| Description | Date | Identifier | |
| Road test data and performance figures for a Terraplane 6. | 4th Feb 1935 | Box 21 \ 6 Scan192 | |
| Specification sheet for the Essex Terraplane Six engine. | 4th Feb 1935 | Box 21 \ 6 Scan193 | |
| Specifications for engine components including connecting rods, pistons, and crankcase. | 4th Feb 1935 | Box 21 \ 6 Scan194 | |
| Specifications for engine components including cylinder block, head, and valve train, with a diagram of the port layout. | 4th Feb 1935 | Box 21 \ 6 Scan195 | |
| Specifications for a camshaft, including materials, dimensions, and drive mechanisms. | 4th Feb 1935 | Box 21 \ 6 Scan196 | |
| The rebuild of a J-III Unit and a Terraplane. | 18th Feb 1935 | Box 21 \ 6 Scan197 | |
| Request to dismantle an Essex Gearbox for inspection. | 26th Feb 1935 | Box 21 \ 6 Scan198 | |
| The inspection, construction, and weight analysis of an Essex 6 Terraplane. | 28th Feb 1935 | Box 21 \ 6 Scan199 | |
| Construction and materials of a vehicle's body, floor, roof, pillars, and doors. | 28th Feb 1935 | Box 21 \ 6 Scan200 | |
| Construction and performance of car bodywork, chassis, and brake components. | 28th Feb 1935 | Box 21 \ 6 Scan201 | |
| Analysis and conclusions on various chassis and engine components. | 28th Feb 1935 | Box 21 \ 6 Scan202 | |
| Car's bodywork, including noise damping, paint condition, rust, and a comparison with a Bentley. | 20th Feb 1935 | Box 21 \ 6 Scan203 | |
| List of component weights for an Essex Terraplane 6-cylinder vehicle. | 28th Feb 1935 | Box 21 \ 6 Scan204 | |
| Weight breakdown of chassis components and fluids. | 28th Feb 1925 | Box 21 \ 6 Scan205 | |
| List of engine components with their corresponding weights in imperial units (Cwts, qrs, lbs, ozs). | 25th Feb 1935 | Box 21 \ 6 Scan206 | |
| Comparison of body component weights for Graham and Essex models. | 28th Feb 1935 | Box 21 \ 6 Scan207 | |
| Request for a complete Clutch Driven Plate to suit a Terraplane 6. | 1st Mar 1935 | Box 21 \ 6 Scan208 | |
| Request to Hudson Essex Motors Ltd. to send a clutch driven plate for a Terraplane 6. | 1st Mar 1935 | Box 21 \ 6 Scan209 | |
| Analysis of vehicle weights, comparing different models and components for potential savings. | 4th Mar 1935 | Box 21 \ 6 Scan210 | |
| Comparison of a standardised Bentley Saloon body against American car bodies regarding weight, dimensions, and construction materials. | 4th Mar 1935 | Box 21 \ 6 Scan211 | |
| Comparison of body and chassis weights for various Bentley and American cars. | 4th Mar 1935 | Box 21 \ 6 Scan212 | |
| Weight breakdown of components for a Pontiac and a Standard Saloon. | 4th Mar 1935 | Box 21 \ 6 Scan213 | |
| List of weights for various car body components for Graham-Paige and Terraplane models. | 4th Mar 1935 | Box 21 \ 6 Scan214 | |
| Weight comparison table for vehicle components between Bentley, Pontiac, and Essex Terraplane models. | 8th Mar 1935 | Box 21 \ 6 Scan215 | |
| Breakdown of weights for Bentley and Essex vehicle components. | 8th Mar 1935 | Box 21 \ 6 Scan216 | |
| Comparison of wheel and tyre weights and ground clearance for Bentley, Buick, Graham, and Essex vehicles. | 14th Mar 1935 | Box 21 \ 6 Scan217 | |
| Weights of various Terraplane 6 engine and gearbox components. | 15th Mar 1935 | Box 21 \ 6 Scan218 | |
| Report on the Essex Terraplane and offering blueprints of further particulars. | 8th Apr 1935 | Box 21 \ 6 Scan219 | |
| Request for two more Terraplane 6 clutch driven plates following a successful experiment. | 8th Apr 1935 | Box 21 \ 6 Scan220 | |
| Exchanging information about Cadillac and Terraplane engine units. | 6th Feb 1935 | Box 21 \ 6 Scan221 | |
| The dispatch of two clutch driven plates for a Terraplane 6. | 9th Apr 1935 | Box 21 \ 6 Scan222 | |
| Trialling a Terraplane spring drive in a standard production 20/25 clutch. | 11th Apr 1935 | Box 21 \ 6 Scan223 | |
| Blueprint of the cylinder head face for a Terraplane 6 engine. | 26th Apr 1935 | Box 21 \ 6 Scan224 | |
| Invoice from Hudson Motors Ltd. for clutch plates for a Terraplane 6 and checking on their delivery status. | 14th May 1935 | Box 21 \ 6 Scan225 | |
