| Description | Date | Identifier | |
| Design updates and specifications for the E.A.C.I. model. | 27th Nov 1925 | Box 71 \ 3 scan0190 | |
| Arrangement of the spare wheel carrier and side filler on the petrol tank for the EAC.1 chassis. | 27th Nov 1925 | Box 71 \ 3 scan0191 | |
| Complete specification for a D.TYPE, 9.EX.-CHASSIS, passed to test in November 1925. | 10th Dec 1925 | Box 71 \ 3 scan0192 | |
| List of vehicle components with their corresponding part numbers and specifications. | 10th Dec 1925 | Box 71 \ 3 scan0193 | |
| List of part specifications and drawing references for various vehicle components. | 10th Dec 1925 | Box 71 \ 3 scan0194 | |
| Typed list of vehicle component specifications and associated part numbers. | 10th Dec 1925 | Box 71 \ 3 scan0195 | |
| List of specifications and modifications for the 6.EAG.II engine unit components. | 10th Dec 1925 | Box 71 \ 3 scan0196 | |
| List of engine components with associated reference numbers and modification details. | 10th Dec 1925 | Box 71 \ 3 scan0197 | |
| List of parts related to controls and electrical components with their corresponding reference numbers. | 10th Dec 1925 | Box 71 \ 3 scan0198 | |
| Breakdown of the weights for the rear axle and springs of a car. | 26th Jan 1926 | Box 71 \ 3 scan0199 | |
| Delays in fitting hydraulic dampers and a sequence starter to a Phantom with semi-elliptic rear springs. | 22th Jun 1926 | Box 71 \ 3 scan0200 | |
| Listing new and modified parts fitted to a test vehicle, with corresponding drawing and part numbers. | 5th Jul 1926 | Box 71 \ 3 scan0201 | |
| Bringing car EAC-1 to location WW to fit hydraulic dampers and deliver modified axle forgings. | 13th Jul 1926 | Box 71 \ 3 scan0202 | |
| Updates and specifications for front shock absorbers, front axle, and sequence starters. | 20th Jul 1926 | Box 71 \ 3 scan0203 | |
| Modifications to the rear brakes and servo mechanism for chassis 9.EX. | 16th Jun 1927 | Box 71 \ 3 scan0204 | |
| Delay in providing a New Phantom car for the Instruction School. | 25th Aug 1925 | Box 71 \ 3 scan0205 | |
| The results of experiments with footwarmers for Chassis 2 LW, owned by Lord Herbert Scott. | 15th Aug 1919 | Box 71 \ 3 scan0206 | |
| Request from Lord Herbert Scott to fit a heater to Chassis 2 LW. | 7th Aug 1919 | Box 71 \ 3 scan0207 | |
| Proposal to conduct running tests of new pieces on Mr. Hanbury's car. | 16th Oct 1919 | Box 71 \ 3 scan0208 | |
| Road-holding and steering difficulties with a 'Trials Landaulette' and other vehicles. | 22th Jan 1920 | Box 71 \ 3 scan0209 | |
| Road handling and stability issues of a Trials Landaulette car, including planned modifications. | 28th Jan 1921 | Box 71 \ 3 scan0210 | |
| Personal opinion on the road-holding characteristics of a car at high speeds, with planned comparisons to Lanchester and Lancia models. | 22th Jan 1920 | Box 71 \ 3 scan0211 | |
| Handling and steering difficulties with a trials landaulette. | 1st Dec 1920 | Box 71 \ 3 scan0212 | |
| Handling issues and proposed modifications for a Trials Landaulette. | 23th Jan 1920 | Box 71 \ 3 scan0213 | |
| Continuation page of a report questioning if a certain condition is a peculiarity of Rolls-Royce or common to all high-speed cars. | 22th Jan 1920 | Box 71 \ 3 scan0214 | |
| Investigation of faulty steering on trials car 1.LW, its potential causes, and proposed solutions. | 26th Jan 1920 | Box 71 \ 3 scan0215 | |
