| Description | Date | Identifier | |
| Advice memo for the forwarding of one chassis from the Conduit Street location. | 7th Feb 1922 | Box 21 \ 5 Scan054 | |
| List of contents for a D.F.P. car tool kit. | 20th Feb 1922 | Box 21 \ 5 Scan055 | |
| Arrangements for sending for a D.F.P. car chassis. | 20th Feb 1922 | Box 21 \ 5 Scan056 | |
| To Mr. Hives confirming a chassis, fitted with a box body, is ready for collection at Lillie Hall. | 18th Feb 1922 | Box 21 \ 5 Scan057 | |
| Cancelling a trial run and arranging for a car to be sent to Derby for a seat to be fitted. | 14th Feb 1922 | Box 21 \ 5 Scan058 | |
| Telegram from Royce to Hives enquiring about the D7P chassis. | 14th Dec 1922 | Box 21 \ 5 Scan059 | |
| The purchase and transport of a D.F.P. chassis from Lillie Hall to Derby for a body to be fitted. | 16th Feb 1922 | Box 21 \ 5 Scan060 | |
| Acquisition and modification of a 10.HP. D.F.P. car for experimental coachwork. | 26th Jan 1922 | Box 21 \ 5 Scan061 | |
| Specifications of a D.F.P. car, a trial run arrangement, and requesting particulars of a 10.HP Peugeot chassis. | 18th Jan 1922 | Box 21 \ 5 Scan062 | |
| From Hs. proposing a visit to Mr. Royce with either a Marmon or Essex car being unloaded at Liverpool. | 15th Nov 1920 | Box 21 \ 6 Scan001 | |
| Retention, testing, and disposal of various American cars. | 23th Nov 1920 | Box 21 \ 6 Scan002 | |
| Arranging the trial of an 'Essex' car and requesting a written report for Mr. Royce. | 27th Nov 1920 | Box 21 \ 6 Scan003 | |
| Test drive report and critique of an Essex car's performance. | 29th Nov 1920 | Box 21 \ 6 Scan004 | |
| Road test report on a car's performance, noting its speed limitations and the positive qualities of its clutch. | 29th Nov 1920 | Box 21 \ 6 Scan005 | |
| Evaluation and testing of cars received from America, including the Marmon, Buick, Essex, and Dodge. | 11th Dec 1920 | Box 21 \ 6 Scan006 | |
| Performance data from the Ticknall Hill Test comparing Essex, Dodge, and Buick cars. | 22th Dec 1920 | Box 21 \ 6 Scan007 | |
| Four American cars for sale and a request for their cost price. | 14th Jan 1921 | Box 21 \ 6 Scan008 | |
| Mr. Royce's request to return a Marmon car to Derby and exchange it for an Essex car. | 14th Jan 1921 | Box 21 \ 6 Scan009 | |
| Requesting an order be sent to Messrs Sanderson to paint the damaged rear wings of an Essex Car before it is sent to Mr. Royce. | 18th Jan 1921 | Box 21 \ 6 Scan010 | |
| Technical specifications and performance test results for an Essex Car. | 19th Jan 1921 | Box 21 \ 6 Scan011 | |
| Specification sheet for an Essex Car detailing engine, suspension, ignition, and steering settings. | 30th Aug 1924 | Box 21 \ 6 Scan012 | |
| Continued list of technical specifications for an Essex vehicle, including a sketch of the brake lever. | 24th Jan 1921 | Box 21 \ 6 Scan013 | |
| Delivery note from Sanderson & Sons, Automobile Carriage Builders, for two wings from an Essex Car. | 24th Jan 1921 | Box 21 \ 6 Scan014 | |
| Request to obtain a three-month license for an Essex car, providing its technical particulars. | 25th Jan 1921 | Box 21 \ 6 Scan015 | |
| Sale and pricing of second-hand American cars. | 26th Jan 1921 | Box 21 \ 6 Scan016 | |
| The licence and registration details for an 'Essex' Car. | 28th Jan 1921 | Box 21 \ 6 Scan017 | |
| Notification about sending the licence plate for an Essex car, with the number plates to follow on Thursday. | 1st Feb 1921 | Box 21 \ 6 Scan018 | |
| Order for various C.A.V. lamp bulbs for Mr. Royce's Essex car. | 22th Feb 1921 | Box 21 \ 6 Scan019 | |
| Request for a box of spare lamps for an Essex car, detailing the required voltages and types. | 21th Feb 1921 | Box 21 \ 6 Scan020 | |
| The sending of lamp bulbs for an Essex car. | 8th Mar 1921 | Box 21 \ 6 Scan021 | |
| The despatch of lamp bulbs for an Essex car to Mr. Royce. | 12th Mar 1921 | Box 21 \ 6 Scan022 | |
| Forwarding lamp bulbs for an Essex car that were previously omitted. | 12th Mar 1921 | Box 21 \ 6 Scan023 | |
| Performance report and speedometer inaccuracy for an Essex car. | 15th Mar 1921 | Box 21 \ 6 Scan024 | |
| Urgent internal memo regarding the renewal of the licence for the 'Essex' car. | 16th Mar 1921 | Box 21 \ 6 Scan025 | |
