| Description | Date | Identifier | |
| Noise issues and potential modifications to an exhaust system. | 10th Oct 1924 | West Wittering \ M \ October1924-December1924 Scan20 | |
| Secret memorandum discussing the design, illumination, and materials for an instrument board. | 23th Oct 1924 | West Wittering \ M \ October1924-December1924 Scan21 | |
| The correct positioning of the front number plate. | 23th Oct 1924 | West Wittering \ M \ October1924-December1924 Scan22 | |
| Secret memo discussing modifications to four-wheel brakes, specifically concerning balancer arm suspension links. | 24th Oct 1924 | West Wittering \ M \ October1924-December1924 Scan23 | |
| Experimental modifications to the Goshawk II foot brake leverage. | 25th Oct 1924 | West Wittering \ M \ October1924-December1924 Scan24 | |
| Secret memo regarding a proposed modification to axle control parts. | 27th Oct 1924 | West Wittering \ M \ October1924-December1924 Scan25 | |
| Approving modifications to the engine undershield and cross steering tube, including a sketch of the proposed changes. | 3rd Nov 1924 | West Wittering \ M \ October1924-December1924 Scan26 | |
| Secret memorandum detailing modifications to the throttle control gear, referencing drawing No. Lec. 1946. | 11th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan27 | |
| Confidential memo discussing the design and production viability of the 'V' series chassis compared to other options for an EAC model. | 1st Nov 1924 | West Wittering \ M \ October1924-December1924 Scan28 | |
| Page discussing the 'W' Series Chassis and EAC 2 specifications. | 3rd Oct 1924 | West Wittering \ M \ October1924-December1924 Scan29 | |
| Specifications for the E.A.C. chassis, detailing a 'Conversion Chassis' and an 'Improved V Chassis'. | 11th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan30 | |
| Repairs for a Beaton all-weather car and the preparation of a new cabriolet for Mr. Royce. | 18th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan31 | |
| Completion of sub-frame designs and arrangements with coachbuilders Barkers and Hoopers. | 18th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan32 | |
| Experiments on the GF-68 underframe to determine the cause of vibration and shuddering. | 11th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan33 | |
| From AJS regarding a new cushion drive design to eliminate a thump in the starter. | 20th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan34 | |
| Specifications and instructions for the production of body sub frames for the 40/50 model. | 22th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan35 | |
| Letter to coachbuilders James Young & Co. Ltd. detailing a list of repairs required for a 'Beaton All Weather' car. | 25th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan36 | |
| Request for a set of Goshawk hand control levers with a more durable 'Necol' finish. | 26th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan37 | |
| Manufacturing process for a bakelite moulded ignition wiring tube using a split die. | 27th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan38 | |
| Electricity supply to the Works, proposing an investigation into metering methods for motors with low power factors. | 29th Nov 1934 | West Wittering \ M \ October1924-December1924 Scan39 | |
| Discouraging the use of thick oil in gearboxes and back axles, citing handling difficulties in a cold Goshawk. | 1st Nov 1924 | West Wittering \ M \ October1924-December1924 Scan41 | |
| Redesigning an exhaust system on an EAC engine to allow for a sequence starter motor. | 29th Nov 1924 | West Wittering \ M \ October1924-December1924 Scan42 | |
| The replacement of Goshawk starter motor pinions. | 12th Mar 1924 | West Wittering \ M \ October1924-December1924 Scan43 | |
| List of modifications and improvements for various vehicle components including bushes, bearings, and drives. | 18th Dec 1934 | West Wittering \ M \ October1924-December1924 Scan44 | |
| Technical memorandum outlining required modifications for the Goshawk Gear-Box. | 12th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan45 | |
| Telegram from Royce to Hives about working clearance and ignition advance. | 21th Aug 1923 | West Wittering \ M \ October1924-December1924 Scan46 | |
| The completion and varnish hardening time for Mr. Royce's car at Messrs. Young & Co. | 5th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan47 | |
| Query on the possibility of removing the exhaust choke valve from the accelerator pedal linkage. | 1st Dec 1924 | West Wittering \ M \ October1924-December1924 Scan48 | |
| Design changes for 'V' Series exhaust pipes, including manifold, silencer, and thermometer placement. | 12th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan49 | |
| Faults with a Goshawk 2 car, specifically the starter motor and back axle. | 12th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan50 | |
| Secret memo regarding the conversion of chassis X.9664 to use a Lucas dynamo and switchbox. | 9th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan51 | |
| Issues and proposed modifications for stub axle pivots, particularly for models with front wheel brakes. | 10th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan52 | |
| Engine cooling challenges and radiator design for the 40/50 model. | 13th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan53 | |
