| Description | Date | Identifier | |
| Telegram received by telephone detailing a filter test result for vapour lock insulation. | 27th Jun 1935 | Box 91 \ 4 scan0041 | |
| Performance issues and attempted fixes for the Spectre vehicle, including filter overheating and gearbox oil loss. | 28th Jun 1935 | Box 91 \ 4 scan0042 | |
| Multiple vehicle faults including oil leaks, chassis lubrication issues, and damaged components. | 28th Jun 1935 | Box 91 \ 4 scan0043 | |
| Confirming the dispatch of an aluminium shield for a Spectre Petrol Filter to address petrol boiling issues. | 28th Jun 1935 | Box 91 \ 4 scan0044 | |
| Overheating issues, petrol supply failures, and gearbox oil leakage during testing of the S.S.I. Spectre. | 29th Jun 1935 | Box 91 \ 4 scan0045 | |
| Vehicle faults including leaks, steering, suspension, and engine issues. | 29th Jun 1935 | Box 91 \ 4 scan0046 | |
| Confirmation of a telegram reporting on a failed insulated filter and an inefficient, boiling radiator. | 29th Jun 1935 | Box 91 \ 4 scan0047 | |
| Telegram reporting on component failures including a filter and an inefficient, boiling radiator. | 29th Jun 1935 | Box 91 \ 4 scan0048 | |
| Technical letter to G.W. Hancock regarding an overoiling issue on a Spectre II vehicle. | 29th Jun 1935 | Box 91 \ 4 scan0049 | |
| Tests to determine the effect of heat on a vehicle's petrol supply. | 30th Jun 1935 | Box 91 \ 4 scan0050 | |
| Various mechanical issues, adjustments, and repairs for the 'Spectre' vehicle. | 30th Jun 1935 | Box 91 \ 4 scan0051 | |
| The return of fractured jack brackets and a query about excessive chassis lubrication. | 1st Jul 1935 | Box 91 \ 4 scan0052 | |
| Letter to G.W. Hancock discussing solutions for radiator overheating and petrol boiling issues. | 1st Jul 1935 | Box 91 \ 4 scan0053 | |
| Necessity of oil cooling on the Spectre model, comparing oil and water temperatures. | 1st Jul 1935 | Box 91 \ 4 scan0054 | |
| Letter addressing complaints and proposed solutions for a Spectre front suspension system. | 1st Jul 1935 | Box 91 \ 4 scan0055 | |
| Clutch case and crankcase pressure tests for a 3.S.I. Spectre model regarding an over-oiling issue. | 1st Jul 1935 | Box 91 \ 4 scan0056 | |
| Test report detailing pressure readings taken from the filler tube and over the starter motor under various conditions. | 2nd Jul 1935 | Box 91 \ 4 scan0057 | |
| Clutch and crankcase pressure tests for the 'Spectre' vehicle, detailing an oil leak investigation and modifications. | 2nd Jul 1935 | Box 91 \ 4 scan0058 | |
| Issues with a condenser, water flow, thermostats, front dampers, road springs, and an oil leak. | 2nd Jul 1935 | Box 91 \ 4 scan0059 | |
| Letter regarding a gearbox issue, discussing oil type, pressure, temperature, and a potential breather modification. | 2nd Jul 1935 | Box 91 \ 4 scan0060 | |
| Requesting a shipment of 5 gallons of Wakefield's Hi-Press light Oil to G.W. Hancock in France. | 2nd Jul 1935 | Box 91 \ 4 scan0061 | |
| Letter to a customer regarding suspected collapsed front springs and incorrect yoke pieces on a vehicle. | 2nd Jul 1935 | Box 91 \ 4 scan0062 | |
| Specification sheet for vehicle buffer clearances when empty and when carrying four passengers. | 3rd Jul 1935 | Box 91 \ 4 scan0063 | |
| To G.W. Hancock discussing flywheel bearing, clutch pressure, leaks and thermostat issues. | 3rd Jul 1935 | Box 91 \ 4 scan0064 | |
| Overheating issues with the Spectre model in France, detailing problems and proposed solutions. | 1st Jul 1935 | Box 91 \ 4 scan0065 | |
