| Description | Date | Identifier | |
| Fitting new lower rated front springs to chassis 82-AL to resolve springing complaints. | 5th May 1930 | Box 16 \ 4 Scan158 | |
| Proposed modification for drilling the Phantom II water pump spindle. | 16th May 1930 | Box 16 \ 4 Scan159 | |
| Tests conducted on front shock absorbers to investigate oil loss and emptying. | 18th May 1930 | Box 16 \ 4 Scan160 | |
| Oiling tests, lever issues, damper tests, and spring life improvements. | 19th Mar 1936 | Box 16 \ 4 Scan161 | |
| Proposal to modify the 20 HP shock absorber connecting links based on the successful Phantom II design. | 22th May 1930 | Box 16 \ 4 Scan162 | |
| Modifications to the central oiling system and shock dampers. | 19th May 1930 | Box 16 \ 4 Scan163 | |
| Use of auxiliary friction shock absorbers, comparing 'Hartford' and French 'Afa' models. | 22th May 1930 | Box 16 \ 4 Scan164 | |
| Customer springing complaints and riding qualities for the Phantom II and 25 HP models. | 23th May 1930 | Box 16 \ 4 Scan165 | |
| Shock absorber loading, damping, and ride comfort tests on various models. | 23th Feb 1930 | Box 16 \ 4 Scan166 | |
| Modifications for Phantom models and customer complaints regarding the 20 HP chassis. | 23th May 1930 | Box 16 \ 4 Scan167 | |
| List of customer complaints compiled by the Repair Dept. regarding vehicles bumping on their buffers, with suggestions for resolution. | 23th May 1930 | Box 16 \ 4 Scan168 | |
| List of vehicle ride and suspension issues and their proposed remedies. | 23th May 1930 | Box 16 \ 4 Scan169 | |
| List of numbered vehicle cases with notes on complaints and remedies, including spring replacements and swaying issues. | 14th Aug 1930 | Box 16 \ 4 Scan170 | |
| Idea for shock dampers using small air vessels and chasing a patent application. | 14th Aug 1930 | Box 16 \ 4 Scan171 | |
| Issues from three separate attempts at providing free movement in the centre shock absorber stroke. | 16th Jun 1930 | Box 16 \ 4 Scan172 | |
| The decision not to patent an air vessel for shock dampers following experimental trials. | 16th Jun 1930 | Box 16 \ 4 Scan173 | |
| Standardisation of chassis parts relating to increased rear shock damper loads. | 25th Apr 1930 | Box 16 \ 4 Scan174 | |
| Inspection report on 24-EX front shock absorbers after 10,000 miles, detailing settings, oil condition, and component wear. | 15th Aug 1930 | Box 16 \ 4 Scan175 | |
| Inspection report detailing the condition and wear measurements of various engine components. | 15th Aug 1930 | Box 16 \ 4 Scan176 | |
| Inspection report detailing the condition and measurements of dampers, shafts, bearings, links, and pistons. | 15th Aug 1930 | Box 16 \ 4 Scan177 | |
| Inspection report detailing the condition of an off-side damper and its components. | 16th Aug 1930 | Box 16 \ 4 Scan178 | |
| Recommending case hardening for shock damper levers based on successful test results. | 16th Aug 1930 | Box 16 \ 4 Scan179 | |
| Springing modifications made to a Phantom II car, chassis 58-GN. | 19th Sep 1930 | Box 16 \ 4 Scan180 | |
| Continuation of a letter regarding arrangements to collect a car from its owner. | 19th Sep 1930 | Box 16 \ 4 Scan181 | |
| Sir Robert Hadfield's car springing issues, recommending fitting Hartfords due to a top-heavy body. | 23th Sep 1930 | Box 16 \ 4 Scan182 | |
