| Description | Date | Identifier | |
| Correspondence regarding the acquisition of Citroen parts, an invitation for the T.T. race, and thanks for a report on alloy bearings. | 28th Jul 1936 | Box 128 \ 1 scan0249 | |
| Confirming arrangements to mock-up Citroen front suspension parts using a scrap Bentley frame and sheet aluminium. | 4th Aug 1936 | Box 128 \ 1 scan0250 | |
| Decline in sales of higher-priced cars, American market trends, and potential competition from General Motors. | 21th Aug 1936 | Box 128 \ 1 scan0251 | |
| Extract from 'Automotive Industries' comparing passenger car production by wholesale price for 1936 and 1935. | 8th Aug 1936 | Box 128 \ 1 scan0252 | |
| Secret memo discussing alarming American car sales statistics and their relevance to the Wraith model. | 25th Aug 1936 | Box 128 \ 1 scan0253 | |
| Enquiry from the Board of Customs regarding the import of parts for experimental purposes. | 7th Sep 1936 | Box 128 \ 1 scan0254 | |
| Confirming that parts from Paris are being used solely for experimental purposes on experimental chassis. | 8th Sep 1936 | Box 128 \ 1 scan0255 | |
| Presenting a statistical breakdown of automotive industry figures by price bracket for 1935 and 1936. | 15th Oct 1936 | Box 128 \ 1 scan0256 | |
| Letter from Alvis Ltd. enclosing their 1937 sales literature, with handwritten internal notes regarding reciprocation. | 12th Nov 1936 | Box 128 \ 1 scan0257 | |
| Letter to Alvis Car & Engineering Co., Ltd. requesting an instruction book for a 4.3-litre Alvis in exchange for a 4¼-Litre Bentley instruction book. | 19th Nov 1936 | Box 128 \ 1 scan0258 | |
| Letter from Alvis Ltd acknowledging receipt of a Bentley catalogue and advising their 4.3 Litre instruction book is being compiled. | 20th Nov 1936 | Box 128 \ 1 scan0259 | |
| Attached catalogue and an offer to borrow an 'extraordinary little motorcar'. | 9th Jan 1937 | Box 128 \ 1 scan0260 | |
| From 'Rm' discussing a potential test drive of an 'Aprilia' car. | 11th Jan 1937 | Box 128 \ 1 scan0261 | |
| Requesting to test drive an Aprilia car while on a trip to London. | 11th Jan 1937 | Box 128 \ 1 scan0262 | |
| American automobile production statistics from 1936. | 12th Jan 1937 | Box 128 \ 1 scan0263 | |
| Letter from the Experimental Department thanking The Universal Car Co. for the loan of an 8-HP Ford engine. | 18th Jan 1937 | Box 128 \ 1 scan0264 | |
| Arranging to borrow and test an Aprilia car, suggesting loaning a Phantom III in return. | 19th Jan 1937 | Box 128 \ 1 scan0265 | |
| Letter to the Standard Motor Co. to arrange a visit to their works and discuss engineering design. | 21th Jan 1937 | Box 128 \ 1 scan0266 | |
| Letter from The Standard Motor Co. Ltd. acknowledging a letter and explaining a delay due to staff absence. | 22th Jan 1937 | Box 128 \ 1 scan0267 | |
| Letter to W.A. Robotham arranging a visit for Mr. R. Royce, suggesting Thursday is a more convenient day. | 22th Jan 1937 | Box 128 \ 1 scan0268 | |
| Letter to The Standard Motor Co. arranging a visit for Mr. Royce and Mr. Eccles to view machine tool equipment. | 23th Jan 1937 | Box 128 \ 1 scan0269 | |
| Lp. to Rm. regarding the delayed delivery of Hindmarsh's car. | 23th Jan 1937 | Box 128 \ 1 scan0270 | |
| Letter from Frank B. Halford to W. A. Robotham concerning an incorrect advertisement about RR.56 rods and discussing Junkers' use of light alloys. | 25th Jan 1937 | Box 128 \ 1 scan0271 | |
| Letter from The Standard Motor Co. Ltd. arranging a visit and plant tour for Mr. Robotham and colleagues. | 25th Jan 1937 | Box 128 \ 1 scan0272 | |
