| Description | Date | Identifier | |
| Investigation report into hard riding caused by failures in the chassis lubrication system and suspension components. | 26th Jul 1935 | Box 91 \ 4 scan0141 | |
| Faults with an exhaust pipe, road spring covers, and an oil leak from cylinder head joints. | 26th Jul 1935 | Box 91 \ 4 scan0142 | |
| Hand-drawn sketch detailing damage and required modifications to an O.S. Damper tube. | 26th Jul 1935 | Box 91 \ 4 scan0143 | |
| Completing a Spectre car for France and subsequent testing. | 27th Jul 1935 | Box 91 \ 4 scan0144 | |
| Memo discussing staffing, a 'Spectre' vehicle, and issues with shock absorbers and a proposed redesign of the oil filtering system. | 27th Jul 1935 | Box 91 \ 4 scan0145 | |
| The S.S.I. Spectre model, detailing issues with the gearbox, clutch, engine power, and cooling system during testing. | 27th Jul 1935 | Box 91 \ 4 scan0146 | |
| Test report on carburetters, brakes, rear engine bearing leak, and chassis lubrication. | 27th Jul 1935 | Box 91 \ 4 scan0147 | |
| Damage to a car's undercarriage caused by a grit blasting effect. | 29th Jul 1935 | Box 91 \ 4 scan0148 | |
| Instruction memo to return a damaged Dunlop wheel with damaged spokes by air mail to France. | 29th Jul 1935 | Box 91 \ 4 scan0149 | |
| Road test results for the Spectre car in Europe, particularly mountain passes, and outlining future testing plans. | 29th Jul 1935 | Box 91 \ 4 scan0150 | |
| Tyre wear on Spectre and Phantom models during tests in France. | 29th Jul 1935 | Box 91 \ 4 scan0151 | |
| Typed memo regarding the repair of a car with broken wheels and arranging its subsequent transport. | 29th Jul 1935 | Box 91 \ 4 scan0152 | |
| Summary of outstanding faults and proposed fixes for the Spectre model. | 29th Jul 1935 | Box 91 \ 4 scan0153 | |
| Various vehicle faults and proposed engineering solutions. | 29th Jul 1935 | Box 91 \ 4 scan0154 | |
| Vehicle faults, their cures, and ongoing modifications, comparing the Spectre model to the Phantom II. | 29th Jul 1935 | Box 91 \ 4 scan0155 | |
| Continued list of faults including broken push rods, various leaks, and issues with the drive, carburettor, and suspension. | 29th Jul 1935 | Box 91 \ 4 scan0156 | |
| Various technical faults with a vehicle, including the gearbox, suspension, wheels, and tyres. | 29th Jul 1935 | Box 91 \ 4 scan0157 | |
| The performance and issues of the S.I. Spectre vehicle. | 29th Jul 1935 | Box 91 \ 4 scan0158 | |
| Issues with hydraulic dampers and the oil system, with test results for thermostats and the radiator grille. | 29th Jul 1935 | Box 91 \ 4 scan0159 | |
| Carburetter performance issues due to heat absorption and various attempted solutions and alterations. | 29th Jul 1935 | Box 91 \ 4 scan0160 | |
| Water temperature test results for a Spectre with and without thermostat valves fitted at 60 and 80 MPH. | 28th Jul 1935 | Box 91 \ 4 scan0161 | |
| Water temperature test for the S.I. Spectre at 80 MPH, comparing results with thermostat valves fitted versus removed. | 29th Jul 1935 | Box 91 \ 4 scan0162 | |
| Short life of Spectre tyres and comparing wear on different models under continental conditions. | 29th Jul 1935 | Box 91 \ 4 scan0163 | |
| Radiator and crankcase pressure test results for the S.S. I. Spectre at various speeds. | 30th Jul 1935 | Box 91 \ 4 scan0164 | |
| Letter discussing abnormal tyre wear on a Spectre car, requesting a worn tyre be returned to Derby for inspection. | 30th Jul 1935 | Box 91 \ 4 scan0165 | |
