| Description | Date | Identifier | |
| Modifications to the steering column control switch and steering worm connections. | 1st Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan88 | |
| Drawing LeC. 1912 for the Goshawk III four-speed side change gearbox. | 27th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan89 | |
| Particulars of the Goshawk III four-speed gearbox casing and declutching gear, referencing drawing No. LeC. 1913. | 27th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan90 | |
| Problem of boiling water in the 40/50 model's cooling system at various engine speeds and conditions. | 8th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan91 | |
| Secret memo regarding N.scheme 1838, a new, stiffer and higher design for step irons. | 21th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan93 | |
| Secret memo detailing modifications to a spare wheel carrier for the 40/50 model to overcome experienced difficulties. | 1st Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan94 | |
| Secret memo regarding the production of a mock-up bonnet, radiator, and dash to be fitted to an existing car. | 19th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan95 | |
| The testing of Discol Fuel for 40/50 car engines. | 1st Aug 1934 | West Wittering \ L \ 2July1924-September1924 Scan96 | |
| Agreeing to fit all 20.HP back axles with 11-tooth pinions to prevent sluggishness. | 18th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan98 | |
| Secret memo regarding N. scheme 1832, detailing the driving seat position and modifications to the scuttle. | 1st Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan99 | |
| Modifications to gearbox sliders for chassis LeC. 1909. | 1st Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan100 | |
| The requirement for a larger hole in the crankcase for the ignition governor. | 1st Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan101 | |
| Secret memo detailing alterations to the side lever mechanism due to a narrowed dash. | 15th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan102 | |
| The design and assembly of locating plungers for a simplified striking mechanism. | 1st Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan103 | |
| Secret memorandum regarding a simplified striking mechanism. | 15th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan104 | |
| Scuttle isolation schemes for the 20.HP and 25/30 chassis models. | 14th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan109 | |
| Sending a chassis print for a 'D' steering long chassis and requesting prints for a short chassis sports model. | 14th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan110 | |
| Scheme 1830 for a parallel control system, including specifications for radius rods and front springs. | 12th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan111 | |
| The experimental landaulet GF.68, detailing body rattle issues and suggesting improvements. | 9th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan112 | |
| Secret memorandum regarding the proposed ignition governor and advance curve for the EAC engine. | 1st Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan113 | |
| Secret memorandum investigating the cause of a bursting radiator on a 40/50 car. | 1st Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan114 | |
| Replacement of the carburetter control with a radiator shutter control on the dashboard. | 8th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan116 | |
| Secret memorandum detailing proposed dimensions for the bonnet, radiator, and dash for model E.A.C. 2, referencing scheme 1828. | 7th Aug 1924 | West Wittering \ L \ 2July1924-September1924 Scan117 | |
| Performance comparison test report between 'Discol' and 'Petrol' fuels on chassis 49DB. | 25th Jul 1924 | West Wittering \ L \ 2July1924-September1924 Scan120 | |
| Alterations to engine controls for the addition of a throttle governor. | 30th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan2 | |
| New steering pivot design for the Goshawk model in conjunction with 4-wheel brakes. | 27th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan3 | |
| Decision to stiffen the Goshawk III frame with tie-rods instead of increasing its depth. | 27th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan4 | |
| Decision to use hand control over thermostat control for radiator louvres on 20.HP and 40/50 cars. | 27th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan5 | |
| Proposing modifications to the E.A.C. engine's ignition system and switching arrangement. | 25th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan9 | |
| Despatching a damaged starter motor and bendix from a Goshawk 11 car and arranging for a replacement. | 25th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan10 | |
| From DA to HS asking for details on the performance and assembly of a Hispano front axle. | 25th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan11 | |
| Removal and replacement of a faulty starter motor on a Goshawk 11 car. | 24th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan13 | |
| Proposed modification to an adopted brake scheme by removing the trip from the countershaft. | 24th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan14 | |
