| Description | Date | Identifier | |
| Servicing of Derby-built cars in America. | 18th Feb 1931 | Box 19 \ 4 Scan305 | |
| Observed defects and issues with a new U.S.A. chassis model. | 27th Feb 1931 | Box 19 \ 4 Scan306 | |
| Findings on suction noise, power reduction due to an inlet silencer, and gearbox noise levels. | 27th Feb 1931 | Box 19 \ 4 Scan307 | |
| Graduated markings and minimum level indication for a crankcase oil indicator on a left-hand chassis. | 3rd Mar 1931 | Box 19 \ 4 Scan308 | |
| Request from the US office for a characteristic power curve for the L.H. PII engine. | 1st Apr 1931 | Box 19 \ 4 Scan309 | |
| Graph comparing engine horsepower (HP) against revolutions per minute (R.P.M.) under two different test conditions. | 4th May 1931 | Box 19 \ 4 Scan310 | |
| Letter to Burton at Rolls-Royce America Inc. regarding left-hand drive cars, Delco shock absorbers, and radiator tubes. | 4th May 1931 | Box 19 \ 4 Scan311 | |
| Letter detailing the decision to switch from magneto to battery-only ignition in future cars. | 4th May 1931 | Box 19 \ 4 Scan312 | |
| Letter sent to the US branch regarding a blueprint of the power curve for a Phantom II chassis. | 4th May 1931 | Box 19 \ 4 Scan313 | |
| Graph plotting horsepower against RPM, comparing a water brake test with a dynamometer test at the road wheels. | 4th May 1931 | Box 19 \ 4 Scan314 | |
| Blank page with a purple ink stamp in the bottom right corner. | 4th May 1931 | Box 19 \ 4 Scan315 | |
| Letter discussing management changes, PII body production, chassis inventory, and component sourcing. | 25th May 1931 | Box 19 \ 4 Scan316 | |
| Component issues with Delco shock absorbers and Lucas lamps, and initial road tests of the new PII suspension. | 25th May 1931 | Box 19 \ 4 Scan317 | |
| Performance issues, including lack of low-speed power and steering wobble, with proposed solutions and competitor comparisons. | 25th May 1931 | Box 19 \ 4 Scan318 | |
| Comparison of competitor vehicle specifications regarding wheel sizes, axle ratios, and engine performance, discussing potential design changes. | 25th May 1931 | Box 19 \ 4 Scan319 | |
| Vehicle performance, axle ratios, and the advent of free-wheeling and automatic transmissions. | 25th May 1931 | Box 19 \ 4 Scan320 | |
| Letter discussing engine and transmission development, including the PII model, automatic gears, and the Schneider Trophy. | 18th May 1931 | Box 19 \ 4 Scan321 | |
| Letter from Winchester Repeating Arms Company discussing the supply of radiator tubes and manufacturing equipment. | 18th May 1931 | Box 19 \ 4 Scan322 | |
| Letter from Winchester Repeating Arms Co. to Mr. A.C. Ross suggesting a meeting in Springfield. | 18th May 1921 | Box 19 \ 4 Scan323 | |
| Letter from Winchester Repeating Arms Company discussing options for supplying radiator tube manufacturing equipment to Derby, England. | 18th May 1931 | Box 19 \ 4 Scan324 | |
| Test drive and performance impressions of car 202-AJS. | 25th May 1931 | Box 19 \ 4 Scan325 | |
| Road test report of a Phantom II car detailing performance, handling, and comfort characteristics. | 25th May 1931 | Box 19 \ 4 Scan326 | |
| Road test report detailing vehicle performance, comfort, and identified faults. | 24th Feb 1931 | Box 19 \ 4 Scan327 | |
| Graph plotting finished car weight against piston displacement for various vehicles. | 24th Feb 1931 | Box 19 \ 4 Scan328 | |
| Owner feedback from J.P. Morgan regarding a starter failure and design suggestions for a Phantom II chassis. | 21th May 1931 | Box 19 \ 4 Scan329 | |