| Telegram from Hancock reporting a broken exhaust pushrod and tappet wear. | 31th Jul 1935 | Box 91 \ 4 scan0166 | |
| Telegram received by telephone reporting a broken pushrod and wearing tappets. | 31th Jul 1935 | Box 91 \ 4 scan0167 | |
| Telegram confirmation reporting a broken exhaust pushrod and wearing tappets. | 31th Jul 1935 | Box 91 \ 4 scan0168 | |
| Short memo discussing the testing of Michelin and Dunlop tyres for springing and steering effects. | 31th Jul 1935 | Box 91 \ 4 scan0169 | |
| Sketch to prevent leaks on the rear bearing of the Spectre. | 31th Jul 1935 | Box 91 \ 4 scan0170 | |
| Secret memo discussing suspension issues on the 3.S.I. Spectre model following a test in France. | 3rd Sep 1935 | Box 91 \ 4 scan0171 | |
| Inquiry about the availability of a Spectre car for testing due to concerns over a stifling front compartment. | 3rd Sep 1935 | Box 91 \ 4 scan0172 | |
| The 12,000-mile road test of the Spectre model in France, assessing its performance, springing, steering, and brakes. | 31th Jul 1935 | Box 91 \ 4 scan0173 | |
| The performance and serviceability issues of a vehicle's components. | 31th Jul 1935 | Box 91 \ 4 scan0174 | |
| Dismantling instructions for pistons and clutch, and a list of failures recorded during mileage testing. | 31th Jul 1935 | Box 91 \ 4 scan0175 | |
| Faults found in a vehicle's suspension, steering, gearbox, clutch, and rear dampers. | 31th Jul 1935 | Box 91 \ 4 scan0176 | |
| List of reported faults and subsequent modifications on various vehicle components. | 31th Jul 1935 | Box 91 \ 4 scan0177 | |
| Faults and modifications on various vehicle components, including suspension, gearbox, clutch, and engine. | 31th Jul 1935 | Box 91 \ 4 scan0178 | |
| Issues with oil leaks in the rocker cover, radiator mountings, ignition distributors, and carburettor heat problems. | 31th Jul 1935 | Box 91 \ 4 scan0179 | |
| Vehicle component performance and fault report on suspension, steering, and various electrical and fuel system parts. | 31th Jul 1935 | Box 91 \ 4 scan0180 | |
| Vehicle condition and performance report detailing issues with the damper, bodywork, and performance statistics. | 31th Jul 1935 | Box 91 \ 4 scan0181 | |
| Faults and weaknesses identified in the headlamps, windscreen wiper motor, bodywork, and rear number plate unit. | 31th Jul 1935 | Box 91 \ 4 scan0182 | |
| Vehicle test report detailing issues with various components, performance data, and tyre wear. | 31th Jul 1935 | Box 91 \ 4 scan0183 | |
| Blueprint showing a top-down and cross-sectional view of a flywheel with an air pressure test pipe. | 1st Aug 1935 | Box 91 \ 4 scan0184 | |
| Telegram reporting engine failures including a seized conrod and broken/cracked pistons. | 1st Aug 1935 | Box 91 \ 4 scan0185 | |
| Confirmation of a telegram reporting on piston and connecting rod failures. | 1st Aug 1935 | Box 91 \ 4 scan0186 | |
| S.I. Spectre engine failure during a trial run, detailing the incident and post-dismantling findings. | 1st Aug 1935 | Box 91 \ 4 scan0187 | |
| S.S.I. Spectre engine failure detailing seized connecting rods and broken pistons during a trial run. | 1st Aug 1935 | Box 91 \ 4 scan0188 | |
| Typed message to G.W. Hancock requesting a phone call at a specific time. | 1st Aug 1935 | Box 91 \ 4 scan0189 | |
| Issues with tyres, clutch, and thermostat on a 3. S. I. Spectre vehicle. | 2nd Aug 1935 | Box 91 \ 4 scan0190 | |
