| Description | Date | Identifier | |
| Recommendation to standardise the winding for an actuator box and to arrange for the necessary drawings to be prepared. | 23th Dec 1919 | West Wittering \ D \ December1919 Scan33 | |
| The successful use of cast iron pistons and sending a sample to West Wittering. | 12th Dec 1919 | West Wittering \ D \ December1919 Scan34 | |
| Testing and failures of rear shock absorbers, specifically issues with bolts stretching and levers working loose. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan0 | |
| Continuation page of a memorandum discussing split springs and friction. | 2nd Feb 1920 | West Wittering \ D \ February1920 Scan1 | |
| Investigation into the protection of the Lucas E.575 dynamo and battery by using fuses in the dynamo circuits. | 4th Feb 1938 | West Wittering \ D \ February1920 Scan2 | |
| Investigation into minimum fusing currents and the testing of a new distribution board with a Lucas switchbox. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan3 | |
| Investigation into dynamo control and negative circuit fuse capacities under various running conditions. | 1st Dec 1923 | West Wittering \ D \ February1920 Scan4 | |
| Technical note on the behavior and protection of the dynamo with different fuse configurations. | 2nd Feb 1926 | West Wittering \ D \ February1920 Scan5 | |
| Investigation into dynamo protection and fuse behavior under different temperature conditions. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan6 | |
| Continued discussion on the effectiveness and capacity of fuses in main negative, control, and field circuits. | 2nd Feb 1920 | West Wittering \ D \ February1920 Scan7 | |
| Wiring diagram with annotations and explanatory text regarding the circuit's fuse functionality. | 3rd Feb 1920 | West Wittering \ D \ February1920 Scan8 | |
| Analysis of fuse configurations for electrical circuit protection, including a diagram for a four-contact switch. | 3rd Feb 1920 | West Wittering \ D \ February1920 Scan9 | |
| Continuation page of a report discussing dynamo disadvantages and various fuse protection configurations. | 2nd Feb 1920 | West Wittering \ D \ February1920 Scan10 | |
| Table of current measurements and calculations for a Lucas E.575 Dynamo. | 7th Feb 1920 | West Wittering \ D \ February1920 Scan11 | |
| Examination and testing of a new distribution board, with recommendations for improvement. | 7th Feb 1920 | West Wittering \ D \ February1920 Scan12 | |
| The design and safety of the electrical fuse system, with suggestions for improvements. | 7th Feb 1920 | West Wittering \ D \ February1920 Scan13 | |
| Modifications to the 20 HP valve gear arrangement based on drawing LeC.1201. | 11th Feb 1920 | West Wittering \ D \ February1920 Scan15 | |
| The testing and modification of two types of motor-car heaters, one American and one English. | 12th Feb 1920 | West Wittering \ D \ February1920 Scan18 | |
| Comparison and analysis of the 'Thermorad' and 'Perfection' car heaters, detailing disadvantages and design features. | 2nd Feb 1920 | West Wittering \ D \ February1920 Scan19 | |
| Comparison and conclusion on 'Thermorad' and 'Perfection' exhaust heaters, with suggestions for design improvements. | 12th Feb 1920 | West Wittering \ D \ February1920 Scan20 | |
| Incorporating a heater system valve into the exhaust, noting explosions in the silencer. | 2nd Feb 1920 | West Wittering \ D \ February1920 Scan21 | |
| Difficulties encountered when fitting new type rear shock absorbers and proposing solutions. | 24th Feb 1920 | West Wittering \ D \ February1920 Scan23 | |
| Satisfactory fixing of a shock absorber lever following a design modification. | 24th Feb 1920 | West Wittering \ D \ February1920 Scan24 | |
| Visit with the Hawk-Northcliffe chassis, potential changes to the 20 HP back axle, and the decision to proceed with a twelve-cylinder engine. | 4th Feb 1920 | West Wittering \ D \ February1920 Scan25 | |
