| Description | Date | Identifier | |
| Request for information on the 'SS' Chassis regarding ignition timing and combustion chamber capacity. | 12th Jul 1929 | Box 65a \ 3 scan0075 | |
| Recommended ignition timing settings based on tests to reduce engine detonation. | 15th Jul 1929 | Box 65a \ 3 scan0076 | |
| Graph showing power variation with ignition timing for S.S. Engines. | 15th Jul 1929 | Box 65a \ 3 scan0077 | |
| Measuring the clearance volume of the combustion space and calculating the compression ratio. | 15th Jul 1929 | Box 65a \ 3 scan0078 | |
| Recommending the use of a lower engine compression ratio for S.S. Cars to improve smoothness at the cost of performance. | 17th Jul 1929 | Box 65a \ 3 scan0079 | |
| Blueprint detailing a modification to a cylinder head for S.S. Engines to achieve a 4.25 compression ratio. | 16th Jul 1925 | Box 65a \ 3 scan0080 | |
| 'Sg' to 'Hs' requesting two more side-view photographs of the 18-EX. | 17th Jul 1929 | Box 65a \ 3 scan0081 | |
| Cover note regarding a list of details delayed by the Drawing Office for the J.2 Series, and the release of Axle Forgings. | 19th Jul 1929 | Box 65a \ 3 scan0082 | |
| List of parts held up by the Drawing Office for the 40/50 HP J2 Series chassis. | 4th Jul 1929 | Box 65a \ 3 scan0083 | |
| Secret memo discussing a car with defective pistons sent to Derby for repair and positive feedback on the 20 HP model's performance. | 16th Jul 1929 | Box 65a \ 3 scan0084 | |
| From Hs. to Sg. regarding photographs of the 18-EX car. | 19th Jul 1929 | Box 65a \ 3 scan0085 | |
| Issues with the 'SS' chassis concerning steering, spring gaiters, and the exhaust system. | 23th Jul 1929 | Box 65a \ 3 scan0086 | |
| Trade-off between engine performance versus smoothness and silence by lowering compression on S.S. cars. | 23th Jul 1929 | Box 65a \ 3 scan0087 | |
| Discrepancies on the S.S. Chassis compared to its standardisation specification. | 25th Jul 1929 | Box 65a \ 3 scan0088 | |
| Responding to feedback on the coachwork, speedometer, and steering for car 18-EX. | 26th Jul 1929 | Box 65a \ 3 scan0089 | |
| Replying to an earlier memo, detailing expected differences in production S.S. Cars concerning spring oiling, servo lining, and exhaust fittings. | 26th Jul 1929 | Box 65a \ 3 scan0090 | |
| Modifications for S.S. cars to prevent clicking and improve lubrication in steering and damper components. | 30th Jul 1929 | Box 65a \ 3 scan0091 | |
| Secret memo from 'Sg' to 'Hs' discussing the performance effects of lower compression on 'SS' cars. | 30th Jul 1929 | Box 65a \ 3 scan0092 | |
| Production test issues with the S.S. Chassis, covering the clutch brake, exhaust joint, and propeller shaft. | 8th Aug 1929 | Box 65a \ 3 scan0093 | |
| Issues concerning the vacuum pump, slipper flywheel clearance, and tappets. | 12th Aug 1929 | Box 65a \ 3 scan0094 | |
| Brake groaning and exhaust spitting issues on an SS chassis. | 12th Aug 1929 | Box 65a \ 3 scan0095 | |
| Recommended loads for 'S.S' hydraulic dampers without dynamic restrictions. | 10th Aug 1929 | Box 65a \ 3 scan0096 | |
| Alteration to the setting of the S.S. Side Steering Tube. | 12th Aug 1929 | Box 65a \ 3 scan0097 | |
| Blueprint showing a modified S.S. tube setting with dimensional annotations. | 12th Aug 1929 | Box 65a \ 3 scan0098 | |
| Graph plotting load in pounds against the relative movement of two ball ends for different component tests and settings. | 13th Aug 1929 | Box 65a \ 3 scan0099 | |
| Comparative testing of different sized radiator tubes for the F.2.B series. | 13th Aug 1929 | Box 65a \ 3 scan0100 | |
| Drilling a breather hole in the Change Gear Bracket G.77500 to prevent oil leaks. | 14th Aug 1929 | Box 65a \ 3 scan0101 | |
| Test comments and required improvements for the S.S. Production Chassis. | 19th Aug 1929 | Box 65a \ 3 scan0102 | |
| Report page detailing a list of vehicle faults and performance observations. | 19th Aug 1929 | Box 65a \ 3 scan0103 | |
| Continued list of technical points and suggested improvements for a vehicle, numbered 12 through 20. | 19th Aug 1929 | Box 65a \ 3 scan0104 | |
| Issues with throttle governor sensitivity, engine tray drainage, and chassis weight. | 19th Aug 1929 | Box 65a \ 3 scan0105 | |
| Visit by Sir Henry Seagrave with a Hispano Suiza car, detailing its specifications and a performance comparison. | 20th Mar 1929 | Box 65a \ 3 scan0106 | |
| Performance test report covering a car's acceleration, maximum speed, steering, and brakes. | 20th Mar 1929 | Box 65a \ 3 scan0107 | |
