| Description | Date | Identifier | |
| Blueprint detailing a section of a mechanical assembly with curved components. | 1st May 1914 | Box 170 \ 1 img012 | |
| Blueprint showing geometric layouts and circular patterns. | 3rd Nov 1938 | Box 170 \ 1 img013 | |
| Blueprint detailing the specifications for a valve hole on a circular component. | 3rd Nov 1938 | Box 170 \ 1 img014 | |
| Performance graph for a Lagonda V12 engine with an air silencer fitted under specific backpressure conditions. | 28th Nov 1937 | Box 170 \ 1 img015 | |
| Letter to Lagonda Motors discussing the weight and performance characteristics of the Phantom III engine unit. | 17th Jan 1938 | Box 170 \ 1 img016 | |
| Letter from Templewood Engineering Co. Ltd. proposing a scheme for developing light alloy brake drums. | 30th Jun 1938 | Box 170 \ 1 img017 | |
| Letter to S. H. Grylls, Esq. discussing solders, temple construction, and a failed experimental test. | 14th Jan 1960 | Box 170 \ 1 img018 | |
| Letter to S.S. Tresilian of Templewood Engineering regarding sending drums and liners, and mentioning a 12-cylinder Lagonda. | 1st Jul 1938 | Box 170 \ 1 img019 | |
| Request to despatch two Bentley brake drums and two liners to Templewood Engineering Co. for special assembly. | 13th Jul 1938 | Box 170 \ 1 img020 | |
| Letter to Templewood Engineering regarding the process of gluing a liner into an aluminium drum. | 13th Jul 1938 | Box 170 \ 1 img021 | |
| Letter from Paul Quinn Ltd. regarding rubber-mounted flywheels and synthetic rubber gaskets. | 6th Sep 1938 | Box 170 \ 1 img022 | |
| Letter from Paul Quinn Ltd to S. H. Grylls about the production of cheaper gaskets and tinning cast iron brake drums. | 6th Sep 1938 | Box 170 \ 1 img023 | |
| Cross-sectional drawing of a mechanical assembly featuring a 'Hibudine' bonded element. | 6th Sep 1938 | Box 170 \ 1 img024 | |
| Blueprint of a cross-section for a rubber-mounted component. | 6th Sep 1938 | Box 170 \ 1 img025 | |
| Blueprint of a circular spoked mechanical component. | 25th Oct 1938 | Box 170 \ 1 img026 | |
| Blueprint of a spoked circular component. | 25th Oct 1938 | Box 170 \ 1 img027 | |
| Inquiry to Messrs. Paul Quinn, Ltd. regarding the feasibility and material properties of mounting a flywheel on rubber. | 8th Sep 1938 | Box 170 \ 1 img028 | |
| Letter from Templewood Engineering Co. Ltd. regarding the testing of forged magnesium pistons and making experimental forgings. | 20th Oct 1938 | Box 170 \ 1 img029 | |
| Letter from Paul Quinn Ltd. concerning a rough scheme for mounting a flywheel on rubber bushes. | 20th Oct 1938 | Box 170 \ 1 img030 | |
| Letter from Paul Quinn Ltd. discussing a heat-resistant material for flywheel and clutch applications. | 20th Oct 1938 | Box 170 \ 1 img031 | |
| Letter to Templewood Engineering Co., Ltd. discussing the trial of forged magnesium pistons and comparing piston designs. | 26th Oct 1938 | Box 170 \ 1 img032 | |
| Letter regarding an alternative flywheel construction scheme using bonded 'Hibudine' synthetic rubber. | 31th Oct 1938 | Box 170 \ 1 img033 | |
| Cross-sectional blueprint of a mechanical assembly with material and function annotations. | 31th Oct 1938 | Box 170 \ 1 img034 | |
| Blueprint showing a cross-section of a mechanical component and joint assembly. | 1st Nov 1938 | Box 170 \ 1 img035 | |
| Letter to Paul Quain Ltd. discussing two alternative schemes for a flexible flywheel. | 1st Nov 1938 | Box 170 \ 1 img036 | |
| Diagrammatic sketch of a detachable wheel part, suggesting a modification for moulding. | 1st Feb 1937 | Box 170 \ 1 img037 | |
| Letter to Templewood Engineering Co., Ltd. discussing issues with aluminium brake drums and potential solutions. | 1st Nov 1938 | Box 170 \ 1 img038 | |
