| Description | Date | Identifier | |
| Letter from Ethyl Export Corporation discussing fuel octane ratings and lead content across Europe. | 4th Sep 1935 | Box 91 \ 4 scan0241 | |
| The Spectre fan's insufficient cooling, proposing a modification using standard Phantom fan blades. | 5th Sep 1935 | Box 91 \ 4 scan0242 | |
| Car's performance during testing in France, particularly its behaviour over bumps and other failures. | 6th Sep 1935 | Box 91 \ 4 scan0243 | |
| Typed message to Hancock in France regarding the 'Spectre' vehicle and a Van Vooren body. | 10th Sep 1935 | Box 91 \ 4 scan0244 | |
| Letter to G.W. Hancock regarding car modifications, parts shipment, and steering maintenance. | 10th Sep 1935 | Box 91 \ 4 scan0245 | |
| Specifications for the Spectre Unit for No. 3 Chassis, detailing flywheel, ignition, and valve requirements. | 10th Sep 1935 | Box 91 \ 4 scan0246 | |
| Telegram with a handwritten message regarding travel arrangements and a cool radiator. | 21th Aug 1935 | Box 91 \ 4 scan0247 | |
| And comparing steering lock and turning circle specifications for Spectre models. | 12th Sep 1935 | Box 91 \ 4 scan0248 | |
| Modification to front wheel steering levers for a Spectre II car for France. | 12th Sep 1935 | Box 91 \ 4 scan0249 | |
| Chart logging vehicle performance metrics including temperatures, consumption, and speed during tests. | 26th Jul 1935 | Box 91 \ 4 scan0250 | |
| Performance and temperature data log chart for 'SPECTRE 3' vehicle road tests. | 6th Sep 1935 | Box 91 \ 4 scan0251 | |
| Performance test graph for Spectre 3, tracking consumption, temperatures, and speed over four days. | 10th Sep 1935 | Box 91 \ 4 scan0252 | |
| Graph of engine oil, water, and air temperatures recorded at a constant speed. | 6th Jul 1935 | Box 91 \ 4 scan0253 | |
| 20,000-mile test report from France on the Spectre model, detailing suspension and engine failures. | 15th Sep 1935 | Box 91 \ 4 scan0254 | |
| Performance issues and criticisms of carburettors, oil filters, and engine components. | 15th Sep 1935 | Box 91 \ 4 scan0255 | |
| Engine design suggestions and a list of failures that occurred during mileage testing. | 15th Sep 1935 | Box 91 \ 4 scan0256 | |
| List of faults found on a vehicle, covering front dampers, suspension, steering, gearbox, and clutch. | 15th Sep 1935 | Box 91 \ 4 scan0257 | |
| List of vehicle faults identified during an inspection, covering dampers, torsion rods, springs, axle, exhaust, and wheels. | 15th Sep 1935 | Box 91 \ 4 scan0258 | |
| List of modifications and items requiring attention for the engine and front dampers. | 15th Sep 1935 | Box 91 \ 4 scan0259 | |
| Findings and modifications on vehicle components. | 15th Sep 1935 | Box 91 \ 4 scan0260 | |
| The condition and performance of the rear axle, wheels, servo, steering, and clutch components. | 15th Sep 1935 | Box 91 \ 4 scan0261 | |
| Findings on the clutch transmission, gearbox, and brakes after mileage testing. | 15th Sep 1935 | Box 91 \ 4 scan0262 | |
| Condition report on a vehicle's rear axle, transmission, battery, and bodywork after mileage. | 15th Sep 1935 | Box 91 \ 4 scan0263 | |
| Performance and consumption report for the car Spectre 3. | 16th Sep 1935 | Box 91 \ 4 scan0264 | |
| Problems with spherical type pipe unions, specifically on the Spectre car. | 16th Sep 1935 | Box 91 \ 4 scan0265 | |
