| Description | Date | Identifier | |
| Testing the necessity of sheet metal stone guards on the jacks of Wraith cars. | 5th Feb 1938 | Box 108 \ 1 scan0311 | |
| Fitting of tyres to vehicle 26.G.VI, noting the date and speedometer reading. | 5th Feb 1938 | Box 108 \ 1 scan0312 | |
| Fouling issues with undersheets on the 26.G.VI car model and requesting modifications. | 7th Feb 1938 | Box 108 \ 1 scan0313 | |
| Poor petrol consumption on car 26.G.VI, comparing it to other models and detailing experiments to improve it. | 7th Feb 1938 | Box 108 \ 1 scan0314 | |
| Mileage testing arrangements at Chateauroux for an overdrive gearbox. | 7th Feb 1938 | Box 108 \ 1 scan0315 | |
| The forwarding of a special water connection hose for fitting. | 8th Feb 1938 | Box 108 \ 1 scan0316 | |
| Causes and remedies for servo judders on a Wraith model. | 9th Feb 1938 | Box 108 \ 1 scan0317 | |
| Sending a failed valve spring and brake rod for analysis, test delays on a Wraith, and a request for a higher axle ratio. | 9th Feb 1938 | Box 108 \ 1 scan0318 | |
| Confirming the fitting of Delco Coil and Lodge Plugs for the 25/30 HP model's electrical equipment. | 10th Feb 1938 | Box 108 \ 1 scan0319 | |
| Confirming the removal of a stoneguard from the N.S.R. hydraulic jack for a 25/30 HP model. | 10th Feb 1938 | Box 108 \ 1 scan0320 | |
| Fitting a new radiator and fan belt for the 25/30 HP model's cooling system. | 10th Feb 1938 | Box 108 \ 1 scan0321 | |
| Loud clatter in the steering column of a 25/30 HP model. | 10th Feb 1938 | Box 108 \ 1 scan0322 | |
| Brake system adjustments, issues, and proposed modifications for a 25/30 HP model. | 10th Feb 1938 | Box 108 \ 1 scan0323 | |
| Exhaust pipe fouling issue on a 25/30 HP model due to the split type joints used. | 10th Feb 1938 | Box 108 \ 1 scan0324 | |
| Steering clatter issue on the 25/30 HP model, tracing the cause and requesting modified parts. | 10th Feb 1938 | Box 108 \ 1 scan0325 | |
| And comparing petrol consumption figures for a new series of chassis. | 10th Feb 1938 | Box 108 \ 1 scan0326 | |
| Unsatisfactory door catches and luggage flap issues on 25/30 HP models. | 10th Feb 1938 | Box 108 \ 1 scan0327 | |
| Issues with 'Silent Travel' door catches fitted to a standard Bentley body. | 7th Feb 1938 | Box 108 \ 1 scan0328 | |
| Technical note detailing issues with the 25/30 HP engine mounting and proposing design modifications with a sketch. | 10th Feb 1938 | Box 108 \ 1 scan0329 | |
| Complete engine failure due to a sheared pin in the Delco-Remy distributor spindle. | 2nd Feb 1938 | Box 108 \ 1 scan0330 | |
| Oil leak from an A.C. Bye-Pass Oil Filter, its replacement, and an analysis of oil samples. | 11th Feb 1938 | Box 108 \ 1 scan0331 | |
| Letter detailing vehicle test results and required improvements after a run from Dieppe. | 11th Feb 1938 | Box 108 \ 1 scan0332 | |
| Telegram to Switzerland inquiring about sending higher ratio gears for a Phantom axle to France. | 11th Feb 1938 | Box 108 \ 1 scan0333 | |
| Noise issues with an American-made car heater/de-mister and requesting performance test feedback. | 11th Feb 1938 | Box 108 \ 1 scan0334 | |
| Letter detailing points for attention on a car following a test run from Dieppe. | 11th Feb 1938 | Box 108 \ 1 scan0335 | |
