| Description | Date | Identifier | |
| Inspection report for Bentley Chassis No. 6.B.IV after a 15,000-mile road test, focusing on the condition of the gearbox. | 6th May 1938 | Box 83 \ 2 scan0337 | |
| Condition report on a vehicle's gearbox and rear brakes. | 6th May 1938 | Box 83 \ 2 scan0338 | |
| Inspection report on the condition of rear brakes, rear hubs, and rear springs. | 6th May 1938 | Box 83 \ 2 scan0339 | |
| Photograph of a damaged second motion shaft for a G.B.IV gearbox. | 6th May 1938 | Box 83 \ 2 scan0340 | |
| Photograph showing a cracked servo stud boss on a gearbox casing. | 6th May 1938 | Box 83 \ 2 scan0341 | |
| Photograph showing a broken leaf from an off-side rear spring. | 16th May 1938 | Box 83 \ 2 scan0342 | |
| Request to dismantle and inspect a steering column and box due to a bad knock, suspecting a broken ball in the cam follower. | 16th May 1938 | Box 83 \ 2 scan0343 | |
| Fracture on a Bentley Chassis front brake drum after a 7,000-mile road test. | 19th May 1938 | Box 83 \ 2 scan0344 | |
| Photograph of an off-side front brake drum after a 7000-mile road test. | 8th Jun 1938 | Box 83 \ 2 scan0345 | |
| Technical memo detailing observations and issues with car O.B.IV, including clutch, brake, and throttle problems. | 8th Jun 1938 | Box 83 \ 2 scan0346 | |
| Typed memorandum comparing brake lever ratios and efficiency for O.B.IV (Girling) brakes. | 26th Jul 1938 | Box 83 \ 2 scan0347 | |
| Requesting a comparative petrol consumption test between car models 7.B.V. and 6.B.IV. | 2nd Aug 1938 | Box 83 \ 2 scan0348 | |
| Request to have the baffles refixed in the front silencer of car 6.B.4. | 21th Oct 1938 | Box 83 \ 2 scan0349 | |
| Fitting of Bendix 2 leading shoe brakes and rear axle modifications as an experimental arrangement. | 13th Feb 1939 | Box 83 \ 2 scan0350 | |
| Instruction to remove a complete back axle from vehicle 6.B.IV and send it to the Experimental Fitting Shop. | 15th Feb 1939 | Box 83 \ 2 scan0351 | |
| Request to replace the proper wheel bearings on the rear hubs of 6.B.V. following the completion of tests. | 28th Mar 1939 | Box 83 \ 2 scan0352 | |
| Internal request to remove a starter motor from a car for examination. | 25th Apr 1939 | Box 83 \ 2 scan0353 | |
| Internal request to manufacture and fit new shear pins for a steering tube joint. | 11th May 1939 | Box 83 \ 2 scan0354 | |
| Tests conducted on Bentley II steering gear shear pins to determine maximum load capacity. | 1st Jun 1939 | Box 83 \ 2 scan0355 | |
| Test report on 850 lbs. capacity shear pins being driven over a kerb at various speeds. | 1st Jun 1939 | Box 83 \ 2 scan0356 | |
| Instruction to fit an Armstrong damper to the front brakes for schemes GCD.1231 and GL.893. | 7th Jun 1939 | Box 83 \ 2 scan0357 | |
| Scheme for mounting a gear pump for an oil servo clutch on a 6.B.1V chassis. | 12th Jun 1939 | Box 83 \ 2 scan0358 | |
| Request to fix a loose lever on a N.S.F. aluminium brake shoe and fit a new drum. | 12th Jul 1939 | Box 83 \ 2 scan0359 | |
| The failure of a near side front alum brake drum and liner after a road test. | 14th Jul 1939 | Box 83 \ 2 scan0360 | |
| Photograph of a large, circular, riveted mechanical component, likely a flywheel or clutch drum. | 8th Jan 1940 | Box 83 \ 2 scan0361 | |
| Non-standard features of the 6.B.IV. rear axle. | 8th Jan 1940 | Box 83 \ 2 scan0362 | |
| Experimental features on a car being re-conditioned for resale. | 10th Jan 1940 | Box 83 \ 2 scan0363 | |
| Standardizing experimental features for the M series Bentley. | 5th Feb 1940 | Box 83 \ 2 scan0364 | |
| Brief typed internal memo chasing a reply to a previous correspondence. | 9th Feb 1940 | Box 83 \ 2 scan0365 | |
| Curt memo regarding a repeated request for a document concerning the Bentley Car 6.B.IV. | 22th Aug 1940 | Box 83 \ 2 scan0366 | |
| Note arranging a visit to De Havillands, suggesting alternative days. | 2nd Nov 1936 | Box 83 \ 3 scan0001 | |
| Typed telegram message regarding the rescheduling of a meeting with Dehavillands. | 2nd Nov 1936 | Box 83 \ 3 scan0002 | |
| Arrangements to test a Bentley with improved ride shock absorbers. | 20th Nov 1936 | Box 83 \ 3 scan0003 | |
| The rear wheel arch on a Bentley, requesting a clearance comparison with a Chevrolet. | 25th Nov 1936 | Box 83 \ 3 scan0004 | |
| Request to produce four nuts detailed on document Rm/265 for use on a test rig. | 27th Nov 1936 | Box 83 \ 3 scan0005 | |
