| Description | Date | Identifier | |
| Investigation into the oil levels of the left-hand S.S. front dampers. | 25th Feb 1931 | Box 16 \ 4 Scan258 | |
| Policy and design options for new shock dampers, referencing several design schemes. | 2nd Mar 1931 | Box 16 \ 4 Scan259 | |
| The lubrication of shock damper connecting links on Phantom II & 25 HP models to address oil loss. | 2nd Mar 1931 | Box 16 \ 4 Scan260 | |
| Proposing a permanent application of a successful lubrication test for front shock dampers. | 3rd Mar 1931 | Box 16 \ 4 Scan261 | |
| Recommendation to raise the oil level in Phantom II front shock absorbers after deleting the Bijur supply. | 4th Mar 1931 | Box 16 \ 4 Scan262 | |
| The design, testing, and production strategy for the Phantom II shock damper. | 4th Mar 1931 | Box 16 \ 4 Scan263 | |
| From DA to HS discussing the proposed programme and design for P.2 shock dampers. | 6th Mar 1931 | Box 16 \ 4 Scan264 | |
| New, lighter alternative method for making a spring-loaded piston for shock dampers. | 7th Mar 1931 | Box 16 \ 4 Scan265 | |
| Changing a piston's material from Phosphor Bronze to cast iron for economy. | 9th Mar 1931 | Box 16 \ 4 Scan266 | |
| New intermediate piston and lever for endurance testing on a 25 HP car. | 9th Mar 1931 | Box 16 \ 4 Scan267 | |
| Programme for fitting P.2 shock dampers and related design preferences. | 6th Mar 1931 | Box 16 \ 4 Scan268 | |
| Shock dampers, agreeing to trial a piston made from cast iron. | 11th Mar 1931 | Box 16 \ 4 Scan269 | |
| Modification for lubricating the pin on a front hydraulic shock absorber. | 17th Mar 1931 | Box 16 \ 4 Scan270 | |
| Blueprint of an S.S. A.C.D. intermediate lever with an oil feed from an air vent. | 16th Mar 1931 | Box 16 \ 4 Scan271 | |
| Heavily faded document with a 'Print Room' stamp from Derby. | 17th Mar 1931 | Box 16 \ 4 Scan272 | |
| The development and production of improved shock absorbers, including a Delco split piston and new connecting link. | 23th Mar 1931 | Box 16 \ 4 Scan273 | |
| Internal memorandum requesting the manufacture of half a dozen sets of cast iron ends for shock absorbers. | 24th Mar 1931 | Box 16 \ 4 Scan274 | |
| Request for a preliminary arrangement drawing for Phantom II Rear Dampers with handwritten notes on adapting them for a 20 HP model. | 25th Mar 1931 | Box 16 \ 4 Scan275 | |
| Urgent requirement for Phantom II rear and front hydraulic shock absorbers, referencing drawing F.83611. | 9th Apr 1931 | Box 16 \ 4 Scan276 | |
| Summary of modifications required for the rear hydraulic shock dampers on a Phantom II chassis. | 11th Apr 1931 | Box 16 \ 4 Scan277 | |
| Parts list and memorandum detailing modifications for cylinders, oil pipes, and rear shock dampers. | 11th Apr 1931 | Box 16 \ 4 Scan278 | |
| Experimental design and production status of shock dampers for the Phantom II and 20/25 HP chassis. | 13th Apr 1931 | Box 16 \ 4 Scan279 | |
| Design, testing, and production of hydraulic shock absorbers for Phantom II and 20 HP models. | 14th Apr 1931 | Box 16 \ 4 Scan280 | |
| Design improvements and cost-saving measures for a horizontal damper. | 17th Apr 1931 | Box 16 \ 4 Scan281 | |
| Modifications required on rear shock dampers for the Phantom II chassis, listing replacement parts and usage instructions. | 20th Apr 1931 | Box 16 \ 4 Scan282 | |
| Test report on the Phantom II rear axle rebound movement using different damper setups. | 20th Apr 1931 | Box 16 \ 4 Scan283 | |
| Graph showing the effect of adjustable leak on rear axle movement for Delco Lovejoy shock dampers on a 25 EX car. | 20th Apr 1931 | Box 16 \ 4 Scan284 | |
| Blank page with a purple date and location stamp from the Stress Office. | 20th Apr 1931 | Box 16 \ 4 Scan285 | |
| Graph showing the effect of drilled valves on maximum rear axle movement at the Burton Road level crossing. | 20th Apr 1931 | Box 16 \ 4 Scan286 | |
| Graph showing the effect of adjustable leak on Delco Lovejoy shock dampers on rear axle movement at a level crossing. | 20th Apr 1931 | Box 16 \ 4 Scan287 | |
| Heavily faded and mostly illegible document, with only a purple date stamp being readable. | 20th Apr 1931 | Box 16 \ 4 Scan288 | |
| Standardisation sheet for oiling the link joint on Phantom II front shock dampers and the associated costs. | 23th Apr 1931 | Box 16 \ 4 Scan289 | |