| Feedback from a chauffeur and Mr. Morgan on car performance and components. | 21th May 1931 | Box 19 \ 4 Scan330 | |
| Initial feedback and impressions on the left-hand drive Phantom II model from the Springfield plant. | 4th Jun 1931 | Box 19 \ 4 Scan331 | |
| Letter discussing modifications to the Phantom II, the status of 'H' aero engines, and car improvements like a new gearbox. | 25th Jun 1931 | Box 19 \ 4 Scan332 | |
| Cover note forwarding a supplementary report on the U.S.A. motor industry from the D.O.T. Special Service of Information. | 10th Aug 1931 | Box 19 \ 4 Scan333 | |
| Department of Overseas Trade report on the US motor industry's production figures for the first half of 1931. | 7th Aug 1931 | Box 19 \ 4 Scan334 | |
| Market analysis of the US automotive industry, focusing on competition, sales trends, and new models. | 7th Aug 1931 | Box 19 \ 4 Scan335 | |
| Chrysler's business activities, new car development, and competition with Ford and Chevrolet. | 7th Aug 1931 | Box 19 \ 4 Scan336 | |
| Summary of new Packard models and a Society of Automotive Engineers meeting discussing car design. | 7th Aug 1931 | Box 19 \ 4 Scan337 | |
| Table of production figures in units of cars for various American auto companies from February to May 1931. | 7th Aug 1931 | Box 19 \ 4 Scan338 | |
| Comparison table of production figures for various American car manufacturers over four months. | 7th Aug 1931 | Box 19 \ 4 Scan339 | |
| Table comparing the production output of Packard, REO, Studebaker, and Willys-Overland over four months. | 17th Aug 1931 | Box 19 \ 4 Scan340 | |
| Overheating on an L.H. P.11, highlighting a confusion regarding bonnet shutters. | 17th Aug 1931 | Box 19 \ 4 Scan341 | |
| Letter from Rolls-Royce of America concerning overheating issues with L.H. Phantom II cars during hot weather. | 5th Aug 1931 | Box 19 \ 4 Scan342 | |
| Overheating issues with L.H. Phantom II cars in the U.S.A. and potential cooling solutions. | 21th Aug 1931 | Box 19 \ 4 Scan343 | |
| Letter from the Chief Engineer in Springfield to Mr. Hives in Derby regarding the status of 'H' engines in the USA. | 22th Aug 1931 | Box 19 \ 4 Scan344 | |
| Handling of a valuable file requested by the American Service Department. | 28th Aug 1931 | Box 19 \ 4 Scan345 | |
| Letter discussing the business situation at the Springfield plant and developments in the 25 HP model. | 28th Aug 1931 | Box 19 \ 4 Scan346 | |
| Information to the R.R.A.I. service depot. | 29th Aug 1931 | Box 19 \ 4 Scan347 | |
| Amended contract with an American company, reducing a chassis order and outlining revised terms. | 2nd Sep 1931 | Box 19 \ 4 Scan348 | |
| Letter discussing car performance issues, specifically engine sluggishness and carburettor settings on the PII model. | 15th Sep 1931 | Box 19 \ 4 Scan349 | |
| Letter discussing business challenges, staffing cuts, and the Schneider Trophy. | 2nd Sep 1931 | Box 19 \ 4 Scan350 | |
| Questioning the carburetor settings for cars in the USA. | 5th Oct 1931 | Box 19 \ 4 Scan351 | |
| Letter to A.E. Ross at the Springfield, U.S.A. factory expressing sympathy and requesting photographs and feedback on Phantom II cars. | 3rd Oct 1931 | Box 19 \ 4 Scan352 | |
| Phantom II complaints and sending Sports Car details to the American market. | 4th Nov 1931 | Box 19 \ 4 Scan353 | |
| Letter from the American branch to the UK regarding Phantom-II cars, the Croyden coachwork, and chassis issues. | 20th Oct 1931 | Box 19 \ 4 Scan354 | |