| Performance comparison report between a Hispano sports car and the Continental Phantom, focusing on braking, steering, and suspension. | 21th Aug 1929 | Box 65a \ 3 scan0108 | |
| The over-stressing of driving springs in a lower inertia spring drive design. | 21th Aug 1929 | Box 65a \ 3 scan0109 | |
| The potentially illegal positioning of the front numberplate on the 'S.S.' model and the design of modified brackets. | 23th Aug 1929 | Box 65a \ 3 scan0110 | |
| Requesting an update on the design for thermostat operated shutters for S.S. cars. | 30th Aug 1929 | Box 65a \ 3 scan0111 | |
| Proposing to send Experimental car No. 21-EX to London for S.S. Trials. | 13th Sep 1929 | Box 65a \ 3 scan0112 | |
| Secret memorandum outlining the design objectives for improving SS cars, focusing on riding quality, performance, and weight distribution. | 16th Sep 1929 | Box 65a \ 3 scan0113 | |
| Improvements in chassis design, engine performance, and a new central oiling system. | 16th Sep 1929 | Box 65a \ 3 scan0114 | |
| Technical specification detailing the transmission, clutch, gearbox, propeller shaft, and rear axle. | 16th Sep 1929 | Box 65a \ 3 scan0115 | |
| Description of the vehicle's suspension system, including dampers, springs, and axles. | 16th Sep 1929 | Box 65a \ 3 scan0116 | |
| Description of the lubrication system, frame, and steering gear. | 16th Sep 1929 | Box 65a \ 3 scan0117 | |
| Design improvements to the front axle, road wheels, braking system, radiator, battery, and body mounting. | 16th Sep 1929 | Box 65a \ 3 scan0118 | |
| Improvements to the instruments and engine of a chassis. | 16th Sep 1929 | Box 65a \ 3 scan0119 | |
| Listing ten key improvements to a car model, including details on the vacuum pump and electric starter system. | 17th Sep 1929 | Box 65a \ 3 scan0120 | |
| Requesting the instruction of three complete low inertia type slipper wheels with a modified spring retaining device for S.S. cars. | 17th Sep 1929 | Box 65a \ 3 scan0121 | |
| Requesting confirmation on the correct type, quantity and price of special grease for the Phantom II chassis back axle. | 18th Sep 1929 | Box 65a \ 3 scan0122 | |
| Alternative positions for the 'S.S.' front numberplate. | 20th Sep 1929 | Box 65a \ 3 scan0123 | |
| Listing outstanding issues and required improvements for the S.S. Production Chassis. | 21th Sep 1929 | Box 65a \ 3 scan0124 | |
| List of technical issues and points for attention regarding various car components. | 21th Sep 1929 | Box 65a \ 3 scan0125 | |
| Issues with instrument colours, wiring, and cylinder lubrication. | 21th Sep 1929 | Box 65a \ 3 scan0126 | |
| Development of sports cars for the Phantom II & 20 HP models, covering body types and engine power enhancements. | 24th Sep 1929 | Box 65a \ 3 scan0127 | |
| Requesting the overnight removal of a flywheel from the 'BUMP CAR' 23-EX. | 25th Sep 1929 | Box 65a \ 3 scan0128 | |
| Sports car development, focusing on the Phantom II and discontinuing the 20 HP model. | 9th Sep 1929 | Box 65a \ 3 scan0129 | |
| Urgent query regarding a discrepancy in the Phantom II's engine power specifications between the English and French catalogues. | 27th Sep 1929 | Box 65a \ 3 scan0130 | |
| On testing and suggesting modifications for the Phantom II valve spring removing tackle. | 28th Sep 1929 | Box 65a \ 3 scan0131 | |
| Progress report on car development, detailing tests on a Phantom II and other components like crankshafts, pistons, and carburetors. | 28th Sep 1929 | Box 65a \ 3 scan0132 | |
| Complaints and potential modifications for the high-speed steering on the Phantom II model. | 30th Sep 1929 | Box 65a \ 3 scan0133 | |
| The 20 HP chassis for Japan, detailing engine modifications and the status of experimental cars. | 1st Oct 1929 | Box 65a \ 3 scan0134 | |
| Availability of parts for the Phantom II High Speed Steering. | 1st Oct 1929 | Box 65a \ 3 scan0135 | |
| Visit to discuss production difficulties and performance of the S.S. and 20 HP cars. | 4th Oct 1929 | Box 65a \ 3 scan0136 | |
| List of reported issues and features requiring attention on the Phantom II chassis. | 9th Oct 1929 | Box 65a \ 3 scan0137 | |
| Complaint about front step brackets on an Open Trials Car and proposing a solution for splayed wings. | 9th Oct 1929 | Box 65a \ 3 scan0138 | |
| Clarifying that curved front step brackets are only for Phantom IIs with side wheel carriers. | 11th Oct 1929 | Box 65a \ 3 scan0139 | |
