| Description | Date | Identifier | |
| Invitation to a lecture and tea with Mr. Humfrey Symons regarding his Sahara journey in a Phantom III. | 13th Jan 1938 | Box 182 \ M17 img001 | |
| Concerns about selling chassis 34-EX due to it being an early, non-standard model with obsolete parts. | 17th Feb 1938 | Box 182 \ M17 img002 | |
| Photograph of a vintage car on a winding country road. | 17th Feb 1938 | Box 182 \ M17 img003 | |
| Photograph of a connecting rod and its associated bolt. | 17th Feb 1938 | Box 182 \ M17 img005 | |
| Photograph showing the underside of a gearbox with external control linkages. | 17th Feb 1938 | Box 182 \ M17 img006 | |
| Underside view of a vehicle chassis, showing the gearbox, frame, and front suspension. | 17th Feb 1938 | Box 182 \ M17 img008 | |
| Photograph showing the engine and front axle assembly of a vehicle from underneath. | 17th Feb 1938 | Box 182 \ M17 img010 | |
| Design and testing of exhaust silencers to reduce back pressure and heat. | 9th Jul 1932 | Box 182 \ M18 img001 | |
| Technical memo discussing the design and testing of exhaust silencers to reduce fishtail noise. | 9th Jul 1932 | Box 182 \ M18 img002 | |
| Test report from Brooklands detailing car performance and a list of modifications compared to the standard model. | 12th Nov 1928 | Box 182 \ M18 img003 | |
| List of technical specifications and updates for various car components including brakes, suspension, engine, and instrument panel. | 22th Apr 1932 | Box 182 \ M18 img004 | |
| Testing and standardizing permanent jacks for a car model, likely the Phantom II. | 24th Apr 1934 | Box 182 \ M18 img005 | |
| Letter discussing a car's overheating problem, suggesting removal of a filter and investigating potential radiator blockage. | 30th Apr 1930 | Box 182 \ M18 img006 | |
| Test drive report discussing the car's handling, shock absorbers, braking, and performance compared to competitors. | 1st Feb 1935 | Box 182 \ M18 img007 | |
| The process and difficulties of clearing and flushing a radiator and cylinders. | 27th Apr 1920 | Box 182 \ M18 img008 | |
| Special gauze filter fitted to a radiator during a 10,000-mile test. | 26th Apr 1930 | Box 182 \ M18 img009 | |
| Confidential test report on the handling and performance of Chassis 19 EX with various shock absorber configurations. | 1st Feb 1933 | Box 182 \ M18 img010 | |
| Axle oil leak, testing a vented plug on car 24-EX as a potential cure, and the centre point lubrication system. | 30th Apr 1930 | Box 182 \ M18 img011 | |
| Comparing the springing and steadiness of two experimental cars, 23-EX and 24-EX. | 16th May 1930 | Box 182 \ M18 img012 | |
| The loss of 'silkiness' in springs due to rust and lubrication issues, contrasting with the real difference being the type of springing. | 17th Aug 1930 | Box 182 \ M18 img013 | |
| Vehicle testing, detailing issues with overheating and brake squeaks. | 17th Aug 1930 | Box 182 \ M18 img014 | |
| Private memorandum regarding an investigation into brake squeaks and a proposed solution. | 14th Nov 1930 | Box 182 \ M18 img015 | |
| 1400-mile road test of the 95-MY car, detailing performance, road conditions, and passenger comfort. | 14th Nov 1930 | Box 182 \ M18 img016 | |
| Report comparing vehicle ride quality, performance, and pricing against American competitors. | 14th Nov 1930 | Box 182 \ M18 img017 | |
| Car performance issues related to temperature, acceleration, and springing. | 20th Nov 1930 | Box 182 \ M18 img018 | |
| Specification table detailing weights and measurements for various car models. | 20th Nov 1930 | Box 182 \ M18 img019 | |
| Note discussing responsibility for customer satisfaction and modifications for imported 25-EX and Phantom II chassis in the U.S.A. | 22th Nov 1930 | Box 182 \ M18 img020 | |
| Contract with R. R. Inc, production for the U.S. market, and technical comparisons of the 25 HP model. | 25th Nov 1924 | Box 182 \ M18 img021 | |
| Purchase of distinctive English lamps for the Springfield plant, comparing prices and alternatives. | 25th Nov 1924 | Box 182 \ M18 img022 | |
| Use of 'Staybrite' (stainless iron) versus chromium plating for headlamps. | 26th Nov 1930 | Box 182 \ M18 img023 | |
| Visit to the General Motors Proving Ground, detailing its facilities, road types, and vehicle testing. | 26th Nov 1930 | Box 182 \ M18 img024 | |
| Visit to a General Motors testing ground, comparing their methods with existing practices. | 26th Nov 1930 | Box 182 \ M18 img025 | |
| Brief typed note discussing the cost per car for General Motors' annual production. | 3rd Sep 1935 | Box 182 \ M18 img026 | |
| Spectre test in France, highlighting suspension problems, servicing issues, and future modifications. | 3rd Sep 1935 | Box 182 \ M18 img027 | |