| Engine overheating, petrol boiling, and potential solutions including outside air intakes and radiator improvements. | 3rd Jul 1935 | Box 91 \ 4 scan0066 | |
| Lubrication issues and solutions for improving engine cooling and air intake for the carburetter on the S.I. Spectre model. | 3rd Jul 1935 | Box 91 \ 4 scan0067 | |
| Engine cooling issues caused by insufficient airflow to the bottom half of the engine. | 3rd Jul 1935 | Box 91 \ 4 scan0068 | |
| Suspension troubles and oil leaks on the S. I. SPECTRE model. | 3rd Jul 1935 | Box 91 \ 4 scan0069 | |
| Inquiry into collapsing front springs on the S.I. Spectre, providing buffer clearance measurements. | 4th Jul 1935 | Box 91 \ 4 scan0070 | |
| Investigations into a cracked oil radiator, petrol supply issues, carburetter adjustments, and a clutch oil leak. | 4th Jul 1935 | Box 91 \ 4 scan0071 | |
| The failure and troubleshooting of the 'B' ignition system on a 'S.I. Spectre', caused by a faulty condenser. | 4th Jul 1935 | Box 91 \ 4 scan0072 | |
| Letter concerning oil leaks, gearbox modifications, and brake components for the 3. S. I. Spectre. | 4th Jul 1935 | Box 91 \ 4 scan0073 | |
| Hand-drawn sketch of a mechanical assembly with annotations for modifications and issues. | 28th Jul 1935 | Box 91 \ 4 scan0074 | |
| Telegram reporting multiple engine failures including a broken valve head, broken piston, and cracked cylinder sleeve. | 28th Jul 1935 | Box 91 \ 4 scan0075 | |
| Letter to G.W. Hancock regarding an incorrect front spring load on the 'Spectre III' car, requesting specific measurements. | 5th Jul 1935 | Box 91 \ 4 scan0076 | |
| Correspondence regarding Bentley parts, performance issues, and upcoming vehicle tests. | 5th Jul 1935 | Box 91 \ 4 scan0077 | |
| Letter discussing under-bonnet temperature and petrol boiling issues, comparing a Spectre to a Cadillac. | 6th Jul 1935 | Box 91 \ 4 scan0078 | |
| Request for a £500 Letter of Credit for expenses regarding Spectre 3 in France, and a report of issues with a previous credit note. | 6th Jul 1935 | Box 91 \ 4 scan0079 | |
| Urgent memo requesting the dispatch of two condensers by Air Mail to France. | 6th Jul 1935 | Box 91 \ 4 scan0080 | |
| Gearbox oil leak investigation and pressure tests for the 'Spectre' model. | 6th Jul 1935 | Box 91 \ 4 scan0081 | |
| Test report data for gear box pressures and various fluid temperatures at different speeds with the radiator grill on and off. | 7th Jul 1935 | Box 91 \ 4 scan0082 | |
| Confirmation of a telegram reporting a broken number five cylinder exhaust valve head. | 7th Jul 1935 | Box 91 \ 4 scan0083 | |
| List of maintenance and repair tasks to be carried out on Hancock's car. | 8th Jul 1935 | Box 91 \ 4 scan0084 | |
| Parts request for engine unit No.5 and a decision to supply a full set of valves. | 8th Jul 1935 | Box 91 \ 4 scan0085 | |
| Letter clarifying front suspension reports and postponing experiments with rubber roll rods. | 8th Jul 1935 | Box 91 \ 4 scan0086 | |
| Typed message to Hancock in France regarding omitting a felt part due to a worn bush. | 10th Jul 1935 | Box 91 \ 4 scan0087 | |
| Field report detailing an oil leak and clutch repairs on a 'Spectre' model in France. | 10th Jul 1935 | Box 91 \ 4 scan0088 | |
| Requesting that future reports be sent in triplicate. | 11th Jul 1935 | Box 91 \ 4 scan0089 | |
| Letter to a customer in France regarding gearbox oil loss and engine roughness issues. | 11th Jul 1935 | Box 91 \ 4 scan0090 | |
