table showing dynamo output in Amps at various speeds (M.P.H.) for warm and hot conditions with lights and wiper active. | 12th Jul 1931 | Box 11 \ 3 03-page431 | |
| Table of dynamo output readings in amps at various speeds (M.P.H.) for warm and hot conditions with head, side and tail lamps on. | 12th Jul 1931 | Box 11 \ 3 03-page432 | |
| Message to Hancock in France requesting a repeat of radiator tests without bonnet ventilation. | 13th Jul 1931 | Box 11 \ 3 03-page433 | |
| Forwarding two telegrams concerning vehicle and radiator testing arrangements. | 14th Jul 1931 | Box 11 \ 3 03-page434 | |
| Radiator performance test results from a climb on the Col-de-la-Faucille. | 14th Jul 1931 | Box 11 \ 3 03-page435 | |
| Providing the results of tests on bonnet shutters for the small tube radiator. | 15th Jul 1931 | Box 11 \ 3 03-page436 | |
| Test results for a small tube radiator with bonnet shutters on the Issoudun Road. | 15th Jul 1931 | Box 11 \ 3 03-page437 | |
| Test results for a small tube radiator on the 25-EX model, detailing temperature readings at 70 MPH. | 14th Jul 1931 | Box 11 \ 3 03-page438 | |
| Air and top water temperature readings for runs using large and small tube radiators. | 14th Jul 1931 | Box 11 \ 3 03-page439 | |
| Test results for a small tube radiator conducted on the Col-de-la-Faucille mountain pass. | 14th Jul 1931 | Box 11 \ 3 03-page440 | |
| Tests with Bonnet Shutters on a Large Tube Radiator on the Issoudun Road. | 16th Jul 1931 | Box 11 \ 3 03-page441 | |
| Test results for a large tube radiator on model 25-EX, comparing performance with shutters open and closed. | 21th Jul 1931 | Box 11 \ 3 03-page442 | |
| Letter to G.W. Hancock in France regarding shock absorber loading, exhaust valve tests, and modifications to the 25 HP and 25-EX models. | 21th Jul 1931 | Box 11 \ 3 03-page443 | |
| Faults discovered in rear shock dampers, engine movement, and steering after testing. | 22th Jul 1931 | Box 11 \ 3 03-page444 | |
| Vehicle steering issues, proposed modifications, and planned experimental work. | 23th Jul 1931 | Box 11 \ 3 03-page445 | |
| Engine performance issues related to weak fuel mixtures, high exhaust valve temperatures and valve stretching. | 23th Jul 1931 | Box 11 \ 3 03-page446 | |
| Car testing, focusing on rear shock absorbers, steering, and exhaust valve performance. | 23th Jul 1931 | Box 11 \ 3 03-page447 | |
| With a sketch detailing a fault where a ball hammers into its seat on a seat damper. | 24th Jul 1931 | Box 11 \ 3 03-page448 | |
| Letter concerning the delayed delivery of a front silencer and resulting expenses. | 24th Jul 1931 | Box 11 \ 3 03-page449 | |
| Investigation into overheating exhaust valves and the theory of cause. | 24th Jul 1931 | Box 11 \ 3 03-page450 | |
| Plan drawing of an exhaust valve with annotations. | 24th Jul 1931 | Box 11 \ 3 03-page451 | |
| Erratic exhaust valve clearances after a 300-mile run and proposed changes to water temperature reporting. | 24th Jul 1931 | Box 11 \ 3 03-page452 | |
| Weak fuel mixture settings, new exhaust valves, and adjustments to shock dampers and steering. | 25th Jul 1931 | Box 11 \ 3 03-page453 | |
| Car repairs, including fitting a new exhaust silencer and tightening loose shock damper levers. | 26th Jul 1931 | Box 11 \ 3 03-page454 | |
| Vehicle issues with distorted valves, steering slack, and shock absorber tests, and arranging for replacement parts. | 27th Jul 1931 | Box 11 \ 3 03-page455 | |
| Cover memo sending a report on a brake test requested by Hs. | 27th Jul 1931 | Box 11 \ 3 03-page456 | |
| Series of tests to diagnose and resolve groaning noises from the rear brakes of a Phantom II model. | 27th Jul 1931 | Box 11 \ 3 03-page457 | |
| Brake drum vibration and groan tests, concluding the back plate is the weakest component. | 28th Jul 1931 | Box 11 \ 3 03-page458 | |
| Letter to a customer regarding a replacement steering column and issues with a petrol gauge. | 28th Jul 1931 | Box 11 \ 3 03-page459 | |
| Steering performance with new tyres, exhaust valve clearances, and awaiting further parts for testing. | 28th Jul 1931 | Box 11 \ 3 03-page460 | |
