| Description | Date | Identifier | |
| Redesign of an accessory distribution board to include an earth terminal. | 28th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan078 | |
| Problems and potential improvements for various car clocks, including A.T. and Watford models. | 28th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan079 | |
| Proposed design changes to an SS. Exhaust Manifold, including pipe diameter, material, and construction method. | 29th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan080 | |
| Design and completion of a press button starter switch, referencing blueprint LeC.2641. | 29th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan081 | |
| Two small alterations to the throttle governor control system. | 29th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan082 | |
| Proposed improvements to the lubrication system of the SS front axle control damper. | 29th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan083 | |
| Adapting a front spring experiment for the rear spring front anchorage, questioning a design difference. | 29th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan084 | |
| Secret memo regarding an oil leakage issue observed on SS. Camshaft dowel screws and a proposed solution. | 29th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan085 | |
| Proposal for providing a means of end adjustment for lining up timing gears in the wheelcase. | 29th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan086 | |
| Secret memorandum including a telegram and a sketch outlining suggestions for a simpler and more practical SS exhaust pipe and silencer design. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan087 | |
| Design of a car's exhaust system, including pipe routing, silencer placement, and managing fumes. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan088 | |
| With hand-drawn sketches suggesting designs for an exhaust pipe joint. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan089 | |
| Insufficient bearing surface on front springs and wear on pendulum lever ball ends. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan090 | |
| Suggestions for protecting overflow pipes and problems with soldered joints on petrol and lubrication pipes. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan091 | |
| Simplification of the petrol supply and reserve system using the autovac tank and a needle valve. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan092 | |
| Use of liners and bushes for main bearings, referencing blueprints LeC. 2655 and 2656. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan093 | |
| Secret memo recommending the standardisation of an electrical screenwiper drive, replacing the mechanical version. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan094 | |
| Poor condition of Colonel Fell's car and suggesting a more suitable vehicle with better features like four-wheel brakes. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan095 | |
| With diagrams discussing design options for an SS exhaust system and flexible engine mounting. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan096 | |
| Typed communication discussing design suggestions for a crankchamber. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan097 | |
| Design improvements for a sequence starter by rounding the corners. | 30th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan098 | |
| Proposed silencer for an air pump connection on the carburetter air inlet, referencing blueprint LeC. 2659. | 31th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan099 | |
| Telegram confirmation approving engine mounting, reduced control height, and further testing of a Klaxon switch. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan100 | |
| Investigation into offsetting tappets for right and left-handed engines and its effects on the valve gear. | 5th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan101 | |
| Standardisation of double wiring and single central contact fittings for accessory distribution boards. | 5th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan102 | |
| Carburetter design improvements and comparing existing and new schemes. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan103 | |
| Improvements to the SS and G.4 induction system heating, and alternatives to fitting a thermostat. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan104 | |
| Options for SS engine mounting, including rubber specifications, frame stiffness, and placement. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan105 | |
| Subframe design and marketability of an open touring body. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan106 | |
| Secret memo listing drawings for an 'SS' valve cover, inlet cam form, and valve gear. | 2nd Feb 1929 | West Wittering \ T \ January1929-February1929 Scan107 | |
| Issues with oil leaks and fastenings on the SS Valve Rocker Cover, proposing design modifications. | 7th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan108 | |
| Brake performance issues and an oversight regarding water guards on axles. | 7th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan109 | |
| Impracticality of Bijur valves and restrictors for central oiling and suggesting an alternative. | 3rd Feb 1929 | West Wittering \ T \ January1929-February1929 Scan110 | |
| Internal memorandum discussing design alterations for SS valve gear and desaxe tappets. | 7th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan111 | |
| Suitability of a spring washer versus a sheet metal lock for camshaft bearings. | 7th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan112 | |
| Secret memo proposing a new design for a vacuum pump oil pipe connection due to issues with the existing tee joint. | 4th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan113 | |
| The excessive weight and thickness of coachwork doors, proposing an investigation with coachbuilders to find a solution. | 5th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan114 | |
| Agreed modifications to the subframes of SS and India bodies, including diagrams. | 2nd May 1929 | West Wittering \ T \ January1929-February1929 Scan115 | |
| Agreements on chassis, subframe, and gearbox modifications, page 2. | 5th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan116 | |
| Design, supply, and features of a framed instrument panel. | 5th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan117 | |
| Proposing a chassis engine carburettor design using two butterfly valves in series. | 5th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan118 | |
| Suggestion to prevent the 'SS' servo plates from seizing. | 6th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan119 | |
| Improved scheme for the SS Front Shock Damper, specifically regarding ball end lubrication. | 6th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan120 | |
| Design of a rear wheel carrier and a new single filter for the 16-G.4 model. | 6th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan121 | |
| Simpler and quieter design for an SS chassis engine valve rocker cover. | 9th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan122 | |
| Different schemes for valve rocker lubrication. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan123 | |
| Road test report and review of car specimen 18-EX after 10,000 miles of use. | 6th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan124 | |
| Outlining technical updates and suggestions for the 'SS' chassis. | 6th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan125 | |
| Secret memorandum discussing issues with rear axle oil drain holes being choked with mud and proposing design solutions. | 7th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan126 | |
| Loss of oil pressure after braking and proposing modifications to the crankcase sump. | 7th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan127 | |