| Potential modifications to the Phantom II's axle ratio and suspension following a Brooklands record attempt. | 11th Oct 1929 | Box 65a \ 3 scan0140 | |
| Choice between Staybrite and chromium finishes for various car components. | 14th Oct 1929 | Box 65a \ 3 scan0141 | |
| Proposed improvements for the Phantom II vehicle, listing nine new parts for a 10,000-mile test. | 5th Oct 1929 | Box 65a \ 3 scan0142 | |
| Modifications to car components like spare wheels, radiators, and lubrication systems. | 5th Oct 1929 | Box 65a \ 3 scan0143 | |
| Customer complaints regarding noisy shock absorbers and potential solutions. | 15th Oct 1929 | Box 65a \ 3 scan0144 | |
| Update on the status and agreed position of the front numberplate. | 15th Oct 1929 | Box 65a \ 3 scan0145 | |
| Design and supply of front step brackets for the Phantom II chassis. | 16th Oct 1929 | Box 65a \ 3 scan0146 | |
| Instructions to order 3 sets of chromium-plated parts for the Phantom II Chassis J2 series test car. | 16th Oct 1929 | Box 65a \ 3 scan0147 | |
| Short typed memo regarding the future of experimental cars 22-EX and 18-EX. | 18th Oct 1929 | Box 65a \ 3 scan0148 | |
| From 'Sg' to 'Hs' regarding a 10,000 miles test on a Phantom II. | 16th Oct 1929 | Box 65a \ 3 scan0149 | |
| Questioning the necessity of a car in the Experimental Department due to cost considerations. | 16th Oct 1929 | Box 65a \ 3 scan0150 | |
| Status and plans for experimental cars 18-EX and 21-EX. | 21th Oct 1929 | Box 65a \ 3 scan0151 | |
| Confirming details about experimental cars 21-EX and 18-EX, including a repaint and delivery schedule. | 21th Oct 1929 | Box 65a \ 3 scan0152 | |
| Post-show logistics for the 18-EX car to generate orders. | 26th Oct 1929 | Box 65a \ 3 scan0153 | |
| Requirement for a hypoid gear on the Phantom II Sports Car, including specifications and design considerations. | 26th Oct 1929 | Box 65a \ 3 scan0154 | |
| The return date for the 18-EX car. | 28th Oct 1929 | Box 65a \ 3 scan0155 | |
| Parts for a 10,000-mile test of a Phantom II and the test's start date. | 29th Oct 1929 | Box 65a \ 3 scan0156 | |
| Urgent memo regarding the collection of chassis 21.EX for customer demonstrations in Liverpool. | 1st Nov 1929 | Box 65a \ 3 scan0157 | |
| Confirmation and a copy of a speed certificate for the Phantom II. | 4th Nov 1929 | Box 65a \ 3 scan0158 | |
| The unofficial lap speeds of Phantom cars at Brooklands track. | 5th Nov 1929 | Box 65a \ 3 scan0159 | |
| Request for a photograph or chassis number of a Closed Limousine that lapped Brooklands at 80 mph for distribution to overseas representatives. | 7th Nov 1929 | Box 65a \ 3 scan0160 | |
| Effects of increased tyre diameter on the Phantom chassis, specifically regarding the turning circle. | 7th Nov 1929 | Box 65a \ 3 scan0161 | |
| Analysis of petrol supply issues to the carburettor, detailing flow rate reductions caused by various obstructions. | 7th Nov 1923 | Box 65a \ 3 scan0162 | |
| Fluid delivery rates under different supply conditions and identifying flow obstructions. | 7th Nov 1929 | Box 65a \ 3 scan0163 | |
| Data table comparing delivery results through a needle valve under various conditions. | 7th Nov 1929 | Box 65a \ 3 scan0164 | |
| Needle valve and carburetter tests with recommendations for improving fuel flow. | 7th Nov 1929 | Box 65a \ 3 scan0165 | |
| Table comparing flow rates between a standard filter and a modified filter under two different conditions. | 1st Nov 1929 | Box 65a \ 3 scan0166 | |
| Drawings for a European Propaganda Car, Phantom II. | 11th Nov 1929 | Box 65a \ 3 scan0167 | |
| List of parts and alterations for the next 10,000 miles test car. | 12th Nov 1929 | Box 65a \ 3 scan0168 | |
| Outlining problems and proposed improvements for the Phantom II model. | 14th Nov 1929 | Box 65a \ 3 scan0169 | |
| List of proposed modifications and improvements for vehicle components and specific models like the 20 HP and 'F' Engine. | 4th Nov 1929 | Box 65a \ 3 scan0170 | |
| Engine improvements, including carburetters, superchargers, reduction gears, and the 'H' engine. | 14th Nov 1929 | Box 65a \ 3 scan0171 | |
| Standardisation of an 'SS' Chassis to replace the Phantom. | 13th Jul 1929 | Box 65a \ 3 scan0172 | |
| List of reported defects requiring improvement, with handwritten notes and approvals. | 29th Feb 1932 | Box 65a \ 3 scan0173 | |
| Lost key and an incorrect replacement key for car 18-EX. | 27th Nov 1929 | Box 65a \ 3 scan0174 | |
| | | | |