| The dispatch of drawings for oil pump modifications and a wheelcase oil jet for EAC engines. | 12th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan54 | |
| Modifications to a 40/50 chassis body subframe, suggesting a wider dashboard and raised radiator. | 17th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan55 | |
| Correspondence and testing of Perfect Circle scraper rings from Messrs R. A. Rothermel Ltd. | 18th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan56 | |
| Revised design for the 20HP exhaust downtake support and sliding spherical joint. | 12th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan57 | |
| Drawings and design alternatives for the 'V' series exhaust fittings and rear silencer brackets. | 20th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan58 | |
| Steering wheel positions, driver seating, and potential vision obstruction issues across various car series. | 1st Dec 1924 | West Wittering \ M \ October1924-December1924 Scan59 | |
| Design progress of an 'Anti Groan Device' for various car models and the Goshawk 3 gearbox casing. | 22th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan60 | |
| Reported 'groans' on a standard chassis and the effectiveness of a fabric coupling. | 23th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan61 | |
| Unsuitability of the current A.T. speedometer due to its size and requesting a smaller trip model. | 29th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan62 | |
| From DA to HS requesting clarification on which design of 40/50 model spare wheel carrier is experiencing failures. | 29th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan63 | |
| Engine cooling issues, a new fan design, and the benefits of louvres over shutters on bonnets. | 1st Dec 1924 | West Wittering \ M \ October1924-December1924 Scan64 | |
| Solutions for water boiling in the 40/50 model, including a new fan design and bonnet ventilation. | 1st Dec 1924 | West Wittering \ M \ October1924-December1924 Scan65 | |
| Requesting information on the extent to which car silencers become choked and measures for cleaning them, with a view to future accessibility. | 31th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan66 | |
| 'V' series ignition advance control and relay advance oil specifications. | 31th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan67 | |
| Chosen ignition advance governor curve for the EAC engine. | 31th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan68 | |
| Secret memo regarding the oil relay ignition governor, suggesting a strainer be fitted. | 31th Dec 1924 | West Wittering \ M \ October1924-December1924 Scan69 | |
| Proposed new wheel carrier for the Phantom chassis, including a request to build experimental units. | 2nd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan0 | |
| Modification to engine side guards to prevent mud splashing and requesting tests for reverse airflow. | 2nd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan1 | |
| Secret memo from 'E.' concerning revisions to drawing Lec. 2078 for the Eagle XVI valve gear. | 2nd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan2 | |
| Design of the upper cylinder head for the Eagle XVI engine, referencing drawing Lec.2094. | 2nd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan3 | |
| Modification to under-guards using soft felt strips to fill space around the crankcase. | 2nd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan4 | |
| Modifications to the 40/50 'V' Series steering gear box to increase irreversibility. | 2nd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan5 | |
| Proposal for a test rig to measure the coefficient of friction in steering systems. | 3rd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan6 | |
| Motion and design alternatives for the 'V' series accelerator pedal. | 3rd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan7 | |
| Modifications to the EAC plate clutch, proposing the use of fabric with duralumin mountings to reduce inertia. | 3rd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan8 | |
| The advantages of using lower-priced tungsten points over platinum points, advocating for replacement rather than repair. | 3rd Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan9 | |
| Drawing for 'X' Series modifications to shutter and starting carburetter control. | 6th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan10 | |
| Modified telephone message outlining an urgent plan to modify the Eagle engine as a temporary rival to Curtis engines. | 7th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan11 | |
| New light type clutch plate for the EAC clutch, its construction, and dismantling considerations. | 9th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan12 | |
| Design modifications for Chassis 7.EX. | 9th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan13 | |
| Design considerations for an Autovac tank and a wheel carrier. | 12th Jul 1933 | West Wittering \ N \ 2July1925-September1925 Scan14 | |
| Modification to the gearbox change lever and gate mechanism. | 9th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan15 | |
| Requesting spring strength details for a damped spring drive pendulum lever. | 10th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan16 | |