| Requesting a drawing and feedback on standardizing frame ties for the Goshawk 11 frame. | 21th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan16 | |
| Modifications to 20.HP chassis prints for tool box fitment. | 21th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan17 | |
| Modification to the 40/50 chassis shock absorbers regarding clearance for a wing stay. | 21th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan18 | |
| Simplification of the servo lever mechanism by solidifying the countershaft. | 1st Jun 1924 | West Wittering \ L \ April1924-June1924 Scan19 | |
| Secret memo regarding an oil catcher for the 4-wheel brake system. | 21th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan20 | |
| Request for an experimental report on a shorter change speed lever for the 40/50 model. | 21th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan21 | |
| Broken starter motor spring on car 5.G.11, arranging for repair and requesting a replacement. | 21th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan22 | |
| Secret memo discussing the design of dipping headlights for the E. A. C. 2 model, proposing a design based on the Goshawk. | 20th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan24 | |
| Issues and proposed modifications for the lubricator on the rear universal joint. | 20th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan25 | |
| Making Goshawk tie-rods standard and plans for testing a deeper frame. | 20th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan26 | |
| Secret internal memo discussing the centre of twisting of the axle for four-wheel brakes with a torsional friction damper. | 18th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan27 | |
| Scheme and detailing changes for a throttle governor. | 6th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan28 | |
| Urgent issue and a proposed new solution for the 20.HP. propeller shaft lubricator. | 6th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan29 | |
| Extract from a memo discussing electrical work, including ignition tests, a switchbox design, and magneto specifications. | 6th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan30 | |
| Valve lift curves with lower lift, referencing specific drawings and rocker geometry. | 1st Jun 1924 | West Wittering \ L \ April1924-June1924 Scan31 | |
| Design of dipping headlights, including feedback on a prototype and comparison to a competitor's design. | 4th Jun 1924 | West Wittering \ L \ April1924-June1924 Scan32 | |
| Secret memorandum regarding drawing Lec. 1878, detailing modifications to the EAC.2 crankcase. | 3rd Jun 1924 | West Wittering \ L \ April1924-June1924 Scan33 | |
| The weight of the crankcase and a proposal to investigate reducing its thickness. | 3rd Jun 1924 | West Wittering \ L \ April1924-June1924 Scan34 | |
| Secret memo outlining engine alterations for longer connecting rods and shorter pistons. | 1st Jun 1924 | West Wittering \ L \ April1924-June1924 Scan35 | |
| Testing of rubber shackles from America for the 40/50 car. | 3rd Jun 1924 | West Wittering \ L \ April1924-June1924 Scan36 | |
| Exhaust system design, including a silencer with more baffles and a cutout valve. | 1st May 1924 | West Wittering \ L \ April1924-June1924 Scan38 | |
| Secret memo regarding an experimental engine design with opposed sparking plugs and a heated induction pipe. | 30th May 1924 | West Wittering \ L \ April1924-June1924 Scan39 | |
| Noisy starter on a car used by Mr. Royce and an inquiry into the progress of suggested improvements. | 30th May 1924 | West Wittering \ L \ April1924-June1924 Scan40 | |
| Insulation properties and breakdown testing of Redmonite coils compared to bakelite and stabalite materials. | 29th May 1924 | West Wittering \ L \ April1924-June1924 Scan41 | |
| The development status and specifications for a four-wheel brake system. | 27th May 1924 | West Wittering \ L \ April1924-June1924 Scan42 | |
| Brake design improvements concerning Ferodo lining, drum weight, front axle twist, and artillery wheel hub compatibility. | 26th May 1924 | West Wittering \ L \ April1924-June1924 Scan43 | |
| Use of Sankey type steel artillery wheels for EAC and Goshawk models. | 26th May 1924 | West Wittering \ L \ April1924-June1924 Scan44 | |
| On manufacturing issues and proposed alterations for a servo motor's thrust washer and clamping nut. | 24th May 1934 | West Wittering \ L \ April1924-June1924 Scan45 | |
| Secret memo regarding the design, construction, and lighting efficiency testing for an instrument board on a 40/50 chassis. | 23th May 1924 | West Wittering \ L \ April1924-June1924 Scan46 | |
| Design changes to induction and exhaust pipes, including new drawings and joint types. | 23th May 1924 | West Wittering \ L \ April1924-June1924 Scan47 | |
| Experimentation with the brake linkage ratio between front and back wheels. | 22th May 1924 | West Wittering \ L \ April1924-June1924 Scan48 | |
| Fitting tiebars to a 20.HP Landaulet special body frame. | 22th May 1924 | West Wittering \ L \ April1924-June1924 Scan49 | |
| Confirmation of a wire message regarding a visit to Derby to discuss steering components. | 21th May 1924 | West Wittering \ L \ April1924-June1924 Scan50 | |
| Notes providing remaining information and corrections for the unfinished drawing of a Silent Starter Main Switch Unit. | 15th May 1924 | West Wittering \ L \ April1924-June1924 Scan52 | |
