| Description | Date | Identifier | |
| Remarks on letters received concerning Mex Motor Spirit. | 22th Jan 1915 | Box 20 \ 4 Scan009 | |
| Letter from William Arnold enquiring about the suitability of Mex petrol for Chassis 31-PB. | 21th Jan 1915 | Box 20 \ 4 Scan010 | |
| Customer letter of complaint about the quality of Shell fuel and seeking advice on using 'Mex' Spirit as an alternative. | 20th Jan 1915 | Box 20 \ 4 Scan011 | |
| Clarifying the use of Mex Motor Spirit for testing purposes compared to the superior Shell No.1 spirit. | 23th Jan 1915 | Box 20 \ 4 Scan012 | |
| Potential change in petrol suppliers from 'Mex' to 'Shell'. | 11th Aug 1920 | Box 20 \ 4 Scan013 | |
| Complaint regarding short-filled and unsealed tins of Mex petrol from The Bowring Petroleum Company. | 9th Feb 1920 | Box 20 \ 4 Scan014 | |
| Questioning the continued use of Mex Petrol and recommending a switch to Shell Spirit. | 23th Jun 1920 | Box 20 \ 4 Scan015 | |
| Cost and quality of different petrol suppliers for engine testing. | 27th Jan 1921 | Box 20 \ 4 Scan016 | |
| Laboratory comparison report of two petrol samples, 'Mex' and 'BP1', detailing their properties. | 11th Feb 1921 | Box 20 \ 4 Scan017 | |
| Laboratory report detailing the distillation results of a Shell Mex Spirit fuel sample. | 8th Aug 1931 | Box 20 \ 4 Scan018 | |
| Laboratory distillation test results for a mixture of Shell Mex Spirit and 10% Parafin. | 22th Aug 1921 | Box 20 \ 4 Scan019 | |
| Instruction sheet recording numerical data for a 'Max Spirit' test, likely for engine performance, at various RPMs. | 28th Oct 1918 | Box 20 \ 4 Scan020 | |
| Instruction sheet containing handwritten tabulated data for various revolution speeds. | 28th Oct 1918 | Box 20 \ 4 Scan021 | |
| Impracticality of testing all submitted oil brands and questioning the benefits of testing Shell Mex oil. | 27th Oct 1922 | Box 20 \ 4 Scan022 | |
| Page 2 of a memo regarding the policy on testing and reporting on parts. | 4th Nov 1922 | Box 20 \ 4 Scan023 | |
| Offer from Shell-Mex Limited to test their oils. | 4th Nov 1922 | Box 20 \ 4 Scan024 | |
| BJ to Hs agreeing to write to the Shell Company regarding Shell Mex. | 28th Nov 1922 | Box 20 \ 4 Scan025 | |
| Attaching a copy of a letter addressed to Shell-Mex Ltd. | 30th Nov 1922 | Box 20 \ 4 Scan026 | |
| Letter to Shell-Mex Ltd. concerning the requirements for testing their oil for potential recommendation. | 29th Nov 1922 | Box 20 \ 4 Scan027 | |
| Page 2 of a letter outlining the policy for testing goods from other firms. | 29th Nov 1922 | Box 20 \ 4 Scan028 | |
| Letter from Harry Ricardo discussing the performance of a special Shell oil compared to castor oil. | 16th Apr 1923 | Box 20 \ 4 Scan029 | |
| Announcing the market availability of Shell Super-Light Oil after testing. | 1st Sep 1923 | Box 20 \ 4 Scan030 | |
| 'Hs' to 'Ms' requesting an order for 20 gallons of oil. | 1st Oct 1923 | Box 20 \ 4 Scan031 | |
| The performance differences of a 20 HP engine using various brands of petrol. | 26th Oct 1923 | Box 20 \ 4 Scan032 | |
| Comparative tests of different petrol grades to determine differences in 'loading up' during low-speed, full-throttle work on a 4-Goshawk-11. | 25th Oct 1923 | Box 20 \ 4 Scan033 | |
| Performance comparison of 20 HP cars using various brands of petrol. | 24th Dec 1924 | Box 20 \ 4 Scan034 | |
