| Description | Date | Identifier | |
| Design and performance issues of petrol pumps, comparing different models. | 31th Oct 1931 | Box 179 \ 1 img060 | |
| Modified water connection between the pump and cylinder block for the J.3. engine. | 31th Oct 1931 | Box 179 \ 1 img061 | |
| Colour of instrument dials for a 25HP Special Touring Saloon, specifically requesting Venetian cream instead of black. | 2nd Nov 1931 | Box 179 \ 1 img062 | |
| Machining and balancing of crankshaft weights, with a reference to a Chrysler scheme. | 2nd Nov 1931 | Box 179 \ 1 img063 | |
| Request for a newly discovered electrical petrol gauge for testing and potential replacement of the Hobson gauge. | 3rd Nov 1931 | Box 179 \ 1 img064 | |
| Proposals for improving the lubrication of the reverse shaft on the 25HP synchromesh gearbox. | 3rd Nov 1931 | Box 179 \ 1 img065 | |
| Bearing tests for a synchromesh gearbox and assumptions made about shaft hardening and bearing loads. | 14th Nov 1931 | Box 179 \ 1 img066 | |
| Technical memo detailing modifications to the Japan P. engine and radiator suspension system. | 25th Nov 1931 | Box 179 \ 1 img067 | |
| Mathematical comparison and specification for a J.3 propeller shaft, referencing 20HP and 25HP models. | 11th Nov 1931 | Box 179 \ 1 img068 | |
| Propeller shaft clearances, axle rebound, and crossmember modifications for the 25HP model. | 1st Mar 1934 | Box 179 \ 1 img069 | |
| Telephone conversation regarding the design and production status of 20/25 HP exhaust manifolds. | 6th Nov 1931 | Box 179 \ 1 img070 | |
| Proposed foolproof aero engine cylinder design with integral jackets and a detachable head. | 6th Nov 1931 | Box 179 \ 1 img071 | |
| Blueprint L.e.C. 2567 concerning the J.Z. fan drive, exhaust pipe, and water connections. | 27th Nov 1931 | Box 179 \ 1 img072 | |
| Reminder to measure pedal pressure on the latest 20/25 clutch and provide particulars. | 27th Nov 1931 | Box 179 \ 1 img073 | |
| The J.3 Exhaust Manifold design and blueprint LeC. 2570. | 7th Nov 1931 | Box 179 \ 1 img074 | |
| Progress report on the design and development work for the J.3 engine. | 7th Nov 1931 | Box 179 \ 1 img075 | |
| Simpler reverse gear scheme for the P. 2. gearbox. | 7th Nov 1931 | Box 179 \ 1 img076 | |
| Design and material choices for brake drums, comparing wrought steel, cast iron, and other combinations. | 9th Nov 1931 | Box 179 \ 1 img077 | |
| Departing from the common S.U. pattern carburetter towards a new single semi-expanding design. | 9th Nov 1931 | Box 179 \ 1 img078 | |
| Merits and drawbacks of using electrical petrol pumps over mechanical alternatives. | 9th Nov 1931 | Box 179 \ 1 img079 | |
| Car design work, focusing on the petrol gauge, ignition coil, and exhaust pipes. | 10th Nov 1931 | Box 179 \ 1 img080 | |
| Pump connections, engine support, and carburetter design for the J.3 & Peregrine models. | 10th Nov 1931 | Box 179 \ 1 img081 | |
| Issues with wooden finishers, headlamp options, and wing stays for a special touring saloon. | 10th Nov 1931 | Box 179 \ 1 img082 | |
| Modifications to rear dumb irons to provide bumper pads. | 10th Nov 1931 | Box 179 \ 1 img083 | |
| Modified front and rear dumb irons for P. 2. bumper fixings. | 10th Nov 1971 | Box 179 \ 1 img084 | |
| The clutch arrangement for J. 3, referencing scheme 3362. | 11th Nov 1971 | Box 179 \ 1 img085 | |
| Drawings for the J.3 Exhaust Manifold & Pipe, noting a modification to the joint. | 11th Nov 1931 | Box 179 \ 1 img086 | |
| Layout of scheme 3304, a Synchro Mesh Gearbox for the P.2 model. | 13th Nov 1931 | Box 179 \ 1 img087 | |
| Suggestion to adopt the 'Jackall' 4-wheel hydraulic jacking system due to the inadequacy of the current one. | 13th Nov 1931 | Box 179 \ 1 img088 | |
| Replacing the instrument board dipping switch with a foot-operated switch for the 20/25 model. | 13th Nov 1931 | Box 179 \ 1 img089 | |
| The introduction and positioning of Lucas headlamps on the 25HP model. | 13th Nov 1931 | Box 179 \ 1 img090 | |
| 2-stroke compression ignition engine seen at the Commercial Motor Transport Exhibition. | 14th Nov 1931 | Box 179 \ 1 img091 | |
| Trojan pistons, Junkers engine maintenance, and 4-stroke compression ignition engine principles. | 14th Nov 1931 | Box 179 \ 1 img092 | |