| Progress report on the S. I. Spectre, detailing work on the flywheel, an oil leak, and gearbox faults. | 11th Jul 1935 | Box 91 \ 4 scan0091 | |
| Gearbox issues identified during a 10,000-mile test on the Spectre model. | 11th Jul 1935 | Box 91 \ 4 scan0092 | |
| Various component failures, their suspected causes, and proposed solutions or next steps. | 12th Jul 1935 | Box 91 \ 4 scan0093 | |
| Progress report on engine and gearbox repairs for the S.S.I. Spectre. | 12th Jul 1935 | Box 91 \ 4 scan0094 | |
| Query regarding the valve spring load and pressure measurements for the S.I. Spectre. | 12th Jul 1935 | Box 91 \ 4 scan0095 | |
| Confirmation of a telegram requesting a complete Governor Spindle with Governor and end Disc. | 13th Jul 1935 | Box 91 \ 4 scan0096 | |
| From France regarding a list of technical points and updates for the S.I. Spectre vehicle. | 13th Jul 1935 | Box 91 \ 4 scan0097 | |
| Letter detailing an unsuccessful attempt to obtain a favorable currency exchange rate at a French bank. | 14th Jul 1935 | Box 91 \ 4 scan0098 | |
| Confirmation of a telegram requesting two bottom bump buffers moulded into a steel container. | 14th Jul 1935 | Box 91 \ 4 scan0099 | |
| Issues found with a 'Spectre' model's suspension and steering after dismantling. | 14th Jul 1935 | Box 91 \ 4 scan0100 | |
| Page 2 of a memo regarding snags with a chattering damper cone on a crankshaft. | 14th Jul 1935 | Box 91 \ 4 scan0101 | |
| Letter discussing ongoing vehicle testing, specifically addressing damper leaks, gearbox oil loss, and petrol system design. | 15th Jul 1935 | Box 91 \ 4 scan0102 | |
| Proposed two-tone red colour scheme for an Experimental Spectre, chassis 33-EX. | 15th Jul 1935 | Box 91 \ 4 scan0103 | |
| Cover note forwarding a communication from a fitter regarding work on Hancock's car. | 16th Jul 1935 | Box 91 \ 4 scan0104 | |
| Progress report on repairs to Spectre No.3, detailing work on the engine, gearbox, and suspension. | 12th Jul 1935 | Box 91 \ 4 scan0105 | |
| Page two of a typed letter detailing engine repairs and estimated completion time. | 16th Jul 1935 | Box 91 \ 4 scan0106 | |
| Resolving engine vibration and ongoing gearbox/synchromesh issues for the 3. S. I. SPECTRE car. | 16th Jul 1935 | Box 91 \ 4 scan0107 | |
| Technical report detailing modifications to address gearbox oil leaks and a subsequent examination of the car. | 16th Jul 1935 | Box 91 \ 4 scan0108 | |
| Letter discussing a failing front suspension hump buffer due to oil leaks and a metal pad issue. | 16th Jul 1935 | Box 91 \ 4 scan0109 | |
| Suspension component failure and design modifications. | 16th Jul 1935 | Box 91 \ 4 scan0110 | |
| The receipt of a one-gallon tin of Wakefield's HI-Press Light Oil and the uncertainty of its origin. | 16th Jul 1935 | Box 91 \ 4 scan0111 | |
| Letter correcting a previous communication about a copper pipe dimension for a gearbox oil leak. | 17th Jul 1935 | Box 91 \ 4 scan0112 | |
| Letter to G.W. Hancock regarding experiments on gearbox oil loss, pressure, and component issues. | 17th Jul 1935 | Box 91 \ 4 scan0113 | |
| Colour choice for the Experimental Spectre, 33-EX car. | 17th Jul 1935 | Box 91 \ 4 scan0114 | |
| The examination and modifications of the S.S.I. Spectre's gearbox. | 17th Jul 1935 | Box 91 \ 4 scan0115 | |
| Resolving oil leaks from ball races and dampers, and addressing petrol system issues including strong mixture and cold air intake for the carburettors. | 17th Jul 1935 | Box 91 \ 4 scan0116 | |