| Drawing LeC.5409 for a 4¼ litre Bentley induction pipe, suitable for cylinder head LeC.5367. | 1st Dec 1936 | Box 83 \ 3 scan0006 | |
| Chasing a reply concerning the cost of the Bentley Spring Drive. | 1st Dec 1936 | Box 83 \ 3 scan0007 | |
| Difficulty in costing and standardising the Bentley Spring Drive without a List of Parts (LOP). | 2nd Dec 1936 | Box 83 \ 3 scan0008 | |
| The difficulty of costing the Bentley Spring Drive without a List of Operations (L.O.P.) and piece number. | 2nd Dec 1936 | Box 83 \ 3 scan0009 | |
| Corrective memo clarifying a request for information due to incorrectly quoted numbers and outlining future procedures. | 2nd Dec 1936 | Box 83 \ 3 scan0010 | |
| Status report on the Phantom III 15,000 miles car, detailing various mechanical updates and tests. | 7th Dec 1936 | Box 83 \ 3 scan0011 | |
| The testing and development of valve springs, exhaust systems, bearings, tyre noise reduction, and brakes. | 7th Dec 1936 | Box 83 \ 3 scan0012 | |
| Progress report on the Phantom III chassis, gearbox, and the 25/30 HP model. | 7th Dec 1936 | Box 83 \ 3 scan0013 | |
| Progress report on endurance testing and development for the 25/30 HP, Bentley, and Wraith models. | 7th Dec 1936 | Box 83 \ 3 scan0014 | |
| Progress report on various development aspects of Bentley vehicles. | 7th Dec 1936 | Box 83 \ 3 scan0015 | |
| General report on engine mountings, gearbox costs, alloys, spark plugs, and brake drums. | 7th Dec 1936 | Box 83 \ 3 scan0016 | |
| Completed and ongoing design work for the Bentley III and Present Bentley chassis. | 19th Dec 1936 | Box 83 \ 3 scan0017 | |
| Design position and status report for Bentley chassis components. | 17th Dec 1936 | Box 83 \ 3 scan0018 | |
| Design position status report for Bentley III components. | 10th Dec 1936 | Box 83 \ 3 scan0019 | |
| List of new and replaced parts for modifications to a Bentley Chassis, focusing on the Servo and Damper systems. | 12th Dec 1936 | Box 83 \ 3 scan0020 | |
| Continued list of new and replaced parts with corresponding part numbers, quantities, and status. | 12th Dec 1936 | Box 83 \ 3 scan0021 | |
| Parts list for modifications to a Bentley chassis, covering the gearbox, servo countershaft, and servo mechanism. | 12th Dec 1936 | Box 83 \ 3 scan0022 | |
| Continued parts list detailing new and replaced components for section 6180. | 12th Dec 1936 | Box 83 \ 3 scan0023 | |
| Parts list detailing new and replaced components for modifications to a Bentley Chassis. | 12th Dec 1936 | Box 83 \ 3 scan0024 | |
| Continued parts list detailing new and replaced components for section 6180. | 12th Dec 1936 | Box 83 \ 3 scan0025 | |
| Note detailing points regarding a Bentley chassis test from June 15th. | 30th Dec 1936 | Box 83 \ 3 scan0026 | |
| Fitting of a standard transmission damper on a Hardy-Spicer propeller shaft for the Bentley II chassis. | 11th Jan 1937 | Box 83 \ 3 scan0027 | |
| Continued parts list and instructions for replacing components on a transmission damper and propeller shaft. | 11th Jan 1937 | Box 83 \ 3 scan0028 | |
| Return of a clutch plate and connecting rods, and noting no record for cylinder blocks and pistons. | 19th Feb 1937 | Box 83 \ 3 scan0029 | |
| Table listing the weights of various 1937 Buick parts across different series models. | 24th Mar 1937 | Box 83 \ 3 scan0030 | |
| Query regarding the correct configuration of two breather pipes on a car. | 9th Mar 1937 | Box 83 \ 3 scan0031 | |
| List of modifications, adjustments, and repairs carried out on a vehicle. | 10th Mar 1937 | Box 83 \ 3 scan0032 | |
| The handling characteristics of Bentley cars, detailing tests on a skid pan to address oversteer and understeer. | 11th Mar 1937 | Box 83 \ 3 scan0033 | |
| Car handling tests focusing on achieving understeer through suspension and tyre adjustments, with comparisons to a standard Bentley. | 11th Mar 1937 | Box 83 \ 3 scan0034 | |
| Vehicle handling characteristics, comparing understeer in the Wraith with oversteer in the 25/30, and discussing tyre and rim width tests. | 11th Mar 1937 | Box 83 \ 3 scan0035 | |
| Criticisms and findings on a vehicle's performance, including issues with oil pressure, brakes, oil leaks, heater, and suspension. | 12th Mar 1937 | Box 83 \ 3 scan0036 | |
| List of favourable engine features and a note regarding the 30.HP type filler cap. | 14th Mar 1937 | Box 83 \ 3 scan0037 | |