| Request to prepare two sets of standardised spring-loaded connecting links for a shock absorber. | 25th Sep 1930 | Box 16 \ 4 Scan183 | |
| Request to fit two springs, part number F.82412, to the rear connecting links of the bumper chassis. | 25th Sep 1930 | Box 16 \ 4 Scan184 | |
| Requesting the testing and fitting of weaker springs for a Phantom II damper. | 25th Sep 1930 | Box 16 \ 4 Scan185 | |
| Improvements to the pin bearings of hydraulic shock absorbers for 40/50 and 25 HP models. | 25th Sep 1930 | Box 16 \ 4 Scan186 | |
| Letter from Rolls-Royce of America to Rolls-Royce Ltd. in Derby discussing issues, costs, and improvements for shock absorbers. | 26th Sep 1930 | Box 16 \ 4 Scan187 | |
| Customer complaints regarding knocking shock absorbers and an evaluation of potential alternative suppliers. | 30th Jun 1930 | Box 16 \ 4 Scan188 | |
| Observations on competitor hydraulic instruments. | 27th Sep 1930 | Box 16 \ 4 Scan189 | |
| Outlining an assembly difficulty with a new, longer spring for the Phantom II shock damper connecting links. | 27th Sep 1930 | Box 16 \ 4 Scan190 | |
| Complaining about the harsh ride and appearance of a car after fitting new front springs. | 3rd Oct 1930 | Box 16 \ 4 Scan191 | |
| Communication regarding a customer's dissatisfaction with a suspension alteration and a proposal for further work. | 9th Oct 1930 | Box 16 \ 4 Scan192 | |
| Car test in Paris and the fitting of new front springs. | 10th Oct 1930 | Box 16 \ 4 Scan193 | |
| Road test report for car 58-GN, evaluating its stiff front springs and suggesting modifications. | 4th Oct 1930 | Box 16 \ 4 Scan194 | |
| Requesting an alteration to the oil level in hydraulic shock absorbers on experimental Phantom II cars. | 22th Oct 1930 | Box 16 \ 4 Scan195 | |
| Issues with front hydraulic damper pins and a recommended modification to the oil level. | 22th Oct 1930 | Box 16 \ 4 Scan196 | |
| Query regarding loose hydraulic shock absorbers on Phantom II cars and potential causes. | 23th Oct 1930 | Box 16 \ 4 Scan197 | |
| Loose shock absorbers, suggesting coachbuilders are the cause. | 24th Oct 1930 | Box 16 \ 4 Scan198 | |
| Investigation into hydraulic shock absorber complaints, specifically focusing on knocking issues and slack links. | 25th Oct 1930 | Box 16 \ 4 Scan199 | |
| Technical report on diagnosing causes of knocks and noises in Phantom II and 20 HP models. | 25th Oct 1930 | Box 16 \ 4 Scan200 | |
| Oil loss from dampers and other related faults. | 25th Oct 1930 | Box 16 \ 4 Scan201 | |
| Summary of damper and link issues, including oil leaks and audible knocks, with proposed design improvements. | 25th Oct 1930 | Box 16 \ 4 Scan202 | |
| Continued memo about investigating 'mysterious knockers' and shock damper arms, noting the difficulty of diagnosis without the customer's car. | 25th Oct 1930 | Box 16 \ 4 Scan203 | |
| Shock absorbers that were tampered with by having their caps left unscrewed. | 25th Oct 1930 | Box 16 \ 4 Scan204 | |
| Modifications to the front hydraulic shock damper and fixing bolts for the Phantom II & L.H. Phantom II chassis. | 25th Oct 1930 | Box 16 \ 4 Scan205 | |
| Handling of shock absorber maintenance complaints and the circulation of related correspondence. | 27th Oct 1930 | Box 16 \ 4 Scan206 | |
| Specifying the Hartford shock absorber loads for the short type chassis. | 1st Nov 1930 | Box 16 \ 4 Scan207 | |
