| Description | Date | Identifier | |
| Progress chart tracking the status of vehicle components through different departments. | 21th Mar 1923 | Box 72 \ 4 scan0021 | |
| Status report for 'P' Department components, tracking their progress through various stages. | 5th May 1923 | Box 72 \ 4 scan0022 | |
| Progress and design specifications for various engine components, including the crankcase, cylinder blocks, and fan drive. | 5th May 1923 | Box 72 \ 4 scan0023 | |
| Meeting with 'R' at Le Canadel, the position of the E.A.C., and instructions for a car. | 2nd May 1923 | Box 72 \ 4 scan0024 | |
| Secret memo updating on the progress of the new E. A. C. Shop building, equipment installation, and personnel. | 5th May 1923 | Box 72 \ 4 scan0025 | |
| Secret internal memorandum regarding the location and labelling of armour plating. | 10th May 1923 | Box 72 \ 4 scan0026 | |
| Internal memorandum from BJ to Hs inquiring about the dispatch date of a case addressed to Lillie Hall that has not arrived. | 24th May 1923 | Box 72 \ 4 scan0027 | |
| Enquiry into the delayed dispatch of a case of E.A.C. parts to Lillie Hall. | 25th May 1923 | Box 72 \ 4 scan0028 | |
| Secret memo regarding a telephone call to Lillie Hall about the despatch of a case. | 31th May 1923 | Box 72 \ 4 scan0029 | |
| The unsealed arrival of a case marked 'SECRET. E.A.C.' and a handwritten response investigating the matter. | 2nd Jul 1923 | Box 72 \ 4 scan0030 | |
| Secret memo concerning the sealing of a case of E.A.C. parts using hoop-iron bands. | 4th Jul 1923 | Box 72 \ 4 scan0031 | |
| Clarifying the sealed condition of two exchanged boxes. | 6th Jul 1923 | Box 72 \ 4 scan0032 | |
| List of personnel engaged on E.A.C. work in a specific shop, divided into day and night shifts. | 4th Sep 1923 | Box 72 \ 4 scan0033 | |
| Secret memo detailing three types of experimental chassis (EAC.I, II, and III) and their proposed modifications. | 20th Sep 1923 | Box 72 \ 4 scan0034 | |
| Modification to a component, adding an additional inch between the pads. | 20th Sep 1923 | Box 72 \ 4 scan0035 | |
| Engine performance tests, including power curves, vibration, and tappet adjustments. | 29th Sep 1923 | Box 72 \ 4 scan0036 | |
| The examination of an E.A.C. Engine, detailing points requiring attention. | 1st Oct 1923 | Box 72 \ 4 scan0037 | |
| Technical report detailing adjustments and issues with engine components including valves, gears, and cams. | 1st Oct 1923 | Box 72 \ 4 scan0038 | |
| Suggested and completed modifications to engine components including guides, tappet rollers, clutch, and joints. | 10th Oct 1923 | Box 72 \ 4 scan0039 | |
| Suggesting engine tests with a larger carburettor and modifications to the exhaust/inlets before fitting to a chassis. | 3rd Oct 1923 | Box 72 \ 4 scan0040 | |
| The E.A.C. engine detailing findings after dismantling. | 16th Oct 1923 | Box 72 \ 4 scan0041 | |
| Engine issues including tappet guides, a water pump drive, and torsional vibrations. | 12th Jul 1923 | Box 72 \ 4 scan0042 | |
| Vibration issue and horsepower curve data. | 4th Oct 1923 | Box 72 \ 4 scan0043 | |
| Sticking tappets on an E. A. C. engine and the necessary modifications. | 1st Oct 1923 | Box 72 \ 4 scan0044 | |
| Secret memorandum detailing the construction and disguise of a test vehicle body to avoid identification during trials. | 10th Oct 1923 | Box 72 \ 4 scan0045 | |
