| Description | Date | Identifier | |
| Patent application, referencing the prior work of Renault on governor-controlled shock absorber damping. | 11th Nov 1932 | Box 15 \ 6 Scan183 | |
| Development of governor-controlled shock dampers, patents, and design modifications for various models. | 1st Nov 1932 | Box 15 \ 6 Scan184 | |
| Proposed servo system design and related patent considerations. | 7th Nov 1932 | Box 15 \ 6 Scan185 | |
| Letter discussing a special petrol additive for destroying carbon and improving engine performance. | 9th Nov 1932 | Box 15 \ 6 Scan186 | |
| Legal position on a new servo patent in relation to an existing Hispano patent. | 11th Nov 1932 | Box 15 \ 6 Scan187 | |
| Potential for a patent on a new independent front wheel suspension system. | 24th Dec 1932 | Box 15 \ 6 Scan188 | |
| Describing a new oil-proof packing material and another for high-temperature applications. | 30th Dec 1932 | Box 15 \ 6 Scan189 | |
| Secret internal memo requesting a set of instruments for a new car's instrument board design. | 12th May 1924 | Box 15 \ 7 Scan001 | |
| Secret memorandum regarding the design, construction, and lighting tests for a new instrument board for the 40/50 chassis. | 23th May 1924 | Box 15 \ 7 Scan002 | |
| Secret memo discussing the design, illumination, and materials for an instrument board. | 23th Oct 1924 | Box 15 \ 7 Scan003 | |
| Proposal for a specially shaped, central lozenge instrument board for 'W' Series cars. | 9th Dec 1924 | Box 15 \ 7 Scan004 | |
| Production of a new 'W' series lozenge-shaped instrument board. | 15th Dec 1924 | Box 15 \ 7 Scan005 | |
| Fitment of an instrument board to the first three 'W' series experimental cars. | 12th Dec 1924 | Box 15 \ 7 Scan006 | |
| Cautious production and fitting of a special central grouped instrument scheme. | 30th Dec 1924 | Box 15 \ 7 Scan007 | |
| Request from Capt. Burt for a new design of framed instruments to be fitted to his New Phantom. | 2nd Jul 1925 | Box 15 \ 7 Scan008 | |
| The supply of extra framed instruments for Capt. Burt. | 1st Jul 1925 | Box 15 \ 7 Scan009 | |
| Requesting a list of instruments for a double enclosed limousine body being fitted at Hoopers for a New Phantom chassis. | 18th Jul 1925 | Box 15 \ 7 Scan010 | |
| Experimental blueprint N.Scheme 2027 for a new instrument board arrangement for the 7-Ex. and 'X' Series. | 7th Aug 1925 | Box 15 \ 7 Scan011 | |
| Request from Capt. Burt to purchase a non-standard experimental instrument cluster for his New Phantom. | 26th Aug 1925 | Box 15 \ 7 Scan012 | |
| Proposing steering improvements for the New Phantom and Goshawk models to address high and low-speed wobbles. | 28th Aug 1925 | Box 15 \ 7 Scan013 | |
| Instrument boards, proposals for Mr. Royce's new car, and the standardisation of dials. | 31th Oct 1925 | Box 15 \ 7 Scan014 | |
| Letter regarding proposals for instrument boards and arranging a meeting to finalise the policy. | 31th Oct 1925 | Box 15 \ 7 Scan015 | |
| Dispatch of a set of instruments for Mr. Royce's new car. | 1st Nov 1925 | Box 15 \ 7 Scan016 | |
| Despatch note for a batch of instruments for Mr. Royce's new car. | 3rd Nov 1925 | Box 15 \ 7 Scan017 | |
| Design and faults of instruments, instrument boards, and petrol gauges for Phantom and India models. | 16th Mar 1926 | Box 15 \ 7 Scan018 | |
| Letter to E. Dent & Sons ordering a set of instrument parts and inquiring about the future bulk production of dials. | 30th Apr 1926 | Box 15 \ 7 Scan019 | |
| Enquiring when six specific car instruments can be produced with cream faces, black figures and tipped hands. | 31th May 1926 | Box 15 \ 7 Scan020 | |
| Signed agreement document regarding the standardisation of coachwork features. | 16th Jul 1926 | Box 15 \ 7 Scan021 | |
| Design and components for a framed instrument panel with interior lighting. | 13th Aug 1926 | Box 15 \ 7 Scan022 | |
| Standardisation of chassis parts, specifically the transposition of the ammeter and thermometer for 20 HP and 40/50 HP models. | 14th Jul 1926 | Box 15 \ 7 Scan023 | |
| Unfused electrical connection for an indicating lamp in framed instruments. | 16th Nov 1926 | Box 15 \ 7 Scan024 | |
| Status of grouped instruments, clocks, dials, and speedometers for new car models. | 7th Jul 1927 | Box 15 \ 7 Scan025 | |
| Letter discussing the design of a winding mechanism for car clocks, suggesting a bevel gear arrangement. | 20th Jul 1927 | Box 15 \ 7 Scan026 | |