| The licence renewal for an Essex car. | 17th Mar 1921 | Box 21 \ 6 Scan026 | |
| Returning unsuitable lamp bulbs for an 'Essex' car and requesting correct replacements. | 15th Mar 1921 | Box 21 \ 6 Scan027 | |
| Telegram chasing a renewed license for the 'Essex bar' and threatening to cancel arrangements. | 22th Mar 1921 | Box 21 \ 6 Scan028 | |
| Issues with lamp bulbs for the 'Essex' car and specifying correct replacements. | 31th Mar 1921 | Box 21 \ 6 Scan029 | |
| Notes from a visit regarding the design and testing of Goshawk and Essex carburetters. | 31th Mar 1921 | Box 21 \ 6 Scan030 | |
| Return of a license for an 'Essex' car and correcting the understated horsepower rating. | 4th Apr 1921 | Box 21 \ 6 Scan031 | |
| Clarifying the engine bore specification for an Essex Car for licensing purposes. | 6th Apr 1921 | Box 21 \ 6 Scan032 | |
| Despatch of lamp bulbs to Mr. Royce for an experimental Essex car. | 3rd May 1921 | Box 21 \ 6 Scan033 | |
| Despatch of six lamp bulbs for an Essex Car. | 3rd May 1921 | Box 21 \ 6 Scan034 | |
| Design and placement of a spare wheel carrier, comparing it to an American competitor's car. | 5th May 1921 | Box 21 \ 6 Scan035 | |
| Query regarding wheel clearance for various hood types on the Goshawk 11 model, with a note on wheel size. | 5th May 1921 | Box 21 \ 6 Scan036 | |
| The licence for an 'Essex' car. | 17th Jun 1921 | Box 21 \ 6 Scan037 | |
| Reminder memo to HS from E regarding the renewal of the 'Essex' car license. | 9th Sep 1921 | Box 21 \ 6 Scan038 | |
| Querying a quotation of 10 shillings and 6 pence for a new cylinder head gasket for an 'ESSEX' car. | 23th Sep 1921 | Box 21 \ 6 Scan039 | |
| Modifications to the Swallow engine due to detonation issues found in the Essex engine. | 24th Sep 1921 | Box 21 \ 6 Scan040 | |
| Ordering a cylinder head gasket and discussing engine detonation for an Essex car. | 26th Sep 1921 | Box 21 \ 6 Scan041 | |
| Request asking when Essex and Packard cars can be provided, stating they are needed at once. | 4th Oct 1921 | Box 21 \ 6 Scan042 | |
| Design and performance of a universal joint, comparing it to a Spicer joint. | 8th Oct 1921 | Box 21 \ 6 Scan043 | |
| Message regarding a visit to Derby for 50 armoured cars for the India Office, and a request for an Essex car to drive. | 13th Oct 1921 | Box 21 \ 6 Scan044 | |
| Engine starting difficulties in cold weather for two vehicles and requesting a replacement battery. | 15th Nov 1921 | Box 21 \ 6 Scan045 | |
| Comparison of battery versus magneto ignition for ease of starting a small pump engine. | 15th Nov 1921 | Box 21 \ 6 Scan046 | |
| Dynamometer test results for an Essex Car, showing horsepower and load at various engine revolutions. | 16th Jan 1922 | Box 21 \ 6 Scan047 | |
| The issuance of car licences for several vehicles. | 16th Jan 1922 | Box 21 \ 6 Scan048 | |
| Record of the total mileage of an Essex Car. | 9th Mar 1922 | Box 21 \ 6 Scan049 | |
| Status and expected disposal of an Essex car. | 9th Mar 1922 | Box 21 \ 6 Scan050 | |
| The expiration of car licenses and a request for renewal instructions. | 1st Mar 1922 | Box 21 \ 6 Scan051 | |
| Dispatch of an Essex carburetter and the registration of an Essex and a 20HP RR car. | 14th Mar 1922 | Box 21 \ 6 Scan052 | |
| Registration status of Marmon, Essex, and 26357 vehicles. | 14th Mar 1922 | Box 21 \ 6 Scan053 | |
| Telegram received by telephone requesting the return of a carburettor and a licence for a Delage. | 3rd Apr 1922 | Box 21 \ 6 Scan054 | |
| Proposal for a driver to exchange a D.F.P. from Derby for an Essex car. | 16th Mar 1922 | Box 21 \ 6 Scan055 | |
| Status and licensing of a D.F.P car, an Essex car, and a Delage car. | 16th Mar 1922 | Box 21 \ 6 Scan056 | |
| Inquiry about the particulars of an Essex car for sale at the Works. | 7th Mar 1922 | Box 21 \ 6 Scan057 | |
| The return of an Essex Carburetter to stores. | 14th Mar 1922 | Box 21 \ 6 Scan058 | |
| Telegram received by telephone concerning the return of a carburettor and a request for a vehicle licence. | 14th Mar 1922 | Box 21 \ 6 Scan059 | |
| Obsolete licenses for Marmon, Essex, and 26357 cars at West Wittering. | 3rd Mar 1922 | Box 21 \ 6 Scan060 | |