| Suitability of Shell-Mex oils and the pressure to conduct tests on them. | 24th Dec 1924 | Box 20 \ 4 Scan035 | |
| Letter from Shell-Mex Ltd. regarding a customer's query about using their oil without voiding the car's guarantee. | 22th Dec 1924 | Box 20 \ 4 Scan036 | |
| Oil recommendations and customer feedback, comparing super light oil to medium viscosity oil. | 29th Jan 1925 | Box 20 \ 4 Scan037 | |
| Enquiry from Frederick Goodliffe of City Cheese Warehouse regarding the merits of Shell Mex and B.P. motor spirits. | 22th Mar 1926 | Box 20 \ 4 Scan038 | |
| Letter responding to a query about the use and performance of different fuel types, specifically Shell Mex motor spirit. | 29th Mar 1926 | Box 20 \ 4 Scan039 | |
| Suitability of Shell-de-Luxe versus Shell super-light engine oils. | 12th Apr 1926 | Box 20 \ 4 Scan040 | |
| Cover memo regarding a letter from Shell Mex Ltd and a proposed reply. | 28th Jun 1926 | Box 20 \ 4 Scan041 | |
| Letter to Shell-Mex Limited deferring a proposed visit regarding 'Shell' lubricants due to an inability to conduct tests. | 28th Jun 1926 | Box 20 \ 4 Scan042 | |
| Letter from Shell-Mex Limited regarding the international distribution of their motor oils. | 25th Jun 1926 | Box 20 \ 4 Scan043 | |
| Letter from Shell Mex Limited clarifying the widespread distribution of their oils and requesting a meeting. | 25th Jun 1926 | Box 20 \ 4 Scan044 | |
| Letter from Shell-Mex inquiring about progress on long-distance flight tests and difficulties experienced with freezing. | 5th Apr 1927 | Box 20 \ 4 Scan045 | |
| Petrol supply failure caused by fluff found in fuel from Shell-Mex. | 2nd Jun 1927 | Box 20 \ 4 Scan046 | |
| Letter from Shell-Mex Limited responding to a complaint about impurities in their petrol. | 19th May 1927 | Box 20 \ 4 Scan047 | |
| Confidential letter regarding an offer from Shell Mex Ltd to test their new 'Racing Shell' petrol. | 17th Feb 1930 | Box 20 \ 4 Scan048 | |
| Informational leaflet on 'Racing Shell' fuel for high-performance engines, detailing its properties, benefits, and retail price. | 17th Feb 1930 | Box 20 \ 4 Scan049 | |
| Guide on the properties and usage of 'Racing Shell' fuel for various engine types. | 18th Feb 1930 | Box 20 \ 4 Scan050 | |
| Request to test Shell Petrol on cars and aero engines, asking for its H.U.C.R. value. | 18th Feb 1930 | Box 20 \ 4 Scan051 | |
| Query regarding the receipt of a 50-gallon sample of 'Racing Shell' petrol. | 28th Feb 1930 | Box 20 \ 4 Scan052 | |
| Confirmation of receipt of a 50-gallon sample of 'Racing Shell' fuel. | 1st Mar 1930 | Box 20 \ 4 Scan053 | |
| Letter to Shell-Mex Ltd. requesting anti-knock values and Ricardo's figures for 'Racing Shell' petrol. | 1st Mar 1930 | Box 20 \ 4 Scan054 | |
| Use of Shell Lubricating Oil in the 23-EX 10,000 miles test car. | 3rd Apr 1930 | Box 20 \ 4 Scan055 | |
| Letter from Shell-Mex Limited regarding the specifications of Triple Shell Motor Oil and its comparison to competitor products. | 16th Apr 1930 | Box 20 \ 4 Scan056 | |
| Postscript from Shell-Mex Limited regarding the availability of Triple Shell Motor oil in France for experimental use. | 16th Apr 1930 | Box 20 \ 4 Scan057 | |
| Specification sheet for Triple Shell Motor Oil. | 16th Apr 1930 | Box 20 \ 4 Scan058 | |