| Advance print for an expanding updaught single choke carburetter for the continental Phantom. | 14th Nov 1931 | Box 179 \ 1 img093 | |
| Purchase of competitor cars for analysis and comparing production costs and materials for the 'Peregrine' project. | 16th Nov 1923 | Box 179 \ 1 img094 | |
| Use of long toed cams and steel push rods to manage tappet clearance and noise. | 19th Nov 1931 | Box 179 \ 1 img095 | |
| 4-stroke compression ignition engines from the Commercial Motor Transport Exhibition. | 16th Nov 1931 | Box 179 \ 1 img096 | |
| Technical analysis of a Mercedes-Benz C.I. engine's balance weights and a comparison with a Daimler petrol engine's valve gear and cam design. | 19th Nov 1931 | Box 179 \ 1 img097 | |
| Carburettor configurations, comparing single versus double setups, and considering a new semi-expanding carburettor design. | 19th Nov 1931 | Box 179 \ 1 img098 | |
| N. scheme 3363 for the J. 3. clutch pit, revised clutch operating gear, and front brake differential. | 17th Nov 1931 | Box 179 \ 1 img099 | |
| The stiffening of a reverse shaft for a 25HP synchro-mesh gearbox. | 17th Nov 1931 | Box 179 \ 1 img100 | |
| Use of a 3-inch propeller shaft on the J. 3 model for an increased safety margin. | 18th Nov 1931 | Box 179 \ 1 img101 | |
| Addition of a cored hole in the crankcase wall to prevent oil accumulation in the camshaft chamber. | 18th Nov 1931 | Box 179 \ 1 img102 | |
| Bearing issues and proposed solutions for a synchro mesh gearbox. | 18th Nov 1931 | Box 179 \ 1 img103 | |
| Load on the spigot bearing in a 25HP Synchro Mesh Gearbox. | 18th Nov 1931 | Box 179 \ 1 img104 | |
| Experimental application of features from design J.3 to a 20/25HP clutch. | 18th Nov 1931 | Box 179 \ 1 img105 | |
| Scheme N. sch. 3248 for the J.3. Rear Shock Damper mounting. | 19th Nov 1931 | Box 179 \ 1 img106 | |
| Requesting prints and tracings for the 25HP Special Touring Saloon body. | 19th Nov 1931 | Box 179 \ 1 img107 | |
| Requesting a progress update on modifications to the epicyclic gearbox for car 27-EX. | 20th Nov 1931 | Box 179 \ 1 img108 | |
| Selection and preparation of a car for 'R.' for use in France. | 20th Nov 1931 | Box 179 \ 1 img109 | |
| Brake system developments for public service vehicles from the Commercial Motor Transport Exhibition. | 21th Nov 1931 | Box 179 \ 1 img110 | |
| The Dewandre braking system and the Dennis worm and nut steering box. | 21th Nov 1931 | Box 179 \ 1 img111 | |
| The transmission and springing systems of various bus and coach chassis. | 24th Nov 1931 | Box 179 \ 1 img112 | |
| Experiments to regulate oil flow for automatic clutch spigot lubrication. | 24th Nov 1931 | Box 179 \ 1 img113 | |
| Experimental adaptation of a reverse gear for the 20/25 Synchro Mesh Gearbox. | 24th Nov 1931 | Box 179 \ 1 img114 | |
| Weight and thickness of cast iron brake drums. | 24th Nov 1931 | Box 179 \ 1 img115 | |
| New schemes for pedal mountings and their modification to suit a new gearbox. | 11th Feb 1918 | Box 179 \ 1 img116 | |
| New type of expanding carburettor and its adaptation for the Phantom. | 24th Nov 1931 | Box 179 \ 1 img117 | |
| Challenges and future development directions for compression ignition engines. | 25th Nov 1931 | Box 179 \ 1 img118 | |
| Cover note for scheme 3378, detailing the actuating gear for a P.2 synchromesh gearbox. | 26th Nov 1931 | Box 179 \ 1 img119 | |
| Automatic system for extra cylinder lubrication. | 26th Nov 1931 | Box 179 \ 1 img120 | |
| Scheme 3375, which shows the striking mechanism for a 25HP Synchro Mesh Gearbox. | 26th Nov 1931 | Box 179 \ 1 img121 | |
| Design changes for the rear end of the 'Japan 3' model, including the petrol tank, luggage carrier, and exhaust. | 26th Nov 1931 | Box 179 \ 1 img122 | |
| Proposal for a new sports chassis, suggesting the Peregrine model and outlining its key features. | 28th Nov 1931 | Box 179 \ 1 img123 | |
| Selection of ammeters and self-winding clocks for cars, recommending against Lucas and in favour of Weston, Elliott, or Ferranti for ammeters and the Boyce type for clocks. | 28th Nov 1931 | Box 179 \ 1 img124 | |
| Improving the torsional stiffness of larger car frames by using the engine as a stiffening component. | 28th Nov 1931 | Box 179 \ 1 img125 | |
| Future dynamos, suggesting a move to a 2-stage vibrator type for better output and control. | 30th Nov 1931 | Box 179 \ 1 img126 | |