| Secret memorandum detailing the procedures for fitting and road-testing a new E.A.C.1 engine. | 10th Oct 1923 | Box 72 \ 4 scan0046 | |
| Secret memo detailing modifications to the EAC gearbox, engine support, and valve tappets. | 13th Oct 1923 | Box 72 \ 4 scan0047 | |
| Modification to E.A.C. engine tappets to resolve a sticking issue and an attached horsepower comparison for various carburetters. | 3rd Oct 1923 | Box 72 \ 4 scan0048 | |
| Design schemes sent for ignition wiring, torque reaction dampers, and a modified wheel case. | 13th Oct 1923 | Box 72 \ 4 scan0049 | |
| Secret memo discussing the design for accessibility of the E.A.C. and Goshawk engines. | 17th Oct 1923 | Box 72 \ 4 scan0050 | |
| Secret memorandum detailing proposed design changes to a vehicle's back axle, gearbox, and engine. | 7th Oct 1923 | Box 72 \ 4 scan0051 | |
| Policy memo discussing modifications and new parts required for the 40/50 chassis, focusing on front wheel brakes and engine options. | 19th Oct 1923 | Box 72 \ 4 scan0052 | |
| Feasibility of modifying a standard 40/50 chassis into various experimental models. | 19th Oct 1923 | Box 72 \ 4 scan0053 | |
| Secret memo detailing three proposed modifications for the E.A.C. 1V project. | 23th Oct 1923 | Box 72 \ 4 scan0054 | |
| Overhaul of an E.A.C. engine, listing completed jobs and component conditions. | 24th Oct 1923 | Box 72 \ 4 scan0055 | |
| The specifications of different E.A.C. chassis types for the 40/50 car. | 24th Oct 1923 | Box 72 \ 4 scan0056 | |
| The E.A. C.1 engine, detailing camshaft comparisons and fuel distribution issues at the hot-spot. | 29th Oct 1923 | Box 72 \ 4 scan0057 | |
| Graph of power output and consumption for an E.A.C. engine with a Knave carburetter, comparing 110° and 118° camshafts. | 27th Oct 1923 | Box 72 \ 4 scan0058 | |
| The investigation of the EAC.1. Engine. | 14th Nov 1923 | Box 72 \ 4 scan0059 | |
| Comparing the thermal efficiencies and heat distribution of an EAC.1 engine and a standard 40/50 engine. | 14th Nov 1923 | Box 72 \ 4 scan0060 | |
| Heat distribution and thermal efficiency test data for an EAC.1 engine with a standard induction system and Knave carburetter. | 14th Nov 1923 | Box 72 \ 4 scan0061 | |
| Tabulated heat distribution data, expressed as a percentage of heat supplied for two different engine tests. | 14th Nov 1923 | Box 72 \ 4 scan0062 | |
| Comparison of efficiencies for the 40/50 HP RR and EAC.1 models, including valve timing data. | 16th Nov 1923 | Box 72 \ 4 scan0063 | |
| E.A.C-1 engine investigations concerning the boiler and hot-spot draining scheme during cold starts. | 16th Nov 1923 | Box 72 \ 4 scan0064 | |
| The E.A.C-1 induction system and hot-spot experiments. | 12th Jul 1923 | Box 72 \ 4 scan0065 | |
| Engine distribution and the performance of the standard E.A.C. hot-spot. | 12th Jul 1923 | Box 72 \ 4 scan0066 | |
| Comparing the performance of different engine hot-spot types and materials based on petrol precipitation. | 12th Jul 1923 | Box 72 \ 4 scan0067 | |
| Summarising tests on the efficiency of an aluminium hot spot compared to cast iron. | 16th Nov 1923 | Box 72 \ 4 scan0068 | |
| From 'R.' outlining imperative conditions and arguments against the design of a 4-speed gearbox. | 23th Nov 1923 | Box 72 \ 4 scan0069 | |
| Arguments for a 3-speed gearbox over a 4-speed gearbox for car models. | 26th Nov 1923 | Box 72 \ 4 scan0070 | |
| Tests conducted on an E.A.C-1 engine, detailing valve stretching and recommendations for rebuild. | 26th Nov 1923 | Box 72 \ 4 scan0071 | |