| Quarterly complaints report regarding tests on radiators, fabric couplings, and shock absorber knocks. | 3rd Nov 1930 | Box 16 \ 4 Scan208 | |
| Instructing the addition of a breather hole and deletion of oil grooves on rear Phantom shock dampers for experimental cars. | 4th Nov 1930 | Box 16 \ 4 Scan209 | |
| Proposal to improve lubrication of the front shock damper's upper joint by redirecting escaping oil via a bent pipe from the air vent. | 1st Nov 1930 | Box 16 \ 4 Scan210 | |
| Increased requirements and challenges of designing effective shock dampers for modern cars. | 22th Nov 1930 | Box 16 \ 4 Scan211 | |
| Report discussing the performance, issues, and future redesign of shock dampers and related suspension components. | 22th Nov 1930 | Box 16 \ 4 Scan212 | |
| Postscript discussing issues with shock dampers, their connections, and central oiling systems. | 17th Nov 1930 | Box 16 \ 4 Scan213 | |
| Proposed scheme and testing for slings under the rear axle. | 17th Nov 1930 | Box 16 \ 4 Scan214 | |
| Rear shock dampers with a 10 inch lever as per N. scheme 3172. | 17th Nov 1930 | Box 16 \ 4 Scan215 | |
| Customer issues with shock absorbers in the USA, comparing R.R. and Delco types, and proposing further testing. | 18th Nov 1930 | Box 16 \ 4 Scan216 | |
| Modifications to front and rear hydraulic shock dampers on 20/25 HP & 40/50 HP chassis to reduce knocks. | 21th Nov 1930 | Box 16 \ 4 Scan217 | |
| Alterations to the rear and front damper high pressure valves and oil passages for the 20/25 HP chassis. | 21th Nov 1930 | Box 16 \ 4 Scan218 | |
| Proposed scheme for lubricating the front shock damper pin using oil from the air vent. | 24th Nov 1930 | Box 16 \ 4 Scan219 | |
| Car springing, discussing increased deflection settings to improve ride quality. | 27th Nov 1930 | Box 16 \ 4 Scan220 | |
| Letter to a Mr. Beaver explaining the design philosophy and history behind the springing of the Phantom II. | 1st Dec 1930 | Box 16 \ 4 Scan221 | |
| Vehicle springing, weight distribution, and shock absorber improvements for Phantom II. | 1st Dec 1930 | Box 16 \ 4 Scan222 | |
| Typed letter from F. H. Royce discussing the performance and design of shock dampers, comparing their own with the Lovejoy type. | 2nd Dec 1930 | Box 16 \ 4 Scan223 | |
| Alterations to the rear hydraulic shock dampers for the Phantom II chassis. | 2nd Dec 1930 | Box 16 \ 4 Scan224 | |
| Modifications to ball valves and the addition of a filter in hydraulic shock dampers for the 40/50 HP chassis. | 8th Dec 1930 | Box 16 \ 4 Scan225 | |
| Page two of an instruction memo detailing the completion of a job using standard parts. | 8th Dec 1930 | Box 16 \ 4 Scan226 | |
| Tests concerning the importance of replenishing valve size on high-pressure front shock absorbers. | 12th Dec 1930 | Box 16 \ 4 Scan227 | |
| Hydraulic shock damper design, its circular filter, and suitability for the 25HP and Phantom II models. | 24th Dec 1930 | Box 16 \ 4 Scan228 | |
| Investigation into the cause of knocking in hydraulic dampers on Phantom II & 20 HP models. | 3rd Jan 1931 | Box 16 \ 4 Scan229 | |
| The efficiency and characteristics of vehicle dampers, air vents, and levers. | 3rd Jan 1931 | Box 16 \ 4 Scan230 | |
| Analysis of damper pressure, valve efficiency, steering characteristics, and material considerations. | 3rd Jan 1931 | Box 16 \ 4 Scan231 | |
