| Description | Date | Identifier | |
| Tests for the Spectre engine to resolve oil pressure loss caused by oil swishing. | 4th Feb 1935 | Box 4 \ 1 01-page248 | |
| Blueprint of a baffled tank with a perforated plate and flaps. | 7th Feb 1935 | Box 4 \ 1 01-page249 | |
| Progress report on road tests for the Spectre model after modifications. | 7th Feb 1935 | Box 4 \ 1 01-page250 | |
| Progress report on engine idling, brake adjustments, and ongoing suspension problems. | 7th Feb 1935 | Box 4 \ 1 01-page251 | |
| Confirming the success of a scheme to cure the loss of oil pressure during road tests for the Spectre model. | 7th Feb 1935 | Box 4 \ 1 01-page252 | |
| Request to fit all Spectre lower halves of engines with a proven anti-splash device. | 7th Feb 1935 | Box 4 \ 1 01-page253 | |
| Log detailing time spent and modifications carried out in the fitting shop. | 1st Feb 1935 | Box 4 \ 1 01-page254 | |
| Log of vehicle maintenance including spring changes, shock damper alterations, and engine removal. | 31th Jan 1934 | Box 4 \ 1 01-page255 | |
| Table summarizing work allocation in days for various departments from September 1934 to January 1935. | 1st Jan 1935 | Box 4 \ 1 01-page256 | |
| Long-term durability and testing of rubber joints in aluminium cylinders for the Spectre engine. | 11th Feb 1935 | Box 4 \ 1 01-page257 | |
| Secret memorandum discussing the car programme, specifically introducing the Spectre engine into the Phantom chassis. | 12th Feb 1935 | Box 4 \ 1 01-page258 | |
| Road test report for the 'SPECTRE' model, detailing performance, handling, and vibration issues. | 12th Feb 1935 | Box 4 \ 1 01-page259 | |
| Issues with a vehicle's transmission, gearbox, brakes, and engine. | 2nd Feb 1935 | Box 4 \ 1 01-page260 | |
| Request to investigate fitting a revolution counter to the Spectre engines. | 15th Feb 1935 | Box 4 \ 1 01-page261 | |
| Two modifications to be carried out on the clutch for the Spectre model. | 15th Feb 1935 | Box 4 \ 1 01-page262 | |
| List of work instructions for chassis 30-EX. | 15th Feb 1935 | Box 4 \ 1 01-page263 | |
| Test drive report on the 'Spectre Car', detailing issues with the gearbox, springing, and clutch vibration. | 15th Feb 1935 | Box 4 \ 1 01-page264 | |
| Ride quality and braking performance of the Spectre, comparing it to a Cadillac. | 15th Feb 1935 | Box 4 \ 1 01-page265 | |
| Confidential test report on the 'Spectre' vehicle, detailing favorable features and serious faults. | 18th Feb 1935 | Box 4 \ 1 01-page266 | |
| Report discussing issues with the clutch, braking, and the safety of rear passengers under certain road conditions. | 18th Feb 1935 | Box 4 \ 1 01-page267 | |
| List of minor faults and observations for the 'SPECTRE' project vehicle. | 18th Feb 1935 | Box 4 \ 1 01-page268 | |
| Modifications to the Spectre engine oil sump to correct original faults. | 18th Feb 1935 | Box 4 \ 1 01-page269 | |
| Request to fit a standard windscreen wiper motor bracket (RR. Sch.700) to the second Spectre chassis 31-EX. | 22th Feb 1935 | Box 4 \ 1 01-page270 | |
| Concerns about the ground clearance of the Spectre tray and potential improvements. | 28th Feb 1935 | Box 4 \ 1 01-page271 | |
| Modifications to the horizontal hand brake and gear lever for the Spectre model. | 28th Feb 1935 | Box 4 \ 1 01-page272 | |
| Secret memo regarding the design and testing of a new Spectre Oil System temperature regulator. | 2nd Feb 1935 | Box 4 \ 1 01-page273 | |