| The failure of umbrella valves on the E. A. C-1 engine. | 26th Nov 1923 | Box 72 \ 4 scan0072 | |
| Inadequate heat flow path and torsional failure of E.A.C. valve springs. | 26th Nov 1923 | Box 72 \ 4 scan0073 | |
| Bump tests conducted on a 40/50 chassis with 4-wheel brakes. | 26th Nov 1923 | Box 72 \ 4 scan0074 | |
| 40/50 HP vehicle bump test detailing component failures over time. | 26th Nov 1923 | Box 72 \ 4 scan0075 | |
| Failures of a front spring, buffer spring, and steering pendulum arm during testing. | 26th Nov 1923 | Box 72 \ 4 scan0076 | |
| Standardization of parts for the 40/50 chassis, referencing car EAC.11 and a 10,000-mile test run in France. | 28th Nov 1923 | Box 72 \ 4 scan0077 | |
| Unsatisfactory dynamo components and potential modifications, including adopting a belt drive. | 28th Nov 1923 | Box 72 \ 4 scan0078 | |
| The accessibility of lubricators for various components on model E.A.C.-111. | 30th Nov 1923 | Box 72 \ 4 scan0079 | |
| Outlining design modifications for proposals E.A.C.11 and E.A.C.111, affecting material orders and component design. | 13th Dec 1923 | Box 72 \ 4 scan0080 | |
| Modifications to the E.A.C.11 chassis, including a new engine, starter, gearbox, and brakes. | 13th Dec 1923 | Box 72 \ 4 scan0081 | |
| Cover letter enclosing a rough draft of notes for an upcoming meeting and requesting feedback. | 14th Dec 1923 | Box 72 \ 4 scan0082 | |
| Production and testing programme for 1924, including chassis trials, delivery schedules, and material supply issues. | 20th Dec 1923 | Box 72 \ 4 scan0083 | |
| Performance and limitations of 4-wheel brakes and the EAC-1 engine. | 20th Dec 1923 | Box 72 \ 4 scan0084 | |
| Testing of 4-wheel brakes, Hispano brakes, and the EAC-1 engine. | 31th Dec 1923 | Box 72 \ 4 scan0085 | |
| Secret memo from CJ to Hs regarding potential issues with a new engine and plans to test a chassis in France. | 31th Dec 1923 | Box 72 \ 4 scan0086 | |
| Failures in steering gear, front springs, and frame brackets, comparing different designs. | 4th Jan 1924 | Box 72 \ 4 scan0087 | |
| From CJ to Hs expressing frustration over the lack of response and the slow pace of the Experimental Department. | 11th Jan 1924 | Box 72 \ 4 scan0088 | |
| Initial road test performance and faults of the experimental EAC-1 engine. | 10th Jan 1924 | Box 72 \ 4 scan0089 | |
| Listing engine faults and discussing the experimental department's procedures and past failures. | 10th Jan 1924 | Box 72 \ 4 scan0090 | |
| Defense of the author's critical approach towards experimental work, arguing it aids progress. | 8th Jan 1924 | Box 72 \ 4 scan0091 | |
| Meeting notes from the design committee regarding the EAC.3 chassis, specifically steering lock and front springs. | 8th Jan 1924 | Box 72 \ 4 scan0092 | |
| Discussions on 4-wheel brakes, 20 HP frame length, side lever gearbox, and patents. | 1st Jan 1924 | Box 72 \ 4 scan0093 | |
| The testing of the E.A.C. engine and its preparation for installation into 40/50 HP cars. | 1st Jan 1924 | Box 72 \ 4 scan0094 | |
| Engine issues including detonations, magneto noise, and valve spring breakages, with proposed solutions. | 1st Jan 1924 | Box 72 \ 4 scan0095 | |
| Secret internal memo detailing progress at West Wittering (WW) and clarifying EAC nomenclature for various chassis configurations. | 16th Jan 1924 | Box 72 \ 4 scan0096 | |