| The change to Shell Spirit D.T.D. 134 for H. Engine tests, discussing its aromatic hydrocarbon content. | 7th May 1930 | Box 20 \ 4 Scan059 | |
| Laboratory report on the analysis of a spirit sample against D.T.D. 134 specification. | 14th May 1930 | Box 20 \ 4 Scan060 | |
| Letter from Shell-Mex and B.P. Ltd confirming a meeting with Mr. Hives regarding aviation fuels and a Phantom II engine viewing. | 21th Feb 1933 | Box 20 \ 4 Scan061 | |
| Test results for wheelbase and steering lock turning circles on a 1907 long car and a 1908 type frame. | 16th Mar 1911 | Box 20 \ 5 Scan001 | |
| Steering specifications detailing the turning circles for the 1550 chassis. | 16th Mar 1911 | Box 20 \ 5 Scan002 | |
| Specification sheet for steering turning circles of the 1550 chassis. | 18th Mar 1911 | Box 20 \ 5 Scan003 | |
| Steering turning circles data for the 1900 chassis. | 31th Jan 1912 | Box 20 \ 5 Scan004 | |
| Steering test results detailing the smallest turning circles for short and long chassis. | 7th Dec 1909 | Box 20 \ 5 Scan005 | |
| Comparing the smaller turning circle of a 45hp Fiat to a Rolls-Royce car, questioning the effect of its shorter wheelbase. | 30th Oct 1911 | Box 20 \ 5 Scan006 | |
| Instruction note comparing vehicle turning circles for different wheelbases. | 31th Oct 1911 | Box 20 \ 5 Scan007 | |
| Instructions with a table of dimensions regarding differences in wheel bores and steering. | 31th Oct 1911 | Box 20 \ 5 Scan008 | |
| Note recording the steering lock diameters for right and left hand turns, with steering stops. | 27th Mar 1908 | Box 20 \ 5 Scan009 | |
| On steering wheel movement specifications for full lock. | 6th Sep 1909 | Box 20 \ 5 Scan010 | |
| Extract from a report discussing the turning circle of various chassis. | 9th Oct 1912 | Box 20 \ 5 Scan011 | |
| The turning circle and steering lock adjustments for a chassis. | 24th Oct 1912 | Box 20 \ 5 Scan012 | |
| Technical report discussing dynamometer testing, silencer explosions, and a comparative analysis of steering wobble with a Daimler car. | 24th Oct 1912 | Box 20 \ 5 Scan013 | |
| Wheel wobble and balance testing, including notes on a Delaunay-Belleville vehicle. | 24th Oct 1912 | Box 20 \ 5 Scan014 | |
| Technical report comparing steering and wobble characteristics of Napier and R.R. No. 2100E cars against competitors. | 9th Sep 1916 | Box 20 \ 5 Scan015 | |
| Extract from a report on a steering wobble issue for Chassis No. 7-CA, suggesting modifications. | 9th Sep 1916 | Box 20 \ 5 Scan016 | |
| Confirmation of a telegram requesting the turning circle for the standard forty fifty car. | 18th Nov 1918 | Box 20 \ 5 Scan017 | |
| Turning circles of a chassis, with comparisons of lock angles to other manufacturers like Delauney, Daimler, and Napier. | 18th Nov 1918 | Box 20 \ 5 Scan018 | |
| Weakness of steering lock stops and a proposal to strengthen them. | 25th Apr 1921 | Box 20 \ 5 Scan019 | |
| Table of turning circle dimensions for the 40/50 and Goshawk II chassis. | 1st Dec 1923 | Box 20 \ 5 Scan020 | |
| Requesting the turning circle of a Hispano, a short chassis, and a long chassis, both with and without balloon tyres. | 28th Nov 1923 | Box 20 \ 5 Scan021 | |
| Attached chart showing turning circles for 40/50 HP, Coshawk ll., and Hispano cars. | 1st Dec 1923 | Box 20 \ 5 Scan022 | |