| Ideal material for instrument dials, comparing porcelain with silvered faces, and considerations for grouped instruments. | 1st Aug 1927 | Box 15 \ 7 Scan027 | |
| Standard finish for instrument dials, comparing cream, silvered, and black options. | 9th Aug 1927 | Box 15 \ 7 Scan028 | |
| Proposed grouped instrument layout, its convenience, and suitability for show cars. | 11th Aug 1927 | Box 15 \ 7 Scan029 | |
| The fitting of framed instruments to show cars and querying details on specific components like speedometers, clocks, and dials. | 13th Aug 1927 | Box 15 \ 7 Scan030 | |
| Design, layout, and potential sales policy for framed instrument panels for show cars. | 1st Aug 1927 | Box 15 \ 7 Scan031 | |
| Speedometer, clock, and dial finish for a grouped instrument panel. | 15th Aug 1927 | Box 15 \ 7 Scan032 | |
| Design approval and supply of grouped instruments, specifically the clock dial finishes. | 17th Aug 1927 | Box 15 \ 7 Scan033 | |
| Dispatch of a grouped instrument panel and the process for a credit note. | 7th Aug 1927 | Box 15 \ 7 Scan034 | |
| The despatch of a complete instrument panel for examination. | 7th Aug 1927 | Box 15 \ 7 Scan035 | |
| Design, approval, and fitting of grouped instrument dials for a chassis. | 17th Aug 1927 | Box 15 \ 7 Scan036 | |
| New patch of framed instruments and a Watford clock, considering standardization and use on Show cars. | 20th Aug 1927 | Box 15 \ 7 Scan037 | |
| Design, supply, and installation of framed instruments for Show cars. | 24th Aug 1927 | Box 15 \ 7 Scan038 | |
| Design and finish of framed instruments, including clocks, gauges, and thermometers. | 25th Aug 1927 | Box 15 \ 7 Scan039 | |
| The replacement of a clock and a sample set of framed instruments for a Phantom model. | 25th Aug 1927 | Box 15 \ 7 Scan040 | |
| Confirming the return of a patch instrument panel for fitting and examination. | 1st Aug 1927 | Box 15 \ 7 Scan041 | |
| Confirming the despatch of a sample instrument patch following instructions. | 26th Aug 1927 | Box 15 \ 7 Scan042 | |
| Internal memorandum about the grouped instrument scheme for show cars. | 29th Aug 1927 | Box 15 \ 7 Scan043 | |
| Questioning the delay in standardising improved shutter and carburettor controls for the Phantom model. | 6th Sep 1927 | Box 15 \ 7 Scan044 | |
| Deferral of a new grouped instrument scheme due to supply commitments and considering alternative American designs. | 1st Sep 1927 | Box 15 \ 7 Scan045 | |
| Confirming that signatures have been agreed for the instrument board controls standardisation sheet. | 19th Sep 1927 | Box 15 \ 7 Scan046 | |
| Design and progress of framed instrument panels, specifically concerning the colour of the mounts. | 18th Oct 1927 | Box 15 \ 7 Scan047 | |
| The production status of six sets of framed instruments with black mountings. | 24th Oct 1927 | Box 15 \ 7 Scan048 | |
| Fitting new framed instrument sets to trials cars, including car 70-EF, for propaganda purposes. | 27th Oct 1927 | Box 15 \ 7 Scan049 | |
| Modifications to the brakes lever, rear spring, and framed instruments for the first two sports cars. | 31th Oct 1927 | Box 15 \ 7 Scan050 | |
| Questioning whether to fit grouped instruments to a demonstration car based on cost figures and previous remarks. | 31th Oct 1927 | Box 15 \ 7 Scan051 | |
| On modifications to sports cars and an evaluation of different makes of engine revolution counters. | 2nd Nov 1927 | Box 15 \ 7 Scan052 | |
| The decision against using grouped instruments on the Sports Phantom and Standard Phantom models. | 11th Nov 1927 | Box 15 \ 7 Scan053 | |
| Secrecy around new 'grouped instruments' and instructing they not be fitted to the Sports Model. | 28th Nov 1927 | Box 15 \ 7 Scan054 | |
| From BJ to R. discussing the commercial and technical viability of a grouped instrument scheme. | 28th Nov 1927 | Box 15 \ 7 Scan055 | |
| Financial implications and sales strategy for grouped instrument schemes versus individual instruments. | 28th Nov 1927 | Box 15 \ 7 Scan056 | |
| Clarifying that experimental sports cars should be fitted with a framed patch of instruments and requesting frames be sent to Lillie Hall. | 16th Dec 1927 | Box 15 \ 7 Scan057 | |
| New shutter and starter carburettor controls for sports cars and the instrument layout on the 10-EX model. | 28th Dec 1927 | Box 15 \ 7 Scan058 | |
| Fitting of framed instrument patches and instrument board lighting for a 10,000-mile experimental sports car. | 20th Dec 1927 | Box 15 \ 7 Scan059 | |