| Letter to W.A. Robotham regarding travel arrangements for a meeting in Coventry. | 25th Jan 1937 | Box 128 \ 1 scan0273 | |
| Letter to Major F.B. Halford regarding tests on R.R.56 rods on a Bentley engine. | 26th Jan 1937 | Box 128 \ 1 scan0274 | |
| Letter to The Standard Motor Co. Ltd. confirming a lunch meeting for the 28th of January. | 26th Jan 1937 | Box 128 \ 1 scan0275 | |
| Letter from Hindmarsh, past work on a Frazer Nash steering, and the loan of an Aprillia car. | 27th Jan 1937 | Box 128 \ 1 scan0276 | |
| Letter on Hawker Aircraft Ltd. letterhead giving feedback on a Bentley's steering and discussing other personal matters. | 20th Jan 1937 | Box 128 \ 1 scan0277 | |
| Vehicle directional instability, heavy control, and brake judder. | 28th Jan 1937 | Box 128 \ 1 scan0278 | |
| Letter to Captain Black of Standard Motor Co., Ltd. thanking him for a factory visit. | 28th Jan 1937 | Box 128 \ 1 scan0279 | |
| Letter to Alvis Car & Engineering Co., Ltd. thanking them for the instruction book for their 4.3 litre car. | 2nd Apr 1937 | Box 128 \ 1 scan0280 | |
| Road test report for the Hillman '80' Limousine from 'THE MOTOR' magazine. | 1st Jun 1937 | Box 128 \ 1 scan0281 | |
| Road test and performance review of the Hillman '80' Limousine from 'The Motor' magazine. | 1st Jun 1937 | Box 128 \ 1 scan0282 | |
| Opportunity to examine a sectioned chassis of a super-charged 5 litre 540 Type Mercedes at an exhibition. | 3rd Nov 1937 | Box 128 \ 1 scan0283 | |
| Technical observations from a visit to the Lagonda Works. | 8th Nov 1937 | Box 128 \ 1 scan0284 | |
| Extract from 'Automotive Industries' regarding a General Motors dividend announcement. | 6th Nov 1937 | Box 128 \ 1 scan0285 | |
| Extract from an automotive magazine detailing Chrysler's quarterly financial results. | 6th Nov 1937 | Box 128 \ 1 scan0286 | |
| Financial statement comparing cash holdings, inventories, and depreciation charges. | 23th Nov 1937 | Box 128 \ 1 scan0287 | |
| United States car production statistics for the first six months of 1937. | 23th Nov 1937 | Box 128 \ 1 scan0288 | |
| Statistical table showing U.S. new car registrations and estimated dollar volume by retail price classes. | 11th Sep 1937 | Box 128 \ 1 scan0289 | |
| Table of new passenger car registrations comparing data for various manufacturers between 1936 and 1937. | 11th Sep 1937 | Box 128 \ 1 scan0290 | |
| Comparative sales report for major US auto manufacturers for the years 1936 and 1937. | 11th Sep 1937 | Box 128 \ 1 scan0291 | |
| U.S. new car registrations and estimated dollar volume by retail price classes for July. | 11th Sep 1937 | Box 128 \ 1 scan0292 | |
| Correcting misinformation regarding sales figures and prices of 27 HP Humber cars. | 1st Dec 1937 | Box 128 \ 1 scan0293 | |
| Clarifying car registration figures, noting an error in previous data and difficulties in obtaining specific make information. | 4th Dec 1937 | Box 128 \ 1 scan0294 | |
| List of car manufacturers categorized by horsepower over 25 for the year 1937. | 3rd Dec 1937 | Box 128 \ 1 scan0295 | |
| List of car manufacturers with models over 25 horsepower for the year 1936. | 3rd Dec 1937 | Box 128 \ 1 scan0296 | |
| Statistical table of new private car registrations in Great Britain, categorized by horsepower class, for years ending September 1927 to 1937. | 30th Sep 1937 | Box 128 \ 1 scan0297 | |
| Car policy, referencing a 1936 journal article on automobile design in Great Britain. | 6th Dec 1937 | Box 128 \ 1 scan0298 | |
