| Description | Date | Identifier | |
| Road tests comparing a Twin Zenith carburetter with a Solex carburetter on a 'Japan' engine. | 11th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan075 | |
| Carburettor design, comparing different types and outlining principles for fuel mixture control during acceleration and steady running. | 11th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan076 | |
| Carburettor testing, comparing Zenith and Stromberg models and discussing fuel consumption, injection and pressure balance. | 11th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan077 | |
| Diagrammatic sketch of a Stutz-Zenith carburettor. | 7th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan078 | |
| Accelerating pumps for carburetters, referencing a Stromberg manual. | 11th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan079 | |
| Carburettors, including results from a Claudel aero carburetter and requirements for car work. | 16th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan080 | |
| Different designs for shock absorbers and their performance. | 16th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan081 | |
| Sending a Powerplus pump for trial, detailing its performance and re-assembly advice. | 17th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan082 | |
| The deterioration of ignition wires from exhaust manifold heat and the need for a shield. | 17th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan083 | |
| The performance and testing of Lodge X.202 sparking plugs against other models. | 18th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan084 | |
| The performance and condition of several Phantom II cars with subframes after considerable mileage. | 18th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan085 | |
| The condition of car bodies after mileage testing, focusing on window rattles and the benefits of the subframe. | 18th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan086 | |
| Comparison of the time taken by coachbuilders to finish subframe versus non-subframe car bodies. | 20th Aug 1930 | West Wittering \ U \ May1930-July1930 Scan087 | |
| Dangerous position of a petrol filter on a left-hand chassis, highlighting fire risks and vaporisation issues. | 20th Aug 1930 | West Wittering \ U \ May1930-July1930 Scan088 | |
| Test report on a 25 HP Nitralloy crankshaft for a China C.1 engine. | 21th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan089 | |
| Comparing the wear marks on a standard crankshaft with those on a Nitralloy shaft. | 30th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan090 | |
| The causes of petrol gauge failures and the modifications made to rectify the issues. | 24th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan091 | |
| Issues and improvements related to Nivex and Claudel Hobson petrol gauges. | 24th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan092 | |
| The advantages, installation, and reliability of the 'Nivex' petrol gauge. | 24th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan093 | |
| The final page of a typed memo concluding a comparison with American counterparts. | 25th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan094 | |
| Cooling system tests for the 19-EX car at Brooklands, prompted by issues with the Phantom II model. | 25th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan095 | |
| Car cooling system improvements and ventilation tests. | 25th May 1930 | West Wittering \ U \ May1930-July1930 Scan096 | |
| Cooling system performance, radiator variations, and oil temperature during vehicle testing. | 25th May 1930 | West Wittering \ U \ May1930-July1930 Scan097 | |
| Test report on ignition advance, overheating, petrol supply issues, and lap speed performance for cars 18-EX and 19-EX. | 25th Jun 1931 | West Wittering \ U \ May1930-July1930 Scan098 | |
| Analysis of an American car's performance, including factors for slow speed and the effects of bonnet ventilation and fan belt adjustments. | 25th Jan 1932 | West Wittering \ U \ May1930-July1930 Scan099 | |
| Tests of the water circulation, cooling system, and bonnet ventilation, including comparisons with an American Phantom II. | 25th Jun 1931 | West Wittering \ U \ May1930-July1930 Scan100 | |
| Improving vehicle cooling for high-speed performance, covering fans, radiators, and bonnets. | 25th Jun 1931 | West Wittering \ U \ May1930-July1930 Scan101 | |
| Graph showing the temperature rise of top water, oil, and bottom water over a 20-mile run. | 26th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan102 | |
| Blank document page with a receiving date stamp from Derby. | 26th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan103 | |
| Graph detailing overheating temperatures for a PII Cabriolet 19 E.X. under various ventilation configurations. | 26th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan104 | |
| Graph showing the effect of different bonnet and shutter configurations on engine water temperature. | 26th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan105 | |
| Graph plotting oil and water temperatures against miles run under specific speed and ventilation test conditions. | 26th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan106 | |
| Bar graph comparing critical ATS temperature for a spring tensioned fan versus a positively tensioned fan belt. | 26th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan107 | |
