| Description | Date | Identifier | |
| Test run report on an Experimental Phantom II, chassis number 23-EX, detailing performance of various components. | 26th May 1930 | Box 11 \ 3 03-page122 | |
| The performance and condition of various car systems and components. | 26th May 1930 | Box 11 \ 3 03-page123 | |
| Page 3 of a road test report detailing incidents, mileage, and fluid consumption during a journey. | 27th Oct 1930 | Box 11 \ 3 03-page124 | |
| List of notes detailing faults found on Phantom II Chassis 23-EX. | 27th Oct 1930 | Box 11 \ 3 03-page125 | |
| Information for the assessment and sale of chassis 23-EX. | 27th Oct 1930 | Box 11 \ 3 03-page126 | |
| Proposal recommending the continued use of the 23-EX experimental car for observing its special features. | 27th Oct 1930 | Box 11 \ 3 03-page127 | |
| List of specifications for Chassis 23-EX for a 10,000 miles trial. | 30th Oct 1930 | Box 11 \ 3 03-page128 | |
| Handling of an experimental car deemed too advanced for current production. | 30th Oct 1930 | Box 11 \ 3 03-page129 | |
| Confirming action will be taken to cover car 23-EX and not use it. | 3rd Nov 1930 | Box 11 \ 3 03-page130 | |
| Proposing the conversion of car 23-EX into an N.2. Series trials car by fitting a new closed body. | 1st May 1931 | Box 11 \ 3 03-page131 | |
| List of alterations required to convert chassis 23-EX to an N.2 series specification. | 4th May 1931 | Box 11 \ 3 03-page132 | |
| Necessary modifications to a chassis for a new body, including an overhaul and fitting new parts. | 4th May 1931 | Box 11 \ 3 03-page133 | |
| Required alterations to chassis 23-EX to convert it into a Trials Car for demonstration. | 14th May 1931 | Box 11 \ 3 03-page134 | |
| Transfer of car 23-EX to the Repair Department and the disposal of its body and oil filter. | 16th May 1931 | Box 11 \ 3 03-page135 | |
| Cover page for the second test of experimental vehicle 24-EX (Left Hand Phantom I) covering 10,000 miles in France. | 2nd Jun 1930 | Box 11 \ 3 03-page136 | |
| Slipping nickel silver lagging on the exhaust system of car 23-EX and a proposed test on a Phantom II. | 2nd Jun 1930 | Box 11 \ 3 03-page137 | |
| Deterioration of ignition wires from exhaust heat and the need for a protective shield. | 17th Jun 1930 | Box 11 \ 3 03-page138 | |
| Letter of authorization for Mr. G.W. Hancock to sign papers for car 24-EX. | 23th Jun 1930 | Box 11 \ 3 03-page139 | |
| Travel arrangements to Sevres and Chateauroux. | 23th Jun 1930 | Box 11 \ 3 03-page140 | |
| To an agent in France arranging the transport and customs clearance for car 24-EX. | 23th Jun 1930 | Box 11 \ 3 03-page141 | |
| Typed note arranging a trial of the Left-Hand Chassis 24-EX, including proposed destinations. | 24th Jun 1930 | Box 11 \ 3 03-page142 | |
| Short typed note amending the day of a planned visit to Sevres. | 24th Jun 1930 | Box 11 \ 3 03-page143 | |
| Note to a transport agent correcting the delivery date for vehicle 24-EX. | 24th Jun 1930 | Box 11 \ 3 03-page144 | |
| Road test report from France detailing a vehicle's performance regarding temperature, overly lively springing, and poor steering. | 28th Jun 1930 | Box 11 \ 3 03-page145 | |
| Changing steering box oil, in response to a report on poor steering and suspension performance. | 28th Aug 1922 | Box 11 \ 3 03-page146 | |
| List of alterations made to left-hand drive chassis 24-EX & 25-EX. | 1st Jul 1930 | Box 11 \ 3 03-page147 | |
| List of modifications and status updates for experimental cars 24-EX and 25-EX. | 1st Jul 1930 | Box 11 \ 3 03-page148 | |