| Letter to Templewood Engineering Co., Ltd. regarding interference fits when casting an aluminium drum around an iron liner. | 1st Nov 1938 | Box 170 \ 1 img039 | |
| Letter from Templewood Engineering Co. Ltd. discussing light alloy piston and brake drum manufacturing. | 9th Nov 1938 | Box 170 \ 1 img040 | |
| Letter discussing light alloy pressing techniques for car body work and proposed experiments with Park Ward. | 9th Nov 1938 | Box 170 \ 1 img041 | |
| Letter discussing drawings for pistons and a potential collaboration on aluminium body construction with Park Ward. | 11th Nov 1938 | Box 170 \ 1 img042 | |
| Letter to S.S. Tresilian regarding pressing and the status of brake drum drawings. | 11th Nov 1938 | Box 170 \ 1 img043 | |
| Letter from Templewood Engineering Co. Ltd. to W. A. Robotham regarding developments in aluminium body construction. | 29th Nov 1938 | Box 170 \ 1 img044 | |
| Letter to S.S. Tresilian of Templewood Engineering Co., Ltd. arranging a meeting. | 1st Dec 1938 | Box 170 \ 1 img045 | |
| Letter to S.S. Tresilian of Templewood Engineering Co. rescheduling a meeting to discuss a Side Valve exponent. | 6th Dec 1938 | Box 170 \ 1 img046 | |
| Letter from the Experimental Department to Templewood Engineering Co. regarding two arrangement drawings. | 7th Dec 1938 | Box 170 \ 1 img047 | |
| Letter from Templewood Engineering arranging a meeting to see Prestwichs and discuss body-building. | 7th Dec 1938 | Box 170 \ 1 img048 | |
| Short letter to S.S. Tresilian of Templewood Engineering confirming a meeting at Park Wards. | 9th Dec 1938 | Box 170 \ 1 img049 | |
| Information sheet detailing the weights of an 'M' Series Aerolite piston and Bentley connecting rod. | 13th Dec 1938 | Box 170 \ 1 img050 | |
| Letter providing information on Duralumin connecting rods, including testing results and future design considerations. | 13th Dec 1938 | Box 170 \ 1 img051 | |
| Disagreement over magnesium piston drawings and proposing a collaboration. | 18th Jan 1939 | Box 170 \ 1 img052 | |
| Letter detailing drawings for new magnesium pistons and connecting rods, outlining design changes and anticipated weight savings. | 18th Jan 1939 | Box 170 \ 1 img053 | |
| Continuation of a letter to W. A. Robotham regarding piston and connecting rod design, materials, and stress analysis. | 18th Jan 1939 | Box 170 \ 1 img054 | |
| Letter discussing connecting rod design, materials, and production considerations. | 18th Jan 1939 | Box 170 \ 1 img055 | |
| Letter to W. A. Robotham discussing piston production, brake drum experiments, and a light alloy body framework. | 18th Jan 1939 | Box 170 \ 1 img056 | |
| Blueprint showing a cross-section and side view of an engine piston. | 18th Jan 1939 | Box 170 \ 1 img057 | |
| Blueprint showing an inverted plan view and a cross-section of a circular component. | 18th Jan 1939 | Box 170 \ 1 img058 | |
| Blueprint drawing of a piston showing a full view and a cross-section view. | 18th Jan 1939 | Box 170 \ 1 img059 | |
| Blueprint drawing showing a cross-section of a piston. | 18th Jan 1939 | Box 170 \ 1 img060 | |
| Blueprint displaying sectional views (A.A, B.B, C.C) of a circular component. | 22th Feb 1935 | Box 170 \ 1 img061 | |
| Blueprint drawing of a Magnesium Alloy Piston. | 22th Feb 1935 | Box 170 \ 1 img062 | |
| Letter discussing the design, testing, and costs of connecting rods and pistons. | 19th Jan 1939 | Box 170 \ 1 img063 | |
| Request from Templewood Engineering for a standard Bentley chassis drawing to create a wooden dummy for a Park Ward body frame. | 25th Jan 1939 | Box 170 \ 1 img064 | |
