| Description | Date | Identifier | |
| Wiring diagram for a chassis electrical system incorporating two-rate charge switching. | 4th Dec 1930 | Box 57 \ 1 Scan049 | |
| Electrical load and charging requirements for a two-rate dynamo battery system. | 19th Dec 1930 | Box 57 \ 1 Scan050 | |
| Dynamo charging schemes, switchbox modifications, and the conclusion that a higher capacity dynamo is needed. | 19th Dec 1930 | Box 57 \ 1 Scan051 | |
| Performance of a dynamo-battery system, generator cut-in speeds, and the use of compound versus shunt windings. | 9th Dec 1930 | Box 57 \ 1 Scan052 | |
| Performance and switching proposals for a dynamo battery system. | 23th Dec 1930 | Box 57 \ 1 Scan053 | |
| Cross-reference note for further information relating to the 20/25 electrical system. | 31th Dec 1930 | Box 57 \ 1 Scan054 | |
| Specifications and optional features of the GOSHAWK III model. | 26th Sep 1924 | Box 57 \ 1 Scan055 | |
| Proposed and future improvements for the Goshawk 11.a and Goshawk III models. | 25th Nov 1924 | Box 57 \ 1 Scan056 | |
| Production status of items under the Goshawk II.A. heading. | 26th Nov 1924 | Box 57 \ 1 Scan057 | |
| Improvements for the Goshawk 4 model, covering the 4-speed gearbox, front wheel brakes, frame, and a strengthened crankshaft and engine modifications to achieve 60 HP. | 12th Aug 1924 | Box 57 \ 1 Scan058 | |
| Modifications and test feedback for the Goshawk 4-speed gearbox. | 10th Dec 1924 | Box 57 \ 1 Scan059 | |
| Private memorandum discussing plans for an EAC 'V' series car and proposed modifications for a 20 HP model. | 12th Dec 1924 | Box 57 \ 1 Scan060 | |
| Best car for use at WW until the front wheel brakes are completed. | 13th Dec 1924 | Box 57 \ 1 Scan061 | |
| Design adjustments and improvements for the 4-Speed Side Change Servo Drive Goshawk Gearbox. | 12th Mar 1924 | Box 57 \ 1 Scan062 | |
| Continued list of proposed modifications for various mechanical components. | 12th Mar 1924 | Box 57 \ 1 Scan063 | |
| Description of a mechanism to prevent foreign matter wedging between a shaft and sleeve. | 1st Jan 1925 | Box 57 \ 1 Scan064 | |
| Need for secrecy regarding improved modifications for the 20 HP model. | 1st Jan 1925 | Box 57 \ 1 Scan065 | |
| Secrecy protocols for an urgent government order concerning the 'Seagull' project. | 2nd Feb 1923 | Box 57 \ 1 Scan066 | |
| Internal memorandum prohibiting officials from disclosing information beyond current specifications. | 17th Nov 1924 | Box 57 \ 1 Scan067 | |
| Testing requirements for the Goshawk 3 three-speed gearbox with servo. | 1st Jul 1925 | Box 57 \ 1 Scan068 | |
| Secret memo outlining the production programme for 280 20HP chassis, detailing gearbox types and build rates. | 1st Jan 1925 | Box 57 \ 1 Scan069 | |
| Two alternative arrangements for the servo on a Goshawk three-speed gearbox. | 10th Jan 1924 | Box 57 \ 1 Scan070 | |
| Secret memo establishing the codename 'USA' for the 20 HP car with a four-speed gearbox and outlining secrecy protocols. | 17th Jan 1925 | Box 57 \ 1 Scan071 | |
| The gear box ratios for the Goshawk II and Goshawk III engines. | 12th Feb 1925 | Box 57 \ 1 Scan072 | |
| The chassis gear ratios for the Goshawk II & III models. | 12th Feb 1925 | Box 57 \ 1 Scan073 | |
| Internal memorandum discussing chassis and gearbox modifications for four-wheel brakes, and production schedule adjustments for the U.S.A. and 'V' Series models. | 22th Jan 1925 | Box 57 \ 1 Scan074 | |