| From CJ to Hs regarding turning circles and a request to forward a related document. | 1st Dec 1923 | Box 20 \ 5 Scan023 | |
| Accompanying a print that compares turning circles for 40/50 and 20 HP models with standard balloon tyres. | 5th Dec 1923 | Box 20 \ 5 Scan024 | |
| Requesting clarification on the turning circle figures for the 40/50 long chassis, comparing data from various sources. | 12th Jan 1924 | Box 20 \ 5 Scan025 | |
| Request for steering specifications, locks, and turning circles for the Hispano Suiza. | 23th Jan 1924 | Box 20 \ 5 Scan026 | |
| Communication regarding a report on Balloon Tyres, supply from Dunlop, and the effect on turning circles for 20 HP and 40/50 HP cars. | 23th Jan 1924 | Box 20 \ 5 Scan027 | |
| Requesting information on the turning circles for the 40/50 model. | 24th Jan 1924 | Box 20 \ 5 Scan028 | |
| Discrepancy in steering lock angles and a check of the turning circles for the 40/50 HP chassis. | 29th Jan 1924 | Box 20 \ 5 Scan029 | |
| The turning circles for a 40/50 HP long chassis with a 150' wheelbase. | 12th Jul 1923 | Box 20 \ 5 Scan030 | |
| Turning circles and locks on a production chassis, particularly the challenges with front wheel brake models. | 31th Jan 1924 | Box 20 \ 5 Scan031 | |
| Querying turning circle figures for various chassis models. | 1st Feb 1924 | Box 20 \ 5 Scan032 | |
| From CJ to Hs questioning the larger turning circle of PN's car and its implications for other chassis. | 2nd Feb 1924 | Box 20 \ 5 Scan033 | |
| Issues with a car's turning circle, specifically concerning condemned radius rods and ongoing modifications. | 2nd Feb 1924 | Box 20 \ 5 Scan034 | |
| Turning circles for different chassis, comparing measurements over hub caps versus track lines. | 7th Feb 1924 | Box 20 \ 5 Scan035 | |
| The steering geometry and lever measurements for a Hispano model. | 7th Feb 1924 | Box 20 \ 5 Scan036 | |
| Showing design details and movement of a Hispano Suiza steering system. | 7th Jul 1924 | Box 20 \ 5 Scan037 | |
| Recommending final test procedures for the 40/50 HP steering to address variations in turning circles. | 2nd Feb 1924 | Box 20 \ 5 Scan038 | |
| Querying the turning circles of various chassis models, including the EAC.III and the 40/50. | 2nd Feb 1924 | Box 20 \ 5 Scan039 | |
| Setting steering locks and defining the turning circle for the 40/50 HP chassis. | 1st Feb 1924 | Box 20 \ 5 Scan040 | |
| Instructions regarding front wheel and steering dimensions for the 20-HP model. | 11th Feb 1924 | Box 20 \ 5 Scan041 | |
| Turning circles of long and short chassis, and modifications to improve the lock. | 2nd Feb 1924 | Box 20 \ 5 Scan042 | |
| Turning circles with the latest EAC.111 Axle compared to the standard long chassis. | 2nd May 1924 | Box 20 \ 5 Scan043 | |
| Confidential memo from B.J. to E.A.C. inquiring about the turning circle of the E.A.C.2. | 15th May 1924 | Box 20 \ 5 Scan044 | |
| Secret memorandum specifying the turning circles for the EAC.11 model, referencing the EAC.111. | 17th May 1924 | Box 20 \ 5 Scan045 | |
| From GWH to Mr. Hives detailing the turning circles for the 98-NK car. | 21th May 1924 | Box 20 \ 5 Scan046 | |
| The changes in turning circles for a 20 HP model due to a new steering system. | 15th Apr 1926 | Box 20 \ 5 Scan047 | |
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