| Improved oiling system for the Spectre model, detailing re-designed components and alterations. | 4th Mar 1935 | Box 4 \ 1 01-page274 | |
| Secret memo discussing apprehension about the 12 to 1 eccentric ratio on the Spectre silent tappets and experiments on breathers. | 6th Mar 1935 | Box 4 \ 1 01-page275 | |
| Specification document for the Spectre No. 5 Unit. | 8th Mar 1935 | Box 4 \ 1 01-page276 | |
| List of required maintenance and repair work for the Spectre II car. | 11th Mar 1935 | Box 4 \ 1 01-page277 | |
| Progress report discussing design and experimental points for the Spectre model, focusing on the suspension. | 11th Mar 1935 | Box 4 \ 1 01-page278 | |
| Engine unit design improvements, including carburetter accessibility, valve springs, and a new carburetter system. | 11th Mar 1938 | Box 4 \ 1 01-page279 | |
| Development issues with engine tappets, gearbox, brakes, and steering for various car models. | 11th Mar 1936 | Box 4 \ 1 01-page280 | |
| Technical report on car development issues including clutch, frame movement, exhaust, cooling, and vehicle weight. | 11th Mar 1935 | Box 4 \ 1 01-page281 | |
| From 'Sg' to 'Hs/Rm' complaining about not receiving a copy of the 'Progress of the Spectre' report. | 15th Mar 1935 | Box 4 \ 1 01-page282 | |
| Modifications to the Spectre Dynamo Drive's spindle for gravity-fed lubrication. | 19th Mar 1935 | Box 4 \ 1 01-page283 | |
| Seizure of the Spectre dynamo drive bush and proposed experimental solutions. | 20th Mar 1935 | Box 4 \ 1 01-page284 | |
| Comparing actual and estimated oil pressures for the Spectre engine system. | 20th Mar 1935 | Box 4 \ 1 01-page285 | |
| Graph of Spectre oil pressures from the pump to release, comparing actual and estimated values. | 19th Mar 1955 | Box 4 \ 1 01-page286 | |
| Request to fit an original heavy crankshaft to Spectre No. 5 unit to test for engine vibration. | 21th Mar 1935 | Box 4 \ 1 01-page287 | |
| Listing required repairs for Spectre No. 1, including a slipping clutch, rear springs, and rear shackles. | 22th Mar 1935 | Box 4 \ 1 01-page288 | |
| Various mechanical faults concerning Spectre models, including tappets, dampers, and chassis. | 26th Mar 1935 | Box 4 \ 1 01-page289 | |
| Letter to T.B. Andre & Co. enquiring about the suitability of their Silent Bloc Bearings for a specific application. | 1st Apr 1935 | Box 4 \ 1 01-page290 | |
| Fitting of Silent Bloc bearings to the Spectre II rear stabiliser, referencing two design schemes. | 2nd Apr 1938 | Box 4 \ 1 01-page291 | |
| Letter from Andre (Silentbloc) Limited discussing the torque and deflection specifications for a Silentbloc part. | 2nd Apr 1935 | Box 4 \ 1 01-page292 | |
| Required tests and modifications for the Spectre project's suspension and gearbox. | 2nd Apr 1935 | Box 4 \ 1 01-page293 | |
| Required modifications and observations for engine components, steering, and sump. | 2nd Apr 1935 | Box 4 \ 1 01-page294 | |
| Letter to T.B. Andre & Co. confirming an order for four bearings (two of E.1241 and two of E.2094). | 3rd Apr 1936 | Box 4 \ 1 01-page295 | |
| Order for Silent Bloc Bearings from Messrs. Andre Ltd. | 3rd Apr 1935 | Box 4 \ 1 01-page296 | |
| Work order detailing modifications for the car 'Spectre No. 1'. | 3rd Apr 1935 | Box 4 \ 1 01-page297 | |
| Letter from Andre (Silentbloc) Ltd. regarding Silentbloc E.1241 and the high number of oscillations. | 4th Apr 1935 | Box 4 \ 1 01-page298 | |