| Confirming receipt and requesting to book in two clutch plates. | 15th May 1935 | Box 21 \ 6 Scan226 | |
| Price of a Packard 'One-Twenty' and the logistics of replacing a Terraplane with a Graham vehicle. | 14th Jun 1935 | Box 21 \ 6 Scan227 | |
| Essex Terraplane car being sent to Lillie Hall. | 25th Jun 1935 | Box 21 \ 6 Scan228 | |
| Brief memo regarding a Packard car delivery and the despatch of a Terraplane. | 27th Jun 1935 | Box 21 \ 6 Scan229 | |
| Minutes from the 75th meeting regarding a comparative analysis of a Fiat car's wheelbase and turning circle. | 15th Nov 1911 | Box 21 \ 7 Scan001 | |
| Trial report on a 30-40 HP 4 Cylinder Fiat with a limousine body. | 5th Dec 1911 | Box 21 \ 7 Scan002 | |
| Recommending a newly purchased Fiat car be sent for comparison against the D.F.P. car and the new 'Peregrine' design. | 9th Mar 1922 | Box 21 \ 7 Scan003 | |
| Brief typed memo regarding arrangements to send a Fiat to West Wittering. | 10th Mar 1922 | Box 21 \ 7 Scan004 | |
| Test drive report and critique of a 10 horse power Fiat with an open body. | 13th Mar 1922 | Box 21 \ 7 Scan005 | |
| Bodywork of a Fiat chassis, comparing an Italian-built body with a proposed English version. | 14th Mar 1922 | Box 21 \ 7 Scan006 | |
| Extract concerning the arrangement for a Fiat car to be delivered from Brighton. | 16th Mar 1922 | Box 21 \ 7 Scan007 | |
| Hurried inspection report detailing eleven points on a 10 HP Fiat car. | 23th May 1922 | Box 21 \ 7 Scan008 | |
| Continued assessment of a vehicle, covering springing, carburetion, and chassis quality. | 4th Aug 1922 | Box 21 \ 7 Scan009 | |
| Query to Mr. Hives regarding the return and potential borrowing of a Fiat and a Delage car. | 4th Aug 1922 | Box 21 \ 7 Scan010 | |
| Short memo regarding the unknown availability of a Delage and a Fiat car. | 8th Aug 1922 | Box 21 \ 7 Scan011 | |
| Request for a status update on the receipt and work completion timeline for Delage and Fiat cars. | 16th Aug 1922 | Box 21 \ 7 Scan012 | |
| 10-15 HP Fiat Car, its readiness for re-sale, and new instructions to ship it to India. | 29th Aug 1922 | Box 21 \ 7 Scan013 | |
| Delayed return of a 10-15 HP Fiat car by Mr. Royce. | 30th Aug 1922 | Box 21 \ 7 Scan014 | |
| Instruction, following Mr. Royce's orders, to acquire a new cylinder head for a 10 HP Fiat car. | 7th Oct 1922 | Box 21 \ 7 Scan015 | |
| From B.J. to Hs. arranging a test drive of a 40 HP Fiat. | 6th Apr 1925 | Box 21 \ 7 Scan016 | |
| Benefits of testing a 40 HP Fiat at the Derby facility. | 8th Apr 1925 | Box 21 \ 7 Scan017 | |
| Difficulty of borrowing a demonstration Fiat for testing, suggesting it will now be tested in London. | 17th Apr 1925 | Box 21 \ 7 Scan018 | |
| Arranging a test drive of a 40 HP Fiat car for reporting purposes. | 15th Jul 1925 | Box 21 \ 7 Scan019 | |
| Examination and trial of a 40 HP Fiat car. | 5th Oct 1925 | Box 21 \ 7 Scan020 | |
| Trial of a 40 HP Fiat car and considering other vehicles like Alfa Romeo and a new 6-cylinder sleeve valve Vauxhall. | 6th Oct 1925 | Box 21 \ 7 Scan021 | |
| Arranging a re-trial run on a Fiat. | 14th Oct 1925 | Box 21 \ 7 Scan022 | |
| Arranging a trial run on a Fiat and a similar trial for an Austro-Daimler. | 15th Oct 1925 | Box 21 \ 7 Scan023 | |
| From Hs. to C. about sending an assistant to test Fiat and Austro-Daimler cars. | 19th Oct 1925 | Box 21 \ 7 Scan024 | |
| Road test reports for a 40 HP Fiat and a 19-HP Austro-Daimler, advising against their purchase. | 23th Oct 1925 | Box 21 \ 7 Scan025 | |
| Road trial of a 40 HP Fiat. | 20th Oct 1925 | Box 21 \ 7 Scan026 | |
| Issues with tappet noise, gearbox difficulty, and clutch performance. | 12th Jun 1925 | Box 21 \ 7 Scan027 | |
| The performance of a vehicle's brakes and steering. | 23th Oct 1925 | Box 21 \ 7 Scan028 | |
| Car's rear axle, suspension, road performance, and acceleration. | 12th Jun 1925 | Box 21 \ 7 Scan029 | |
| Vehicle acceleration, engine performance, and braking systems. | 23th Oct 1925 | Box 21 \ 7 Scan030 | |
| Observations from a car test run, including braking, steering, and general impressions. | 23th Oct 1925 | Box 21 \ 7 Scan031 | |
