| Description | Date | Identifier | |
| Design of the instrument board for the 2nd L.H. Chassis (25-EX) to meet USA requirements. | 1st Jul 1930 | Box 19 \ 4 Scan105 | |
| Potential design issue with the conical distance piece on a side spare wheel carrier. | 4th Jul 1930 | Box 19 \ 4 Scan106 | |
| Introduction of special features from the Left-Hand drive chassis onto the English chassis for American and Home production. | 4th Jul 1930 | Box 19 \ 4 Scan107 | |
| Critique of a bumper design and planning a collision test on a second left-hand chassis. | 4th Jul 1930 | Box 19 \ 4 Scan108 | |
| List of special features for the L.H. chassis for American and home production. | 7th Jul 1930 | Box 19 \ 4 Scan109 | |
| List of additional technical features and modifications, including notes on material availability. | 7th Jul 1930 | Box 19 \ 4 Scan110 | |
| Left-Hand Chassis for America and a follow-up on previous correspondence about bumpers. | 7th Jul 1930 | Box 19 \ 4 Scan111 | |
| Instrument board layout for a left-hand drive chassis. | 8th Jul 1930 | Box 19 \ 4 Scan112 | |
| Request to obtain a vehicle license for car chassis 25-EX. | 8th Jul 1930 | Box 19 \ 4 Scan113 | |
| Cooling and steering issues for a sample L.H. Chassis destined for the American market. | 9th Jul 1930 | Box 19 \ 4 Scan114 | |
| List of modifications and material order request for the 40/50 HP Chassis - N.2 Series. | 8th Jul 1930 | Box 19 \ 4 Scan115 | |
| Material delays pending the issue of standardisation sheets for specific parts. | 8th Jul 1930 | Box 19 \ 4 Scan116 | |
| Second report on Brooklands radiator and fuel supply tests. | 9th Jul 1930 | Box 19 \ 4 Scan117 | |
| Analysis of vehicle overheating issues caused by fuel supply problems at high temperatures. | 1st Jul 1930 | Box 19 \ 4 Scan118 | |
| Cooling system fan belt performance and mixture strength analysis at high speeds. | 1st Jul 1930 | Box 19 \ 4 Scan119 | |
| Tests concerning engine over-heating, fuel supply, radiator matrices, and radiator bottom outlets. | 9th Jul 1930 | Box 19 \ 4 Scan120 | |
| Vehicle cooling system circulation and water temperature tests. | 19th Jul 1930 | Box 19 \ 4 Scan121 | |
| Report discussing factors that affect car overheating, including fan efficiency, driving conditions, and cooling system performance. | 19th Jul 1930 | Box 19 \ 4 Scan122 | |
| Recommendations for improvements to the fan belt, autovac, bonnet shutters, and radiator system, with proposed tests on the Phantom II. | 1st Jul 1930 | Box 19 \ 4 Scan123 | |
| Graphical analysis of the effects of fan configuration, speed, and ventilation on the engine cooling system. | 2nd Jul 1930 | Box 19 \ 4 Scan124 | |
| Blank page with a 'Print Room, Derby' stamp in the bottom right corner. | 10th Jul 1930 | Box 19 \ 4 Scan125 | |
| Series of graphs showing the effect of water circulation on overheating in a 19 EX car. | 2nd Jul 1930 | Box 19 \ 4 Scan126 | |
| Graph plotting top and bottom water temperatures against seven different engine cooling configurations during a Brooklands test. | 2nd Jul 1930 | Box 19 \ 4 Scan127 | |
| Graph showing the effect of bottom water temperature on circulation flow and pump suction depression at 2500 engine RPM. | 10th Jul 1930 | Box 19 \ 4 Scan128 | |
| Mostly blank page with a purple receiving stamp in the bottom right corner. | 10th Jul 1930 | Box 19 \ 4 Scan129 | |