| Secret memo from CJ to Wor. regarding disappointment over delays in designs for a lengthened frame, front springs, and a chassis suitable for front wheel brakes. | 22th Jan 1925 | Box 57 \ 1 Scan075 | |
| Secret memorandum on production policy for the 20 HP car, focusing on issues with the four-speed gearbox and front-wheel brakes. | 1st Jan 1925 | Box 57 \ 1 Scan076 | |
| Secret internal memo from 'CJ' quoting a letter from Mr. Royce about prioritizing the Goshawk project. | 26th Jan 1925 | Box 57 \ 1 Scan077 | |
| Conference minutes, production continuity, and experimental gearbox development. | 26th Jan 1925 | Box 57 \ 1 Scan078 | |
| Minutes of a conference discussing gearbox design alterations and experimental plans for different gearbox models. | 26th Jan 1925 | Box 57 \ 1 Scan079 | |
| Chassis production strategy, particularly concerning USA models and the introduction of front wheel brakes. | 27th Jan 1925 | Box 57 \ 1 Scan080 | |
| Secret memorandum arguing against using 'USA' as a camouflage name due to potential negative sales and design implications. | 1st Jan 1925 | Box 57 \ 1 Scan081 | |
| Changing the code word for the 20 HP model to 'INDIA'. | 4th Feb 1925 | Box 57 \ 1 Scan082 | |
| Parts list for the 20-HP India model, detailing components like the gearbox, drive, and brake mechanisms. | 28th Feb 1925 | Box 57 \ 1 Scan083 | |
| Experimental work sheet detailing issued schemes and drawings for various vehicle components. | 28th Feb 1925 | Box 57 \ 1 Scan084 | |
| Instructions for building three more experimental chassis fitted with Four Wheel Brakes, detailing the required modifications. | 25th Feb 1925 | Box 57 \ 1 Scan085 | |
| Outlining urgent instructions for the 'India' chassis, including producing experimental models and issuing new part lists. | 25th Feb 1925 | Box 57 \ 1 Scan086 | |
| The production requirements and timeline for three special 'India' experimental cars. | 25th Feb 1925 | Box 57 \ 1 Scan087 | |
| Secret memo discussing the preparation of two types of experimental 'India' cars for 10,000-mile tests, focusing on front wheel brakes. | 27th Feb 1925 | Box 57 \ 1 Scan088 | |
| Suitability of the 'India' project for Front Wheel Brakes (F.W.B.). | 2nd Mar 1925 | Box 57 \ 1 Scan089 | |
| Secret memo questioning the timeline for a 10,000-mile trial of the 'India' chassis with and without front-wheel brakes. | 2nd Feb 1925 | Box 57 \ 1 Scan090 | |
| Secret memo regarding the preparation and testing of two types of experimental 'India' cars with and without front wheel brakes. | 27th Feb 1925 | Box 57 \ 1 Scan091 | |
| Secret internal memo from 'Wor' to 'Hs' arranging a meeting to discuss an attached statement. | 4th Mar 1925 | Box 57 \ 1 Scan092 | |
| From CJ to Wor. regarding a draft statement on the 'India' chassis, requesting feedback and collaboration. | 3rd Mar 1925 | Box 57 \ 1 Scan093 | |
| Outlining the sales and stock position for the 20 HP model. | 3rd Mar 1925 | Box 57 \ 1 Scan094 | |
| Typed memorandum outlining the sales strategy for chassis orders with or without Four-Wheel Brakes (FWB). | 1st Mar 1925 | Box 57 \ 1 Scan095 | |
| Policy document discussing the timing of an announcement for a new chassis with Four-Wheel Brakes (FWB). | 1st May 1925 | Box 57 \ 1 Scan096 | |
| Policy discussion on whether to deliver chassis with or without Four-Wheel Brakes (FWB). | 1st Mar 1925 | Box 57 \ 1 Scan097 | |