| Excessive duty on shock dampers and proposing a new serrated fixing for the lever. | 4th Feb 1920 | West Wittering \ D \ February1920 Scan27 | |
| On unsatisfactory thermometers and routing crankchamber fumes for the 40/50 HP chassis. | 5th Mar 1920 | West Wittering \ D \ February1920 Scan28 | |
| Requesting a modification to the water temperature regulator on the 40/50 HP chassis to aid in draining. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan29 | |
| Proposal to experiment with venting engine breather gas directly to the open air via a pipe through the undershield. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan30 | |
| Specifications and dynamometer test results for the Owen Magnetic Car. | 6th Feb 1920 | West Wittering \ D \ February1920 Scan31 | |
| Report page detailing dynamometer test results comparing electrical and mechanical spur gear reduction systems. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan32 | |
| Road test report on a car with a magnetic clutch and electrical control, detailing performance and issues. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan33 | |
| Road test report page detailing the advantages and disadvantages of a car's performance, focusing on the electrical system and drive. | 6th Aug 1920 | West Wittering \ D \ February1920 Scan34 | |
| Impracticality and poor fuel consumption of a car, questioning whether to keep or replace it. | 6th Feb 1920 | West Wittering \ D \ February1920 Scan35 | |
| Poor efficiency of the Owen-Magnetic car, recommending its disposal. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan36 | |
| Poor efficiency of the Owen Magnetic car and recommending its prompt disposal. | 26th Apr 1917 | West Wittering \ D \ February1920 Scan37 | |
| Confirming the sending of drawing LeC.1200 for the 20 HP starter motor switch. | 11th Feb 1928 | West Wittering \ D \ February1920 Scan38 | |
| Altering the steering box and shaft for the 40/50 HP chassis, proposing a continuous shaft design. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan39 | |
| Requested modifications to a car's distribution board, focusing on fuses, insulation, and component layout. | 3rd Feb 1920 | West Wittering \ D \ February1920 Scan40 | |
| Protection offered by fuses, fuse wire size, and requesting a modified sample distribution board. | 9th Feb 1920 | West Wittering \ D \ February1920 Scan41 | |
| Issues with gauze in petrol strainers, suggesting the sulphur content in benzol is the likely cause. | 11th Feb 1920 | West Wittering \ D \ February1920 Scan42 | |
| From 'R.' proposing a scheme for the brake differential countershafts on the 20 HP chassis. | 12th Aug 1922 | West Wittering \ D \ February1920 Scan43 | |
| Serious issue with dynamo connections and awaiting a resolution from Lucas. | 12th Feb 1920 | West Wittering \ D \ February1920 Scan44 | |
| Instruction from Mr. Royce to change the bevel gear ratio for the 'Vulture' rear axle to 4.75 to 1. | 19th Feb 1920 | West Wittering \ D \ February1920 Scan45 | |
| Drawing Lec.1203 for the Goshawk water outlet pipe and radiator anchorage. | 16th Feb 1920 | West Wittering \ D \ February1920 Scan46 | |
| Water suction pipe and bonnet side rests for the 'Goshawk' engine. | 16th Feb 1928 | West Wittering \ D \ February1920 Scan47 | |
| Advantages of a new 3.5 to 1 back axle ratio and urging its standardization. | 19th Feb 1920 | West Wittering \ D \ February1920 Scan48 | |
| Recommendation to replace solid eyes with rolled eyes for the rear road springs on the 40/50 HP chassis. | 2nd Feb 1926 | West Wittering \ D \ February1920 Scan50 | |
| Instructions from Mr. Royce regarding the design and lubrication of the shock damper for the 40/50 HP chassis. | 1st Feb 1920 | West Wittering \ D \ February1920 Scan51 | |
| Request for a progress report on the two electrical machines for the 20 HP dynamo and motor. | 10th Feb 1920 | West Wittering \ D \ February1920 Scan52 | |