| Arguing for the inclusion of grouped instruments in Sports models for better appearance and sales. | 9th Jan 1928 | Box 15 \ 7 Scan060 | |
| From R. to Hs. E. DA. discussing design improvements and features for the EAC.7 vehicle. | 9th Jan 1928 | Box 15 \ 7 Scan061 | |
| Developmental improvements and testing considerations for a new car model, including throttle cooling, ride comfort, and bodywork. | 19th Jan 1923 | Box 15 \ 7 Scan062 | |
| Installing and displaying a new grouped instrument set for sports and standard cars. | 19th Jan 1923 | Box 15 \ 7 Scan063 | |
| The instrument board for an experimental Hooper Sports Phantom. | 19th Jan 1928 | Box 15 \ 7 Scan064 | |
| Telegram received by telephone concerning a Hooper Sports car for experimental use. | 9th Jan 1928 | Box 15 \ 7 Scan065 | |
| Advocating for grouped instruments to be an optional extra on Sports models for better appearance and sales. | 1st Sep 1928 | Box 15 \ 7 Scan066 | |
| Placement of instruments and controls on the Continental Phantom dashboard. | 7th Feb 1928 | Box 15 \ 7 Scan067 | |
| Instrument board arrangement for the standard production EAC.14 car. | 21th Feb 1928 | Box 15 \ 7 Scan068 | |
| The commercial and design strategy for the instrument board, comparing it to competitors like Citroen and Chrysler. | 11th Apr 1928 | Box 15 \ 7 Scan069 | |
| Page 2 of a memo discussing the cost to the customer and selling only standard equipment. | 20th Apr 1928 | Box 15 \ 7 Scan070 | |
| Layout of instrument boards for the Phantom model. | 20th Apr 1928 | Box 15 \ 7 Scan071 | |
| Alternative layouts for the Phantom instrument board controls. | 15th May 1928 | Box 15 \ 7 Scan072 | |
| Proposed change to the Phantom instrument board layout, moving the carburetter and shutter controls. | 14th Jun 1928 | Box 15 \ 7 Scan073 | |
| Telegram received by telephone regarding a confirmation for the supply of an instrument patch. | 9th Jul 1928 | Box 15 \ 7 Scan074 | |
| Declining a request for instrument board sketches for car 14-EX, suggesting contacting the body builder. | 22th Aug 1928 | Box 15 \ 7 Scan075 | |
| Arranging to send instruments No. 2 to 10 to Hoopers. | 22th Oct 1928 | Box 15 \ 7 Scan076 | |
| The dispatch of an instrument panel and outer flange for Experimental Saloon No.18-EX. | 25th Oct 1928 | Box 15 \ 7 Scan077 | |
| Sending instrument board drawings for the 18-EX model to coachbuilders. | 31th Oct 1928 | Box 15 \ 7 Scan078 | |
| Production and usage of grouped instrument schemes for the S.S. Chassis. | 12th Nov 1928 | Box 15 \ 7 Scan079 | |
| Request for the return of remaining sets of grouped instrument boards for use on the 'SS' chassis. | 13th Nov 1928 | Box 15 \ 7 Scan080 | |
| The instrument board and accessories for car 19.EX, with instructions for Messrs Hooper & Co. | 13th Nov 1928 | Box 15 \ 7 Scan081 | |
| The status and dispatch of three sets of grouped instrument boards. | 14th Nov 1928 | Box 15 \ 7 Scan082 | |
| Request to supply a Stephen Greble Spot light and a Boa Constrictor Horn. | 19th Nov 1928 | Box 15 \ 7 Scan083 | |
| The instrument board and other parts for chassis 19-EX. | 19th Nov 1928 | Box 15 \ 7 Scan084 | |
| Accessories and fittings for a 20-EX Hooper Enclosed Limousine. | 28th Nov 1928 | Box 15 \ 7 Scan085 | |
| The specifications for the accessories on a 19-EX Hooper Sedanca. | 28th Nov 1928 | Box 15 \ 7 Scan086 | |
| Letter to Messrs Hoopers, Coachbuilders, regarding the dispatch of a dashboard unit and other instruments. | 4th Dec 1928 | Box 15 \ 7 Scan087 | |
| Instrument board positions for 'C' type steering and requesting clarification on potential modifications. | 5th Dec 1928 | Box 15 \ 7 Scan088 | |
| Seeking clarification on instrument panel specifications, including colour and features, for various experimental car models. | 12th Dec 1928 | Box 15 \ 7 Scan089 | |
| Sending an instrumentboard control head to Messrs. Hoopers for fitting to an experimental car. | 6th Dec 1928 | Box 15 \ 7 Scan090 | |
| Fitting, ordering, and design of framed instrument patches for experimental cars. | 11th Dec 1928 | Box 15 \ 7 Scan091 | |
| Order for three complete sets of instruments with cream dials, along with red lamps and telegauge units. | 13th Dec 1928 | Box 15 \ 7 Scan092 | |
| Requirement and ordering of instrument sets for experimental and production cars. | 3rd Dec 1928 | Box 15 \ 7 Scan093 | |
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