| Description | Date | Identifier | |
| Adjustments made to resolve a 40 m.p.h. boom noise in a vehicle. | 5th Dec 1930 | Box 5a \ 2 02-page321 | |
| The performance of new brake shoes and linings on chassis 18.G.IV. | 7th Dec 1930 | Box 5a \ 2 02-page322 | |
| The performance of Chassis 18-G-IV, detailing issues with brakes, tappet clearance, and engine running. | 8th Dec 1930 | Box 5a \ 2 02-page323 | |
| Various mechanical issues observed on chassis 18.2.IV, including exhaust valves, clutch, and axle noise. | 10th Dec 1930 | Box 5a \ 2 02-page324 | |
| Telegram from Roberts confirming the completion of five thousand miles and requesting further instructions. | 11th Dec 1930 | Box 5a \ 2 02-page325 | |
| Request for suitable files to be brought to France for work on engine starter teeth. | 11th Dec 1930 | Box 5a \ 2 02-page326 | |
| Confirming a telegram sent about completing 5000 miles and asking for instructions to continue mileage testing. | 11th Dec 1930 | Box 5a \ 2 02-page327 | |
| Short typed instruction to an individual in France regarding mileage returns. | 12th Dec 1930 | Box 5a \ 2 02-page328 | |
| Short message confirming the completion of a five thousand mile test at Chateauroux. | 12th Dec 1930 | Box 5a \ 2 02-page329 | |
| Customer's car issues regarding fuel consumption, brake inefficiency, and clutch slip. | 12th Dec 1928 | Box 5a \ 2 02-page330 | |
| 10,000-mile test and proposed modifications for car 18G4. | 13th Dec 1930 | Box 5a \ 2 02-page331 | |
| Responding to a telegram about vehicle testing, covering wipers, consumption, brake linings, and clutch slip. | 13th Dec 1930 | Box 5a \ 2 02-page332 | |
| Comparative petrol consumption and pre-ignition tests for chassis 18.S.IV. | 14th Dec 1930 | Box 5a \ 2 02-page333 | |
| Improvements to a car being tested in France, focusing on appearance, cooling, engine smoothness, and rear axle. | 15th Dec 1930 | Box 5a \ 2 02-page334 | |
| Technical report on the performance issues of Chassis 18-G-IV, including booms, clutch, and suspension. | 16th Dec 1930 | Box 5a \ 2 02-page335 | |
| Outlining instructions for completing a 10,000-mile test and other vehicle evaluations in France. | 17th Dec 1930 | Box 5a \ 2 02-page336 | |
| Proposed collection of car 16-G.A. from E. West Wittering. | 17th Dec 1930 | Box 5a \ 2 02-page337 | |
| Faults found with the clutch, valves, and C & A washers for chassis 18.G.IV. | 17th Dec 1930 | Box 5a \ 2 02-page338 | |
| Diagnosis of 'booms' in a vehicle and plans for further testing in Derby and France. | 18th Dec 1930 | Box 5a \ 2 02-page339 | |
| 6,000-mile report on engine 18.9-IV, detailing performance issues and component conditions. | 18th Dec 1930 | Box 5a \ 2 02-page340 | |
| The condition and performance of various engine components including cylinders, pistons, and manifolds. | 18th Dec 1930 | Box 5a \ 2 02-page341 | |
| The performance and required modifications for various engine and chassis components. | 18th Dec 1930 | Box 5a \ 2 02-page342 | |
| The performance and testing of various engine and chassis components. | 18th Dec 1930 | Box 5a \ 2 02-page343 | |
| Performance and condition of various vehicle components during a mileage run. | 18th Dec 1930 | Box 5a \ 2 02-page344 | |
| Flywheel and clutch issues, detailing slipping caused by over-lubrication and subsequent modifications. | 18th Dec 1930 | Box 5a \ 2 02-page345 | |
| Tests and issues with the gearbox, servo motor, propeller shaft, and rear axle. | 18th Dec 1930 | Box 5a \ 2 02-page346 | |
| Test report detailing faults and modifications for a coiled tube, radiator, and radiator shutters. | 18th Dec 1930 | Box 5a \ 2 02-page347 | |
| Condition and modifications to the front axle, brakes, rear brakes, and front shock dampers. | 18th Dec 1930 | Box 5a \ 2 02-page348 | |
| Inspection report covering issues and modifications for dampers, brake equaliser, starter gear, and road springs. | 18th Dec 1930 | Box 5a \ 2 02-page349 | |
| Examination report on the performance of rear springs, petrol tank, instrument board, and windscreen wiper. | 18th Dec 1930 | Box 5a \ 2 02-page350 | |
| Condition report on various vehicle components including electrical systems, engine parts, and bodywork. | 18th Dec 1930 | Box 5a \ 2 02-page351 | |
| Vehicle condition report detailing the bodywork, weight, mileage, and consumption. | 18th Dec 1930 | Box 5a \ 2 02-page352 | |
| Supplement detailing issues with bonnet rattles and hinge design on Staybrite Finish models. | 19th Dec 1930 | Box 5a \ 2 02-page353 | |
| Parts required for car 16-GIV ahead of a 10,000-mile test. | 19th Dec 1930 | Box 5a \ 2 02-page354 | |