| Design discussion on split aluminium pistons for the 40/50 HP chassis, focusing on cone shape and ring placement. | 20th Feb 1920 | West Wittering \ D \ February1920 Scan53 | |
| Starting motor support for the 'Goshawk' engine, referencing drawing LeC.1145. | 24th Feb 1920 | West Wittering \ D \ February1920 Scan54 | |
| Relaying Mr. Royce's approval of a piston design from drawing N.359, with a requested alteration to the longitudinal saw-cut. | 24th Feb 1920 | West Wittering \ D \ February1920 Scan55 | |
| The steering position and pedal mechanism for the 'Buzzard' and 'Vulture' models. | 24th Feb 1930 | West Wittering \ D \ February1920 Scan56 | |
| Request to experiment on the minimum revolutions for the Goshawk engine magneto. | 26th Feb 1920 | West Wittering \ D \ February1920 Scan57 | |
| Instructions for timing the 'Goshawk' engine, referencing drawing Lec.1124 and necessary modifications. | 27th Feb 1930 | West Wittering \ D \ February1920 Scan58 | |
| 'Condor' engine's reliability and performance for the International Motor-Boat Race. | 1st May 1920 | West Wittering \ D \ February1920 Scan59 | |
| Engine reliability, revs, and compression, with a request for suggestions on figures to offer. | 2nd Feb 1920 | West Wittering \ D \ February1920 Scan60 | |
| List of new parts fitted to a car for a 10,000-mile run, with corresponding remarks. | 1st Jan 1920 | West Wittering \ D \ January1920 Scan0 | |
| Continued list of new parts fitted, including part numbers, descriptions, and remarks for changes. | 16th Apr 1919 | West Wittering \ D \ January1920 Scan1 | |
| Continuation page listing newly fitted parts with their corresponding part numbers and remarks. | 1st Jan 1920 | West Wittering \ D \ January1920 Scan1.1 | |
| Mr. Royce's approval and further modifications for the 3/19 gear box drawing. | 6th Jan 1920 | West Wittering \ D \ January1920 Scan2 | |
| Confirmation of a telegram regarding pistons for a ten thousand mile trial. | 5th Jan 1919 | West Wittering \ D \ January1920 Scan3 | |
| Two schemes related to the gearbox: brake/gear control levers and a front supporting bracket. | 1st Jan 1920 | West Wittering \ D \ January1920 Scan4 | |
| Letter providing drawing No. LeC.1183 with final particulars of the gear box arms. | 7th Jan 1920 | West Wittering \ D \ January1920 Scan5 | |
| Faults and modifications for the Sylphon water temperature regulator unit for the 40/50 H+P chassis. | 7th Jan 1920 | West Wittering \ D \ January1920 Scan6 | |
| Cover note for re-assembling instructions for the 3/19 gear box. | 13th Jan 1920 | West Wittering \ D \ January1920 Scan7 | |
| Design and manufacturing advantages of a diagonal web scraper piston with a spring skirt. | 4th Dec 1929 | West Wittering \ D \ January1920 Scan8 | |
| Providing final drawings and adjustment information for a starter on an American chassis. | 19th Jan 1920 | West Wittering \ D \ January1920 Scan9 | |
| Simplified oil pressure regulating valve for the Goshawk engine. | 20th Jan 1920 | West Wittering \ D \ January1920 Scan10 | |
| Effect of temperature on dynamo regulation systems, comparing the trembler and third brush methods. | 20th Jan 1920 | West Wittering \ D \ January1920 Scan11 | |
| Potential sound effect of Michelin wheels on the back axle and proposing further tests. | 23th Jan 1930 | West Wittering \ D \ January1920 Scan14 | |
| Dynamo cutting-in speeds, electrical loads, and performance issues. | 26th Jan 1920 | West Wittering \ D \ January1920 Scan16 | |
| Dynamo performance, potential modifications, and a recent failure. | 1st Jan 1920 | West Wittering \ D \ January1920 Scan17 | |
| Letter discussing the ineffectiveness of a ballast resistor as a fuse replacement in a constant current dynamo's field circuit. | 1st Jan 1920 | West Wittering \ D \ January1920 Scan18 | |
| Desaxé Crossley piston design and its potential to cause seizing. | 1st Jan 1920 | West Wittering \ D \ January1920 Scan19 | |
