| Description | Date | Identifier | |
| Cablegram recommending the Packard scheme using rubber for wishbone suspensions as an alternative to threaded shackles. | 12th Mar 1937 | Box 174 \ 2 img028 | |
| Telegram regarding threaded shackle suspension design and the use of rubber to eliminate noise. | 12th Mar 1937 | Box 174 \ 2 img029 | |
| Telegram received by telephone recommending to proceed with a Packard scheme as an alternative. | 12th Mar 1937 | Box 174 \ 2 img030 | |
| Cable from the USA regarding threaded shackles and recommending the Packard suspension scheme as an alternative. | 13th Mar 1937 | Box 174 \ 2 img031 | |
| Cablegram discussing clutch and suspension issues and proposing alterations. | 13th Mar 1937 | Box 174 \ 2 img032 | |
| Message about a position dictated by no frame alteration, requesting information on spring seating and end coiling. | 13th Mar 1937 | Box 174 \ 2 img033 | |
| Letter discussing overdrive, gearbox endurance testing, and suspension noise concerns. | 13th Mar 1937 | Box 174 \ 2 img034 | |
| Technical memorandum discussing improvements to dampers, suspension, and cylinder head design. | 13th Mar 1937 | Box 174 \ 2 img035 | |
| Engine design choices, volumetric efficiency, and miscellaneous business. | 13th Mar 1937 | Box 174 \ 2 img036 | |
| Requesting assistance in hiring a reliable chauffeur for Mr. Jack Mead's three-week visit. | 22th Mar 1937 | Box 174 \ 2 img037 | |
| Confirming a request to send notes on engine altitude ratings to the Wright Aero Corporation. | 22th Mar 1937 | Box 174 \ 2 img038 | |
| Comparing a Chevrolet radiator matrix unit with a Marston Bentley matrix, and requesting further details on fans and air conditioning. | 22th Mar 1937 | Box 174 \ 2 img039 | |
| Development updates on Wraith suspension and engine noise, and the arrival of a Continental Phantom III body. | 22th Mar 1937 | Box 174 \ 2 img040 | |
| Progress and issues with various automotive components and models. | 22th Mar 1937 | Box 174 \ 2 img041 | |
| Requesting that copies of all memos circulated from the U.S.A. be provided to Lp. | 23th Mar 1937 | Box 174 \ 2 img042 | |
| Requesting a 25/30 piston and comparing the weight of rear road springs and hubs against Cadillac and Bentley models. | 23th Mar 1937 | Box 174 \ 2 img043 | |
| Copy of a telegram discussing suspension design, spring positioning, rubber bushings, and damper types. | 23th Mar 1937 | Box 174 \ 2 img044 | |
| Letter requesting a 25/30 piston and discussing the weight of various components like springs and bearings, with comparisons to Cadillac and Bentley parts. | 23th Mar 1937 | Box 174 \ 2 img045 | |
| Seeking clarification on a request for information for the Wright Aeronautical Corporation. | 24th Mar 1937 | Box 174 \ 2 img046 | |
| Table of weights for various parts of the 1937 Buick Series '40', '60', '80', and '90' models. | 24th Mar 1937 | Box 174 \ 2 img047 | |
| Telegram discussing high-speed misfiring issues with ceramic and mica plugs, and recommending AC type K4 plugs. | 24th Sep 1927 | Box 174 \ 2 img048 | |
| Telegram received by telephone from Detroit regarding engine trouble and ratings in America. | 10th May 1932 | Box 174 \ 2 img049 | |
| Inter-departmental memorandum answering questions on threaded shackles, shock damper noise, spring anchorage, weights, and exhaust systems. | 25th Mar 1937 | Box 174 \ 2 img050 | |
| Cablegram from the United States regarding trouble with ceramic spark plugs and high-speed misfiring. | 25th Mar 1937 | Box 174 \ 2 img051 | |
| Western Union telegram discussing casting porosity, timings, and material composition. | 26th Mar 1934 | Box 174 \ 2 img052 | |
| Telegram detailing material specifications and foundry instructions. | 1st Jan 1919 | Box 174 \ 2 img053 | |
| Telegram detailing engine block casting specifications and production data. | 1st Jan 1919 | Box 174 \ 2 img054 | |
| Telegram regarding the inability to locate individuals named Johnson and Broom. | 27th Mar 1937 | Box 174 \ 2 img055 | |
| Letter on Detroit Athletic Club letterhead regarding a strike, 15,000-mile tests, and parts. | 27th Mar 1937 | Box 174 \ 2 img056 | |
| Memo discussing improvements to cylinder casting, engine components, and the Wraith gearbox. | 27th Mar 1937 | Box 174 \ 2 img057 | |
| Visit to the Buick Foundry to investigate cylinder porosity and compare cylinder block construction. | 27th Mar 1937 | Box 174 \ 2 img058 | |
| Technical document detailing engine core venting methods and dimensions, with a comparison to Buick's production techniques. | 27th Mar 1937 | Box 174 \ 2 img059 | |