| The repeated breakage of oil pipes on a vehicle, requiring thicker gauge replacements. | 14th Mar 1937 | Box 83 \ 3 scan0038 | |
| Issue with a sticking change speed lever and proposing solutions. | 16th Mar 1937 | Box 83 \ 3 scan0039 | |
| Bentley big end loadings, referencing an attached polar diagram. | 24th Apr 1937 | Box 83 \ 3 scan0040 | |
| Table of specific engine capacities for Bentley, 25/30, and Phantom III car engines. | 3rd May 1937 | Box 83 \ 3 scan0041 | |
| Comparative table of various automotive engine specifications. | 1st Mar 1937 | Box 83 \ 3 scan0042 | |
| Weight comparison between a 'Square engine' and the 'Phoenix' engine. | 19th May 1937 | Box 83 \ 3 scan0043 | |
| Comparison table of engine dimensions for various American car models. | 25th May 1937 | Box 83 \ 3 scan0044 | |
| The ignition timing for the new governor on Bentley cars. | 25th May 1937 | Box 83 \ 3 scan0045 | |
| Chart detailing the weekly Bentley chassis output programme from the erecting bay to the test department for the latter half of 1937. | 10th Jun 1937 | Box 83 \ 3 scan0046 | |
| Standardisation of the ignition governor hand control range for the 25/30 and Bentley models. | 18th Jun 1937 | Box 83 \ 3 scan0047 | |
| Investigating the patent status of a Lagonda scheme for locating petrol pumps and tools in a receptacle resembling a spare wheel cover. | 22th Jun 1937 | Box 83 \ 3 scan0048 | |
| Whether to scrap or use up 600 existing Pull Rods for the Bentley chassis ignition governor, following a standardisation. | 23th Jun 1937 | Box 83 \ 3 scan0049 | |
| Recommendation to only fit the new Bentley ignition control in response to owner complaints to avoid the cost of scrapping existing stock. | 28th Jun 1937 | Box 83 \ 3 scan0050 | |
| To Martindale regarding disappointing brake test results for a 4 1/4 litre Bentley. | 30th Jun 1937 | Box 83 \ 3 scan0051 | |
| The proposed programme for 200 Bentley M.Series chassis, numbers 2201 to 2400. | 7th Jul 1937 | Box 83 \ 3 scan0052 | |
| Production schedule outlining key dates and targets for the Bentley M-Series Chassis. | 6th Jul 1937 | Box 83 \ 3 scan0053 | |
| Works chart showing the planned weekly output of Bentley chassis from July to December 1937. | 15th Jul 1937 | Box 83 \ 3 scan0054 | |
| Future strategy for the existing Bentley car model, weighing performance against comfort for different markets. | 20th Aug 1937 | Box 83 \ 3 scan0055 | |
| Secret memo discussing a suggested specification for the B.II.A. model while the Bentley III was being finalised. | 21th Aug 1937 | Box 83 \ 3 scan0056 | |
| Proposed specification for the Bentley II.A. model, listing features from customer and company perspectives. | 18th Jun 1937 | Box 83 \ 3 scan0057 | |
| Standardisation of parts for a reduced hand control ignition range. | 18th Jun 1937 | Box 83 \ 3 scan0058 | |
| Note on the nil extra tool cost for bringing the 1st Chassis in 'M' Series into production. | 1st Oct 1937 | Box 83 \ 3 scan0059 | |
| Responding to queries on Bentley chassis, discussing bearing materials and Hykro crankshaft performance. | 1st Oct 1937 | Box 83 \ 3 scan0060 | |
| Design issues and production delays for the Bentley 1.B.V. all-steel car body. | 1st Oct 1937 | Box 83 \ 3 scan0061 | |
| Requesting to delay dismantling a chassis for a potential aero-dynamic body. | 22th Oct 1937 | Box 83 \ 3 scan0062 | |
| Concerns over Bentley sales, public perception, and suggestions for new marketing and publicity strategies. | 25th Oct 1937 | Box 83 \ 3 scan0063 | |
| The provision of Bentley replacement engines at Kingsbury for customer service. | 3rd Nov 1937 | Box 83 \ 3 scan0064 | |
| The status of Bentley engine units for replacements at Kingsbury. | 27th Nov 1937 | Box 83 \ 3 scan0065 | |
| Condition of engines and specifying modification work for engine W.7.Z. | 27th Nov 1937 | Box 83 \ 3 scan0066 | |
| History of bearing tests on Bentley 3 1/2 Litre and Phantom III vehicles. | 16th Nov 1937 | Box 83 \ 3 scan0067 | |
| Bearing troubles and failures for Bentley 3½ Litre and 4¼ Litre engines. | 16th Nov 1937 | Box 83 \ 3 scan0068 | |
| Engine bearing performance and failures for Bentley 4 1/4 Litre and Phantom III models. | 16th Nov 1937 | Box 83 \ 3 scan0069 | |
| Engine component failures and mileage for Phantom III experimental cars. | 16th Nov 1937 | Box 83 \ 3 scan0070 | |
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