| Comparison of engine oil suction systems with diagrams for the SS and Phantom chassis. | 7th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan128 | |
| Report comparing oil pump and strainer designs between SS and Phantom chassis, proposing a new scheme. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan129 | |
| Use of sheet metal lock washers for camshaft bearings and substituting soft aluminium washers to prevent oil leaks. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan130 | |
| Recommendation for the standardisation of Staybrite steel in the exhaust system for the SS chassis. | 8th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan131 | |
| Secret memo discussing modifications for SS rear brake camshafts, adapting them to the EAC. 14. scheme. | 9th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan132 | |
| Different schemes and alternatives for an SS exhaust system design. | 9th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan133 | |
| Three schemes for improving the lubrication of the SS valve gear. | 11th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan134 | |
| Modifications to the SS engine oil level indicator to improve its accuracy. | 1st Feb 1929 | West Wittering \ T \ January1929-February1929 Scan135 | |
| Outlining strategies and suggestions for reducing the thickness of car doors to increase interior seat width. | 12th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan136 | |
| Secret memorandum proposing a new, simpler, and lighter design for a serrated coupling to replace fabric couplings. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan137 | |
| Modification to the float lever ratio to correct the oil indicator reading. | 12th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan138 | |
| Accuracy of jigging dowel pins for the SS. valve tappet guide location. | 12th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan139 | |
| Flexibility of trunnion bearings for SS universal joints. | 12th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan140 | |
| Carburetion and cold-starting tests on an SS chassis. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan141 | |
| Comparison between two oil filter designs, LeC. 2667 and LeC. 2668, with a recommendation for the latter. | 2nd Dec 1929 | West Wittering \ T \ January1929-February1929 Scan142 | |
| Design of an SS instrument board, including gauge samples and dial colour alternatives. | 12th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan143 | |
| New scheme for servo lubrication and a related lever geometry adjustment. | 14th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan144 | |
| Suggestions for a reserve petrol supply device within the Autovac tank. | 14th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan145 | |
| Coordinating Mr. Elliott's visit to Le Canadel, a 10,000-mile test car, and finishing the engine mounting and exhaust. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan146 | |
| Effect of braking on oil movement and suggestions for modifying the filter and diaphragms. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan147 | |
| Responding to a telegram with suggestions for an SS clutch design, referencing scheme 2831 and bearings from Hoffmann and Skefco. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan148 | |
| Design and specifications for a centralised chassis lubrication dashboard pump. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan149 | |
| Discussion of pump performance issues and proposed modifications to address imperfect filling. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan150 | |
| Design improvements for hydraulic shock dampers, including a diagram of a spring mechanism. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan151 | |
| Requesting oil pressure figures for the SS model during a cold start. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan152 | |
| Secret memo discussing seven possible design schemes for a left-hand SS engine, focusing on camshaft and component interchangeability. | 15th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan153 | |
| Various engine design schemes, weighing factors like size, weight, and parts interchangeability. | 16th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan154 | |
| Secret document detailing a promising four-point 'India IV' engine mounting scheme with a diagram. | 16th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan155 | |
| Recommending Scheme 6 over Scheme 1 for Left Hand Engines, detailing issues with the latter's design. | 16th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan156 | |
| Design suggestions for a valve cover, focusing on noise reduction, sealing, and materials. | 16th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan157 | |
| Approval notes for trunk fixing, petrol tank support, and a large petrol filter on an SS.CHASSIS. | 22th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan158 | |
| Modifications to SS headlamp brackets for stiffness and commenting on the practicality of stays. | 18th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan159 | |
| Various designs for spanners to be used on internal hexagon plugs. | 19th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan160 | |
| Technical memorandum discussing the design of an SS oil filter and strainer in the sump, with suggested improvements. | 19th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan161 | |
| Design proposals for an oil sump and strainer to manage oil flow back. | 19th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan162 | |
| Proposed modifications and lubrication for a serrated universal joint and clutch shaft. | 19th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan163 | |
| Modifications to the design of SS & India spare wheel carriers. | 19th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan164 | |
| Design and construction of exhaust pipes and silencers, including a sketch. | 19th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan165 | |
| The painting process for wings on an open touring body, specifically regarding colour matching Rover Brown cellulose paint. | 19th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan166 | |
| Design, operation, and fixing of a valve in a water circulation system. | 20th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan167 | |
| Suggested method for supplying oil to a hypoid pinion thrust bearing in a rear axle. | 20th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan168 | |
| Suggestions for the arrangement of a left-hand SS hand brake compensator. | 21th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan169 | |
| Revisions to framed instruments, including the K.S. gauge, shutter controls, and a change in frame material. | 2nd Feb 1929 | West Wittering \ T \ January1929-February1929 Scan170 | |
| Proposal for a new starter motor system using a double reduction gear mechanism. | 21th Jan 1929 | West Wittering \ T \ January1929-February1929 Scan171 | |
| Diagram of a spring-loaded starter pinion engaging with a flywheel gear. | 12th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan172 | |
| Modification to a single petrol tank filter. | 12th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan173 | |
| Design and lubrication of a starter motor dashpot, including motor brushes and teeth engagement. | 22th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan174 | |
| Starter motor engagement, pinion design, and spring mechanisms. | 22th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan175 | |
| Three functional checks for a device and urging for improvements to ensure its reliability. | 22th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan176 | |
| Simplified method for chassis engine mounting using links or a flexible strap. | 22th Feb 1929 | West Wittering \ T \ January1929-February1929 Scan177 | |
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