| Requesting particulars on worm and trunnion efficiencies for steering tests. | 10th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan17 | |
| Requesting the detailed measurement and analysis of springs from an American car. | 13th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan18 | |
| Disapproved bonnet louvres, requesting drawings for modifications and details on Hispano louvres. | 14th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan19 | |
| Modifications to the 'X' Series radiator shutter control, instruments, and dashboard wiring. | 14th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan20 | |
| Clarifying a misunderstanding regarding the 'W' series radiator, bonnet, and dash design. | 15th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan21 | |
| 'W' series radiator design and a proposal for a new radiator with integral shutters. | 17th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan22 | |
| Design preferences for radiators, bonnets, shutters, and louvres. | 17th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan23 | |
| Instructions for manufacturing a worm and nut for the 'V' series steering system. | 17th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan24 | |
| Experimental fitting of a Marles steering gear to a New Phantom chassis. | 18th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan25 | |
| N.scheme 2033, which details a large diameter worm for an EAC steering trial. | 18th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan26 | |
| Fitting of a large diameter irreversible worm and damped pendulum lever to Mr. Royce's car. | 20th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan27 | |
| Instructions and positioning for the 'W' series vacuum tank and radiator. | 1st Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan28 | |
| Complaint about brake cover contamination and proposing an experimental solution. | 21th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan29 | |
| Oil leak from the front spring's rear anchorage on Mr. Royce's car and proposing a new design for testing. | 1st Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan30 | |
| Design and material choice for a cover for the 40/50 rear brakes. | 1st Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan31 | |
| Telegram regarding car LS=5/=LG 22725, instructing not to send it as another is available. | 23th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan32 | |
| Test run and performance review of a modified India chassis. | 24th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan33 | |
| Requesting further efficiency readings for steering nuts, including reversibility and data on Goshawk and other modern types. | 24th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan34 | |
| Requesting further information comparing an American spring to a Woodhead spring, considering manufacturing accuracy and heat treatment. | 24th Jul 1925 | West Wittering \ N \ 2July1925-September1925 Scan35 | |
| Modifications and criticisms of control ball joints to prevent loosening. | 8th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan36 | |
| Investigations into vacuum feed issues affecting petrol economy on 40/50 and 20HP models. | 1st Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan37 | |
| Drawing LeC. 2121, concerning modifications for the battery ignition tower and distributor housing. | 10th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan38 | |
| Scheme 2037 for a damped pendulum lever cover and its potential modifications. | 12th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan39 | |
| Sending of a drawing for the Eagle XVI crankshaft bearings and details. | 17th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan40 | |
| Proposing a modification to the New Phantom vacuum feed tank, with a diagram, to resolve sooted spark plugs by introducing an air-only autovac mechanism. | 1st Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan41 | |
| Drawing LeC. 2123 for the EAGLE XV1 engine, requesting a wooden model of the combustion space and a duralumin cylinder stud. | 18th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan42 | |
| Use of a horizontal hydraulic shock absorber to resolve high-speed steering wobbles. | 18th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan43 | |
| Carburetter's low speed needle taper and altered filter mesh, with a request for a replacement part. | 20th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan44 | |
| Reduction of servo power on the 20.HP model by altering the cam angle. | 20th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan45 | |
| 9.G.111 concerning a stiffened tube and its numbers compared to a previous report. | 20th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan46 | |
| Telegram received by telephone regarding Mr. Royce's interest in the effect of radiator rods on wobble. | 24th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan47 | |
| Fault and proposed design improvements for an EAC carburetter filter. | 25th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan48 | |
| Alterations to the 20HP slipper flywheel to prevent the breakage of spring bolts. | 24th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan49 | |
| Water ingress issues with a new locking device for the Goshawk front axle and Dunlop wheels. | 24th Aug 1925 | West Wittering \ N \ 2July1925-September1925 Scan50 | |
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