| Graph comparing top water temperature versus miles run for two radiator configurations, 18 E.X. and 19 E.X. | 26th Jan 1930 | West Wittering \ U \ May1930-July1930 Scan108 | |
| Blueprint illustrating a modification to the front undershield to improve the cooling system. | 26th Jan 1930 | West Wittering \ U \ May1930-July1930 Scan109 | |
| Outlining an investigation into petrol gauge failures and the subsequent modifications tested. | 28th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan110 | |
| The technical issues and improvements related to various petrol gauges, specifically comparing the 'Nivex' and 'Hobson' models. | 28th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan111 | |
| Continued discussion on the advantages and fitting procedures for the 'Kivex' gauge. | 28th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan112 | |
| Continued memorandum discussing the satisfactory performance of the 'Nivex' gauge after 10,000 miles of testing. | 28th Jun 1930 | West Wittering \ U \ May1930-July1930 Scan113 | |
| Twelve new features fitted to the experimental 20/25 HP car, 18-G4. | 2nd Jul 1930 | West Wittering \ U \ May1930-July1930 Scan114 | |
| Continued list of features including central lubrication to axles and thermostat operated shutters. | 2nd Jul 1930 | West Wittering \ U \ May1930-July1930 Scan115 | |
| The testing of Ferranti ammeters against Park Royal instruments for standardisation. | 4th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan116 | |
| Continued discussion on standardizing Ferranti ammeters for 40/50 HP and 20/25 HP chassis. | 4th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan117 | |
| The testing of a special, enlarged Autovac float designed to prevent failures caused by high temperatures. | 4th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan118 | |
| Continued report recommending the adoption of a modification to the Autovac fuel system based on successful trials. | 4th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan119 | |
| The testing and improvements of a Boyce electric clock, including its ability to run without power. | 1st Jul 1930 | West Wittering \ U \ May1930-July1930 Scan121 | |
| The development and testing of an electric clock, detailing faults, improvements, and interactions with the supplier, Gent & Co. | 5th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan122 | |
| Continued report on the testing of a clock's circuit-breaking mechanism following a modification. | 1st Jul 1930 | West Wittering \ U \ May1930-July1930 Scan123 | |
| Plans for comparative overheating tests with other car makes. | 8th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan124 | |
| Further Brooklands tests for a special engine, focusing on fuel supply and the autovac system. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan125 | |
| Fuel supply issues related to vacuum pump efficiency at high temperatures and cooling system fan belt tests. | 28th Jul 1931 | West Wittering \ U \ May1930-July1930 Scan126 | |
| Analysis of radiator water temperature, fan performance, and fuel supply issues leading to overheating. | 2nd Jul 1930 | West Wittering \ U \ May1930-July1930 Scan127 | |
| Report comparing radiator matrices, bottom outlets, and circulation efficiency. | 2nd Jul 1934 | West Wittering \ U \ May1930-July1930 Scan128 | |
| Analysis of the factors affecting engine water temperature at various speeds, including comparisons with other vehicles. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan129 | |
| Temperature readings, cooling system issues, and recommendations for improvements. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan130 | |
| Proposed tests on the Phantom II's cooling system and fuel supply. | 2nd Jul 1930 | West Wittering \ U \ May1930-July1930 Scan131 | |
| Graphs illustrating the effect of fan configuration, speed, and ventilation on the cooling system's water temperature. | 2nd Jul 1930 | West Wittering \ U \ May1930-July1930 Scan132 | |
| Blank grid paper stamped by the Print Room in Derby. | 10th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan133 | |
| Series of graphs and diagrams illustrating the effect of water circulation on engine overheating. | 2nd Jul 1930 | West Wittering \ U \ May1930-July1930 Scan134 | |
| Graph plotting top and bottom water temperatures against a series of seven sequential test conditions conducted at Brooklands. | 2nd Jul 1930 | West Wittering \ U \ May1930-July1930 Scan135 | |
| Graph plotting the effect of bottom water temperature on circulation flow and pump suction depression at a constant engine speed. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan136 | |
| Recent modifications to standard Phantom 6-volt unit batteries, covering plate width and separators. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan137 | |
| Modifications to battery cells and containers to prevent short-circuiting and improve handling. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan138 | |
| Modifications and testing for battery connecting links, vents, and connections. | 1st Jul 1930 | West Wittering \ U \ May1930-July1930 Scan139 | |
| Experimental testing and modifications of Exide and P & R car batteries. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan140 | |
| The performance and durability of Young batteries and Wilderman separators. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan141 | |
| New 'Wilderman separator' made of spongy porous ebonite, its properties, and comparison to other battery separators. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan142 | |