| Internal report detailing the status of various EAC models, gearboxes, and chassis designs. | 16th Jan 1924 | Box 72 \ 4 scan0097 | |
| Steering and front spring breakages, with proposed solutions and test suggestions. | 16th Jan 1924 | Box 72 \ 4 scan0098 | |
| Car performance, driving conditions, and technical issues like detonations and valve springs. | 18th Jan 1924 | Box 72 \ 4 scan0099 | |
| Brake servo adjustments, pedal pressure, and the effect of unequal braking on steering. | 19th Jan 1924 | Box 72 \ 4 scan0100 | |
| The testing and performance of the 3rd E.A.C. engine, including modifications and fuel detonation analysis. | 19th Jan 1924 | Box 72 \ 4 scan0101 | |
| Ignition timing settings and the requirement for automatic advance on the EAC model. | 19th Jan 1924 | Box 72 \ 4 scan0102 | |
| Secret memorandum outlining strict procedures for handling bonnet keys for cars with a new engine to prevent financial loss. | 21th Jan 1924 | Box 72 \ 4 scan0103 | |
| Recommendations to modify the flywheel inspection cover and add a drain hole for the E.A.C-1 engine. | 1st Jan 1924 | Box 72 \ 4 scan0104 | |
| Clarifying development priorities for a new 4-speed gearbox and a large reduction servo for the four-wheel brakes. | 22th Jan 1924 | Box 72 \ 4 scan0105 | |
| Secret internal memorandum discussing the allocation of production resources between projects EAC.IV and EAC.II. | 1st Jan 1924 | Box 72 \ 4 scan0106 | |
| Secret memorandum detailing the progress and design status of the EAC.4 gearbox and related components. | 25th Jan 1924 | Box 72 \ 4 scan0107 | |
| Allocation of design and engineering work for the EAC and EAC.1V projects, specifically relating to the engine, electricals, brakes, and chassis. | 27th Jan 1924 | Box 72 \ 4 scan0108 | |
| Letter discussing views on slow speed servo brakes and other braking systems. | 27th Jan 1924 | Box 72 \ 4 scan0109 | |
| Secret memo discussing the features and production priority of chassis models EAC.1 to EAC.5. | 28th Jan 1924 | Box 72 \ 4 scan0110 | |
| From CJ to Wor. discussing the delivery date for trials cars. | 1st Jan 1924 | Box 72 \ 4 scan0111 | |
| Letter from CJ to R discussing brake issues, gearbox production, and chassis delivery timelines for a show at Olympia. | 28th Jan 1924 | Box 72 \ 4 scan0112 | |
| Secret memo from 'Wor.' forwarding a memo from 'CJ.' to 'L.' and 'Hs.' for their opinion and a possible meeting. | 29th Jan 1924 | Box 72 \ 4 scan0113 | |
| Cover note for a summary of general notes regarding production engines EAC.1, 2, 4 and 5. | 6th Feb 1924 | Box 72 \ 4 scan0114 | |
| Technical notes and decision points for various chassis and engine components for EAC models 1, 2, 4 and 5. | 2nd Feb 1924 | Box 72 \ 4 scan0115 | |
| Engineering query and decision log regarding various chassis components. | 31th Oct 1923 | Box 72 \ 4 scan0116 | |
| Technical query and decision list regarding various chassis components. | 26th Apr 1917 | Box 72 \ 4 scan0117 | |
| List of queries and decisions to be made regarding various chassis components and fittings. | 26th Apr 1917 | Box 72 \ 4 scan0118 | |
| List of required design decisions and comments for various chassis components. | 1st Feb 1924 | Box 72 \ 4 scan0119 | |
| Confidential memo regarding sending a draughtsman to Le Canadel and the potential delay to EAC.3 and EAC.1V chassis designs. | 1st Feb 1924 | Box 72 \ 4 scan0120 | |
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