| Conflicting test reports regarding engine noise and vibration on Chassis 25-EX. | 28th Jul 1931 | Box 11 \ 3 03-page461 | |
| Shock absorber modifications and settings for car 25-EX before it is sent to France. | 29th Jul 1931 | Box 11 \ 3 03-page462 | |
| Faults with a vehicle's battery box, shock dampers, exhaust valves, and steering. | 29th Jul 1931 | Box 11 \ 3 03-page463 | |
| Issues with an exhaust system, petrol pump, and rear shock dampers, including notes on component materials and fittings. | 29th Jul 1931 | Box 11 \ 3 03-page464 | |
| Damper performance and the failure of lubrication for the rear shock absorber connecting links. | 30th Jul 1931 | Box 11 \ 3 03-page465 | |
| Loss of acid in specific battery cells. | 30th Jul 1931 | Box 11 \ 3 03-page466 | |
| Shock absorber performance and potential failures during a 10,000-mile test on the 25-EX vehicle. | 30th Jul 1931 | Box 11 \ 3 03-page467 | |
| Fitting new components, issues with valve clearance, a broken battery box suspension bolt, and feedback on friction plates and new tyres. | 1st Aug 1931 | Box 11 \ 3 03-page468 | |
| Vehicle testing, detailing issues with steering wobble related to tyres, a gearbox oil leak, and shock damper adjustments. | 4th Aug 1931 | Box 11 \ 3 03-page469 | |
| Extensive repairs and modifications made to car 25-EX over a period of three days. | 4th Aug 1931 | Box 11 \ 3 03-page470 | |
| The inspection and repair of a fabric coupling, clutch, and rear shock dampers, page 2. | 4th Aug 1931 | Box 11 \ 3 03-page471 | |
| Engine component issues, suggesting cast iron or steel inserts for valve seats and a method for marking pistons. | 3rd Aug 1931 | Box 11 \ 3 03-page472 | |
| Hand-drawn diagram illustrating a potential issue with a rear damper mechanism. | 3rd Aug 1931 | Box 11 \ 3 03-page473 | |
| Hand-drawn sketch of a Torque Reaction Damper Plate. | 3rd Aug 1931 | Box 11 \ 3 03-page474 | |
| Shock absorbers for models 58-GN and 25-EX, and the development of an adjustable leak. | 4th Aug 1931 | Box 11 \ 3 03-page475 | |
| Clarifying the distinction between vehicle 'booms' and 'engine periods' as felt vibrations. | 4th Aug 1931 | Box 11 \ 3 03-page476 | |
| Issues with 25-EX shock absorbers following a 10,000-mile test. | 4th Aug 1931 | Box 11 \ 3 03-page477 | |
| Summary of minor troubles arising from a 10,000-mile test in France, focusing on exhaust valves and shock absorbers. | 5th Aug 1931 | Box 11 \ 3 03-page478 | |
| Ongoing issues and experiments related to steering, vapour lock, suspension, and a battery box. | 1st Aug 1931 | Box 11 \ 3 03-page479 | |
| Road test report detailing engine knock issues, steering performance, and communications regarding oil supply and testing. | 5th Aug 1931 | Box 11 \ 3 03-page480 | |
| Arrangements for collecting car 25-EX in Paris for a tour. | 5th Aug 1931 | Box 11 \ 3 03-page481 | |
| The 25-EX model at 10,000 miles. | 5th Aug 1931 | Box 11 \ 3 03-page482 | |
| Examination and performance of various engine components. | 5th Aug 1931 | Box 11 \ 3 03-page483 | |
| Servo motor mechanism trials and failures of various exhaust fittings. | 5th Aug 1931 | Box 11 \ 3 03-page484 | |
| Faults and observations on the Bijur system, telegauge, electrical equipment, and petrol tank. | 5th Aug 1931 | Box 11 \ 3 03-page485 | |
| The condition of the starter motor, cut-out, bodywork, subframe, and vehicle performance metrics. | 1st Aug 1931 | Box 11 \ 3 03-page486 | |
| The status, upcoming trials, and modifications for car 25-EX. | 1st Aug 1931 | Box 11 \ 3 03-page487 | |
| Arrangements for forwarding car 25-EX to Paris and preparing its papers for Switzerland. | 6th Aug 1931 | Box 11 \ 3 03-page488 | |
| Arranging the handover of a car in Paris for a trip to Switzerland and subsequent examination. | 6th Aug 1931 | Box 11 \ 3 03-page489 | |
| Letter to G.W. Hancock regarding progress on torque reaction dampers, shock dampers, and arranging a meeting for car 19-GIV. | 6th Aug 1931 | Box 11 \ 3 03-page490 | |
| Battery box suspension failure which resulted in acid loss and the destruction of the battery. | 6th Aug 1931 | Box 11 \ 3 03-page491 | |