| The physical and electrical properties of battery separators, comparing them to wooden alternatives. | 1st Jul 1930 | West Wittering \ U \ May1930-July1930 Scan143 | |
| The chemical properties of porous ebonite battery separators and arrangements for testing a Phantom battery. | 9th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan144 | |
| Decision to conduct tests on a battery constructed with box-type separators enclosing the positive plates. | 10th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan145 | |
| Cooling tests for 25 HP and 40/50 HP engines, focusing on radiator design and airflow for the Phantom II. | 10th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan146 | |
| Upcoming test of a square tube radiator and comparisons with other cars. | 1st Jul 1930 | West Wittering \ U \ May1930-July1930 Scan147 | |
| Recommendation to adopt a one-piece 6-compartment moulded cell container for the 20/25 HP battery. | 1st Jul 1930 | West Wittering \ U \ May1930-July1930 Scan148 | |
| Battery container design, supplier arrangements, and a proposal for a sheet metal battery box. | 11th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan149 | |
| Battery box design, comparing sheet metal and teak, and recommending lid ventilation. | 11th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan150 | |
| The failure of aluminium parts in a modified Phantom II exhaust system due to heat. | 14th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan151 | |
| Improvements to the rear end of a Phantom II chassis without a spare wheel carrier. | 23th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan152 | |
| Continued memorandum discussing the practicality of a design, noting issues with toolbox accessibility. | 23th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan153 | |
| Phantom II clutch failure due to a cracked cast iron pressure plate. | 23th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan154 | |
| Blueprint of a failed G.I. Pressure Plate with annotated cracks. | 23th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan155 | |
| Quoting a report on water and air temperatures recorded during a 250-mile car run, noting an attached chart. | 23th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan156 | |
| Line graph charting water and air temperature readings taken every 50 miles over a four day period. | 16th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan157 | |
| Blank page with a purple 'Print Room' stamp in the bottom right corner. | 23th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan158 | |
| Extract from a report on the necessity of the gearbox undershield, concluding it could be removed to save manufacturing costs. | 23th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan159 | |
| Radiator tests carried out on the Montlhery Track with car 24-EX. | 23th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan160 | |
| List of tests performed on a vehicle at the Montlhery track. | 17th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan161 | |
| Test report on vehicle water loss and temperatures at various speeds and configurations. | 18th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan162 | |
| Test results of engine water, oil, and air temperatures under various driving and engine configuration tests. | 18th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan163 | |
| Test report detailing temperature readings and water loss under different vehicle operating conditions. | 17th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan164 | |
| Log of temperature tests conducted under various conditions including different fuel types and ignition settings. | 17th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan165 | |
| Failures and the redesign of the Phantom II subframe rear support bracket. | 24th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan166 | |
| Sketch and note describing the strengthening of a new bracket at its weak points. | 24th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan167 | |
| Blueprint for a strengthened rear support for the subframe of a Phantom II vehicle. | 24th Jul 1930 | West Wittering \ U \ May1930-July1930 Scan168 | |
| Faults and troubles experienced with vehicle 18.G.IV after 10,000 miles. | 30th Jan 1931 | West Wittering \ V \ 2January1931-April1931 Scan001 | |
| Engine performance, including acceleration tests, oil temperature, and analysis of the cylinder head and valve components. | 30th Jan 1931 | West Wittering \ V \ 2January1931-April1931 Scan002 | |
| Condition report on various engine components including valves, rockers, tappets, and camshafts after testing. | 30th Jan 1931 | West Wittering \ V \ 2January1931-April1931 Scan003 | |
| Inspection report detailing engine component failures, specifically pistons and connecting rods. | 30th Jan 1931 | West Wittering \ V \ 2January1931-April1931 Scan004 | |
| Crankshaft journal wear and the performance evaluation of a Low Inertia Spring Drive. | 30th Jan 1931 | West Wittering \ V \ 2January1931-April1931 Scan005 | |
| The condition and performance of various engine components after testing. | 30th Jan 1931 | West Wittering \ V \ 2January1931-April1931 Scan006 | |
| The performance and issues with exhaust fittings, a magneto and dynamo drive, and an oil pump during testing. | 30th Jan 1931 | West Wittering \ V \ 2January1931-April1931 Scan007 | |
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