| Evaluating American-made pressure gauges for use on American chassis, comparing them to existing Salter gauges. | 27th Jan 1920 | West Wittering \ D \ January1920 Scan21 | |
| Discussion about designing a suitable petrol gauge for a rear fuel tank, abandoning one design and proposing alternatives for consideration. | 28th Jan 1920 | West Wittering \ D \ January1920 Scan23 | |
| Hand-drawn diagram of a petrol level measuring device. | 2nd Jul 1920 | West Wittering \ D \ January1920 Scan24 | |
| List of modifications and improvements made to a brush holder for a 40/50 HP starter motor. | 31th Jan 1920 | West Wittering \ D \ January1920 Scan25 | |
| Design of a luggage carrier, comparing the viability of drop forgings versus sheet metal pressings. | 24th Jan 1920 | West Wittering \ D \ January1920 Scan26 | |
| Design suggestions for a highly stressed hinge, sheet metal brackets, and a luggage grid. | 28th Jan 1920 | West Wittering \ D \ January1920 Scan27 | |
| Modifications for petrol tanks, luggage carriers, fillers, and gauge fittings. | 1st Jan 1920 | West Wittering \ D \ January1920 Scan28 | |
| Modifications to the carburettor and fuel tank filter for American cars, referencing the 'Condor' design. | 1st Jan 1920 | West Wittering \ D \ January1920 Scan29 | |
| The starter gear for the Goshawk chassis, referencing drawing No. LeC.1192. | 2nd Feb 1920 | West Wittering \ D \ January1920 Scan30 | |
| The Goshawk engine's water inlet pipes and connections, referencing drawing No. 1196. | 2nd Feb 1920 | West Wittering \ D \ January1920 Scan31 | |
| Telegram regarding Condor rod modifications and a subsequent bearing failure after testing. | 8th Jan 1920 | West Wittering \ D \ January1920 Scan32 | |
| Petrol and air leak in a new type of rear shock absorber, recommending a design alteration. | 19th Jan 1920 | West Wittering \ D \ January1920 Scan34 | |
| Experiments investigating spark length in a chassis battery ignition system at various speeds. | 20th Jan 1920 | West Wittering \ D \ January1920 Scan35 | |
| Calculated figures for the current in a contact breaker coil at various speeds. | 20th Jan 1920 | West Wittering \ D \ January1920 Scan36 | |
| The loss of spark length in a chassis battery ignition system due to a second variable gap. | 5th Jan 1920 | West Wittering \ D \ January1920 Scan37 | |
| Test results on the effect of contact breaker speed on spark length. | 21th Sep 1918 | West Wittering \ D \ January1920 Scan38 | |
| Starter motor failure caused by grease working its way onto the commutator. | 20th Jan 1920 | West Wittering \ D \ January1920 Scan41 | |
| Experiment testing the use of ballast resistance in place of a fuse in constant current generators. | 21th Jan 1920 | West Wittering \ D \ January1920 Scan42 | |
| Continued report on dynamo performance, discussing the effects of adding ballast resistance to the field current. | 21th Jan 1920 | West Wittering \ D \ January1920 Scan43 | |
| Sending drawing Lec.1209 for the 'Buzzard' crankshaft and requesting an order for rough turned cranks. | 1st Mar 1920 | West Wittering \ D \ March1920 Scan0 | |
| Drawing Lec.1213 for the 'Buzzard' crankshaft, detailing new methods for plugging holes and dealing with oil caps. | 3rd Mar 1920 | West Wittering \ D \ March1920 Scan1 | |
| Request for the creation of one-eighth scale models of 'Vulture' and 'Buzzard' bonnets and chassis for comparative purposes. | 4th Mar 1920 | West Wittering \ D \ March1920 Scan2 | |
| From E. to D.A. requesting further dimensions for the Pattern Shop. | 2nd Feb 1920 | West Wittering \ D \ March1920 Scan3 | |
| Listing various parts received from Mr. Olley for inspection and testing. | 8th Mar 1920 | West Wittering \ D \ March1920 Scan4 | |
| List of parts received from Mr. Olley for inspection and test. | 8th Mar 1940 | West Wittering \ D \ March1920 Scan5 | |
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