| Stifling front compartment, referencing earlier Phantoms and inquiring about a delayed Spectre car. | 29th Aug 1935 | Box 182 \ M18 img028 | |
| 12,000-mile test report on the 'SPECTRE' model in France, evaluating its performance and comparing it to the Phantom and Cadillac. | 31th Jul 1935 | Box 182 \ M18 img029 | |
| Performance and servicing issues with hydraulic dampers, rear axle, and engine components. | 31th Jul 1935 | Box 182 \ M18 img030 | |
| Dismantling instructions for the clutch and a list of failures recorded during mileage testing. | 31th Jul 1935 | Box 182 \ M18 img031 | |
| List of vehicle faults identified across suspension, steering, gearbox, clutch, and dampers. | 31th Jul 1935 | Box 182 \ M18 img032 | |
| List of reported vehicle faults and the subsequent modifications or actions attended to. | 31th Jul 1935 | Box 182 \ M18 img033 | |
| Faults and cures for various vehicle components including the suspension, gearbox, clutch, and engine. | 31th Jul 1935 | Box 182 \ M18 img034 | |
| Engine and chassis component issues including oil leaks, ignition timing, and carburation problems. | 31th Jul 1935 | Box 182 \ M18 img035 | |
| Component-by-component fault and performance report from a vehicle test. | 31th Jul 1935 | Box 182 \ M18 img036 | |
| Vehicle condition report detailing the servo, damper control unit, bodywork, performance metrics, and tyre mileage. | 31th Jul 1935 | Box 182 \ M18 img037 | |
| Faults found on headlamps, windscreen wipers, bodywork, and the rear number plate unit. | 31th Jul 1935 | Box 182 \ M18 img038 | |
| Vehicle test report detailing faults with the luggage grid, lamps, and gauges, along with performance and maintenance notes. | 16th Apr 1934 | Box 182 \ M18 img039 | |
| Summary of findings and proposed modifications for silent tappet and oiling system issues. | 16th Apr 1934 | Box 182 \ M18 img040 | |
| Tests on rocker shaft pressure, anti-surge valve caps, universal joints, and petrol pump performance. | 16th Apr 1934 | Box 182 \ M18 img041 | |
| Letter discussing the design and testing of 23-EX shock damper elbows, including material choice, leak prevention, and damping levels. | 10th Apr 1934 | Box 182 \ M18 img042 | |
| List of faults and repairs being carried out on a car. | 8th Apr 1934 | Box 182 \ M18 img043 | |
| Car 26-EX at 10,000 miles, detailing engine performance and acceleration data. | 23th Apr 1934 | Box 182 \ M18 img044 | |
| Inspection report on the condition of engine components including connecting rods, pistons, cylinders, and valves. | 23th Apr 1934 | Box 182 \ M18 img045 | |
| The performance and condition of the clutch, servo motor, gearbox, and carburetter components. | 23th Apr 1934 | Box 182 \ M18 img046 | |
| The performance and issues of various vehicle components including dampers, radiator, and engine parts. | 23th Apr 1934 | Box 182 \ M18 img047 | |
| The condition of wheelcase fittings, ignition plugs, petrol tank, engine coupling, and universal joints. | 23th Apr 1934 | Box 182 \ M18 img048 | |
| The performance of automatically controlled hydraulic dampers, steering column modifications, and rear axle noise and lubrication issues. | 23th Apr 1934 | Box 182 \ M18 img049 | |
| Performance tests on steering tubes, buffer clearances, and brakes over a 10,000-mile period. | 23th Apr 1934 | Box 182 \ M18 img050 | |
| Condition report on the vehicle's electrical system components following a mileage test. | 5th Jul 1932 | Box 182 \ M18 img051 | |
| Letter discussing maximum speed test results from Brooklands, carburettor comparisons, and the performance of the Peregrine car. | 5th Jul 1932 | Box 182 \ M18 img052 | |
| The features and failures of engine unit PH II 22 after 5000 miles of testing. | 14th Jul 1932 | Box 182 \ M18 img053 | |
| Piston, ignition, and carburetor issues found during vehicle testing. | 14th Jul 1932 | Box 182 \ M18 img054 | |
| Valve and petrol pump issues, including tappet wear, camshaft squeaks, and petrol boiling problems. | 14th Jul 1932 | Box 182 \ M18 img055 | |
| Faults and modifications on a vehicle's petrol filter, oil pump, clutch, and exhaust systems. | 14th Jul 1932 | Box 182 \ M18 img056 | |
| Exhaust system modifications and synchromesh gearbox performance. | 14th Jul 1932 | Box 182 \ M18 img057 | |
| Synchromesh mechanism failure, gear lever modification, and notes on rear hubs and brakes. | 12th Apr 1941 | Box 182 \ M18 img058 | |
| Condition and performance of brake drums, axles, and suspension components after mileage testing. | 12th Apr 1941 | Box 182 \ M18 img059 | |
| Test report on steering, springing, shock dampers, propeller shaft, and wheel carrier modifications. | 12th Apr 1941 | Box 182 \ M18 img060 | |
| The performance and modifications of a spare wheel carrier, radiator shutters, and bonnet components. | 12th Apr 1941 | Box 182 \ M18 img061 | |