| Seeking confirmation on the use of a split piston type of shock damper for the N.2 series chassis. | 1st May 1931 | Box 16 \ 4 Scan290 | |
| Principles and production costs of a hydraulic damper design, compared to Delco dampers. | 4th May 1931 | Box 16 \ 4 Scan291 | |
| Testing and ordering of materials for 40/50 HP hydraulic shock absorbers. | 6th May 1931 | Box 16 \ 4 Scan292 | |
| Decision on shock dampers for the N.2 series R.H. chassis, specifying the material for future operating levers. | 6th May 1931 | Box 16 \ 4 Scan293 | |
| Standardisation of an oiling scheme for the link joint on front shock dampers for the Phantom II. | 17th Apr 1931 | Box 16 \ 4 Scan294 | |
| Test report on 40/50 Bump Dampers, detailing wear and performance after 30 and 38 hours. | 7th May 1931 | Box 16 \ 4 Scan295 | |
| The endurance and noise testing of a pair of rear hydraulic shock absorbers. | 8th May 1931 | Box 16 \ 4 Scan296 | |
| Instruction memo detailing part replacements for a spring-loaded piston for the rear shock damper on the Phantom II & 20/25 HP chassis. | 12th May 1931 | Box 16 \ 4 Scan297 | |
| Updates to the rear hydraulic shock damper for the Phantom II 10,000 miles trials car. | 22th May 1931 | Box 16 \ 4 Scan298 | |
| Parts changes for the Phantom II chassis rear hydraulic shock damper. | 29th May 1931 | Box 16 \ 4 Scan299 | |
| Summary of modifications for rear hydraulic shock dampers on a Phantom II chassis. | 3rd Jun 1931 | Box 16 \ 4 Scan300 | |
| Development, interchangeability, and testing of hydraulic shock absorbers for various car models. | 16th Jun 1931 | Box 16 \ 4 Scan301 | |
| Dispatch and endurance testing of improved 40/50 rear shock absorbers with nitroalloy wearing pads. | 23th Jun 1931 | Box 16 \ 4 Scan302 | |
| Fitting and modification of hydraulic shock dampers controlled from the driver's seat. | 24th Jun 1931 | Box 16 \ 4 Scan303 | |
| Request to demonstrate dampers adjustable from the driving seat on a 22-EX car. | 30th Jun 1931 | Box 16 \ 4 Scan304 | |
| Modifications and tests performed on a No 2 Double Piston Damper to resolve a noise issue. | 7th Jul 1931 | Box 16 \ 5 Scan001 | |
| Technical report on experiments to eliminate noise from a damper by modifying valve leaks, hole diameters, and springs. | 7th Jul 1931 | Box 16 \ 5 Scan002 | |
| Potential modifications to valves and dampers, including clearances and drilling. | 8th Jul 1944 | Box 16 \ 5 Scan003 | |
| Blueprint of a Masked Valve for a Nº2 Double Piston Damper. | 8th Jul 1944 | Box 16 \ 5 Scan004 | |
| Stamped document indicating when a component was fitted. | 8th Dec 1931 | Box 16 \ 5 Scan005 | |
| Oil leaks from hydraulic shock absorbers. | 13th Jul 1931 | Box 16 \ 5 Scan006 | |
| Shock damper complaints, comparisons with competitors, and proposals for investigation and development. | 7th Jul 1931 | Box 16 \ 5 Scan007 | |
| Fault found during a 10,000-mile test of rear shock absorbers, specifically a hammered ball valve seat. | 24th Jul 1931 | Box 16 \ 5 Scan008 | |
| Clarifying issues with standard versus modified shock absorbers for a 10,000-mile test car. | 30th Jul 1931 | Box 16 \ 5 Scan009 | |
| Trouble with 25-EX shock absorbers during a 10,000-mile test, specifically regarding high loads in France. | 4th Aug 1931 | Box 16 \ 5 Scan010 | |
| Notice detailing a noise issue with hydraulic shock absorbers caused by the replenishing ball valves. | 11th Aug 1931 | Box 16 \ 5 Scan011 | |
| Seeking clarification on the type of shock-absorbers being tested on vehicle 25-EX. | 11th Aug 1931 | Box 16 \ 5 Scan012 | |
| The performance of low rating springs and shock absorbers on a 40/50 model used in France. | 31th Aug 1931 | Box 16 \ 5 Scan013 | |
| Vehicle suspension performance, specifically concerning shock absorbers and springs during road tests. | 2nd Sep 1931 | Box 16 \ 5 Scan014 | |
| Clarifying the specifications for holes in shock damper high-pressure valves across different chassis models. | 2nd Sep 1931 | Box 16 \ 5 Scan015 | |
| Adjustable dampers and shock absorber schemes to improve vehicle springing. | 2nd Sep 1931 | Box 16 \ 5 Scan016 | |
| Vehicle suspension, comparing Hartford's and Delco dampers and considering future adjustable damping systems. | 2nd Sep 1931 | Box 16 \ 5 Scan017 | |
| Performance graphs for a Delco II adjustable leak rear damper with a 12' lever. | 2nd Sep 1931 | Box 16 \ 5 Scan018 | |