| Car testing issues and final model development for the left-hand Phantom II. | 1st Jul 1930 | Box 11 \ 3 03-page149 | |
| Car issues including radiator fouling, a gearbox oil leak, and throttle quadrant movement after resuming mileage tests. | 1st Jul 1930 | Box 11 \ 3 03-page150 | |
| Vehicle performance, detailing issues with petrol, cooling, suspension, and clutch during a road test. | 1st Jul 1930 | Box 11 \ 3 03-page151 | |
| Vehicle issues including skidding, an unreliable starter motor, carburetter metering, brake squeaks, bonnet rattles, and steering. | 1st Jul 1930 | Box 11 \ 3 03-page152 | |
| Steering issue, lubrication, oil replacement, and driving discomfort in hot weather. | 30th Jun 1930 | Box 11 \ 3 03-page153 | |
| Acceleration tests, showing times taken to accelerate between various speeds, with handwritten calculations. | 30th Jun 1930 | Box 11 \ 3 03-page154 | |
| Dynamo amperage discharge and output specifications at various speeds. | 28th Jun 1930 | Box 11 \ 3 03-page155 | |
| Vehicle issues including water in the petrol, oil and water loss, and problems with valve springs. | 2nd Jul 1930 | Box 11 \ 3 03-page156 | |
| Issues with American valve springs, brakes, a rear axle oil leak, and a carburetter drain problem. | 2nd Jul 1930 | Box 11 \ 3 03-page157 | |
| Inquiry about the weather protection features of a car ahead of a visit to Derby. | 2nd Jul 1930 | Box 11 \ 3 03-page158 | |
| Recommendation to use the Montlhéry track for vehicle testing and to provide a report. | 3rd Jul 1930 | Box 11 \ 3 03-page159 | |
| Oil leaks in the gearbox and oil cleaner, and pressure issues in the front shock absorbers. | 3rd Jul 1930 | Box 11 \ 3 03-page160 | |
| Telegram reporting issues with stretching exhaust valves and a failed front exhaust box. | 4th Jul 1930 | Box 11 \ 3 03-page161 | |
| Multiple vehicle failures including two telegrams sent and further explanations on the exhaust, valves, and starter motor issues. | 4th Jul 1930 | Box 11 \ 3 03-page162 | |
| Oil leak on the rear axle and a fouling propeller shaft on page 2. | 5th Jul 1930 | Box 11 \ 3 03-page163 | |
| Troubleshooting advice regarding shock absorber pressure and high running temperatures. | 5th Jul 1930 | Box 11 \ 3 03-page164 | |
| Telegrams received, a recurring issue with an exhaust valve, and enquiries about the Monthléry track. | 5th Jul 1930 | Box 11 \ 3 03-page165 | |
| Investigation into a No. 3 exhaust valve losing clearance, detailing burnt valve seating bronze and a collapsing tulip edge. | 6th Jul 1930 | Box 11 \ 3 03-page166 | |
| Letter discussing potential causes and solutions for a car overheating, such as mixture, ventilation, and ignition timing. | 7th Jul 1930 | Box 11 \ 3 03-page167 | |
| Test report on American valve springs, maximum speed limitations due to the exhaust system, and issues with squeaking brakes. | 7th Jul 1930 | Box 11 \ 3 03-page168 | |
| Vehicle testing issues including vibrations, fan belt tightness, and engine cooling. | 7th Jul 1930 | Box 11 \ 3 03-page169 | |
| Fuel consumption, engine performance with French petrol, cooling efficiency, and central lubrication. | 8th Jul 1930 | Box 11 \ 3 03-page170 | |
| The catastrophic failure of a cast aluminium front expansion box and a request for a steel replacement. | 8th Jul 1930 | Box 11 \ 3 03-page171 | |
| Request for confirmation to obtain designs for improved results from a solid fan drive. | 9th Jul 1930 | Box 11 \ 3 03-page172 | |