| Notes and a diagram regarding the casting and venting of a water jacket core for an Oldsmobile 6-cylinder engine. | 27th May 1937 | Box 174 \ 2 img060 | |
| Foundry instructions for iron casting, including material compositions and core mixtures. | 27th Mar 1937 | Box 174 \ 2 img061 | |
| Cylinder head casting issues, solutions, and foundry production statistics from Buick. | 26th May 1937 | Box 174 \ 2 img062 | |
| Report from H.S. Royce in Detroit detailing observations on American automotive factory control, organization, and production methods. | 26th May 1937 | Box 174 \ 2 img063 | |
| Potentiometer method for measuring the amount of sodium in engine valves. | 27th Mar 1937 | Box 174 \ 2 img064 | |
| Visit to the National Broach Company regarding gear manufacture and forging methods. | 27th Mar 1937 | Box 174 \ 2 img065 | |
| Continuation of a report on a visit to National Broach Co. concerning gear manufacturing processes. | 27th Mar 1937 | Box 174 \ 2 img066 | |
| Detailed description of the gear shaving machine process, including cutter specifications and tooth form generation. | 27th Mar 1937 | Box 174 \ 2 img067 | |
| Description and diagram of gear testers, specifically the helix angle tester and the involute form tester. | 27th Mar 1937 | Box 174 \ 2 img068 | |
| Technical document detailing noise testing procedures for gears and the manufacturing process for splines. | 27th Mar 1937 | Box 174 \ 2 img069 | |
| Investigation into contact lines on helical gears using celluloid models and stress analysis. | 27th Mar 1937 | Box 174 \ 2 img070 | |
| Churchill's gear equipment and its use by other car manufacturers. | 27th May 1937 | Box 174 \ 2 img071 | |
| Visit to Federal Mogul regarding a new high conductivity bronze alloy for cylinder heads. | 27th May 1937 | Box 174 \ 2 img072 | |
| Page of notes referencing individuals and companies for information on cast-in copper fins and plates. | 30th Mar 1937 | Box 174 \ 2 img073 | |
| Letter from General Motors Export Division regarding the shipment of Delco shock absorbers and fluid. | 30th Mar 1937 | Box 174 \ 2 img074 | |
| Copy of a cablegram detailing instructions for metal casting processes and material composition. | 26th May 1937 | Box 174 \ 2 img075 | |
| Copy of a cablegram correcting the carbon content for Buick iron for the Wraith suspension. | 31th Mar 1937 | Box 174 \ 2 img076 | |
| Arrangement of a temporary driver for Mr. George Mead of Pratt & Witneys. | 1st Apr 1937 | Box 174 \ 2 img077 | |
| Letter discussing the hiring of a driver, issues with the Wraith model's suspension and noise, and development costs for a new cylinder block. | 2nd Apr 1937 | Box 174 \ 2 img078 | |
| Short memo confirming travel arrangements for Webb and Mead in New York. | 2nd Apr 1937 | Box 174 \ 2 img079 | |
| Confirming arrangements for a driver to meet Mr. George Mead upon his boat's arrival. | 2nd Apr 1937 | Box 174 \ 2 img080 | |
| Comparing the weights of Cadillac 60 & 70 series body parts. | 4th Apr 1937 | Box 174 \ 2 img081 | |
| Car design issues, torsional crank problems, harmonic damper testing, and Wraith wheel movement. | | Box 174 \ 2 img082 | |
| Letter from 'Rm' in New York with instructions about travel arrangements and office painting. | | Box 174 \ 2 img083 | |
| Visit to the Wilcox-Rich Saginaw valve tappet plant to investigate their hydraulic tappets. | 4th Apr 1937 | Box 174 \ 2 img084 | |
| Cover memo for a copy of a letter dated March 23rd. | 5th Apr 1937 | Box 174 \ 2 img085 | |
| Request to send a 25/30 piston assembly to the Cadillac Motor Car Company in Detroit. | 5th Apr 1937 | Box 174 \ 2 img086 | |
| Cablegram from Robotham concerning damper pistons and an office painting request. | 6th Apr 1937 | Box 174 \ 2 img087 | |
| Dispatch of one piston to the Cadillac Car Co. in Detroit, U.S.A. | 6th Apr 1937 | Box 174 \ 2 img088 | |
| To Gryls regarding an official order to be sent to the Buick Motor Company for 40 Cores and a sample cylinder block. | 8th Apr 1937 | Box 174 \ 2 img089 | |
| Cover memo for a note received from 'E' in the U.S.A. for internal distribution. | 10th Apr 1937 | Box 174 \ 2 img090 | |
| Visit to the Buick Foundry to investigate cylinder porosity and design. | 27th Mar 1937 | Box 174 \ 2 img091 | |
| Diagram and explanation of venting passages in an engine core, with notes on Buick's practices. | 27th Mar 1937 | Box 174 \ 2 img092 | |
| The water jacket core for an Oldsmobile 6 cylinder engine, detailing its venting system and casting procedure. | 27th Mar 1937 | Box 174 \ 2 img093 | |