| Unstable steering tests, particularly when running on tram lines, with discussion on the effect of rear and split springs. | 26th Jan 1920 | Box 71 \ 3 scan0216 | |
| Experiments on a Trials Landaulette to diagnose a steering issue potentially caused by the split rear springs. | 28th Jan 1920 | Box 71 \ 3 scan0217 | |
| Arranging steering tests on a Trials Landaulette, emphasizing the need for dry road conditions. | 2nd Feb 1920 | Box 71 \ 3 scan0218 | |
| Vehicle suspension tests regarding split springs, clips, and the effect on lateral flexibility, steering, and body roll. | 9th Feb 1920 | Box 71 \ 3 scan0219 | |
| Starter failure on chassis 19-LW, due to a slipping starter drive clutch caused by oil contamination. | 9th Feb 1920 | Box 71 \ 3 scan0220 | |
| Solution for an issue with a drive mechanism, suggesting adding holes or grooves to friction faces. | 23th Feb 1920 | Box 71 \ 3 scan0221 | |
| Arrangements for a trials car demonstration in the South of France to address performance criticisms. | 23th Feb 1920 | Box 71 \ 3 scan0222 | |
| Taking a trials car to the South of France to address performance criticisms from Lord Rocksavage. | 23th Feb 1920 | Box 71 \ 3 scan0223 | |
| Potential issue where rear shock absorbers may foul the mudguard stays on a London Trials Landaulette. | 2nd Feb 1920 | Box 71 \ 3 scan0224 | |
| Trial arrangements for cars 19-LW and 1.LW fitted with rear shock absorbers. | 25th Feb 1920 | Box 71 \ 3 scan0225 | |
| To stop the slotting of inner plates on shock absorbers pending the results of further tests. | 1st Mar 1920 | Box 71 \ 3 scan0226 | |
| Letter discussing the results of road tests on cars 1.LW and 19-LW fitted with shock absorbers, noting issues with noise and clearance. | 3rd Feb 1920 | Box 71 \ 3 scan0227 | |
| Noise issue with new rear shock absorbers on a trials car and proposing a solution. | 2nd Mar 1920 | Box 71 \ 3 scan0228 | |
| Using a sheet of asbestos for heat insulation under the floorboards of the 10,000 Miles Trial Car. | 16th Mar 1920 | Box 71 \ 3 scan0229 | |
| Typed letter responding to several customer complaints regarding vehicle noises and a radiator leak for a 19.LW model. | 14th Apr 1920 | Box 71 \ 3 scan0230 | |
| Follow-up report on diagnosing mechanical faults with a car's slipper drive, crankshaft and side shaft. | 6th Aug 1919 | Box 71 \ 3 scan0231 | |
| The specifications for special bedded rear springs for a trials car. | 17th Apr 1920 | Box 71 \ 3 scan0232 | |
| Letter discussing a spring squeaking issue on the Open Trials Car and coordinating a repair. | 17th Apr 1920 | Box 71 \ 3 scan0233 | |
| To Mr. Northey outlining three different types of road springs to be tested. | 19th Apr 1920 | Box 71 \ 3 scan0234 | |
| Quoting a report from 'PN' regarding complaints and potential fixes for the Open Trials Car X.262. | 21th Apr 1920 | Box 71 \ 3 scan0235 | |
| Mr. Horlick's complaint and a proposed solution involving altering a trials car's steering. | 5th May 1920 | Box 71 \ 3 scan0236 | |
| Visit with Mr. Horlick to discuss a steering modification on a trials car. | 7th May 1920 | Box 71 \ 3 scan0237 | |
| Follow-up memo regarding the supply of non-split type rear springs for PN's trials car. | 27th May 1920 | Box 71 \ 3 scan0238 | |
| Note on noisy dynamo and speedometer drives and recommendations for dynamo belts. | 17th Jul 1920 | Box 71 \ 3 scan0239 | |