| Damper performance, quarterly complaints, and future development including testing of 'Delco' dampers. | 3rd Jan 1931 | Box 16 \ 4 Scan232 | |
| Series of indicator diagrams comparing performance under various component configurations and operating conditions. | 3rd Jan 1931 | Box 16 \ 4 Scan233 | |
| Blank document with a Print Room stamp in the bottom right corner. | 3rd Jan 1931 | Box 16 \ 4 Scan234 | |
| Series of performance graphs for Phantom II front dampers under various test conditions. | 5th Jan 1931 | Box 16 \ 4 Scan235 | |
| The reverse of a document showing a company 'received' date stamp. | 5th Jan 1931 | Box 16 \ 4 Scan236 | |
| Graph and diagrams from tests conducted on a 20 HP Rear Damper Lever. | 3rd Dec 1930 | Box 16 \ 4 Scan237 | |
| Blank document page with a purple ink stamp from the print room. | 3rd Jan 1931 | Box 16 \ 4 Scan238 | |
| Series of six graphs showing performance characteristics of Phantom II rear dampers under various test conditions. | 5th Jan 1931 | Box 16 \ 4 Scan239 | |
| Heavily faded technical drawing with a receiving stamp in the bottom left corner. | 5th Jan 1931 | Box 16 \ 4 Scan240 | |
| Sheet of performance graphs for Phantom II rear dampers under high pressure with various configurations. | 5th Jan 1931 | Box 16 \ 4 Scan241 | |
| Almost completely illegible typed document with a 'Print Room' date stamp from Derby. | 5th Jan 1931 | Box 16 \ 4 Scan242 | |
| Outlining requested modifications to Phantom II rear shock absorbers for testing. | 9th Jan 1931 | Box 16 \ 4 Scan243 | |
| Request to make modified parts for the Phantom II rear shock absorber to test Delco valves. | 12th Jan 1931 | Box 16 \ 4 Scan244 | |
| Modifying the air release hole in front shock damper filler tubes to prevent overfilling. | 14th Jan 1931 | Box 16 \ 4 Scan245 | |
| Issues with existing shock absorbers and proposing design modifications. | 6th Feb 1931 | Box 16 \ 4 Scan246 | |
| Issues and solutions for front shock absorbers on the Phantom II model, including proposals for a redesign. | 7th Feb 1931 | Box 16 \ 4 Scan247 | |
| Provisional shock damper load recommendations for cars being sent to Springfield, America. | 7th Feb 1931 | Box 16 \ 4 Scan248 | |
| Instructions regarding front and rear shock dampers for the L.H. Phantom II model. | 11th Feb 1931 | Box 16 \ 4 Scan249 | |
| Urgent memo about setting loads for endurance testing of improved Phantom II shock absorbers for American cars. | 11th Feb 1931 | Box 16 \ 4 Scan250 | |
| Proposed spring-loaded piston for P.2 rear shock dampers and the potential use of P.2 dampers on the 25HP model. | 16th Feb 1931 | Box 16 \ 4 Scan251 | |
| Completion of a spring loaded piston for shock dampers and inquiring about production. | 18th Feb 1931 | Box 16 \ 4 Scan252 | |
| Changes to shock damper loads for L.H. (Left-Hand) Phantom II cars for the U.S.A. | 21th Feb 1931 | Box 16 \ 4 Scan253 | |
| Working loose of the Phantom II rear shock damper ball end anchorage. | 23th Feb 1931 | Box 16 \ 4 Scan254 | |
| Two schemes for increasing the stiffness of P.E. Shock Dampers. | 23th Feb 1931 | Box 16 \ 4 Scan255 | |
| Technical memo discussing issues with shock dampers and suspension springs, and an initial review of competing Delco-Lovejoy dampers. | 23th Feb 1931 | Box 16 \ 4 Scan256 | |
| Dimensions and construction of levers, shafts, and dampers. | 25th Feb 1931 | Box 16 \ 4 Scan257 | |
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