| Chassis delivery timelines and considerations for fitting Four-Wheel Brakes (FWB). | 3rd Mar 1925 | Box 57 \ 1 Scan098 | |
| Logistics, costs, and opinions on fitting Four Wheel Brakes (FWB) to chassis. | 1st Mar 1925 | Box 57 \ 1 Scan099 | |
| From CJ to WOR regarding the delivery schedule and fitting of Front Wheel Brakes (FWB) on the 'India' chassis. | 3rd Mar 1925 | Box 57 \ 1 Scan100 | |
| Secret internal memo regarding a conference and an enclosed suggestion for an issue concerning India. | 1st Mar 1925 | Box 57 \ 1 Scan101 | |
| Secret memo discussing the strategy for introducing the 'India' chassis and managing the transition from the current 20HP model. | 5th Mar 1925 | Box 57 \ 1 Scan102 | |
| Policy, testing, and costs associated with fitting Four-Wheel Brakes (F.W.B.) to the 'India' chassis. | 5th Mar 1925 | Box 57 \ 1 Scan103 | |
| Strategy for introducing the 'India' chassis for the 20HP model, considering the implementation of Front Wheel Brakes. | 5th Mar 1925 | Box 57 \ 1 Scan104 | |
| Strategy for testing and delivering the 'India' chassis with F.W.B. (Front Wheel Brakes). | 5th Mar 1925 | Box 57 \ 1 Scan105 | |
| Policy memo discussing the logistics and costs of fitting Four Wheel Brakes (F.W.B.) to 'India' chassis. | 1st Mar 1925 | Box 57 \ 1 Scan106 | |
| From CJ to Wor. regarding the 'India' Chassis, enclosing three related memos for discussion at a future lunch meeting. | 1st Mar 1925 | Box 57 \ 1 Scan107 | |
| Secret internal memorandum regarding the production and sales position of the 20 HP model. | 5th Mar 1925 | Box 57 \ 1 Scan108 | |
| Secret internal memorandum discussing the timing of an announcement for F.W.B. dependent on the sale of remaining chassis. | 1st Mar 1925 | Box 57 \ 1 Scan109 | |
| Summary of invoicing possibilities for the current year, comparing against the previous year's total. | 1st Mar 1925 | Box 57 \ 1 Scan110 | |
| Policy memo regarding the delivery specification of the 'India S' model, recommending initial production without FWB. | 1st Mar 1925 | Box 57 \ 1 Scan111 | |
| Secret memo outlining suggestions for the 'India' chassis trials, delivery schedules, and the fitting of F.W.B. (Four Wheel Brakes). | 5th Mar 1925 | Box 57 \ 1 Scan112 | |
| Page of suggestions regarding the preparation and delivery of 'India' chassis to London. | 6th Mar 1925 | Box 57 \ 1 Scan113 | |
| Delivery schedule and fitting of Four Wheel Brakes (FWB) to 'India' chassis. | 6th Mar 1925 | Box 57 \ 1 Scan114 | |
| Authorisation sheet to introduce a change to the 'India' model's speedometer driving gear. | 18th Mar 1925 | Box 57 \ 1 Scan115 | |
| Concerning the preparation of an EAC 'V' series car with a Hooper open touring body. | 18th Apr 1925 | Box 57 \ 1 Scan116 | |
| Secret memo discussing the disguised transport of a prototype car, 'India', for inspection by sales officials. | 4th May 1925 | Box 57 \ 1 Scan117 | |
| Secret memo arranging a demonstration of the 'India' car with 4-wheel brakes. | 5th May 1925 | Box 57 \ 1 Scan118 | |
| Four requested chassis improvements for future car work. | 15th Apr 1925 | Box 57 \ 1 Scan119 | |
| Secret memo concerning the 'INDIA' 20 HP car, complete with 4-wheel brakes, and its proposed arrival. | 2nd May 1925 | Box 57 \ 1 Scan120 | |
| Concerning the production of 'India' type cars, specifically comparing models with and without 4-wheel brakes. | 1st May 1925 | Box 57 \ 1 Scan121 | |
| Testing the brakes and steering on a car with 4-wheel brakes. | 4th May 1925 | Box 57 \ 1 Scan122 | |