| Complaint from Lagonda Motors about disparaging remarks and the required staff response. | 18th Dec 1937 | Box 128 \ 1 scan0299 | |
| Cover note for an enclosed memo received from 'AA' regarding a 12-cylinder Lagonda. | 31th Dec 1937 | Box 128 \ 1 scan0300 | |
| Test drive report and critique of a 12-cylinder Lagonda, comparing it to a 4 1/4 Bentley. | 24th Dec 1937 | Box 128 \ 1 scan0301 | |
| Test drive report offering an opinion on a car's gearbox, brakes, and its potential as a competitor to the 4 1/4 Bentley. | 4th Feb 1938 | Box 128 \ 1 scan0302 | |
| Letter from Morris Motors Ltd. thanking Mr. Robotham for his hospitality and offering assistance. | 4th Feb 1938 | Box 128 \ 1 scan0303 | |
| The production of drawings for Packard and Oldsmobile suspensions. | 15th Feb 1938 | Box 128 \ 1 scan0304 | |
| Letter to Morris Motors Ltd. regarding cylinder bore wear with thin oil. | 23th Feb 1938 | Box 128 \ 1 scan0305 | |
| From Rm to RHC regarding a reciprocal visit to Morris Motors' Coventry Works to discuss marine motors. | 23th Feb 1938 | Box 128 \ 1 scan0306 | |
| Request to arrange for a Studebaker with remote control gear change to be brought to the Derby works for evaluation. | 28th Feb 1938 | Box 128 \ 1 scan0307 | |
| Letter from Morris Motors Ltd. to W.A. Robotham regarding a visit and research into cylinder bore wear. | 9th Mar 1938 | Box 128 \ 1 scan0308 | |
| Letter to W.R. Boyle of Morris Motors Ltd. arranging a visit to the Commercial Works. | 10th Mar 1938 | Box 128 \ 1 scan0309 | |
| Letter from Morris Motors Ltd. postponing a proposed visit due to an office relocation and clarifying the correct branch to visit. | 11th Mar 1938 | Box 128 \ 1 scan0310 | |
| Notification from the Morris Motors Engines Branch regarding their change of address and new telephone number. | 14th Mar 1938 | Box 128 \ 1 scan0311 | |
| Letter to Morris Motors discussing the combustion chamber design of a 25 HP Wolseley engine and questioning its performance. | 15th Mar 1938 | Box 128 \ 1 scan0312 | |
| Letter from Morris Motors discussing the combustion chamber design of a Wolseley 25HP engine. | 19th Mar 1938 | Box 128 \ 1 scan0313 | |
| Letter from Studebaker comparing the merits of nine-bearing and five-bearing crankshafts. | 21th Mar 1938 | Box 128 \ 1 scan0314 | |
| Letter from the Studebaker Corporation discussing the comparative merits of nine-bearing and five-bearing crankshafts. | 21th Mar 1938 | Box 128 \ 1 scan0315 | |
| Page two of a letter from S.W. Sparrow, a Research Engineer for The Studebaker Corporation. | 24th Mar 1938 | Box 128 \ 1 scan0316 | |
| Letter to Morris Motors Ltd. arranging a meeting to discuss a combustion chamber job. | 24th Mar 1938 | Box 128 \ 1 scan0317 | |
| Follow-up letter to Morris Motors discussing a recent visit, an experimental tail bearing, and engine design feedback. | 1st Apr 1938 | Box 128 \ 1 scan0318 | |
| Blueprint detailing a roller bearing on a 1st motion shaft for a 20HP engine, including modifications. | 1st Apr 1913 | Box 128 \ 1 scan0319 | |
| Letter from Morris Motors discussing the cost of cylinder head and block castings and the possibility of making gears. | 5th Apr 1938 | Box 128 \ 1 scan0320 | |
| Letter to Morris Motors Ltd. discussing the manufacturing costs of valves and gearboxes. | 7th Apr 1938 | Box 128 \ 1 scan0321 | |
| Page 2 of a letter to W.R. Boyle discussing gear manufacturing and comparing side valve vs overhead valve engines. | 7th Apr 1938 | Box 128 \ 1 scan0322 | |
| Data table comparing performance characteristics of various American car models. | 22th Apr 1938 | Box 128 \ 1 scan0323 | |