| List of modifications to be carried out on the Spectre No. 2 car. | 5th Feb 1935 | Box 4 \ 1 01-page299 | |
| List of work instructions for modifications and repairs on the vehicle Spectre 2. | 8th Apr 1935 | Box 4 \ 1 01-page300 | |
| Instruction to all testers regarding the security of Spectre cars. | 8th Apr 1935 | Box 4 \ 1 01-page301 | |
| Points arising from the general assembly of the Spectre Chassis, detailing issues with the carburetter, reflux pipes, and mixture control. | 28th Jun 1936 | Box 4 \ 1 01-page302 | |
| Assembly notes and modifications for water connections, spring drive, and radiator fittings. | 1st Apr 1936 | Box 4 \ 1 01-page303 | |
| Technical note detailing six issues and observations related to fitting a clutch, part G. 82537. | 2nd Apr 1935 | Box 4 \ 1 01-page304 | |
| List of observations and recommendations concerning the flywheel and clutch assembly. | 2nd Apr 1935 | Box 4 \ 1 01-page305 | |
| Assembly and design issues with the engine, gearbox, brake mechanism, and frame fittings. | 8th Apr 1930 | Box 4 \ 1 01-page306 | |
| Instructions and notes regarding frame and fittings for job F. 86707, including engine suspension and body stay modifications. | 2nd Apr 1935 | Box 4 \ 1 01-page307 | |
| List of technical notes and modifications for various vehicle components. | 8th Jun 1938 | Box 4 \ 1 01-page308 | |
| Modifications and findings for Governor Control, Rear Springs, and Springing Main Control. | 8th Apr 1940 | Box 4 \ 1 01-page309 | |
| List of issues and required modifications for front axle, rear axle, and brake actuating components. | 2nd Apr 1938 | Box 4 \ 1 01-page310 | |
| Notes on issues and proposed amendments for various vehicle components and their respective List of Parts (LOP). | 8th Jun 1935 | Box 4 \ 1 01-page311 | |
| List of engineering suggestions for modifications to Rear Hubs, Rear Brake Intermediate Shaft, and Rear Stabiliser. | 8th Apr 1935 | Box 4 \ 1 01-page312 | |
| Jobs for dynamometer testing of Spectre and Vulture components. | 9th Apr 1935 | Box 4 \ 1 01-page313 | |
| Confirming a conversation about work on Spectre 2 and a supercharged Bentley for a visit. | 10th Apr 1935 | Box 4 \ 1 01-page314 | |
| Request to fit front suspension yokes to Spectre No. 1 to correct low ground clearance. | 10th Apr 1935 | Box 4 \ 1 01-page315 | |
| Progress report on the Spectre model, detailing design considerations for the exhaust system and suspension. | 11th Apr 1935 | Box 4 \ 1 01-page316 | |
| Progress report on the Spectre model, detailing work on the gearbox, steering, engine mounting, and slow running carburation. | 11th Apr 1936 | Box 4 \ 1 01-page317 | |
| Progress report on the testing and development of various engine and chassis components, including camshafts, pistons, and brakes. | 11th Jun 1935 | Box 4 \ 1 01-page318 | |
| Summarizing experimental findings on rear axle dither, hydraulic tappets, engine durability, and frame stiffness. | 11th Apr 1938 | Box 4 \ 1 01-page319 | |
| Internal progress report on the Spectre, Phantom noise insulation, Bentley 10,000-mile test, and supercharger development. | 11th Apr 1935 | Box 4 \ 1 01-page320 | |
| Progress report on the testing and development of axle control, water excluders, braking systems, and a change speed lever. | 11th Apr 1935 | Box 4 \ 1 01-page321 | |
| Performance, steering, and gear ratio modifications for various car models. | 11th Apr 1935 | Box 4 \ 1 01-page322 | |