| Chassis damage and improvement suggestions for the Spectre III model after use in France. | 5th Aug 1935 | Box 91 \ 4 scan0191 | |
| Technical report detailing various vehicle faults and recommended fixes. | 5th Aug 1935 | Box 91 \ 4 scan0192 | |
| Issues with front suspension bump buffers, spring clearance, and oil leaks from shock dampers. | 5th Aug 1935 | Box 91 \ 4 scan0193 | |
| Faults and proposed solutions for suspension and axle issues. | 5th Aug 1935 | Box 91 \ 4 scan0194 | |
| Telegram with instructions to collect a person named Elliot upon his arrival from France. | 5th Aug 1935 | Box 91 \ 4 scan0195 | |
| Arranging to meet a car with Rose in Boulogne, France. | 6th Aug 1935 | Box 91 \ 4 scan0196 | |
| Instruction to Roberts at the Hotel De France to wait for a complete set of pistons to arrive. | 6th Aug 1935 | Box 91 \ 4 scan0197 | |
| Short typed memo to A. Behnan with instructions on completing reports. | 6th Aug 1935 | Box 91 \ 4 scan0198 | |
| Telegram enquiring if two newly arrived pistons, part number E 86672, should be fitted. | 6th Aug 1920 | Box 91 \ 4 scan0199 | |
| Oil leak from the Spectre rear axle pinion bearing and a recommended modification. | 7th Aug 1935 | Box 91 \ 4 scan0200 | |
| Work programmes, staff holidays, and parts delivery for car testing in France. | 7th Aug 1935 | Box 91 \ 4 scan0201 | |
| Letter from France regarding exchange allowance, receipt of parts, and forwarding copies of a 10,000 miles report. | 9th Aug 1935 | Box 91 \ 4 scan0202 | |
| Requesting the return of a 10,000 Miles Report on Spectre 3 for approval and signing. | 11th Aug 1935 | Box 91 \ 4 scan0203 | |
| Already circulated report, suggesting a supplementary memo for any amendments. | 13th Aug 1935 | Box 91 \ 4 scan0204 | |
| Letter to G.W. Hancock regarding Dunlop wheel spoke failures on a Spectre and gear lever issues on another vehicle. | 14th Aug 1935 | Box 91 \ 4 scan0205 | |
| Delay in returning two failed Dunlop road wheels from Spectre 3 until replacements arrive. | 16th Aug 1935 | Box 91 \ 4 scan0206 | |
| Various mechanical and bodywork issues found on the Spectre and 21.G.IV cars. | 16th Aug 1935 | Box 91 \ 4 scan0207 | |
| The unsuccessful testing of carburettors with an asbestos washer to isolate heat effects. | 17th Aug 1935 | Box 91 \ 4 scan0208 | |
| Engine oil supply and servo linkage faults found in the Spectre Car. | 19th Aug 1935 | Box 91 \ 4 scan0209 | |
| Drawing illustrating fouling issues with a servo mechanism when the brakes are worn. | 19th Aug 1935 | Box 91 \ 4 scan0210 | |
| Confirmation of a telegram regarding personnel travelling to Switzerland. | 20th Aug 1935 | Box 91 \ 4 scan0211 | |
| Letter to G.W. Hancock regarding recommended changes to the Spectre chassis lubrication meter valves. | 20th Aug 1935 | Box 91 \ 4 scan0212 | |
| The failure of a Spectre engine, detailing an oil leak, a broken exhaust valve, and bearing wear. | 21th Aug 1935 | Box 91 \ 4 scan0213 | |
| Short telegram regarding personnel movements and the return of damaged valves. | 21th Aug 1935 | Box 91 \ 4 scan0214 | |
| Low oil pressure issues and potential solutions for hydraulic tappets. | 21th Aug 1935 | Box 91 \ 4 scan0215 | |
| Telegram received by telephone detailing a broken and damaged exhaust valve seat. | 21th Aug 1935 | Box 91 \ 4 scan0216 | |
| Broken exhaust valve and an oil pressure drop due to a crankshaft issue on a S. I. Spectre engine. | 22th Aug 1935 | Box 91 \ 4 scan0217 | |