| Letter to S.S. Tresilian of Templewood Engineering Co. regarding a coach builder's drawing for a Bentley chassis. | 1st Feb 1939 | Box 170 \ 1 img065 | |
| Letter addressing an allegation of an information leak concerning a new streamline Bentley model. | 15th Mar 1939 | Box 170 \ 1 img066 | |
| Private letter addressing an information leak about a projected motor-car and a subsequent inquest. | 23th Mar 1939 | Box 170 \ 1 img067 | |
| Letter to S.S. Tresilian concerning responsibility for an information leak. | 23th Mar 1939 | Box 170 \ 1 img068 | |
| Letter to S.S. Tresilian of Templewood Engineering regarding the use of aerolite magnesium pistons to reduce weight. | 24th Mar 1939 | Box 170 \ 1 img069 | |
| Letter from Templewood Engineering regarding delays to a work programme, factory changes, and progress on brake drum testing. | 25th May 1939 | Box 170 \ 1 img070 | |
| Continuation of a letter to W. A. Robotham discussing developments with cast iron liners and magnesium pistons. | 25th May 1939 | Box 170 \ 1 img071 | |
| Letter to S.S. Tresilian of Armstrong Siddeley Motors discussing personal matters, post-war aluminium prices, and by-pass filters for Merlin engines. | 12th Dec 1939 | Box 170 \ 1 img072 | |
| Letter to S.S. Tresilian regarding an expert on filtration and an invitation to the factory. | 12th Dec 1939 | Box 170 \ 1 img073 | |
| Letter from Armstrong Siddeley Motors discussing oil filter research, the future of aluminium and magnesium in transport, and project delays due to the war. | 14th Dec 1939 | Box 170 \ 1 img074 | |
| Graph plotting Brake Horsepower and Brake Mean Effective Pressure, comparing performance with test bed silencers versus road silencers. | 14th Dec 1939 | Box 170 \ 1 img075 | |
| Performance graph comparing the B.M.E.P. of a B.80 engine and a 12 Cylinder Lagonda engine. | 30th Jun 1940 | Box 170 \ 1 img076 | |
| Graph comparing the Brake Mean Effective Pressure (B.M.E.P.) of a Bentley B80 engine against a 12-cylinder Lagonda engine. | 30th Jun 1940 | Box 170 \ 1 img077 | |
| Performance and petrol consumption test results comparing a Duplex Stromberg and 3 SU carburettors on a Bentley 11 BI car. | 30th May 1940 | Box 170 \ 1 img078 | |
| Constant speed petrol consumption tests, detailing issues encountered and comparing results with a Lagonda. | 30th May 1940 | Box 170 \ 1 img079 | |
| Comparison of fuel consumption figures between Stromberg and 3 SU carburettors, including road test data and engine setup details. | 30th May 1940 | Box 170 \ 1 img080 | |
| Vehicle test parameters including rear axle ratio, tyre size, and fuel type. | 2nd Oct 1940 | Box 170 \ 1 img081 | |
| Competitor publicity from Lagonda and suggesting a counter-publicity effort. | 2nd Oct 1940 | Box 170 \ 1 img082 | |
| Article from 'The Motor' magazine detailing a road test of a V12 Lagonda titled 'Trial by Jury'. | 18th Sep 1940 | Box 170 \ 1 img083 | |
| Magazine page from 'The Motor' detailing wartime automotive accessories and services, including blackout light masks, gas conversions, and instalment plans for overhauls. | 18th Sep 1940 | Box 170 \ 1 img084 | |
| Magazine article from 'The Motor' detailing a road test of a 100 m.p.h. car. | 18th Sep 1940 | Box 170 \ 1 img085 | |
| Road test article titled 'Trial By Jury' from 'The Motor' magazine, reviewing a Lagonda car. | 18th Sep 1940 | Box 170 \ 1 img086 | |
| Article from 'The Autocar' magazine reviewing a twelve-cylinder Lagonda of the latest type. | 20th Sep 1940 | Box 170 \ 1 img087 | |
| Page from a 1940 motoring magazine with articles on wartime motoring activities and a general knowledge quiz. | 20th Sep 1940 | Box 170 \ 1 img088 | |