| Page detailing foundry practices for metal casting, including material specifications and process controls. | 27th Mar 1937 | Box 174 \ 2 img094 | |
| Resolving cylinder head casting porosity and foundry production data from Buick and Oldsmobile. | 10th Apr 1937 | Box 174 \ 2 img095 | |
| Invoice from Harrison Radiator Division for various car parts and requesting payment instructions. | 10th Apr 1937 | Box 174 \ 2 img096 | |
| Requesting an order to be sent to Harrison Radiator Division for various parts. | 12th Apr 1937 | Box 174 \ 2 img097 | |
| To Mr. Grylls requesting an update on Mr. Mead's arrival to prepare Driver Webb. | 12th Apr 1937 | Box 174 \ 2 img098 | |
| Mr. Mead's arrival in Southampton on the Berengaria. | 13th Apr 1937 | Box 174 \ 2 img099 | |
| Copy of a cablegram recommending to proceed with an eye beam open cruciform member for the Wraith frame. | 13th Apr 1937 | Box 174 \ 2 img100 | |
| Telegram received by telephone, detailing a test communication from Hucknall. | 4th Jan 1917 | Box 174 \ 2 img101 | |
| Telegram received by telephone regarding pressure tests, scuffing and phosphating. | 10th Mar 1937 | Box 174 \ 2 img102 | |
| Letter from General Filters, Inc. detailing the composition of filter cartridges being sent for testing. | 12th Apr 1937 | Box 174 \ 2 img103 | |
| Cover memo for an attached report received from H.R. Royce. | 3rd Apr 1937 | Box 174 \ 2 img104 | |
| Report from H.A. Royce in Cleveland, Ohio, concerning foundry visits, materials, and processes. | 11th Apr 1937 | Box 174 \ 2 img105 | |
| Illustrating two methods of welding to prevent cracking at stressed welds. | 11th Apr 1937 | Box 174 \ 2 img106 | |
| Hardening processes and lead bronze bearings, including a lead/copper phase diagram. | 11th Apr 1937 | Box 174 \ 2 img107 | |
| Lead attack on steels and comparing knowledge with General Motors and Ethyl Export. | 22th Apr 1937 | Box 174 \ 2 img108 | |
| Letter from Inland Manufacturing Division concerning permissible loadings and hardness specifications for Inlox Bushings. | 22th Apr 1937 | Box 174 \ 2 img109 | |
| Concluding page of a letter to Mr. W. A. Robotham from the Sales Department. | 22th Apr 1937 | Box 174 \ 2 img110 | |
| On an investigation into over-oiling issues in Cadillac overhead valve engines and the solutions they implemented. | 25th Apr 1937 | Box 174 \ 2 img111 | |
| Engine component modifications, oil supply control, and comparisons with Cadillac's hydraulic tappet scheme. | 26th Apr 1937 | Box 174 \ 2 img112 | |
| Letter confirming travel and accommodation arrangements for a visit to Derby. | 26th Apr 1937 | Box 174 \ 2 img113 | |
| Letter from Bendix Products Corporation confirming the shipment of AA-2 and AA-25 carburetors. | 26th Apr 1937 | Box 174 \ 2 img114 | |
| Letter from J. S. Inskip, Inc. concerning the clutch condition of Propaganda Car P-III. | 26th Apr 1937 | Box 174 \ 2 img115 | |
| Short memo requesting to be included in the distribution of notes on Aero matters following a visit to the U.S.A. | 28th Apr 1937 | Box 174 \ 2 img116 | |
| Telex communication to Inskip in New York about improving delivery for Gray. | 30th Apr 1937 | Box 174 \ 2 img117 | |
| Letter from Harrison Radiator Division of General Motors offering to supply thermostats. | 13th Apr 1937 | Box 174 \ 2 img118 | |
| Cablegram confirming the cancellation of a message. | 24th Apr 1937 | Box 174 \ 2 img119 | |
| Analysis of the American car market, comparing models across price points, features, and performance against other vehicles. | 3rd May 1937 | Box 174 \ 2 img120 | |
| The performance of the Phantom III model in the U.S.A., with comparisons to American cars. | 3rd May 1937 | Box 174 \ 2 img121 | |
| Test report on the Phantom III model covering engine smoothness, oiling, coachwork, and performance compared to American cars. | 3rd May 1937 | Box 174 \ 2 img122 | |
| Chassis components including the radiator, cooling, coachwork, heating, suspension, and shock absorbers. | 3rd May 1937 | Box 174 \ 2 img123 | |
| Engine design choices, comparing components and practices with American manufacturers. | 3rd May 1937 | Box 174 \ 2 img124 | |
| Summary of recommendations for testing and implementing new automotive components including dampers, filters, pistons, clutches, and gearboxes. | 3rd May 1937 | Box 174 \ 2 img125 | |
| Report comparing vehicle components to American counterparts and suggesting design improvements. | 3rd May 1937 | Box 174 \ 2 img126 | |
| Potential tests and investigations into various vehicle components and accessories. | 5th May 1937 | Box 174 \ 2 img127 | |
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