| Issues and modifications for petrol gauges, water pumps, dynamo drives, and starter motors. | 12th Apr 1941 | Box 182 \ M18 img062 | |
| Test report detailing the performance, modifications, and failures of various electrical components including a starter motor, switch, dynamo, and battery box. | 12th Apr 1941 | Box 182 \ M18 img063 | |
| Test report detailing the condition and failures of various vehicle components after mileage accumulation. | 12th Apr 1941 | Box 182 \ M18 img064 | |
| The Lucas horn, chassis lubrication, engine oil performance, fuel consumption, and tyre mileage. | 25th Jul 1932 | Box 182 \ M18 img065 | |
| Letter discussing vehicle performance results, comparing them to factory tests and arranging future vehicle testing. | 25th Jul 1932 | Box 182 \ M18 img066 | |
| Test report on vehicle 19-EX after completing 10,000 miles. | 15th Aug 1932 | Box 182 \ M18 img067 | |
| Various noises and issues on production chassis, including the gear lever, engine gears, oil pump, camshaft, and valve mechanism. | 15th Aug 1932 | Box 182 \ M18 img068 | |
| Piston failure, identifying the cause as crankshaft vibration leading to rubbing on the piston stops. | 14th Oct 1932 | Box 182 \ M18 img069 | |
| Sticking exhaust valves on car 19-EX and the oil level for a Peregrine gearbox. | 6th Feb 1933 | Box 182 \ M18 img070 | |
| Performance, dimensions, and issues of 19-EX Governor Shock Dampers. | 14th Feb 1933 | Box 182 \ M18 img071 | |
| Letter discussing conflicting reports on the performance of governor shock dampers and requesting further comparison testing. | 14th Feb 1933 | Box 182 \ M18 img072 | |
| On the status of experimental cars, including a 'written off' vehicle, and the urgent need for a replacement. | 24th Feb 1933 | Box 182 \ M18 img073 | |
| Tests conducted on a standard Phantom engine to investigate the gumming up of piston rings. | 18th Nov 1926 | Box 182 \ M18 img074 | |
| Tests on piston ring groove clearance and stiffness to prevent 'gumming up'. | 20th Oct 1926 | Box 182 \ M18 img075 | |
| Piston gumming experiments, testing the influence of stiff and weak piston rings on a Phantom engine. | 20th Oct 1926 | Box 182 \ M18 img076 | |
| Continued report on the gumming tendency of rings with varying groove clearances and stiffness. | 1st Mar 1927 | Box 182 \ M18 img077 | |
| Design of scraper rings, comparing 'L' shaped rings with other designs for car or aero engines. | 1st Mar 1927 | Box 182 \ M18 img078 | |
| Design and use of tapered, faked, and lapped piston rings in car and aero engines, particularly regarding oil consumption. | 12th May 1927 | Box 182 \ M18 img079 | |
| Oil consumption experiment on a Phantom engine, comparing standard and upward-sloping oil drain holes. | 9th May 1927 | Box 182 \ M18 img080 | |
| Investigation into the factors causing over-oiling in Phantom engines compared to the Silver Ghost. | 26th Dec 1922 | Box 182 \ M18 img081 | |
| Report page analyzing the effect of oil flow on fuel consumption for Phantom and Silver Ghost models. | 26th Dec 1922 | Box 182 \ M18 img082 | |
| Technical comparison of oil pressure, bearing clearance, and oil flow between the Phantom and Silver Ghost models. | 26th Dec 1922 | Box 182 \ M18 img083 | |
| Analysis of methods for reducing excessive engine oil flow, comparing Silver Ghost and Phantom models. | 26th Dec 1922 | Box 182 \ M18 img084 | |
| Report page detailing engine testing results, specifically regarding oil flow, lubrication, and the performance of piston rings. | 26th Dec 1922 | Box 182 \ M18 img085 | |
| Report page detailing findings on oil consumption issues, smoking exhaust, and proposing solutions related to valve guides, piston rings, and bearing clearances. | 26th Dec 1922 | Box 182 \ M18 img086 | |
| High oil consumption in a Phantom engine, comparing it to the Silver Ghost and referencing an upcoming test. | 26th Dec 1922 | Box 182 \ M18 img087 | |
| And sketches discussing ring theory, hydrodynamic wedges, and oil scraping. | 26th Dec 1922 | Box 182 \ M18 img088 | |
| Summary of the first family of aero engines from 1916-1919 and their role during World War I. | 21th Feb 1913 | Box 182 \ M18 img089 | |
| Investigations into vehicle juddering and vibration issues. | 21th Feb 1913 | Box 182 \ M18 img090 | |
| Historical overview of the second family of aero-engines from 1919 to 1939, including the Kestrel, Buzzard, Schneider, and Merlin. | 21th Feb 1913 | Box 182 \ M18 img091 | |
| Log of communications and decisions on brake and chassis development from 1912-1914. | 24th Sep 1912 | Box 182 \ M18 img092 | |
| Log of engineering notes and decisions on vehicle components from 1912-1913. | 24th Sep 1912 | Box 182 \ M18 img093 | |
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