| Mostly blank page with a purple ink 'Print Room' date stamp. | 2nd Sep 1931 | Box 16 \ 5 Scan019 | |
| Indicator diagrams for high and low-pressure double piston dampers. | 10th Jun 1931 | Box 16 \ 5 Scan020 | |
| Extremely faded and illegible typed document with a purple date stamp in the bottom right corner. | 2nd Sep 1931 | Box 16 \ 5 Scan021 | |
| 40/50 HP springing, adjustability, and fitting front hydraulic shock absorbers to car 58-GN. | 8th Sep 1931 | Box 16 \ 5 Scan022 | |
| The shock absorber loads for the 25-EX model now running in France. | 9th Sep 1931 | Box 16 \ 5 Scan023 | |
| Alterations to the 40/50 springing, comparing Hartford shock dampers with Delco adjustable hydraulics. | 9th Sep 1931 | Box 16 \ 5 Scan024 | |
| Blueprints and replacement parts for Phantom II chassis rear shock damper connecting tubes. | 18th Sep 1931 | Box 16 \ 5 Scan025 | |
| Need for controllable shock absorbers, citing performance issues and retailer feedback. | 24th Sep 1931 | Box 16 \ 5 Scan026 | |
| Necessity of replenishing pipes for hydraulic dampers, concluding they are an unnecessary complication. | 9th Oct 1931 | Box 16 \ 5 Scan027 | |
| Fitting drilled valves in rear shock absorbers and testing new experimental adjustable ones. | 2nd Oct 1931 | Box 16 \ 5 Scan028 | |
| Standardization of shock absorber settings for production based on different spring types. | 4th Nov 1931 | Box 16 \ 5 Scan029 | |
| Recommended shock damper load settings for various car models based on customer feedback. | 5th Nov 1931 | Box 16 \ 5 Scan030 | |
| Suspension settings, including valve holes and spring loads for Phantom II models. | 11th Sep 1931 | Box 16 \ 5 Scan031 | |
| Query about applying altered damper loads from an experimental Phantom II (25-EX) to production vehicles. | 11th Sep 1931 | Box 16 \ 5 Scan032 | |
| Two modifications to hydraulic shock absorbers to reduce knocking. | 1st Nov 1931 | Box 16 \ 5 Scan033 | |
| Drilling for main cylinder and end cover, common to 20/25 HP & Phantom II models. | 13th Nov 1931 | Box 16 \ 5 Scan034 | |
| Oiling scheme for a link joint front axle damper. | 11th Nov 1931 | Box 16 \ 5 Scan035 | |
| Results of tests on self-adjustable hydraulic shock absorbers. | 11th Nov 1931 | Box 16 \ 5 Scan036 | |
| Tests measuring the movement and pumping action of shock damper levers at various speeds. | 9th Nov 1931 | Box 16 \ 5 Scan037 | |
| Test data table for rear dampers, measuring time for 360-degree rotation at various speeds on two different road surfaces. | 25th Nov 1931 | Box 16 \ 5 Scan038 | |
| Curves of axle movements for a Phantom I. | 25th Nov 1931 | Box 16 \ 5 Scan039 | |
| Graphical representation of rear axle motion experiments comparing different damping settings on various road conditions. | 29th Oct 1928 | Box 16 \ 5 Scan040 | |
| Graphs from experiments on rear axle motion under various road conditions and damping settings. | 26th Nov 1931 | Box 16 \ 5 Scan041 | |
| Standardisation of connecting links for hydraulic dampers. | 22th Sep 1931 | Box 16 \ 5 Scan042 | |
| Standardisation of connecting links for the hydraulic damper to overcome oil loss. | 12th Sep 1932 | Box 16 \ 5 Scan043 | |
| The design and testing of a front shock damper located outside the frame. | 31th Dec 1931 | Box 16 \ 5 Scan044 | |
| Performance and design of shock absorbers mounted outside the frame, including issues with ball bearings. | 14th Dec 1931 | Box 16 \ 5 Scan045 | |
| Outlining recommended settings for shock dampers and springs on 20/25 HP and 40/50 HP models. | 16th Dec 1931 | Box 16 \ 5 Scan046 | |
| Guide to shock damper and spring settings for various car models. | 16th Dec 1931 | Box 16 \ 5 Scan047 | |
| Standardizing shock damper settings and modifications. | 16th Dec 1931 | Box 16 \ 5 Scan048 | |
| Specification table for various front and rear suspension springs and damping setups. | 22th Sep 1931 | Box 16 \ 5 Scan049 | |
| Standardisation of chassis parts, specifically rear hydraulic dampers. | 22th Sep 1931 | Box 16 \ 5 Scan050 | |
| Standardisation record for rear hydraulic dampers. | 22th Aug 1932 | Box 16 \ 5 Scan051 | |
| Development and standardisation of controllable shock dampers for experimental cars. | 3rd Mar 1932 | Box 16 \ 5 Scan052 | |
| Temporary scheme for P.2 shock dampers with distant control. | 17th Mar 1932 | Box 16 \ 5 Scan053 | |
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