| Change in ignition coil design and a comparison of L.T. contact makers. | 30th Nov 1931 | Box 179 \ 1 img127 | |
| Various design options for compression ignition engines, including sleeve, double piston, and Junkers types. | 28th Nov 1931 | Box 179 \ 1 img128 | |
| Conversion mounting modification for the front shock damper. | 30th Nov 1931 | Box 179 \ 1 img129 | |
| Examination of a J.3 cylinder head casting and potential modifications. | 30th Nov 1931 | Box 179 \ 1 img130 | |
| Goshawk I engine and its suitability compared to other engine models for a speed programme. | 30th Nov 1931 | Box 179 \ 1 img131 | |
| Carburation options of a single versus dual carburetter setup for 6-cylinder engines. | 1st Dec 1931 | Box 179 \ 1 img132 | |
| Proposal regarding the design and implementation of longer, rivetless bonnets for the 25 HP model. | 26th Nov 1931 | Box 179 \ 1 img133 | |
| Confirmation of a meeting at Park Wards to resolve difficulties with car 20-G-4. | 28th Nov 1931 | Box 179 \ 1 img134 | |
| Modifications to the headlamps for the 20/25 chassis, including extra cabling and taller lamp brackets. | 28th Nov 1931 | Box 179 \ 1 img135 | |
| Use of P.80 lamps with taller brackets to alter the appearance of headlamps to match the 40/50 model. | 28th Nov 1931 | Box 179 \ 1 img136 | |
| Advocating for the expedited trial of a promising cylinder construction design, designated 'J. 3.'. | 30th Nov 1921 | Box 179 \ 1 img137 | |
| Request for forged solid flanges on drawn tubes, including a request for samples. | 30th Nov 1931 | Box 179 \ 1 img138 | |
| Solution for the diamond mounting of road wheel shock dampers. | 30th Nov 1931 | Box 179 \ 1 img139 | |
| Single versus double hole eccentric plug adjusters on twin carburetters. | 30th Nov 1931 | Box 179 \ 1 img140 | |
| Design layout and clearances for the rear end of car model J.3. | 30th Nov 1931 | Box 179 \ 1 img141 | |
| J.3. Brake Linkage, referencing a scheme and proposing slight modifications. | 4th Dec 1931 | Box 179 \ 1 img142 | |
| Lubrication schedule and drawing for a Synchro Mesh Gearbox. | 11th Dec 1931 | Box 179 \ 1 img143 | |
| Permanent lubrication scheme for the J.3 gearbox, comparing two modification proposals. | 1st Dec 1931 | Box 179 \ 1 img144 | |
| Improvements to the gas and inlet bends for the J.3. cylinder head. | 12th Dec 1931 | Box 179 \ 1 img145 | |
| Further development in the lubrication method for the reverse shaft on all synchro mesh gearboxes. | 22th Dec 1931 | Box 179 \ 1 img146 | |
| Proposed modifications to the bonnet length of the 25 HP model. | 3rd Dec 1931 | Box 179 \ 1 img147 | |
| Arrangements for collecting an unfinished and unregistered car body from Park Wards. | 3rd Dec 1931 | Box 179 \ 1 img148 | |
| Design and implementation of the 25HP battery box suspension. | 23th Dec 1931 | Box 179 \ 1 img149 | |
| Proposing a new 'B' Sports engine, drawing comparisons to Alfa Romeo and Peregrine engines. | 12th Dec 1931 | Box 179 \ 1 img150 | |
| Driving seat positions, steering columns, pedals, and levers for J.3. | 5th Dec 1931 | Box 179 \ 1 img151 | |
| Modifications to the side levers for the 25.HP Synchromesh Gearbox. | 5th Dec 1931 | Box 179 \ 1 img152 | |
| Sending the original drawing LeC. 2930, showing improvements to the exhaust and inlet gas bends of Japan 3. | 7th Dec 1931 | Box 179 \ 1 img153 | |
| Design of a compression ignition engine, including cylinder, piston, and injection methods. | 7th Dec 1931 | Box 179 \ 1 img154 | |
| The sending of N. scheme 33W general arrangement, requesting blueprints and confirmation on printing options. | 1st Dec 1931 | Box 179 \ 1 img155 | |
| P.2. Synchro Mesh Gearbox, including a modified top cover, servo damper placement, and a backing light switch. | 8th Dec 1931 | Box 179 \ 1 img156 | |
| Forwarding information about the controls and induction pipe for the P.2 Continental Expanding Carburettor. | 9th Dec 1931 | Box 179 \ 1 img157 | |
| Proposal for creating a luggage platform over the irregular floor and seat boards in vehicle 20-G-4. | 9th Dec 1931 | Box 179 \ 1 img158 | |
| Use of oil-less bushes for spring shackles on the Peregrine project. | 1st Dec 1931 | Box 179 \ 1 img159 | |
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