| Extract from a report on chassis trials, covering springs, steering, body, and floorboards. | 17th Jul 1920 | Box 71 \ 3 scan0240 | |
| Fitting a new low-geared axle and a Smith dynamo to cars for feedback before standardisation. | 22th Jul 1920 | Box 71 \ 3 scan0241 | |
| Report comparing fitters' work on the petrol system of experimental cars 6.EX and 1.EX, noting issues with the hand air pump. | 23th Aug 1920 | Box 71 \ 3 scan0242 | |
| Negative impact of longer scuttles on chassis accessibility and proposing an alternative design for windscreen placement. | 23th Aug 1920 | Box 71 \ 3 scan0243 | |
| Potential causes and solutions for poor vehicle acceleration. | 9th Sep 1920 | Box 71 \ 3 scan0244 | |
| Page of notes on troubleshooting engine performance, discussing ignition timing, compression, fuel, and external drag factors. | 9th Sep 1920 | Box 71 \ 3 scan0245 | |
| The testing, modification, and deployment of five different Smith Type 2D dynamos. | 4th Sep 1920 | Box 71 \ 3 scan0246 | |
| Horsepower and acceleration issues of the post-war car compared to the pre-war model. | 10th Sep 1920 | Box 71 \ 3 scan0247 | |
| Engine performance comparing high and low compression, addressing over-lubrication issues, and proposing piston modifications. | 10th Sep 1920 | Box 71 \ 3 scan0248 | |
| The performance comparison of pre-war and post-war cars, focusing on gear ratios, tyre sizes, and engine tuning. | 10th Sep 1920 | Box 71 \ 3 scan0249 | |
| Letter discussing a plan to test a No.14 Peto & Radford battery on an Open Trials car. | 22th Dec 1920 | Box 71 \ 3 scan0250 | |
| Supply and testing of a Peto & Radford battery and other experimental parts. | 31th Dec 1920 | Box 71 \ 3 scan0251 | |
| Response regarding the supply of a battery case, battery testing, and component preferences. | 6th Jan 1921 | Box 71 \ 3 scan0252 | |
| Arrangements for a P&R battery test and noting future availability of Tudor and Chloride batteries. | 7th Jan 1921 | Box 71 \ 3 scan0253 | |
| Requesting the Pattern Shop to make a battery box for a P & R battery for Mr. Northey's trials car. | 17th Jan 1921 | Box 71 \ 3 scan0254 | |
| The return of tyres for Chassis 81-TW after the Northey Trials and a query about invoicing and credit. | 7th Jan 1921 | Box 71 \ 3 scan0255 | |
| The despatch of a Peto & Radford battery for testing. | 19th Jan 1921 | Box 71 \ 3 scan0256 | |
| The production of a special, faster car for Mr. Salamanca for the Monte Carlo season. | 11th Apr 1921 | Box 71 \ 3 scan0257 | |
| Comparative test of a 14-tooth axle in a 1.EX car against an open trials car. | 24th Jun 1921 | Box 71 \ 3 scan0258 | |
| Customer comparing his new car to a Cadillac and arranging a demonstration to prove its superiority. | 13th Jul 1921 | Box 71 \ 3 scan0259 | |
| Importance of matching a competitor's twelve-cylinder engine performance. | 15th Jul 1921 | Box 71 \ 3 scan0260 | |
| Request to be advised when a 14-tooth axle is ready for the Trials Landaulette 1.LW. | 15th Jul 1921 | Box 71 \ 3 scan0261 | |
| Preparations for a demonstration car for Mr. Dugdale, comparing it to a Cadillac and considering potential modifications. | 18th Jul 1921 | Box 71 \ 3 scan0262 | |
| Radiator coolant, vehicle speed comparison with a Cadillac, and speedometer accuracy. | 18th Jul 1921 | Box 71 \ 3 scan0263 | |