| Collision tests for the L.H.Phantom II Chassis bumpers. | 9th Jul 1930 | Box 19 \ 4 Scan130 | |
| Brief typed memo regarding the expected arrival of a second L.H. P.2. chassis. | 1st Jul 1930 | Box 19 \ 4 Scan131 | |
| Alterations to the friction clutches for 45 HP & 25 HP cars and the difficulty in changing gear. | 10th Jul 1930 | Box 19 \ 4 Scan132 | |
| Letter arranging a viewing of the Second Experimental Left-hand Phantom II for feedback on a new radiator bonnet and dash design. | 11th Jul 1930 | Box 19 \ 4 Scan133 | |
| The failure of a modified Phantom II exhaust system's aluminium parts due to heat while running in France. | 14th Jul 1930 | Box 19 \ 4 Scan134 | |
| Tests and faults for the second left-hand chassis 25-EX, including engine 'boom', overheating, and exhaust failure. | 14th Jul 1930 | Box 19 \ 4 Scan135 | |
| The concluding page of a typed memo mentioning a trip to France to meet with Hancox. | 14th Jul 1930 | Box 19 \ 4 Scan136 | |
| Notes on the bonnet, radiator, and external coachwork of a 2nd Experimental L.H. Phantom II - 25-EX car. | 14th Jul 1930 | Box 19 \ 4 Scan137 | |
| Design review of a car's external and internal coachwork, with notes on improvements. | 14th Jul 1930 | Box 19 \ 4 Scan138 | |
| Feedback on car features, including air cushions, interior trim, and chassis components. | 14th Jul 1930 | Box 19 \ 4 Scan139 | |
| Test report on vehicle performance, noting gear shift smoothness and steering, with a suggestion for a new wheel. | 14th Jul 1930 | Box 19 \ 4 Scan140 | |
| The collapse of a front expansion chamber during a 10,000-mile test on a 24-EX Phantom II. | 14th Jul 1930 | Box 19 \ 4 Scan141 | |
| The non-standardised exhaust system for the 24-EX model and the unsuitability of using aluminium. | 15th Jul 1930 | Box 19 \ 4 Scan142 | |
| The instrument board for the experimental car 25-RX, discussing its design, lighting, and alternative finish options. | 16th Jul 1930 | Box 19 \ 4 Scan143 | |
| The standardisation of instrument panel colours versus providing alternatives for different interior treatments. | 18th Jul 1930 | Box 19 \ 4 Scan144 | |
| Approving the standardisation of an altered bonnet and dash for the Second Experimental L.H. Phantom II Car. | 18th Jul 1930 | Box 19 \ 4 Scan145 | |
| Ordering materials and planning production for the left-handed Phantom II chassis for the American market. | 18th Jul 1930 | Box 19 \ 4 Scan146 | |
| Special features for the L.H. Phantom II chassis, particularly concerning American requirements. | 18th Jul 1930 | Box 19 \ 4 Scan147 | |
| The standardisation of an instrument board for a second left-hand drive chassis for America. | 18th Jul 1930 | Box 19 \ 4 Scan148 | |
| Review of a full-size car model, praising its shape and modifications but noting a design flaw with the leading doors. | 9th Jul 1930 | Box 19 \ 4 Scan149 | |
| Telegram recommending testing vehicle 24 EX at Brooklands before a continental run due to troubles. | 19th Jun 1930 | Box 19 \ 4 Scan150 | |
| Holding up material for the instrument board on a second left-hand drive chassis for America. | 21th Jul 1930 | Box 19 \ 4 Scan151 | |
| Test report detailing various faults found on a 25-EX L.H. steering chassis after a 250-mile run. | 21th Jul 1930 | Box 19 \ 4 Scan152 | |
| Brief report on night driving and torque reaction. | 21th Jul 1930 | Box 19 \ 4 Scan153 | |