| Investigating two complaints regarding the Servo on 3S1, addressing issues with the swinging arm and a design fault. | 22th Aug 1935 | Box 91 \ 4 scan0218 | |
| Letter to Dunlop Rim & Wheel Co. Ltd. regarding a customs issue with wheels stuck in Paris requiring a 'Licence d'importation'. | 22th Aug 1935 | Box 91 \ 4 scan0219 | |
| Clarifying oil pressure readings for the S. I. Spectre model and the discovery of a failed journal bearing. | 23th Aug 1935 | Box 91 \ 4 scan0220 | |
| Engine repairs on the 'Spectre' vehicle in France, including personnel travel arrangements. | 24th Aug 1935 | Box 91 \ 4 scan0221 | |
| Confirmation of a telegram sent to arrange for the delivery of a Spectre oil cool radiator. | 25th Aug 1935 | Box 91 \ 4 scan0222 | |
| Request to send a replacement Spectre oil cooler to Hancock in France. | 26th Aug 1935 | Box 91 \ 4 scan0223 | |
| Engine problems with the S. I. Spectre vehicle, including low oil pressure and clatter. | 26th Aug 1935 | Box 91 \ 4 scan0224 | |
| Report from France on worn connecting rod bearings causing a rattle, ignition trouble, and plans to investigate the damper flywheel. | 1st Sep 1935 | Box 91 \ 4 scan0225 | |
| Note about suspected difficulty in re-starting the Spectre model at high temperatures. | 2nd Sep 1935 | Box 91 \ 4 scan0226 | |
| Test report on the Spectre and Bentley models' performance on the Stelvio pass, focusing on fuel system issues and engine re-starting problems after a climb. | 2nd Sep 1935 | Box 91 \ 4 scan0227 | |
| Vehicle modifications for vapour lock and test results for steering and handling on the Stelvio Pass. | 2nd Sep 1935 | Box 91 \ 4 scan0228 | |
| Car's performance during a European tour, focusing on handling on the Stelvio pass, vapour lock, and varying fuel quality. | 2nd Sep 1935 | Box 91 \ 4 scan0229 | |
| Letter discussing engine restart problems after testing on the Stelvio Pass, theorizing it is due to petrol evaporation. | 2nd Sep 1935 | Box 91 \ 4 scan0230 | |
| Under-bonnet temperature issues and potential solutions for carburettors on the first Spectre models. | 1st Sep 1935 | Box 91 \ 4 scan0231 | |
| Request to order 12 ZS5 Meter Valves from the Luvax Co. for tests on the Spectre in France. | 2nd Sep 1935 | Box 91 \ 4 scan0232 | |
| Communication concerning Spectre chassis lubrication, confirming an order for ZS5 meter valves. | 2nd Sep 1935 | Box 91 \ 4 scan0233 | |
| Six causes for ignition troubles found on a Spectre engine. | 3rd Sep 1935 | Box 91 \ 4 scan0234 | |
| Engine, ignition and steering issues with the 'Spectre' model following a test run on the Stelvio pass. | 3rd Sep 1935 | Box 91 \ 4 scan0235 | |
| Vehicle performance concerning turning circles, carburation, and engine cooling, with a note on a new servo arm fitment. | 3rd Sep 1935 | Box 91 \ 4 scan0236 | |
| Graph showing various engine temperature readings during a climb up the Stelvio Pass, Italy. | 4th Sep 1935 | Box 91 \ 4 scan0237 | |
| Engine starting issues and potential solutions for the 3. S. I. Spectre model. | 4th Sep 1935 | Box 91 \ 4 scan0238 | |
| Modifications to the 'S. I. SPECTRE' car regarding oil pressure and carburettor mixture. | 5th Sep 1935 | Box 91 \ 4 scan0239 | |
| Performance of the Spectre & Bentley on the Stelvio pass and issues with petrol quality on the continent. | 5th Sep 1935 | Box 91 \ 4 scan0240 | |
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