| Telegram received by telephone regarding arrangements for Wraith and Phantom cars. | 12th Feb 1938 | Box 108 \ 1 scan0336 | |
| Telegram received by telephone discussing axle gears and ratios for Wraith and Phantom cars. | 12th Feb 1938 | Box 108 \ 1 scan0337 | |
| Telegram regarding arrangements for a Wraith car with a Phantom axle and altered gear ratios. | 12th Feb 1938 | Box 108 \ 1 scan0338 | |
| Fitting of Wraith and Phantom III axle gears, axle ratios, and wheels on various cars. | 12th Feb 1938 | Box 108 \ 1 scan0339 | |
| Requesting parts for trial to reduce pedal vibration on the 25/30 HP model. | 12th Feb 1938 | Box 108 \ 1 scan0340 | |
| Diagram for a reaction damper to reduce gearbox sideshake and gear lever movements on a 25/30 HP model. | 12th Feb 1938 | Box 108 \ 1 scan0341 | |
| Technical memo detailing investigations and adjustments to the brake system on a 25/30 HP model. | 13th Feb 1938 | Box 108 \ 1 scan0342 | |
| Requesting one of three potential solutions for a recurring exhaust pipe fouling issue on a 25/30 HP vehicle. | 13th Feb 1938 | Box 108 \ 1 scan0343 | |
| Evaluating the performance of a Buick Heater and De-Mister system, including a sketch of its effective area on a windscreen. | 13th Feb 1938 | Box 108 \ 1 scan0344 | |
| Engine mounting, specifically rubber side location for the gearbox and rattle isolation. | 14th Feb 1938 | Box 108 \ 1 scan0345 | |
| Requesting the forwarding of a rubber hose bend and pipe to Chateauroux for fitting to a car. | 15th Feb 1938 | Box 108 \ 1 scan0346 | |
| Axle ratio experiment on a 25/30 HP car by fitting larger tyres to simulate the effects of different gears. | 14th Feb 1938 | Box 108 \ 1 scan0347 | |
| Confirming a telegram about a damaged hydraulic jack pipe fouling the rear brake rod on a 25/30 HP model. | 14th Feb 1938 | Box 108 \ 1 scan0348 | |
| Requesting two longer rods for car WRAITH 26.G.VI in France. | 15th Feb 1938 | Box 108 \ 1 scan0349 | |
| Dispatch and fitting of water connection parts for a new radiator matrix unit. | 15th Feb 1938 | Box 108 \ 1 scan0350 | |
| Supply of parts for a 26.G.VI exhaust system and future modifications for the Wraith car. | 15th Feb 1938 | Box 108 \ 1 scan0351 | |
| Issue with car door locks of the slam type flying open. | 15th Feb 1938 | Box 108 \ 1 scan0352 | |
| Repeated failure of a Delco part and the plan for replacement and investigation. | 15th Aug 1938 | Box 108 \ 1 scan0353 | |
| Communication regarding the dispatch of a new Delco distributor to Waller in Chateauroux. | 15th Feb 1938 | Box 108 \ 1 scan0354 | |
| Cause and potential solution for a steering clatter issue on certain car models. | 16th Feb 1938 | Box 108 \ 1 scan0355 | |
| Delco distributor failure and questioning a modification to contact breaker arms. | 16th Feb 1938 | Box 108 \ 1 scan0356 | |
| Wraith brake judders and a suggested diagnostic action. | 17th Feb 1938 | Box 108 \ 1 scan0357 | |
| Telegram received by telephone informing that Delco distributors have not yet arrived in Paris. | 17th Feb 1938 | Box 108 \ 1 scan0358 | |
| The failure of Delco distributors and contact breaker arms, detailing the investigation and replacement actions taken. | 17th Feb 1938 | Box 108 \ 1 scan0359 | |
| Typed telegram addressed to Waller in Chateauroux regarding a Delco repair. | 17th Feb 1938 | Box 108 \ 1 scan0360 | |