| The development of gearboxes with torsionally free pinions and testing a deeper plunger. | 5th May 1925 | Box 57 \ 1 Scan123 | |
| Points requiring attention on the 'G' Series Goshawk with Front Wheel Brakes. | 5th May 1925 | Box 57 \ 1 Scan124 | |
| Secret memo discussing arrangements to prevent new 'India' cars being recognised during road testing. | 9th May 1925 | Box 57 \ 1 Scan125 | |
| List of advantages for the parallel control of axles on the 45-HP 'X' series chassis, to make it more like the 20 HP model. | 9th May 1925 | Box 57 \ 1 Scan126 | |
| Vehicle specifications, including a note on track width suitability for colonial work. | 12th May 1925 | Box 57 \ 1 Scan127 | |
| The status of a 20 HP car sent for a 10,000 miles trial in France. | 12th May 1925 | Box 57 \ 1 Scan128 | |
| Preparations for a 10,000-mile test on an 'India' car with front wheel brakes. | 12th May 1925 | Box 57 \ 1 Scan129 | |
| Issues with steering instability, rapid servo worm wheel wear, and braking faults. | 12th May 1925 | Box 57 \ 1 Scan130 | |
| Secret memo on the essential production of lightened front brake toggle shafts for 'India' cars. | 12th May 1925 | Box 57 \ 1 Scan131 | |
| Secret memo from Hs. to CJ. regarding a delay in the 'India' car with 4-wheel brakes being ready to leave for France. | 13th May 1925 | Box 57 \ 1 Scan132 | |
| Secret memo discussing the concealed fitting of 4-wheel brakes to a 20 HP car for the Indian market. | 15th May 1925 | Box 57 \ 1 Scan133 | |
| Confirmation of a telegram regarding a deflection percentage and a future meeting. | 16th May 1925 | Box 57 \ 1 Scan134 | |
| Secret memo proposing a visit to W.W. with an improved 'India' car. | 19th May 1925 | Box 57 \ 1 Scan135 | |
| Required improvements for the 20 HP chassis, focusing on engine roughness and exhaust vibration. | 19th May 1925 | Box 57 \ 1 Scan136 | |
| Engine roughness and exhaust vibrations in the 20 HP chassis. | 21th May 1925 | Box 57 \ 1 Scan137 | |
| Preparing the 'INDIA' car with F.W.B. for tests in France. | 21th May 1925 | Box 57 \ 1 Scan138 | |
| Confirmation of wire regarding a body modification for a Barker subframe and requesting the chassis. | 25th May 1925 | Box 57 \ 1 Scan139 | |
| Comparing braking units and servo torque multiplication between different vehicle models. | 27th May 1925 | Box 57 \ 1 Scan140 | |
| Servo efficiency and brake distribution, including test data and a correction. | 27th May 1925 | Box 57 \ 1 Scan141 | |
| The efficiency, multiplication, and distribution of servo-assisted braking systems. | 27th May 1925 | Box 57 \ 1 Scan142 | |
| Braking system calculations, correcting assumptions about the relationship between car weight and pedal pressure. | 27th May 1925 | Box 57 \ 1 Scan143 | |
| The front wheel brakes for the 'India' model, discussing servo efficiency. | 27th May 1925 | Box 57 \ 1 Scan144 | |
| Altering brake leverage, distribution, and pedal pressure. | 27th May 1925 | Box 57 \ 1 Scan145 | |
| Requesting testing on a 20 HP 4-speed gearbox for oil leaks and investigation into a stiffening gear lever. | 5th Jun 1925 | Box 57 \ 1 Scan146 | |
| Secret memo regarding modifications to the 'INDIA' PLUS F.W.B. model concerning springs, servo leverage, and front wheel brakes. | 10th Jun 1925 | Box 57 \ 1 Scan147 | |
| Particulars of a spring and discussing stress improvements. | 10th Jun 1925 | Box 57 \ 1 Scan148 | |
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