| Phantom II complaints, photographs of Continental models for the American market, and coachbuilder relations. | 4th Nov 1931 | Box 19 \ 4 Scan355 | |
| Confirming a letter has been sent to Mr. Ross with an attached copy. | 11th Nov 1931 | Box 19 \ 4 Scan356 | |
| Letter to Rolls-Royce of America providing feedback on car body designs from the Coachbuilding Sub-Committee. | 11th Nov 1931 | Box 19 \ 4 Scan357 | |
| Comparison of American car body design features against their own, focusing on pillars, ventilators, hinges, and wings. | 11th Nov 1931 | Box 19 \ 4 Scan358 | |
| Proposed itinerary of places to visit in the U.S.A. | 18th Dec 1931 | Box 19 \ 4 Scan359 | |
| Letter to A. Ross Esq. regarding a planned visit by staff to the USA plants. | 18th Dec 1931 | Box 19 \ 4 Scan360 | |
| Short memo confirming that a personal letter will be written following a visit to the United States. | 19th Dec 1931 | Box 19 \ 4 Scan361 | |
| Letter from the Vice President of the American branch announcing his departure and new position. | 4th Jan 1932 | Box 19 \ 4 Scan362 | |
| Letter regarding a personnel change and arrangements for a visit from UK staff. | 8th Jan 1932 | Box 19 \ 4 Scan363 | |
| Visit to the U.S.A. in March 1932, reviewing the American automobile industry. | 31th Mar 1932 | Box 19 \ 4 Scan364 | |
| Report page on the performance of 12-cylinder American cars and recent technical advancements by General Motors. | 31th Mar 1932 | Box 19 \ 4 Scan365 | |
| Report comparing engine specifications and manufacturing practices with American competitors. | 31th Mar 1932 | Box 19 \ 4 Scan366 | |
| American automobile manufacturing practices, component outsourcing, production scale, and economic conditions. | 31th Mar 1932 | Box 19 \ 4 Scan367 | |
| Automotive market trends and technical developments in brakes, cooling, and steering. | 31th Mar 1932 | Box 19 \ 4 Scan368 | |
| Technical report discussing clutch operation, suspension progress, and developments in easy-change gearboxes. | 31th Mar 1932 | Box 19 \ 4 Scan369 | |
| Automotive technology developments, including rubber bonding, free wheels, engine mountings, and fuel improvements. | 31th Mar 1932 | Box 19 \ 4 Scan370 | |
| American automotive developments covering fuel, chassis, engine, and design trends. | 31th Mar 1932 | Box 19 \ 4 Scan371 | |
| Car requirements for the American market, comparing performance and considering a new smaller model. | 31th Mar 1932 | Box 19 \ 4 Scan372 | |
| Diagrams of a new muffler design, an exhaust tuning chamber, and a gearbox shaft assembly. | 8th Apr 1932 | Box 19 \ 4 Scan373 | |
| Organizational chart of the General Motors engineering and research divisions. | 24th Mar 1932 | Box 19 \ 4 Scan374 | |
| Cover letter forwarding remaining particulars and prints following discussions in Springfield. | 14th Apr 1932 | Box 19 \ 4 Scan375 | |
| Information bulletin regarding modifications for left-hand drive P.2 cars in America. | 14th Apr 1932 | Box 19 \ 4 Scan376 | |
| Instructions for modifying radiator mountings, engine feet clearance, and frame dampers to resolve movement and vibration issues. | 9th Apr 1932 | Box 19 \ 4 Scan377 | |
| Despatch note for sending experimental parts to R.R. of America Inc. for testing on L.H. cars. | 9th Apr 1932 | Box 19 \ 4 Scan378 | |
| Isolated customer complaints of booming, radiator jellying, and poor carburation. | 19th Apr 1932 | Box 19 \ 4 Scan379 | |