| Request to send red number plates 0021-CH by express post to Mr. Hancock at Mr. Royce's address. | 28th Mar 1922 | Box 21 \ 6 Scan061 | |
| Telegram received by telephone regarding driving a vehicle on an expired licence. | 28th Mar 1922 | Box 21 \ 6 Scan062 | |
| Confirmation of a telegram sent to Hancock with instructions about not returning boxes until further items are received. | 28th Mar 1922 | Box 21 \ 6 Scan063 | |
| The key for an Essex ignition switch intended for Mr. Hancock. | 3rd Apr 1922 | Box 21 \ 6 Scan064 | |
| Recommendation to take a dynamometer curve of the Essex car chassis HP before disposal. | 22th Apr 1922 | Box 21 \ 6 Scan065 | |
| Dynamometer test results for an Essex Car, detailing horsepower and lbs at various engine revolutions. | 12th Apr 1922 | Box 21 \ 6 Scan066 | |
| Disposing of D.F.P., Essex and Marmon cars, and a recommendation to try the new Sunbeam car as a competitor to the Goshawk. | 14th Jun 1922 | Box 21 \ 6 Scan067 | |
| Request for a condition report on an Essex car to complete a potential sale. | 11th Jul 1922 | Box 21 \ 6 Scan068 | |
| The condition and mileage of an 'ESSEX' car. | 12th Jul 1922 | Box 21 \ 6 Scan069 | |
| Arranging for a Terraplane car to be delivered for a test drive, confirming the model type required. | 14th Sep 1933 | Box 21 \ 6 Scan070 | |
| Purchasing a Terraplane Saloon car to compare with the future 25 HP J.111 model. | 15th Sep 1933 | Box 21 \ 6 Scan071 | |
| Confirming the arrangement for a Terraplane vehicle to be of the Saloon type. | 15th Sep 1933 | Box 21 \ 6 Scan072 | |
| Test run of a Railton 4 Litres Terraplane, detailing performance, specifications, and pricing. | 26th Sep 1933 | Box 21 \ 6 Scan073 | |
| Specifications and performance graph for an Essex Terraplane Eight vehicle. | 25th Sep 1933 | Box 21 \ 6 Scan074 | |
| Stamped sheet from the Print Room in Derby. | 27th Sep 1933 | Box 21 \ 6 Scan075 | |
| Road test report on an Essex-Terraplane car, noting its sweet engine but bad ride control and body issues. | 24th Sep 1932 | Box 21 \ 6 Scan076 | |
| Speedometer check and acceleration test for an Essex Terraplane. | 30th Sep 1933 | Box 21 \ 6 Scan077 | |
| The performance and features of the Essex 8 Cylinder Terraplane. | 10th Oct 1933 | Box 21 \ 6 Scan078 | |
| Reports on the Essex Terraplane engine and its disposal. | 6th Oct 1933 | Box 21 \ 6 Scan079 | |
| Two reports on the performance and characteristics of the Essex 8 Cylinder Terraplane and Essex Terraplane vehicles. | 9th Oct 1933 | Box 21 \ 6 Scan080 | |
| Test drive and technical analysis of a 4-litre Terraplane car, noting good performance but poor high-speed handling. | 9th Oct 1933 | Box 21 \ 6 Scan081 | |
| Vehicle analysis, detailing proposed inspections and comparisons to Bentley and Terraplane models. | 9th Oct 1933 | Box 21 \ 6 Scan082 | |
| Performance test results for an Essex Terraplane car, including hill climbs, acceleration, speed and fuel consumption. | 13th Oct 1933 | Box 21 \ 6 Scan083 | |
| The dismantling and engine lubrication system of an Essex Terraplane '8' car. | 27th Oct 1933 | Box 21 \ 6 Scan084 | |
| Construction and condition of various engine components including bearings, drives, and lubrication systems. | 27th Oct 1933 | Box 21 \ 6 Scan085 | |
| Specifications for engine components including the crankshaft, pistons, and connecting rods. | 27th Oct 1933 | Box 21 \ 6 Scan086 | |
| Technical specifications for engine components including valves, manifolds, carburation, and ignition. | 27th Oct 1933 | Box 21 \ 6 Scan087 | |
| Specification sheet detailing the water system, engine mounting, clutch, gearbox, rear axle, and brakes. | 27th Oct 1932 | Box 21 \ 6 Scan088 | |
| Technical description of the steering, springs, and frame construction. | 27th Oct 1933 | Box 21 \ 6 Scan089 | |
| Photograph of the induction and exhaust manifolds for an Essex Terraplane '8', showing the exhaust heated induction passage. | 27th Oct 1933 | Box 21 \ 6 Scan090 | |
| Photograph with annotations of the induction and exhaust manifolds for an Essex Terraplane 'B'. | 27th Oct 1933 | Box 21 \ 6 Scan091 | |
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