| Typed memo to Mr. A.B. Roberts regarding vehicle maintenance and usage instructions for several cars. | 16th Sep 1935 | Box 91 \ 4 scan0266 | |
| Request to measure the load required to move specific gearbox sleeves on a Spectre III during dismantling. | 18th Sep 1935 | Box 91 \ 4 scan0267 | |
| Front suspension inner lever failure on the 'Spectre' model after a 20,000-mile test run. | 25th Sep 1935 | Box 91 \ 4 scan0268 | |
| Photograph showing two broken components with their corresponding test mileage and duration. | 25th Sep 1935 | Box 91 \ 4 scan0269 | |
| Index report detailing the condition of various vehicle components after a 20,000-mile road test in France. | 25th Sep 1935 | Box 91 \ 4 scan0270 | |
| Strip examination report of Engine Unit No.5 after a 20,000 mile road test in France. | 25th Sep 1935 | Box 91 \ 4 scan0271 | |
| Strip examination report following a 20,000-mile road test in France (page 2). | 25th Sep 1935 | Box 91 \ 4 scan0272 | |
| Inspection report detailing the condition of carburettors, flywheel, and clutch components. | 25th Sep 1935 | Box 91 \ 4 scan0273 | |
| The condition of the withdrawal mechanism and engine coupling. | 25th Sep 1935 | Box 91 \ 4 scan0274 | |
| Photographs of Spectre Unit 5 main bearings after a 20,000-mile road test in France. | 5th Oct 1935 | Box 91 \ 4 scan0275 | |
| Blueprint detailing a crack failure on a Spectre 5 unit after a 20,000-mile road test in France. | 5th Oct 1935 | Box 91 \ 4 scan0276 | |
| Drawing of a pressure ring showing distortion and surface cracks following a 20,000-mile road test in France. | 4th Mar 1935 | Box 91 \ 4 scan0277 | |
| Sketch showing the failure of teeth on a starting dog hub after a 20,000-mile test in France. | 24th Sep 1935 | Box 91 \ 4 scan0278 | |
| Valve spring poundages and weakening after a 20,000-mile road test in France. | 4th Oct 1935 | Box 91 \ 4 scan0279 | |
| Data sheet showing connecting-rod bearing clearances before and after a 10,000-mile test in France. | 29th Sep 1935 | Box 91 \ 4 scan0280 | |
| Piston dimensions for the Spectre 5 unit, showing measurements before and after testing. | 3rd Oct 1935 | Box 91 \ 4 scan0281 | |
| Index detailing the condition of various gearbox and transmission unit components. | 3rd Oct 1935 | Box 91 \ 4 scan0282 | |
| Detailed condition report on a gearbox, including wear measurements for various components. | 3rd Oct 1935 | Box 91 \ 4 scan0283 | |
| Condition report on vehicle mechanisms including lubrication, gears, brakes, servo motor, and propeller shaft. | 3rd Oct 1935 | Box 91 \ 4 scan0284 | |
| Condition report for a vehicle's chassis, axles, suspension, and brake gear. | 3rd Oct 1935 | Box 91 \ 4 scan0285 | |
| Condition report on various frame, suspension, and steering components following dismantling. | 3rd Oct 1935 | Box 91 \ 4 scan0286 | |
| Post-test condition report detailing spring poundages and wear on various axle and brake components. | 3rd Oct 1935 | Box 91 \ 4 scan0287 | |
| Condition report detailing wear and damage on rear brake, axle, and spring components. | 3rd Oct 1935 | Box 91 \ 4 scan0288 | |
| Condition report detailing wear and damage on various vehicle components including springs, dampers, controls and piping. | 5th Jun 1935 | Box 91 \ 4 scan0289 | |
| Blueprint of the 'Spectre 3' chassis frame showing damage noted after a 20,000-mile road test in France. | 5th Jun 1935 | Box 91 \ 4 scan0290 | |