| New car for Mr. Dugdale and clarifying a performance comparison with a Cadillac. | 21th Jul 1921 | Box 71 \ 3 scan0264 | |
| Query regarding the readiness of a 14-tooth axle for a 1.LW Trials Landaulette. | 10th Aug 1921 | Box 71 \ 3 scan0265 | |
| 14-tooth axle for a Trials Landaulet being ready for fitting. | 12th Aug 1921 | Box 71 \ 3 scan0266 | |
| The re-arrangement of Hartford shock absorber brackets for chassis 81-TW. | 14th Jan 1922 | Box 71 \ 3 scan0267 | |
| Unsuitability of Chassis 20-UG for demonstration due to engine noise and 'fuss'. | 18th Jan 1922 | Box 71 \ 3 scan0268 | |
| Urgent need to rectify a noisy axle and abnormal engine vibration on a Trials Landaulet car. | 8th Mar 1922 | Box 71 \ 3 scan0269 | |
| The performance of the 107-MG trials car, detailing issues with the engine, clutch, gearbox, and axle. | 2nd Sep 1922 | Box 71 \ 3 scan0270 | |
| Vehicle performance test report detailing handling, speed, and hill climb results. | 2nd Sep 1922 | Box 71 \ 3 scan0271 | |
| Test report for a Riviera Trials car, detailing its specifications, performance against another chassis, and dynamometer results. | 2nd Feb 1924 | Box 71 \ 3 scan0272 | |
| Comparing the maximum speed tests of cars 46-PK and 107-MG, with notes on engine performance and steering. | 2nd Feb 1924 | Box 71 \ 3 scan0273 | |
| Steering and braking issues and modifications to improve brake effectiveness. | 1st Feb 1924 | Box 71 \ 3 scan0274 | |
| The expected speed increase from a 35% power increase, focusing on the effects of tractive resistance. | 12th Jul 1923 | Box 71 \ 3 scan0275 | |
| The method for determining the tractive resistance of a touring car at 60 MPH and over. | 26th Feb 1924 | Box 71 \ 3 scan0276 | |
| Tractive resistance and horsepower requirements for a touring car. | 12th Jul 1923 | Box 71 \ 3 scan0277 | |
| Report concerning stiff steering and exhaust booming issues on car GMK-65 during trials. | 18th Sep 1924 | Box 71 \ 3 scan0278 | |
| Allocation of springs, clips, gaiters, and locating pieces for 40/50 HP Chassis models 10, 11, and 12-AU. | 30th Sep 1924 | Box 71 \ 3 scan0279 | |
| New arrangement for testing demonstration cars for overseas and domestic markets. | 1st Nov 1924 | Box 71 \ 3 scan0280 | |
| Test drive results and issues for Chassis No. 12-AU. | 16th Jan 1925 | Box 71 \ 3 scan0281 | |
| Communication issues and delays in supplying parts for Chassis 15-MC. | 12th May 1925 | Box 71 \ 3 scan0282 | |
| From the Experimental Department requesting the despatch of a radiator and fan blades for Chassis No. 15 - MC. | 18th May 1925 | Box 71 \ 3 scan0283 | |
| Dispatch of new chrome leather cup washers for three specific chassis numbers. | 18th May 1925 | Box 71 \ 3 scan0284 | |
| Expressing dissatisfaction with the high-speed performance of the 'New Phantom' during open trials. | 19th May 1925 | Box 71 \ 3 scan0285 | |
| Report detailing maintenance and damage repairs for cars 103MC and 15MC. | 21th May 1925 | Box 71 \ 3 scan0286 | |
| Vehicle repairs and damage assessment for two different job numbers. | 21th Oct 1925 | Box 71 \ 3 scan0287 | |
| Fan bracket failure and subsequent investigation. | 21th Oct 1925 | Box 71 \ 3 scan0288 | |
| Urgent memo regarding a recurring fan bracket failure on a demonstration car, requiring an immediate design review. | 25th May 1925 | Box 71 \ 3 scan0289 | |
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