| Typed letter discussing vehicle cooling issues, fan performance tests at Brooklands, and proposed fan belt redesigns. | 9th Jul 1930 | Box 11 \ 3 03-page173 | |
| Car cooling system performance, temperature differentials, and potential causes for water loss during testing. | 9th Jul 1930 | Box 11 \ 3 03-page174 | |
| Letter addressing issues with ignition, valve clearance, brake linings, and the cooling system's temperature correlation with the atmosphere. | 9th Jul 1930 | Box 11 \ 3 03-page175 | |
| Continuation page discussing atmospheric temperatures and centre point lubrication. | 9th Jul 1930 | Box 11 \ 3 03-page176 | |
| Letter confirming the receipt of an expansion box end cover and nuts. | 9th Jul 1930 | Box 11 \ 3 03-page177 | |
| Water and oil temperature tests, modifications, and troubleshooting of overheating issues. | 9th Jul 1930 | Box 11 \ 3 03-page178 | |
| High speed test results recording various temperatures with and without an undershield fitted. | 10th Jul 1930 | Box 11 \ 3 03-page179 | |
| High-speed vehicle test resulting in a catastrophic failure of an aluminum exhaust silencer due to extreme heat. | 10th Jul 1930 | Box 11 \ 3 03-page180 | |
| Transmission knock, radiator water loss, and fan belt performance, concluding with a trip to Paris for exhaust repairs. | 10th Jul 1930 | Box 11 \ 3 03-page181 | |
| Instructions for machining a new front end to a rear silencer and getting out a complete sheet metal conversion. | 10th Jul 1930 | Box 11 \ 3 03-page182 | |
| Telegram detailing a temporary repair to a Phantom's exhaust system. | 12th Jul 1930 | Box 11 \ 3 03-page183 | |
| Phantom II exhaust modifications, performance testing, and the failure of aluminium components due to heat. | 12th Jul 1930 | Box 11 \ 3 03-page184 | |
| Report discussing vehicle cooling system performance, driving style impact on temperatures, and justifying testing methods. | 9th Jul 1930 | Box 11 \ 3 03-page185 | |
| Vehicle testing, detailing issues with the cooling system, carburetion, and steering. | 9th Jul 1930 | Box 11 \ 3 03-page186 | |
| Steering stiffening issues, marked ball pads, and modifications made to create an oil reservoir. | 14th Jul 1930 | Box 11 \ 3 03-page187 | |
| Radiator water loss issues following modifications to the top tank and expansion. | 14th Jul 1930 | Box 11 \ 3 03-page188 | |
| Trial to prevent radiator 'jellying' and the replacement of worn parts. | 14th Jul 1930 | Box 11 \ 3 03-page189 | |
| Issues such as engine 'boom', overheating, and exhaust failure on chassis 25-EX and plans for testing and modification. | 14th Jul 1930 | Box 11 \ 3 03-page190 | |
| Page 2 of a typed document regarding a trip to France to discuss points with Hancock. | 14th Jul 1930 | Box 11 \ 3 03-page191 | |
| Telegram reporting a broken rear nearside subframe support bracket and requesting a replacement part. | 14th Jul 1930 | Box 11 \ 3 03-page192 | |
| Broken sub-frame support bracket and a developing clutch issue. | 14th Jul 1930 | Box 11 \ 3 03-page193 | |
| Potential overlubrication of the clutch from the gearbox and improvements made to the steering system. | 14th Jul 1930 | Box 11 \ 3 03-page194 | |
| Test report on vehicle water temperature, oil leaks, shock dampers, and fuel quality. | 14th Jul 1930 | Box 11 \ 3 03-page195 | |
| Engine performance issues related to the carburetter, throttle, and radiator cooling system. | 14th Jul 1930 | Box 11 \ 3 03-page196 | |
| Radiator water flow issues and a proposed modification to add a double outlet. | 14th Jul 1930 | Box 11 \ 3 03-page197 | |