| Sketch showing the failure of a front suspension main lever after a 20,000-mile road test. | 2nd Oct 1935 | Box 91 \ 4 scan0291 | |
| Diagram of a suspension bracket and moulding showing wear after a 20,000-mile road test. | 3rd Jun 1935 | Box 91 \ 4 scan0292 | |
| Diagram and measurements of Spectre (3) car rear springs after a 20,000-mile road test in France. | 7th Oct 1926 | Box 91 \ 4 scan0293 | |
| Condition report on various electrical components, including the starter motor, dynamo, and regulator. | 7th Oct 1926 | Box 91 \ 4 scan0294 | |
| Condition report on the Distributor & Contact Breaker assembly and its components. | 7th Oct 1926 | Box 91 \ 4 scan0295 | |
| Comparison of the maximum body/enclosed limousine on Spectre, P.II, and 25-HP chassis. | 1st Mar 1934 | Box 92 \ 1 scan0001 | |
| Comparing the body dimensions of the 'Spectre' model with the latest Phantom II and 25-HP models. | 1st Mar 1934 | Box 92 \ 1 scan0002 | |
| Design proposals for the front and rear appearance of the 'Spectre' model. | 28th Mar 1934 | Box 92 \ 1 scan0003 | |
| Front wing suspension, wheelbase specifications, and chassis modifications for various car models. | 26th May 1934 | Box 92 \ 1 scan0004 | |
| Mock-up and wing design for the SPECTRE model, involving collaboration with coachbuilders. | 5th Apr 1934 | Box 92 \ 1 scan0005 | |
| Naming of the first Spectre chassis as 30-EX and its specification for a Park Ward enclosed drive limousine body. | 6th Jun 1934 | Box 92 \ 1 scan0006 | |
| The body design and modifications for the first Spectre 30-EX chassis. | 8th Jun 1934 | Box 92 \ 1 scan0007 | |
| Body and seat support modifications to accommodate the Japan 3 gearbox. | 16th Jun 1934 | Box 92 \ 1 scan0008 | |
| Alterations to the Spectre body and petrol tank for an enclosed drive limousine. | 16th Jun 1934 | Box 92 \ 1 scan0009 | |
| Confirming that Park Ward & Co. found the filler for the Spectre body and petrol tank to be satisfactory for the coachwork. | 21th Jun 1934 | Box 92 \ 1 scan0010 | |
| The layout drawings for the Spectre's front wings and valences. | 3rd Jul 1934 | Box 92 \ 1 scan0011 | |
| Plan and elevation for the Spectre's front wings and valences and a reduction in frame length. | 6th Jul 1934 | Box 92 \ 1 scan0012 | |
| The dispatch of drawings for 'Spectre' front wings to coachbuilders Park Ward & Co. | 1st Aug 1934 | Box 92 \ 1 scan0013 | |
| Requesting permission for a lorry to collect a Spectre chassis body from Messrs. Park Ward. | 3rd Aug 1934 | Box 92 \ 1 scan0014 | |
| Modifications for a Spectre luggage carrier and petrol tank filler. | 24th Jul 1934 | Box 92 \ 1 scan0015 | |
| Difficulties encountered during the body mounting on the first Spectre Chassis 30-EX. | 24th Aug 1934 | Box 92 \ 1 scan0016 | |
| Various fitting and assembly issues, including horns, lubrication, headlamps, wing stays, and suspension. | 24th Aug 1934 | Box 92 \ 1 scan0017 | |
| List of technical observations and suggested modifications for a vehicle body, including issues with switches, levers, the radiator, and ventilation. | 24th Aug 1934 | Box 92 \ 1 scan0018 | |
| Suggestion to modify insulation using an asbestos steel sheet and reducing an insulating cavity. | 24th Aug 1934 | Box 92 \ 1 scan0019 | |
| The design and fitting of a luggage grid for the Spectre model. | 12th Sep 1934 | Box 92 \ 1 scan0020 | |
| Design and construction of two new bodies for the Spectre experimental chassis. | 13th Sep 1934 | Box 92 \ 1 scan0021 | |