| Information for dealing with left-hand drive cars in America, covering engine mounts and thermostats. | 19th Apr 1932 | Box 19 \ 4 Scan380 | |
| Instructions for resolving radiator movement, engine mounting clearance, and updating friction material. | 2nd May 1932 | Box 19 \ 4 Scan381 | |
| Letter from Rolls-Royce of America regarding technical issues with 'Booming' and radiator movement discussed with Mr. W.A. Robotham. | 2nd May 1932 | Box 19 \ 4 Scan382 | |
| Steering 'jagger' issue in Left-hand Phantom II cars for the Canadian market. | 14th Dec 1932 | Box 19 \ 4 Scan383 | |
| Steering shock ('jagger') on Left-Hand Phantom II cars and the potential cost of improvements. | 19th Dec 1932 | Box 19 \ 4 Scan384 | |
| Letter from the American branch to the English branch regarding an issue with glazed servo liners on PII cars. | 16th Feb 1933 | Box 19 \ 4 Scan385 | |
| Letter to Rolls-Royce of America regarding the procedure for restoring glazed servo linings. | 28th Feb 1933 | Box 19 \ 4 Scan386 | |
| Supply of updated L.H.Phantom II chassis to the American Company, considering engine and gearbox modifications. | 16th Nov 1933 | Box 19 \ 4 Scan387 | |
| American market, potential risks, and required chassis modifications for left-hand drive. | 16th Nov 1933 | Box 19 \ 4 Scan388 | |
| Numbered list of 20 vehicle modifications and features for enclosure. | 16th Nov 1935 | Box 19 \ 4 Scan389 | |
| Possibilities of creating a left-hand drive Phantom II for the American market by modifying the existing gearbox. | 29th Nov 1933 | Box 19 \ 4 Scan390 | |
| Request to arrange insurance for Phantom car 18-EX and its driver, F. Dodd, for a trip to France. | 7th Dec 1928 | Box 19 \ 5 Scan001 | |
| Memo from France regarding arrival, the status of car 14.EX, and a future meeting. | 15th Oct 1928 | Box 19 \ 5 Scan002 | |
| Request for a report on the K.S. petrol gauge's overnight performance during hot weather in France. | 21th Jan 1929 | Box 19 \ 5 Scan003 | |
| To Mr. Dodd about sending a special spanner for removing a valve cap on the rear dampers. | 9th Apr 1929 | Box 19 \ 5 Scan004 | |
| Letter from Dodd to Hives regarding a departure from France being delayed due to adverse weather. | 9th Apr 1929 | Box 19 \ 5 Scan005 | |
| Broken O.S.R shock damper and proposed temporary repair. | 17th Apr 1929 | Box 19 \ 5 Scan006 | |
| Letter regarding Mr. Royce's health and travel arrangements. | 16th Jul 1929 | Box 19 \ 5 Scan007 | |
| Final preparations for chassis 18-MX, including its delivery to London, resolving body rattles, and arranging a mechanic for a demonstration. | 16th Jul 1929 | Box 19 \ 5 Scan008 | |
| Letter on hotel stationery detailing steering modifications and feedback. | 21th Jul 1929 | Box 19 \ 5 Scan009 | |
| On Red Lion Hotel letterhead regarding vehicle modifications and travel plans. | 21th Jul 1929 | Box 19 \ 5 Scan010 | |
| 166-mile road test with positive feedback on the car's performance and springing compared to the Phantom. | 22th Jul 1929 | Box 19 \ 5 Scan011 | |
| Feedback and required adjustments for car 18-EX after a publicity run. | 25th Jul 1929 | Box 19 \ 5 Scan012 | |
| Responding to criticisms regarding car 18-EX, covering issues with coachwork, speedometer, and steering. | 29th Jul 1929 | Box 19 \ 5 Scan013 | |
| Page two of a memorandum discussing a technical suggestion for loading a side-steering-tube. | 14th Sep 1929 | Box 19 \ 5 Scan014 | |
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