| Description of the construction of an electrical switch, detailing its winding, contacts, materials, and operation. | 15th May 1924 | West Wittering \ L \ April1924-June1924 Scan53 | |
| Design notes for various views of a main switch, detailing its components and assembly. | 15th May 1924 | West Wittering \ L \ April1924-June1924 Scan54 | |
| Description of views 8 to 11, detailing the components and assembly of a switch unit and non-inductive resistance. | 15th May 1924 | West Wittering \ L \ April1924-June1924 Scan55 | |
| Concluding page of a memorandum discussing the expense and potential alterations of making mouldings. | 14th May 1924 | West Wittering \ L \ April1924-June1924 Scan56 | |
| Trial of floating bushes for steering pivots and the preference for grease over oil for lubrication. | 14th May 1924 | West Wittering \ L \ April1924-June1924 Scan57 | |
| Deflection measurements and load calculations for the Goshawk II chassis frame. | 1st May 1924 | West Wittering \ L \ April1924-June1924 Scan58 | |
| Request for specific load testing on a chassis, simulating a 39 cwt car and focusing on body underframe suspension and horn deflections. | 11th Aug 1920 | West Wittering \ L \ April1924-June1924 Scan59 | |
| Design progress and justification for the silent, double-geared E.A.C. starter. | 24th May 1924 | West Wittering \ L \ April1924-June1924 Scan60 | |
| Secret memorandum detailing a new exhaust design for a 6-cylinder engine, split into two groups of three. | 12th May 1924 | West Wittering \ L \ April1924-June1924 Scan61 | |
| Recommending the adoption of the two-stage Enots Grease Gun for lubrication over heavy oil. | 5th May 1924 | West Wittering \ L \ April1924-June1924 Scan62 | |
| Secret memo on the finalisation of the E.A.C. servo braking system design. | 1st May 1924 | West Wittering \ L \ April1924-June1924 Scan63 | |
| Clutch stop mechanism, referencing drawing No. Lec. 1869 and a proposed spring. | 1st May 1924 | West Wittering \ L \ April1924-June1924 Scan64 | |
| Detonations, over-run vibrations, and clutch brake issues on the E.A.C. engine. | 1st May 1924 | West Wittering \ L \ April1924-June1924 Scan65 | |
| Design and modification of a brake servo linkage and balancer system. | 1st May 1924 | West Wittering \ L \ April1924-June1924 Scan66 | |
| Excessive chassis frame deflection on a 20 HP Landaulette and proposing the fitting of tie-bars. | 1st May 1924 | West Wittering \ L \ April1924-June1924 Scan67 | |
| New design for a pedal gap plate and its implications for driver comfort. | 7th May 1924 | West Wittering \ L \ April1924-June1924 Scan68 | |
| Design of brake pedals for use with a servo system, referencing scheme 1802. | 7th May 1924 | West Wittering \ L \ April1924-June1924 Scan69 | |
| RHM braking scheme, focusing on issues with the servo connecting rod and the necessity of a ratchet mechanism. | 3rd May 1924 | West Wittering \ L \ April1924-June1924 Scan70 | |
| Secret memo from DA to HS regarding Mr. Royce's decision not to proceed with a new manual braking lever design for the E.A.C. 3 cars. | 5th Feb 1924 | West Wittering \ L \ April1924-June1924 Scan71 | |
| 4-Goshawk-11 car, previously loaned to the Maharaja of Patiala. | 31th May 1924 | West Wittering \ L \ April1924-June1924 Scan72 | |
| Technical assessment and comparison of a 1922 Renault model X1018. | 29th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan73 | |
| Secret memo discussing a modification to a servo design concerning spring placement. | 29th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan74 | |
| Design proposal for a single ratchet after a servo scheme, including a diagram and performance calculations. | 24th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan75 | |
| Telegram regarding performance issues at slow speeds and instructions for testing a fine angle ratchet. | 24th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan76 | |
| Short memo about 'Over-Running Vibrations', awaiting information from Derby and suggestions from WW. | 16th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan77 | |
| Less costly and satisfactory design scheme for a 40/50 reverse pinion. | 14th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan78 | |
| Secret memo discussing suggested modifications and experiments for an agreed braking system. | 11th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan79 | |
| Secret memo discussing required leverage for a new brake operating system, referencing scheme 1783 and sending scheme 1787. | 11th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan80 | |
| Potential improvements and testing for an Actuator Magnet on a sequence starter. | 1st Apr 1924 | West Wittering \ L \ April1924-June1924 Scan81 | |
| Experiment to reduce the number of bolts on an E.A.C. front axle. | 5th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan82 | |
| Design considerations for a longitudinal steering tube, including springs and leather gaiters. | 5th Apr 1924 | West Wittering \ L \ April1924-June1924 Scan83 | |
| Material ('Bone grey fibre') and spring clearance for a slipper flywheel. | 3rd Apr 1924 | West Wittering \ L \ April1924-June1924 Scan84 | |
| Method of making a joint for the engine main oil pipe. | 1st Jan 1924 | West Wittering \ L \ Jan1924-March1924 Scan0 | |
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