| Query regarding the potential causes of car doors flying open. | 17th Feb 1938 | Box 108 \ 1 scan0361 | |
| Telegram advising that a Delco distributor has not yet arrived in Paris. | 11th Feb 1938 | Box 108 \ 1 scan0362 | |
| New washer for a special filler cap and a known defect with a curved rubber water connection. | 18th Feb 1938 | Box 108 \ 1 scan0363 | |
| Instructions and modifications for Wraith brake settings and lever positions. | 18th Feb 1938 | Box 108 \ 1 scan0364 | |
| 15,000-mile test in France, comparing the Wraith and Bentley models, with a focus on the Wraith's performance. | 18th Feb 1938 | Box 108 \ 1 scan0365 | |
| Test report on a car's performance, detailing issues with suspension and benefits of recent modifications. | 18th Feb 1938 | Box 108 \ 1 scan0366 | |
| Technical report on brake performance and coachwork issues, including locks and body rattles. | 18th Feb 1936 | Box 108 \ 1 scan0367 | |
| Trying a new look on B.III and B.50 bodies. | 18th Feb 1938 | Box 108 \ 1 scan0368 | |
| Replacement Delco distributor for a 25/30 HP model due to a sheared pin. | 18th Feb 1938 | Box 108 \ 1 scan0369 | |
| Responding to questions about door lock issues on the 25/30 HP model. | 19th Feb 1938 | Box 108 \ 1 scan0370 | |
| Gear lever rattles on the 25/30 HP model, distinguishing them from induced vibrations. | 19th Feb 1938 | Box 108 \ 1 scan0371 | |
| Cause of rattles in the 25/30 HP gear lever. | 19th Feb 1938 | Box 108 \ 1 scan0372 | |
| Seeking clarification on reversing the side steering tube for a 25/30 HP car. | 21th Feb 1938 | Box 108 \ 1 scan0373 | |
| Ongoing issues and solutions for Wraith and Bentley vehicles. | 21th Feb 1938 | Box 108 \ 1 scan0374 | |
| Modifying a 25/30 HP exhaust system, detailing issues with dismantling and welding repairs. | 21th Feb 1938 | Box 108 \ 1 scan0375 | |
| Recurring fault where the gearbox jumps out of third gear in a 25/30 HP vehicle. | 21th Feb 1938 | Box 108 \ 1 scan0376 | |
| Requesting confirmation to reverse the side steering tube for a 25/30 HP car. | 21th Feb 1938 | Box 108 \ 1 scan0377 | |
| Issues with a 25/30 HP ignition distributor and a potential change-over. | 21th Feb 1938 | Box 108 \ 1 scan0378 | |
| Recurring gearbox issue where third gear disengages on a 25/30 HP model. | 21th Feb 1938 | Box 108 \ 1 scan0379 | |
| Reporting on the performance of a new bakelite filler cap and radiator matrix for a 25/30 HP car's cooling system. | 21th Feb 1938 | Box 108 \ 1 scan0380 | |
| Car performance and gear ratio report detailing tests on valve bounce and speeds with different tyre sizes. | 22th Feb 1938 | Box 108 \ 1 scan0381 | |
| Acceleration performance data comparing two different tyre sizes. | 22th Feb 1938 | Box 108 \ 1 scan0382 | |
| Incorrectly marked dip-sticks and the correct oil level for the Wraith gearbox. | 22th Feb 1938 | Box 108 \ 1 scan0383 | |
| Telegram received by telephone regarding a request for stronger valve springs to prevent bounce causing issues with exhaust valves. | 22th Feb 1938 | Box 108 \ 1 scan0384 | |
| Typed message requesting a phone call regarding Chateauroux, signed by W. A. Robotham. | 22th Feb 1938 | Box 108 \ 1 scan0385 | |