| Letter detailing the cost breakdown and material specification for valves. | 22th Apr 1938 | Box 128 \ 1 scan0324 | |
| Letter from Morris Motors Ltd. concerning the forging of valves and the comparative costs of gear grinding versus shaving. | 22th Apr 1938 | Box 128 \ 1 scan0325 | |
| Cost of a valve compared to an external quotation. | 25th Apr 1938 | Box 128 \ 1 scan0326 | |
| Letter to Morris Motors Ltd. interpreting performance figures and comparing engine types. | 28th Apr 1938 | Box 128 \ 1 scan0327 | |
| Visit to Talbot showrooms to inspect a 3 Litre Talbot and record its weights and prices for project B.3. | 5th May 1938 | Box 128 \ 1 scan0328 | |
| Letter to Morris Motors Ltd. requesting engine manufacturing information and discussing piston components. | 14th May 1938 | Box 128 \ 1 scan0329 | |
| Table showing American car sales for 1936 and 1937, sourced from 'The Motor Trader'. | 9th Mar 1938 | Box 128 \ 1 scan0330 | |
| Letter from Morris Motors detailing the man-hours to machine and assemble a 25HP engine. | 23th May 1938 | Box 128 \ 1 scan0331 | |
| Letter from Morris Motors discussing manufacturing costs, gearboxes, pistons, and engine component tests. | 23th May 1938 | Box 128 \ 1 scan0332 | |
| Letter from Morris Motors regarding the development of a concentric valve engine. | 23th May 1938 | Box 128 \ 1 scan0333 | |
| Letter to Morris Motors discussing the costs of 'Bought Out' parts and concentric valve engines. | 23th May 1938 | Box 128 \ 1 scan0334 | |
| Page two of a letter to W.R. Boyle, Esq. discussing single-cylinder engine work, alloys and carburettors. | 24th May 1938 | Box 128 \ 1 scan0335 | |
| Letter from Morris Motors discussing the cost breakdown of a 25HP engine and their purchasing advantages. | 27th May 1938 | Box 128 \ 1 scan0336 | |
| Page two of a letter from Morris Motors discussing supplier relationships and a proposed visit. | 27th May 1938 | Box 128 \ 1 scan0337 | |
| Letter to W.R. Boyle of Morris Motors Ltd. acknowledging a previous letter and an upcoming visit. | 30th May 1938 | Box 128 \ 1 scan0338 | |
| Letter to W.R. Boyle of Morris Motors Ltd. asking for an opinion on the Flower Piston. | 30th Jun 1938 | Box 128 \ 1 scan0339 | |
| Letter from Morris Motors commenting on the performance of Flower Pistons. | 1st Jun 1938 | Box 128 \ 1 scan0340 | |
| Letter from Morris Motors Ltd. regarding their inability to supply experimental 'Plowen' pistons. | 8th Jun 1938 | Box 128 \ 1 scan0341 | |
| Letter to W.O. Bentley of Lagonda Motors requesting a test drive of a 12-cylinder car. | 15th Jun 1938 | Box 128 \ 1 scan0342 | |
| Request to arrange a test of two Studebaker cars with different gear change and overdrive systems. | 15th Jun 1938 | Box 128 \ 1 scan0343 | |
| Letter from coachbuilders Hooper & Co. to S.H. Grylls arranging the arrival of two cars, one of which is a second-hand 1937 model. | 17th Jun 1938 | Box 128 \ 1 scan0344 | |
| Letter to F.L. Manning of Hooper & Co. arranging a meeting concerning Studebakers. | 20th Jun 1938 | Box 128 \ 1 scan0345 | |
| Thank you letter to F.L. Manning of Messrs. Hooper & Co. regarding runs on Studebaker cars. | 23th Jun 1938 | Box 128 \ 1 scan0346 | |
| Letter to W.O. Bentley of Lagonda Motors, expressing admiration for a car and engine. | 23th Jun 1938 | Box 128 \ 1 scan0347 | |
| Road test and assessment of a 12-cylinder Lagonda car, including comparisons to a Phantom III model. | 23th Jun 1938 | Box 128 \ 1 scan0348 | |
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