| Progress report on the 'Spectre' project, detailing developments in the exhaust and suspension systems. | 15th Apr 1935 | Box 4 \ 1 01-page323 | |
| Development points for the gearbox, steering, engine mounting, carburation, and tappet wear. | 15th Apr 1935 | Box 4 \ 1 01-page324 | |
| Design and testing considerations for various engine and chassis components. | 15th Apr 1935 | Box 4 \ 1 01-page325 | |
| Technical memo (sheet 4) discussing modifications to the Spectre model's power unit, frame, dashboard, and water circulation system. | 15th Apr 1935 | Box 4 \ 1 01-page326 | |
| Design proposals for the Spectre model's radiator grille and frontal appearance. | 17th Apr 1935 | Box 4 \ 1 01-page327 | |
| Design review discussing improvements to fog lamp mounting, overall car appearance, and control box aesthetics. | 17th Apr 1935 | Box 4 \ 1 01-page328 | |
| Manufacturing cost reductions for the 'Spectre' project, focusing on modifying needle bearing housings. | 17th Apr 1935 | Box 4 \ 1 01-page329 | |
| Comparing road test impressions of two vehicles, Spectre I and Spectre II. | 17th Apr 1935 | Box 4 \ 1 01-page330 | |
| The failure of Laconite high tension wires on test bed units due to heat. | 18th Apr 1935 | Box 4 \ 1 01-page331 | |
| Modifications to the 'Spectre Controls' layout. | 25th Apr 1935 | Box 4 \ 1 01-page332 | |
| Tests of Spectre engine water flows with modified crankcase passages and different water pumps. | 25th Apr 1935 | Box 4 \ 1 01-page333 | |
| Performance comparison between a large and small pump under various conditions. | 25th Apr 1935 | Box 4 \ 1 01-page334 | |
| Summary of test results on water pumps and cooling systems, addressing cavitation and back pressure. | 25th Apr 1935 | Box 4 \ 1 01-page335 | |
| Graph showing Spectre engine water flows and temperature rise against RPM for different pump configurations. | 13th Apr 1936 | Box 4 \ 1 01-page336 | |
| Graph showing the effect of varying inlet temperature on water flow at 4000 RPM under four different circuit configurations. | 26th Apr 1935 | Box 4 \ 1 01-page337 | |
| To 'HEC' outlining a list of seven engineering and production jobs related to various vehicle components. | 26th Apr 1935 | Box 4 \ 1 01-page338 | |
| Mock-ups for the Spectre's frontal appearance and column controls. | 26th Apr 1935 | Box 4 \ 1 01-page339 | |
| Internal memorandum detailing suggestions for dealing with points raised about the Spectre Flywheel and Clutch. | 26th Apr 1935 | Box 4 \ 1 01-page340 | |
| Technical notes on modifications to studs, clutch, engine couplings, and frames. | 26th Apr 1936 | Box 4 \ 1 01-page341 | |
| Confirming the agreed arrangement to fit a mock-up of a modified frontal appearance on Spectre No.III. | 29th Apr 1935 | Box 4 \ 1 01-page342 | |
| List of maintenance and repair tasks for the car 'Spectre 1'. | 30th Apr 1935 | Box 4 \ 1 01-page343 | |
| Payment authorisation for two invoices from the British Tyre & Rubber Co. Ltd. | 29th Apr 1935 | Box 4 \ 1 01-page344 | |
| Official order for vulcanised rubber blocks and brackets. | 29th Apr 1935 | Box 4 \ 1 01-page345 | |
| Secret memo discussing travel arrangements for a trial of the 'Spectre' project in Derby. | 1st May 1935 | Box 4 \ 1 01-page346 | |
| Table detailing the specifications of various car engines. | 8th May 1935 | Box 4 \ 1 01-page347 | |
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