| Design and standardisation of the bonnet, instrument panel, and front apron for a second Left-Hand drive Phantom II for America. | 21th Jul 1930 | Box 19 \ 4 Scan154 | |
| List of required modifications and repairs for vehicle model 25-EX. | 22th Jul 1930 | Box 19 \ 4 Scan155 | |
| List of modifications and notes on the red lamp, instrument board, subframe, pedals, and undershield. | 22th Jul 1930 | Box 19 \ 4 Scan156 | |
| Alteration to the bonnet and dash for the 'N2' Series chassis. | 22th Jul 1930 | Box 19 \ 4 Scan157 | |
| Bonnet standardisation, instrument boards, and front aprons for the Second L.H. P.2 model for America. | 22th Jul 1930 | Box 19 \ 4 Scan158 | |
| Arguing against the use of wooden subframes for RRAI (Rolls-Royce of America Inc.) due to climatic conditions. | 22th Jul 1930 | Box 19 \ 4 Scan159 | |
| Approving an appearance-based alteration to the bonnet and dash, authorising early material ordering. | 23th Jul 1930 | Box 19 \ 4 Scan160 | |
| From Sg. to Hs. discussing a contract change regarding subframes and a proposed visit to observe Brewster's mounting methods. | 25th Jul 1930 | Box 19 \ 4 Scan161 | |
| Internal memorandum regarding subframes for R.R.A.I. and the Second Experimental Car in America. | 29th Jul 1930 | Box 19 \ 4 Scan162 | |
| Subframe for the L.H. P.II, including vibration issues and a comparison of English and American woodworking. | 28th Jul 1930 | Box 19 \ 4 Scan163 | |
| The concluding page of a letter from Maurice Olley suggesting a resolution to a problem. | 30th Jul 1930 | Box 19 \ 4 Scan164 | |
| Selection of a different type of horn for the American Contract. | 30th Jul 1930 | Box 19 \ 4 Scan165 | |
| Issues and proposed modifications for the 24-EX model after 6,000 miles of testing. | 15th Aug 1930 | Box 19 \ 4 Scan166 | |
| Radiator spillage, shutter action, carburation, and dynamo charging issues. | 15th Aug 1930 | Box 19 \ 4 Scan167 | |
| Material and design changes for a Sump Drain Plug, including a new locking mechanism. | 20th Aug 1930 | Box 19 \ 4 Scan168 | |
| Material compatibility issues with steel sump and sludge plugs in aluminium and duralumin components. | 22th Aug 1930 | Box 19 \ 4 Scan169 | |
| From J.S. requesting the return of a previously sent letter and its reply. | 25th Aug 1930 | Box 19 \ 4 Scan170 | |
| L.H. Phantom II Chassis, covering sub-frames, spare wheels, and blueprints. | 1st Sep 1930 | Box 19 \ 4 Scan171 | |
| The supply of blueprints for a Mr. Beaver. | 2nd Sep 1930 | Box 19 \ 4 Scan172 | |
| The L.E.Phantom II for America, an individual's illness, and an update on component tests. | 2nd Sep 1930 | Box 19 \ 4 Scan173 | |
| Testing of wheels, tyres, and frames for an American contract vehicle. | 25th Jul 1930 | Box 19 \ 4 Scan174 | |
| Tests concerning the subframe mounting on a Left-Hand Phantom II chassis. | 3rd Sep 1930 | Box 19 \ 4 Scan175 | |
| Report discussing the practicalities of using subframes and the standard placement for spare wheels. | 3rd Sep 1930 | Box 19 \ 4 Scan176 | |
| Selection of wheels and tyres for the left-hand drive Phantom II for the American market. | 3rd Sep 1930 | Box 19 \ 4 Scan177 | |
| Supply of horns, clocks, and speedometers for L.R.Phantom II chassis for the American market. | 4th Sep 1930 | Box 19 \ 4 Scan178 | |
| Provision of electric clocks and speedometers for the Left-Hand Phantom II chassis. | 5th Sep 1930 | Box 19 \ 4 Scan179 | |