| Front-end styling of the Spectre model, comparing it to the Phantom and proposing design changes. | 15th Sep 1934 | Box 92 \ 1 scan0022 | |
| Car body styling, aerodynamics, and dimensional considerations, comparing with competitors and detailing proposed changes to models. | 15th Sep 1934 | Box 92 \ 1 scan0023 | |
| Design proposals for the front appearance of the Spectre model, including radiator and grille options. | 17th Sep 1934 | Box 92 \ 1 scan0024 | |
| Page 2 of a letter discussing air flow design, steering position, and chassis layout for Bentley and Spectre models. | 18th Sep 1934 | Box 92 \ 1 scan0025 | |
| Secret memo discussing the front appearance of the Spectre model, focusing on harmonizing conflicting design lines and steering rake. | 18th Sep 1934 | Box 92 \ 1 scan0026 | |
| Design modifications for the second 'Spectre' Enclosed Limousine body. | 4th Oct 1934 | Box 92 \ 1 scan0027 | |
| Production of mock-ups for the Spectre car to compare orthodox and modernised appearances. | 1st Nov 1934 | Box 92 \ 1 scan0028 | |
| Layout and mock-up of the front wing for the Spectre model. | 5th Nov 1934 | Box 92 \ 1 scan0029 | |
| Suggestions for different body styles for six 'SPECTRE' cars. | 15th Nov 1934 | Box 92 \ 1 scan0030 | |
| Correcting a previous communication to state a Limousine is on order at Park Wards, not a Saloon. | 16th Nov 1934 | Box 92 \ 1 scan0031 | |
| Request for 24 stainless steel plates to be made to sketch for the second Spectre body. | 26th Nov 1934 | Box 92 \ 1 scan0032 | |
| Alterations to the Spectre No. 2 mock-up rig and the promised body delivery date. | 1st Dec 1934 | Box 92 \ 1 scan0033 | |
| Modifications to the 'Spectre' model's front apron and wings. | 5th Dec 1934 | Box 92 \ 1 scan0034 | |
| Requesting permission to use a lorry to collect a second Spectre body from Messrs. Park Wards. | 10th Dec 1934 | Box 92 \ 1 scan0035 | |
| Pair of wing lamps received from Messrs. Hooper & Co. for chassis 30-EX, and a request for a G.R. sheet. | 10th Dec 1934 | Box 92 \ 1 scan0036 | |
| Telegram advising that hides for 31 EX are ready for collection on Thursday afternoon. | 31th Dec 1934 | Box 92 \ 1 scan0037 | |
| The delivery schedule and fitting of an Enclosed Limousine by Messrs Park Ward & Co. | 11th Dec 1934 | Box 92 \ 1 scan0038 | |
| Progress report memo regarding the body for the 'Experimental Limousine' 31.EX. | 13th Dec 1934 | Box 92 \ 1 scan0039 | |
| Request to obtain registration figures RC.2406 from Messrs. Park Ward for a scarlet runner type rear plate for chassis 30-EX. | 17th Dec 1934 | Box 92 \ 1 scan0040 | |
| Request to make a front number plate for the 30-EX Spectre car. | 17th Dec 1934 | Box 92 \ 1 scan0041 | |
| Letter to coachbuilder Park Ward & Co. Ltd. regarding the design of a Continental Touring Saloon body for experimental chassis 32-EX. | 18th Dec 1934 | Box 92 \ 1 scan0042 | |
| Letter discussing body modifications for car 31-EX, including a detachable rear squab and dashboard drawings. | 18th Dec 1934 | Box 92 \ 1 scan0043 | |
| Letter to Park Ward & Co. Ltd. clarifying a mistaken registration plate requirement for chassis 30-EX. | 19th Dec 1934 | Box 92 \ 1 scan0044 | |
| Requesting the return of a number plate sent in error to Messrs. Park Ward & Co. Ltd. | 1st Jan 1935 | Box 92 \ 1 scan0045 | |
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