| Car examination detailing issues with the clutch, brakes, pre-ignition, and servo gears. | 20th Dec 1930 | Box 5a \ 2 02-page355 | |
| Responding to three technical points regarding the clutch, valve erosion, and exhaust port washers. | 22th Dec 1930 | Box 5a \ 2 02-page356 | |
| Letter regarding the completion of mileage tests on chassis 18-G-IV in France and challenges encountered with testing 'Diable Rubbers'. | 22th Dec 1930 | Box 5a \ 2 02-page357 | |
| Cylinder head hardness, Brinell testing, and a potential valve seat erosion issue. | 24th Dec 1930 | Box 5a \ 2 02-page358 | |
| Four tests conducted on a Rear Shock Damper for Chassis 18-G-IV. | 24th Dec 1930 | Box 5a \ 2 02-page359 | |
| Typed memo from G.W.H. in France reporting on car mileage, a broken exhaust manifold, and issues with exhaust valves. | 27th Dec 1930 | Box 5a \ 2 02-page360 | |
| Query regarding a modification that requires engine removal to access the gearbox. | 5th Jan 1931 | Box 5a \ 2 02-page361 | |
| Difficulty of removing the gearbox due to a design flaw. | 6th Jan 1931 | Box 5a \ 2 02-page362 | |
| Instructions for setting non-squeak brake shoes, including bedding-in and setting screw gap. | 6th Jan 1931 | Box 5a \ 2 02-page363 | |
| Preliminary report on the use of Shell oil in the engine and gearbox of car 18-G4. | 6th Jan 1931 | Box 5a \ 2 02-page364 | |
| Advance report on an issue with an aluminium clip in the rear axle's centralised lubrication system. | 7th Jan 1931 | Box 5a \ 2 02-page365 | |
| Body faults for car 18-G4 fitted with a P.&R. Ward body after 10,000 miles. | 8th Jan 1931 | Box 5a \ 2 02-page366 | |
| The extension of a car's 10,000-mile test and the involvement of Test Department officials. | 9th Jan 1931 | Box 5a \ 2 02-page367 | |
| Road test report on a car's performance after a 300-mile journey, noting issues with speed, thermostatic control, and pitching. | 13th Jan 1931 | Box 5a \ 2 02-page368 | |
| Defects in the coachwork of a Park Ward body on car 18-G-4, requesting an inspection and details on faulty stone guards and bolts. | 14th Jan 1931 | Box 5a \ 2 02-page369 | |
| Letter discussing the investigation of body faults on a car with coachbuilder Park Ward. | 15th Jan 1931 | Box 5a \ 2 02-page370 | |
| Arranging for a car with body faults to be taken to Messrs. Park Wards for inspection. | 16th Jan 1931 | Box 5a \ 2 02-page371 | |
| Arrangements for an inspection of a car with body faults, chassis 18-G4. | 16th Jan 1931 | Box 5a \ 2 02-page372 | |
| 10,000 miles test car report detailing engine, body, springing, and steering performance. | 31th Jan 1931 | Box 5a \ 2 02-page373 | |
| Vehicle test report listing observed faults and performance issues. | 19th Jan 1931 | Box 5a \ 2 02-page374 | |
| Performance and issues of a vehicle after a 10,000-mile test. | 20th Jan 1931 | Box 5a \ 2 02-page375 | |
| Query about the availability of a car in London to inspect body faults with coachbuilder Park Wards. | 26th Jan 1931 | Box 5a \ 2 02-page376 | |
| Advising on the progress of a car being rebuilt and an estimated completion date. | 29th Jan 1931 | Box 5a \ 2 02-page377 | |
| Cover note for a final report on the 10,000-mile running of vehicle 18.G.IV in France. | 6th Feb 1931 | Box 5a \ 2 02-page378 | |
| Summary of faults experienced on the 18.G.IV model and proposed eliminations for the 'Japan' III model. | 6th Feb 1931 | Box 5a \ 2 02-page379 | |
| List of reported failures and proposed modifications for various vehicle components. | 6th Feb 1931 | Box 5a \ 2 02-page380 | |
| Numbered list of vehicle component specifications and modifications, page 3. | 30th Jan 1931 | Box 5a \ 2 02-page381 | |
| 10,000-mile report detailing a list of faults and troubles on vehicle 18.G.IV. | 30th Jan 1931 | Box 5a \ 2 02-page382 | |
| Engine test report detailing tappet clearance, oil leaks, acceleration times, and cylinder head and valve conditions. | 30th Jan 1931 | Box 5a \ 2 02-page383 | |
| Inspection report detailing the condition and wear of various engine components after testing. | 30th Jan 1931 | Box 5a \ 2 02-page384 | |
| Inspection report detailing failures of engine components including cylinders, pistons, and connecting rods after dismantling. | 30th Jan 1931 | Box 5a \ 2 02-page385 | |
| The condition of a crankshaft and low inertia spring drive assembly after testing. | 30th Jan 1931 | Box 5a \ 2 02-page386 | |
| Condition of engine components including the crankcase, bearings, carburettor, and exhaust manifold after testing. | 30th Jan 1931 | Box 5a \ 2 02-page387 | |