| Standardisation of chassis parts, specifically an improved oil drain plug. | 15th Jul 1930 | Box 19 \ 4 Scan180 | |
| Unresolved issues with the Phantom II Left Hand Chassis following road tests. | 9th Sep 1930 | Box 19 \ 4 Scan181 | |
| Modifications to the clutch, carburetter, and brakes for experimental cars. | 9th Sep 1930 | Box 19 \ 4 Scan182 | |
| Financial allowances for non-supplied parts on the L.H.Phantom II Chassis for the American market. | 9th Sep 1930 | Box 19 \ 4 Scan183 | |
| Letter discussing the supply of horns, clocks, and speedometers for the Left-handed Phantom II Chassis for America. | 9th Sep 1930 | Box 19 \ 4 Scan184 | |
| Letter regarding the pricing of components and a request for instructions following a visit. | 9th Sep 1930 | Box 19 \ 4 Scan185 | |
| Reporting a delay in the bumper test for a left-hand chassis due to inadequate tackle. | 10th Sep 1930 | Box 19 \ 4 Scan186 | |
| Finalization, approval, and transport of a 25-EX Left-Hand Chassis to America. | 11th Sep 1930 | Box 19 \ 4 Scan187 | |
| Recommending an increase in the number of adjustment notches for the hand brake lever on a left-hand chassis. | 11th Sep 1930 | Box 19 \ 4 Scan188 | |
| Letter discussing the pricing of the 20/25 model for the American market, referencing specific chassis prices and markups. | 11th Sep 1930 | Box 19 \ 4 Scan189 | |
| Letter discussing selling price, profit, and lack of internal support for the 20/25 car model project. | 11th Sep 1930 | Box 19 \ 4 Scan190 | |
| Letter discussing manufacturing chassis for the American market and the viability of the 20/25 model. | 11th Sep 1930 | Box 19 \ 4 Scan191 | |
| Fan belt measurements for a left-hand chassis. | 15th Sep 1930 | Box 19 \ 4 Scan192 | |
| Results of bumper tests for the American market. | 16th Sep 1930 | Box 19 \ 4 Scan193 | |
| Special points and specifications for the Phantom II chassis for the American market. | 17th Sep 1930 | Box 19 \ 4 Scan194 | |
| List of special points and modifications for a Left-hand Steering Phantom II Chassis for R.R.A.I. | 21th May 1930 | Box 19 \ 4 Scan195 | |
| Required increased movement for a hand brake lever on a left-hand chassis. | 17th Sep 1930 | Box 19 \ 4 Scan196 | |
| Requesting an update on the status of the 25-EX L.H. Chassis. | 19th Sep 1930 | Box 19 \ 4 Scan197 | |
| Issues with the 25-EX L.H. chassis, specifically noise, coachwork, gearing, and thermostat settings for the U.S. market. | 20th Sep 1930 | Box 19 \ 4 Scan198 | |
| Outlining points for discussion regarding an upcoming visit to America concerning car testing, contracts, and acceptance procedures. | 22th Sep 1930 | Box 19 \ 4 Scan199 | |
| Outlining questions and a proposed itinerary for a business trip to the U.S.A. | 22th Sep 1930 | Box 19 \ 4 Scan200 | |
| Modifications to the L.H. Phantom change gear mechanism to resolve a rattle issue. | 22th Sep 1930 | Box 19 \ 4 Scan201 | |
| Brief memo from Sg. to Hs. arranging a meeting to discuss an American Visit. | 23th Sep 1930 | Box 19 \ 4 Scan202 | |
| The specifications and modifications for a left-hand drive chassis intended for the American market. | 25th Sep 1930 | Box 19 \ 4 Scan203 | |
| Specifications for wheels, tyres, bumpers, headlamp brackets, finishes, and radiator shutters. | 25th Sep 1930 | Box 19 \ 4 Scan204 | |
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