| Carburettor improvements and solutions for an oil leak from the rear engine bearing. | 19th Jul 1935 | Box 91 \ 4 scan0117 | |
| Gearbox issues and modifications for the Spectre model, including fixes for oil leaks and component failures. | 19th Jul 1935 | Box 91 \ 4 scan0118 | |
| Gearbox issues, focusing on ball race distortion, bearing lubrication, and synchromesh engagement. | 19th Jul 1935 | Box 91 \ 4 scan0119 | |
| Letter to G.W. Hancock outlining proposed modifications to a Spectre gearbox to resolve lubrication issues. | 19th Jul 1935 | Box 91 \ 4 scan0120 | |
| Modifications to gearbox cones and an oil thrower to manage oil flow. | 19th Jul 1935 | Box 91 \ 4 scan0121 | |
| Oil leaks from the gearbox and steering box of a Spectre vehicle, with a request for a drawing. | 21th Jul 1935 | Box 91 \ 4 scan0122 | |
| Vehicle testing and modifications for the S. I. Spectre, covering engine timing, radiator, gearbox and tyre wear. | 22th Jul 1935 | Box 91 \ 4 scan0123 | |
| Multiple technical faults and questions regarding a vehicle's gearbox, petrol pumps, cooling, and engine alignment. | 22th Jul 1935 | Box 91 \ 4 scan0124 | |
| Technical issues with tappets, oil leaks, engine failure, and clutches on Spectre models. | 22th Jul 1935 | Box 91 \ 4 scan0125 | |
| Report on the efficiency of a Spectre's radiator matrix, requesting further details. | 22th Jul 1935 | Box 91 \ 4 scan0126 | |
| From 'Sg.' to 'Rm.' concerning alarming tyre wear on a vehicle named 'Spectre'. | 24th Jul 1935 | Box 91 \ 4 scan0127 | |
| Letter seeking clarification on gearbox suitability for production, a bearing leak cure, and thermostat performance. | 24th Jul 1935 | Box 91 \ 4 scan0128 | |
| Letter discussing car performance issues related to carburettor temperature and fuel vaporization. | 24th Jul 1935 | Box 91 \ 4 scan0129 | |
| Memo discussing ongoing issues with a car's feed pipe, engine performance, ventilation, and brakes. | 24th Jul 1935 | Box 91 \ 4 scan0130 | |
| Design faults and operational issues with a gearbox synchromesh system. | 24th Jul 1935 | Box 91 \ 4 scan0131 | |
| Failures and observations related to petrol pumps, timing gear rattle, water cooling, and engine mounting. | 24th Jul 1935 | Box 91 \ 4 scan0132 | |
| Tappets, engine performance, and clutch operation, including performance figures and modifications. | 24th Jul 1935 | Box 91 \ 4 scan0133 | |
| Spectre Radiator and the development schedule for the Large Bore 20/25. | 24th Jul 1935 | Box 91 \ 4 scan0134 | |
| Telegram received by telephone requesting spares for a broken push rod. | 25th Jul 1935 | Box 91 \ 4 scan0135 | |
| Sent from France detailing issues with a Spectre vehicle, including a broken push rod, broken wheel spokes, and oil leaks. | 25th Jul 1935 | Box 91 \ 4 scan0136 | |
| Confirmation of a telegram sent from Châteauroux requesting spare parts for a broken push rod. | 25th Jul 1935 | Box 91 \ 4 scan0137 | |
| Telegram from Chateauroux requesting spares for a broken Robotham push rod. | 25th Jul 1935 | Box 91 \ 4 scan0138 | |
| Reporting on vehicle faults including push rod, wheel spoke, and engine issues for the S.S.I. Spectre. | 25th Jul 1935 | Box 91 \ 4 scan0139 | |
| Letter responding to remarks on gearbox performance and discussing engine components. | 26th Jul 1935 | Box 91 \ 4 scan0140 | |
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