| The road trial of an Austro-Daimler car, detailing its specifications, test conditions, and initial observations. | 20th Oct 1925 | Box 21 \ 7 Scan032 | |
| The performance of a vehicle's camshaft, gearbox, clutch, and steering. | 12th Aug 1925 | Box 21 \ 7 Scan033 | |
| Page 3 detailing vehicle road test feedback on brakes, axle, suspension, and performance. | 12th Jun 1925 | Box 21 \ 7 Scan034 | |
| Car performance, including hill climb results, speedometer checks, acceleration figures and comparisons to other models. | 23th Oct 1925 | Box 21 \ 7 Scan035 | |
| Comparing car performance metrics including windage, braking, and engine efficiency against a 20 HP model and an Austro-Daimler. | 23th Oct 1925 | Box 21 \ 7 Scan036 | |
| Analyzing an engine's design and comparing the car's performance to a Chrysler. | 23th Oct 1925 | Box 21 \ 7 Scan037 | |
| Evaluation of a small Fiat car as a potential offering in the 'Peregrine' class. | 13th Nov 1931 | Box 21 \ 7 Scan038 | |
| Technical assessment and review of a 2.5 Litre Fiat Saloon. | 13th Nov 1931 | Box 21 \ 7 Scan039 | |
| Vehicle road test report providing impressions on performance and comparing it with competing models. | 13th Nov 1931 | Box 21 \ 7 Scan040 | |
| Potential purchase and testing of a Fiat car. | 14th Nov 1931 | Box 21 \ 7 Scan041 | |
| Proposing the evaluation of a small Fiat to inform the design and cost of the upcoming 'Peregrine' project. | 1st Jan 1932 | Box 21 \ 7 Scan042 | |
| Comparison of the Peregrine model with a Talbot 90 and a small Fiat for production and cost analysis. | 1st Jan 1932 | Box 21 \ 7 Scan043 | |
| Confirming arrangements to collect and trial a 20 HP six-cylinder Fiat Saloon against other cars. | 13th Jan 1932 | Box 21 \ 7 Scan044 | |
| Letter from CJ to R. enclosing a newspaper cutting from 'The Times' about the new Hispano-Suiza. | 4th Oct 1920 | Box 22 \ 1 Scan001 | |
| Newspaper article from The Times reviewing the new 32-135 HP Hispano-Suiza car. | 2nd Oct 1920 | Box 22 \ 1 Scan002 | |
| Comparative review of competitor cars from the Olympia Show. | 11th Nov 1920 | Box 22 \ 1 Scan003 | |
| Suggesting the acquisition of a Hispano Suiza car for competitive analysis. | 13th Jun 1923 | Box 22 \ 1 Scan004 | |
| Secret memorandum on the urgent need to fit front wheel brakes, suggesting the acquisition of a competitor's Hispano car for comparison. | 27th Sep 1923 | Box 22 \ 1 Scan005 | |
| Secret memo regarding arrangements to test four-wheel brakes on a Hispano Suiza car. | 1st Oct 1923 | Box 22 \ 1 Scan006 | |
| Confidential memo requesting to arrange a self-driven test of a Hispano car to assess its system. | 1st Oct 1923 | Box 22 \ 1 Scan007 | |
| Internal memorandum detailing a negative assessment of a competitor's car, the Isotta-Fraschini. | 18th Oct 1923 | Box 22 \ 1 Scan008 | |
| Communication regarding the delivery of an Isotta Fraschini car for sale and an inquiry about a Hispano car. | 1st Oct 1923 | Box 22 \ 1 Scan009 | |
| Need to acquire a modern Hispano car for testing purposes. | 31th Oct 1923 | Box 22 \ 1 Scan010 | |
| Extract discussing 8-cylinder in-line engines and competitor 'Hispano'. | 18th Oct 1923 | Box 22 \ 1 Scan011 | |
| Potential acquisition and testing of a competitor's Hispano car. | 29th Oct 1923 | Box 22 \ 1 Scan012 | |
| Proposal to purchase a used 1923 Hispano Suiza open touring car from a retailer as an alternative to waiting for a new one. | 6th Nov 1923 | Box 22 \ 1 Scan013 | |
| Potential purchase of a Hispano Suiza car, requesting a test drive beforehand. | 7th Nov 1923 | Box 22 \ 1 Scan014 | |
| Trial run report comparing a new Hispano Suiza car with a 1923 model, focusing on engine and brake performance. | 3rd Nov 1923 | Box 22 \ 1 Scan015 | |
| Vehicle test drive, evaluating braking, steering, and suspension performance. | 3rd Nov 1923 | Box 22 \ 1 Scan016 | |
| The braking and turning circle of a Hispano car. | 13th Nov 1923 | Box 22 \ 1 Scan017 | |
| Request for the weight of a Hispano Suiza car and data on the co-efficient of friction for different road surfaces. | 13th Nov 1923 | Box 22 \ 1 Scan018 | |
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