| Exhaust manifold failures, exhaust fittings, magneto and dynamo drive, and oil pump performance. | 30th Jan 1931 | Box 5a \ 2 02-page388 | |
| The performance and modifications of a water pump, fan, ignition wires, autovac system, and dashboard. | 30th Jan 1931 | Box 5a \ 2 02-page389 | |
| The condition and performance of steering system components, including the worm and box, and side and cross tubes. | 30th Jan 1931 | Box 5a \ 2 02-page390 | |
| Modifications and performance of the flywheel, clutch, gearbox, and servo mechanism. | 30th Jan 1931 | Box 5a \ 2 02-page391 | |
| The condition and modifications of a servo gear, propeller shaft, rear axle, and brakes. | 30th Jan 1931 | Box 5a \ 2 02-page392 | |
| The performance and modifications of front axle brakes and front shock dampers. | 30th Jan 1931 | Box 5a \ 2 02-page393 | |
| Test and inspection report on shock dampers and road springs, detailing poundage loss and component condition. | 30th Jan 1931 | Box 5a \ 2 02-page394 | |
| The condition and lubrication of front and rear road springs, with a note on the pedal starter motor gear. | 30th Jan 1931 | Box 5a \ 2 02-page395 | |
| Issues and modifications for the bonnet, petrol tank, telegauge, and battery. | 30th Jan 1931 | Box 5a \ 2 02-page396 | |
| Condition report on various vehicle components including the battery, subframe, wing stays, and headlamps following mileage testing. | 30th Jan 1931 | Box 5a \ 2 02-page397 | |
| The condition and performance of the clutch, pedals, radiator, and electrical coil. | 30th Jan 1931 | Box 5a \ 2 02-page398 | |
| Performance and condition of various electrical and mechanical components. | 30th Jan 1931 | Box 5a \ 2 02-page399 | |
| The condition and performance of a vehicle's starter motor, bodywork, tyres, and general running metrics. | 17th Feb 1932 | Box 5a \ 2 02-page400 | |
| Various component failures and issues following a 10,000-mile vehicle test in France. | 17th Feb 1932 | Box 5a \ 2 02-page401 | |
| The performance of thermostatic shutter control and a safety concern regarding an unfused Lucas windscreen wiper. | 14th Apr 1931 | Box 5a \ 2 02-page402 | |
| Post Office telegram sent to Hives at Derby regarding a shipment. | 14th Apr 1931 | Box 5a \ 2 02-page403 | |
| Specification list of departures from standard for a specific car. | 9th Apr 1931 | Box 5a \ 2 02-page404 | |
| Providing feedback on a car, noting rattles, thermostat function, and a recent accident. | 8th May 1931 | Box 5a \ 2 02-page405 | |
| Experimental car being driven to the Works. | 10th Apr 1931 | Box 5a \ 2 02-page406 | |
| Cancelling the previously planned movement of an experimental car. | 10th Apr 1931 | Box 5a \ 2 02-page407 | |
| Springing and a post-accident check on the steering of a vehicle. | 10th Apr 1931 | Box 5a \ 2 02-page408 | |
| Springing of car 18-04, comparing it to the current standard and a trials car. | 13th Apr 1931 | Box 5a \ 2 02-page409 | |
| Test report detailing various noises, vibrations, and poor carburation in a vehicle. | 20th Apr 1931 | Box 5a \ 2 02-page410 | |
| Hand-drawn graph plotting vehicle performance data such as temperature and petrol consumption. | 21th Aug 1934 | Box 5a \ 2 02-page411 | |
| Hand-drawn graph charting vehicle performance data including temperatures, speed, and fuel consumption over several days. | 26th Jul 1934 | Box 5a \ 2 02-page412 | |
| Hand-drawn graph logging vehicle performance metrics over three days in 1934. | 26th Jul 1934 | Box 5a \ 2 02-page413 | |
| Performance and temperature log chart tracking readings every 25 miles over several days. | 26th Jul 1934 | Box 5a \ 2 02-page414 | |
| Hand-drawn graph charting vehicle performance metrics like speed, temperature, and fuel consumption over several days. | 11th Aug 1934 | Box 5a \ 2 02-page415 | |
| Hand-drawn graph charting vehicle performance data including temperatures, petrol consumption, and average speed over a five-day test period. | 11th Aug 1934 | Box 5a \ 2 02-page416 | |
| Graphical log of vehicle performance readings, including temperatures and consumption, taken every 2.5 miles over three days. | 13th Aug 1934 | Box 5a \ 2 02-page417 | |
| Performance log sheet graphing vehicle temperatures, speeds, and petrol consumption over several days. | 13th Aug 1934 | Box 5a \ 2 02-page418 | |
| Indicating the location of previous correspondence. | | Box 5a \ 3 03-page001 | |
| Blank page with a handwritten date notation in the top right corner. | | Box 5a \ 3 03-page002 | |
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