| Issues and potential improvements for torque reaction dampers. | 6th Aug 1931 | Box 11 \ 3 03-page492 | |
| Potential issues with an engine anchorage design and suggesting a return to an older type. | 6th Aug 1931 | Box 11 \ 3 03-page493 | |
| Sketch illustrating the movement of a plate due to being rocked over and insufficient clearance. | 10th Aug 1931 | Box 11 \ 3 03-page494 | |
| Petrol vaporization issues in the glass-container of car 25-EX during strenuous driving conditions. | 10th Aug 1931 | Box 11 \ 3 03-page495 | |
| Arranging the schedule and personnel for testing the 25-EX car in France. | 8th Aug 1931 | Box 11 \ 3 03-page496 | |
| Travel arrangements to Paris for a car trial and clarifying its subsequent use and return. | 10th Aug 1931 | Box 11 \ 3 03-page497 | |
| Arrangements for a trip to Paris, including car preparations, financial instructions and a rendezvous. | 1st Aug 1931 | Box 11 \ 3 03-page498 | |
| Instructions to alter the position of a petrol supply pipe to prevent evaporation. | 1st Aug 1931 | Box 11 \ 3 03-page499 | |
| Pronounced knocking sound from the reaction dampers due to high pressure on dry friction plates. | 1st Aug 1931 | Box 11 \ 3 03-page500 | |
| Altering the petrol pipe on model 25-EX to prevent pump failure due to petrol vapourising. | 1st Aug 1931 | Box 11 \ 3 03-page501 | |
| Requesting more information about proposed changes to the lubrication system and a front battery suspension failure following a 10,000 mile test in France. | 12th Aug 1931 | Box 11 \ 3 03-page502 | |
| Acceleration, petrol consumption, and braking figures for the 25-EX car. | 7th Aug 1931 | Box 11 \ 3 03-page503 | |
| Brake test results showing stopping distances from various speeds. | 7th Aug 1931 | Box 11 \ 3 03-page504 | |
| Data sheet documenting acceleration test results for a low compression head. | 11th Aug 1931 | Box 11 \ 3 03-page505 | |
| Acceleration test results with a high compression head. | 10th Aug 1931 | Box 11 \ 3 03-page506 | |
| Arranging the handover of a car for a 10,000-mile trial. | 18th Aug 1931 | Box 11 \ 3 03-page507 | |
| Brief typed memo confirming travel arrangements for a trip to Paris. | 19th Aug 1931 | Box 11 \ 3 03-page508 | |
| Confirming a wire was sent to arrange for a car to be in Paris. | 19th Aug 1931 | Box 11 \ 3 03-page509 | |
| Confirming the dispatch of drawings for radiator mountings and discussing testing the speedometer drive. | 19th Aug 1931 | Box 11 \ 3 03-page510 | |
| Letter to G.W. Hancock in France concerning car issues, modifications, and the return of car 25-EX. | 28th Aug 1931 | Box 11 \ 3 03-page511 | |
| Response to a report on the performance issues of car model 25-EX, covering steering, tyres, and vibrations. | 29th Aug 1931 | Box 11 \ 3 03-page512 | |
| Test results for radiator and bonnet movement, specifically concerning the wear on rubber parts. | 31th Aug 1931 | Box 11 \ 3 03-page513 | |
| Car modifications and faults in France, seeking clarification on required work and reporting on damper and clutch issues. | 31th Aug 1931 | Box 11 \ 3 03-page514 | |
| Broken soldered joints on Bijur supply pipes with a recommendation for brazing. | 31th Aug 1931 | Box 11 \ 3 03-page515 | |
| Letter discussing arrangements with Capt. Hallan to test drive car 25-EX in Brittany and the fitting of new valve springs. | 31th Aug 1931 | Box 11 \ 3 03-page516 | |
| From 'Sg' to 'Hs' regarding the 10,000-mile test of car 25-EX, discussing noise improvements and persistent overheating issues. | 1st Sep 1931 | Box 11 \ 3 03-page517 | |
| The 1,100-mile test of car 25-EX in France, detailing engine, brake, and cooling performance. | 27th Aug 1931 | Box 11 \ 3 03-page518 | |
| Test report on radiator cooling, frame flex, steering, springing, and damping performance. | 27th Aug 1931 | Box 11 \ 3 03-page519 | |
| Report discussing issues with dampers, replenishing valves, a loose shock absorber, and driver positioning. | 27th Aug 1931 | Box 11 \ 3 03-page520 | |
| The 15,000-mile road test of the 25-EX model in France. | 18th Sep 1931 | Box 11 \ 3 03-page521 | |
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