| Instructions for using a Delco coil on a Wraith model pending an improved coil. | 22th Feb 1938 | Box 108 \ 1 scan0386 | |
| Telegram update regarding mileage and parts fitted to a vehicle. | 22th Feb 1936 | Box 108 \ 1 scan0387 | |
| Telegram from Chateauroux requesting stronger valve springs due to bounce and stretching exhaust valves. | 22th Feb 1938 | Box 108 \ 1 scan0388 | |
| Telegram from Chateauroux reporting the mileage covered by a Delco coil. | 22th Feb 1938 | Box 108 \ 1 scan0389 | |
| Confirmation of a telegram regarding a fitted Delco coil and mileage covered. | 22th Feb 1938 | Box 108 \ 1 scan0390 | |
| Car performance and gear ratio for a 25/30 HP model, comparing different tyre sizes and valve bounce. | 22th Feb 1938 | Box 108 \ 1 scan0391 | |
| Comparison of acceleration performance figures with two different tyre sizes. | 22th Feb 1938 | Box 108 \ 1 scan0392 | |
| Adjustments made to a brake system, detailing changes to rod lengths and component settings. | 22th Feb 1938 | Box 108 \ 1 scan0393 | |
| Adjustments and observations on a vehicle's braking system and related components. | 23th Feb 1938 | Box 108 \ 1 scan0394 | |
| Alterations to brake settings on a 25/30 HP model to stop servo judders. | 23th Feb 1938 | Box 108 \ 1 scan0395 | |
| Test report on the effect of undershields on various vehicle temperatures for a 25/30 HP model. | 23th Feb 1938 | Box 108 \ 1 scan0396 | |
| Fitting a new ignition distributor and a fault found on the previous Delco unit. | 23th Feb 1938 | Box 108 \ 1 scan0397 | |
| Note detailing the failure of a Delco governor and its replacement with a Rolls-Royce distributor. | 23th Feb 1938 | Box 108 \ 1 scan0398 | |
| Requesting the despatch of 6 Wraith exhaust valves to Waller by Air Mail. | 23th Feb 1938 | Box 108 \ 1 scan0399 | |
| Investigating steering wobble and component fouling on car chassis 6.B.1V and 26.G.V1. | 23th Feb 1938 | Box 108 \ 1 scan0400 | |
| Issues with brakes, Bentley carburation, Wraith tyres, and engine endurance test results. | 23th Feb 1938 | Box 108 \ 1 scan0401 | |
| Brake modifications and parts for Bentley and Wraith models to address judder issues. | 23th Feb 1938 | Box 108 \ 1 scan0402 | |
| The dispatch of modified bottom tappets and valve springs to resolve a valve bounce issue, with instructions for comparative testing. | 23th Feb 1938 | Box 108 \ 1 scan0403 | |
| Engine performance issues like misfiring, valve bounce, and potential component replacements. | 23th Feb 1938 | Box 108 \ 1 scan0404 | |
| The failure of a second Delco distributor due to a sheared pin and the anticipated risk of the same failure in a new distributor. | 23th Feb 1938 | Box 108 \ 1 scan0405 | |
| Telegram reporting a sheared pin found in a Delco distributor. | 23th Feb 1938 | Box 108 \ 1 scan0406 | |
| Sticking issue with a 25/30 HP radiator's Bakelite filler cap and the subsequent water level observations. | 23th Feb 1938 | Box 108 \ 1 scan0407 | |
| Dispatch of a tool for testing a Wraith Car in France. | 23th Feb 1938 | Box 108 \ 1 scan0408 | |
| Alterations to brake settings to cure servo judders on a 25/30 HP model. | 23th Feb 1938 | Box 108 \ 1 scan0409 | |
| Telegram received by telephone concerning a sheared pinion. | 1st Feb 1938 | Box 108 \ 1 scan0410 | |
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