| Continued magazine article from 'The Autocar' reviewing a Lagonda car's performance and handling. | 20th Sep 1940 | Box 170 \ 1 img089 | |
| Page from 'The Autocar' magazine featuring a collection of short articles and anecdotes titled 'Disconnected Jottings'. | 20th Sep 1940 | Box 170 \ 1 img090 | |
| Magazine article from 'The Motor' featuring a 12-cylinder Lagonda with a Lancefield streamline body. | 25th Sep 1940 | Box 170 \ 1 img091 | |
| Page from 'The Motor' magazine, issue 157, featuring news articles on wartime motoring conditions. | 25th Sep 1940 | Box 170 \ 1 img092 | |
| Article from 'The Autocar' magazine describing a special streamlined twelve-cylinder Lagonda saloon with a four-carburettor engine. | 27th Sep 1940 | Box 170 \ 1 img093 | |
| Page from 'The Autocar' magazine featuring reader queries and replies on topics including crashed speedometers, tyre replacements, and specific car model experiences. | 27th Sep 1940 | Box 170 \ 1 img094 | |
| Article from 'The Autocar' magazine about a special streamlined Lagonda twelve-cylinder car. | 27th Sep 1940 | Box 170 \ 1 img095 | |
| Advertisement for the Bentley 'Silent Sports Car' from 'The Autocar' magazine. | 27th Sep 1940 | Box 170 \ 1 img096 | |
| Page of advertisements from 'The Autocar' magazine for battery chargers and tyre pressure equipment. | 27th Sep 1940 | Box 170 \ 1 img097 | |
| Competitor publicity from Lagonda and suggesting opportunities for press on their own products. | 4th Oct 1940 | Box 170 \ 1 img098 | |
| Letter discussing the Streamline Bentley, a rival 12-cylinder Lagonda, and competition at the Motor Show. | 1st Oct 1940 | Box 170 \ 1 img099 | |
| Page from 'The Motor' magazine featuring a Lagonda V12 with a Lancefield streamlined body and an article on fluid drive systems in American cars. | 25th Sep 1940 | Box 170 \ 1 img100 | |
| Motoring news page from 1940 covering wartime measures for drivers, including petrol allowances, car modifications, and tyre recycling. | 25th Sep 1940 | Box 170 \ 1 img101 | |
| Streamlined Lagonda's body design and recent publicity, comparing it to a Bentley. | 4th Oct 1940 | Box 170 \ 1 img102 | |
| Timing and strategy for releasing publicity about the B V model and other vehicles. | 10th Oct 1940 | Box 170 \ 1 img103 | |
| Letter from Cadillac Motor Car Company requesting to see drawings of two R.R. joints for the Phantom and 25 HP models. | 30th Dec 1930 | Box 170 \ 2 img001 | |
| Telegraphic enquiry from Hives in Detroit to Mr. Olley in Springfield regarding the presence of 'quick step valves' on a specific chassis. | 9th Dec 1930 | Box 170 \ 2 img002 | |
| Telegram concerning a patent inquiry from General Motors about the import of Quick Step Steel and the delivery of aero engines to the US government. | 9th Dec 1930 | Box 170 \ 2 img003 | |
| Intelligence gathering on competitor parts and a potential patent infringement issue. | 15th Jan 1931 | Box 170 \ 2 img004 | |
| Reciprocal information exchange, the Quickstep Steel matter, and mechanics' joints. | 14th Jan 1939 | Box 170 \ 2 img005 | |
| Letter to Cadillac discussing Quick-step steel, Delco dampers, universal joints and vehicle ride quality issues like springing and frame 'jellying'. | 17th Jan 1930 | Box 170 \ 2 img006 | |
| Letter discussing the Delco Generator, a potential purchase of a twelve-cylinder car, and the state of the aero engine business. | 21th Feb 1931 | Box 170 \ 2 img007 | |
| Letter from the Experimental Department to Cadillac Motor Car Co. discussing Delco shock absorbers and steering wobble. | 21th Feb 1931 | Box 170 \ 2 img008 | |
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