| Diagram illustrating a modification to water flow within a radiator. | 14th Jul 1930 | Box 11 \ 3 03-page198 | |
| Hand-drawn diagram illustrating a potential fouling issue with a thermostat during a swerving motion. | 14th Jul 1930 | Box 11 \ 3 03-page199 | |
| Inquiry regarding the collapse of a front expansion chamber on a 24-EX Phantom II during a 10,000-mile test. | 14th Jul 1930 | Box 11 \ 3 03-page200 | |
| The non-standardised exhaust system for the 24-EX model and the unsuitability of using aluminium. | 15th Jul 1930 | Box 11 \ 3 03-page201 | |
| Letter to G.W. Hancock addressing overheating and exhaust system issues on car 24-EX. | 15th Jul 1930 | Box 11 \ 3 03-page202 | |
| Letter discussing ongoing issues with a car's engine and steering ball ends, and requesting a summary of the troubles. | 15th Jul 1930 | Box 11 \ 3 03-page203 | |
| Subframe repair, ongoing issues with water loss from the radiator, and receipt of new parts. | 15th Jul 1930 | Box 11 \ 3 03-page204 | |
| Seeking clarification on the type of bonnet ventilation for vehicle 24-EX being tested in France. | 16th Jul 1930 | Box 11 \ 3 03-page205 | |
| Recurring water loss defect found during the 10,000-mile test of the 24-EX vehicle, comparing it to a similar issue on the 23-EX. | 17th Jul 1930 | Box 11 \ 3 03-page206 | |
| List outlining a rotation of performance and cooling tests conducted at the Montlhéry track. | 17th Jul 1930 | Box 11 \ 3 03-page207 | |
| Test results for water loss and temperatures under various speed and component configurations. | 18th Jul 1930 | Box 11 \ 3 03-page208 | |
| Temperature test results for water, oil, and air under various vehicle operating conditions. | 18th Jul 1930 | Box 11 \ 3 03-page209 | |
| Series of cooling system tests measuring water/oil temperatures and water loss under various conditions. | 17th Jul 1930 | Box 11 \ 3 03-page210 | |
| Series of temperature and performance tests at 60 M.P.H. under various conditions. | 17th Jul 1930 | Box 11 \ 3 03-page211 | |
| Vehicle testing at the Montlhéry track, including comparisons to Brooklands and logistical details. | 18th Jul 1930 | Box 11 \ 3 03-page212 | |
| Page 2 of a report detailing the investigation into a clutch failure caused by a cracked cast iron pressure plate. | 18th Jul 1930 | Box 11 \ 3 03-page213 | |
| Confirmation of receipt for exhaust fittings, rear subframe brackets, and a rear silencer part. | 18th Jul 1930 | Box 11 \ 3 03-page214 | |
| Standardization of shutter ventilators on car bonnets, distinguishing them from louvred bonnets. | 18th Jul 1930 | Box 11 \ 3 03-page215 | |
| Cooling system tests conducted on the Montlhéry track in France. | 19th Jul 1930 | Box 11 \ 3 03-page216 | |
| Analysis of radiator cooling efficiency, engine overheating issues, and a proposed redesign of the cylinder head. | 19th Jul 1930 | Box 11 \ 3 03-page217 | |
| Engine cooling system tests, concluding a re-designed cylinder head and more efficient radiator is required. | 19th Jul 1930 | Box 11 \ 3 03-page218 | |
| Report diagnosing and resolving a steering lubrication issue on vehicle 24-EX compared to 23-EX. | 19th Jul 1930 | Box 11 \ 3 03-page219 | |
| Issues with camshaft squawks, tappet wear, gearbox oil leaks, and servo lubrication. | 19th Jul 1930 | Box 11 \ 3 03-page220 | |
| Faults found in a vehicle's lubrication, rear axle, clutch, and carburation systems. | 19th Jul 1930 | Box 11 \ 3 03-page221 | |
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