| Description | Date | Identifier | |
| Specifications for springing, car weight, and clearances for model 25-EX. | 7th Mar 1931 | Box 17 \ 1 Scan017 | |
| Specifications for vehicle springing, including spring loads, damper loads, car weight, and buffer clearances. | 11th Mar 1931 | Box 17 \ 1 Scan018 | |
| The standardisation of road springs for the Phantom and 25 HP models, recommending American chassis springs. | 11th Mar 1931 | Box 17 \ 1 Scan019 | |
| Request to fit specified front and rear road springs to vehicle 110-DC. | 18th Mar 1931 | Box 17 \ 1 Scan020 | |
| 'Springing' with an attached extract from a letter. | 4th Apr 1931 | Box 17 \ 1 Scan021 | |
| Extract from a letter from 'The Motor' magazine requesting suspension data for the 40-50 HP model. | 13th Apr 1931 | Box 17 \ 1 Scan022 | |
| From Sg. to Hs. requesting information regarding springing following a recent conversation. | 21th Apr 1931 | Box 17 \ 1 Scan023 | |
| Short memo confirming the provision of requested particulars without further detail. | 22th Apr 1931 | Box 17 \ 1 Scan024 | |
| Specification sheet detailing the springing characteristics for the 40/50 HP model. | 22th Apr 1931 | Box 17 \ 1 Scan025 | |
| To stop all work on specific unsatisfactory oil pipe clips for the Phantom II chassis, pending a new spring steel clip design. | 22th Apr 1931 | Box 17 \ 1 Scan026 | |
| Summary log detailing tests performed on rear springs since January 1931. | 24th Apr 1931 | Box 17 \ 1 Scan027 | |
| Summary of front springs tested since January 1931 for the 40/50 PII model. | 24th Apr 1931 | Box 17 \ 1 Scan028 | |
| Comparison table of road spring specifications for two Phantom II vehicles. | 12th May 1931 | Box 17 \ 1 Scan029 | |
| Review of road springs, discussing the negative effects of fitting low deflection springs on vehicle steering and braking. | 13th May 1931 | Box 17 \ 1 Scan030 | |
| The maximum stress in spring leaves and a summary of spring standardisation for the 25 HP and 40/50 models. | 13th May 1931 | Box 17 \ 1 Scan031 | |
| Specification table detailing the particulars of low rating springs for 40/50 and 20 HP models. | 13th May 1931 | Box 17 \ 1 Scan032 | |
| Main leaf test results for the 20 HP front and rear springs. | 19th May 1931 | Box 17 \ 1 Scan033 | |
| Design and manufacturing considerations for road springs, including camber and stress. | 19th May 1931 | Box 17 \ 1 Scan034 | |
| The design considerations and rationale for the free camber of front road springs. | 1st Jun 1931 | Box 17 \ 1 Scan035 | |
| Additional and replacement parts for front springs on 20/25 HP chassis. | 3rd Jun 1931 | Box 17 \ 1 Scan036 | |
| The wide range of springing options for 40/50 and 25 HP cars and the need to capture customer requirements. | 13th Jun 1931 | Box 17 \ 1 Scan037 | |
| Table outlining the available range of spring deflections for 40/50 and 25 HP cars. | 17th Jun 1931 | Box 17 \ 1 Scan038 | |
| Springing specifications for car 58-GN, including spring loads, damper settings, clearances, and vehicle weight. | 17th Jun 1931 | Box 17 \ 1 Scan039 | |
| Letter requesting clarification on the differences in suspension springing for various 40/50 HP chassis models. | 18th Jun 1931 | Box 17 \ 1 Scan040 | |
| Strategy for springing on cars, advocating for bespoke options based on customer requirements. | 19th Jun 1931 | Box 17 \ 1 Scan041 | |
| Pros and cons of different types of road springs for cars. | 22th Jun 1931 | Box 17 \ 1 Scan042 | |
| The springing of cars, highlighting a case where unsuitable springs were fitted and advocating for better processes. | 24th Jun 1931 | Box 17 \ 1 Scan043 | |
| Three types of springs available for the Phantom II & 25 HP models and the importance of selecting the correct type for the customer. | 25th Jun 1931 | Box 17 \ 1 Scan044 | |
| Re-springing of cars, specifically fitting Continental type springs to a Phantom II chassis. | 26th Jun 1931 | Box 17 \ 1 Scan045 | |
| The experience of fitting Continental springs and Hartford shock absorbers to a Phantom II chassis. | 27th Jun 1931 | Box 17 \ 1 Scan046 | |
| Springing issues on the Phantom-II and 25 HP models. | 29th Jun 1931 | Box 17 \ 1 Scan047 | |
| Serious difficulties with the springing on the Phantom II and 25 HP models, enclosing a copy of another memo on the subject. | 10th Jul 1931 | Box 17 \ 1 Scan048 | |
| Internal memorandum discussing the impracticality of offering custom springing options for Phantom II and 20/25-HP models. | 8th Jul 1931 | Box 17 \ 1 Scan049 | |
| Customer complaints and the development of low-rating springs for the Phantom II & 25 HP models. | 13th Jul 1931 | Box 17 \ 1 Scan050 | |
| The performance of low rating springs and hydraulic shock absorbers during road testing in France. | 31th Aug 1931 | Box 17 \ 1 Scan051 | |
| Controllability of steering and the effectiveness of different shock absorber setups with low rating springs. | 31th Aug 1931 | Box 17 \ 1 Scan052 | |
| Various schemes for adjustable dampers and shock absorbers to improve vehicle springing and ride quality. | 2nd Sep 1931 | Box 17 \ 1 Scan053 | |
| Fitting Hartford and Delco dampers, developing adjustable dampers, and improving overall ride quality. | 2nd Sep 1931 | Box 17 \ 1 Scan054 | |
| Performance graphs for a Delco rear damper with an adjustable leak and 12-inch lever. | 2nd Sep 1981 | Box 17 \ 1 Scan055 | |
| Blank document page with a purple ink date stamp. | 2nd Sep 1981 | Box 17 \ 1 Scan056 | |
| Performance graphs for a Double Piston Damper under high and low pressure conditions. | 10th Jun 1931 | Box 17 \ 1 Scan057 | |
| Largely blank or faded page with a 'PRINT ROOM DERBY' ink stamp. | 2nd Sep 1931 | Box 17 \ 1 Scan058 | |
| 40/50 springing, the adjustability of shock absorbers, and a missing sketch. | 8th Sep 1931 | Box 17 \ 1 Scan059 | |
| Alterations to front shock dampers and springing on a 40/50 model. | 9th Sep 1931 | Box 17 \ 1 Scan060 | |
| Seasonal complaints regarding vehicle springing and damping. | 8th Sep 1931 | Box 17 \ 1 Scan061 | |
| Comparing the handling characteristics of cars 25-EX, 31-GX and 25-WJ, focusing on issues with springing, pitching, and steering. | 18th Sep 1931 | Box 17 \ 1 Scan062 | |
| Springing and shock absorbers for the 25-EX model, referencing previous reports and suggesting further testing. | 22th Sep 1931 | Box 17 \ 1 Scan063 | |
| Use of flexible springs and adjustable shock dampers for car work, including cost considerations and potential designs. | 26th Sep 1931 | Box 17 \ 1 Scan064 | |
| Riding qualities, the necessity of combining luxury with high-speed capacity, and the development of controllable shock dampers. | 1st Sep 1931 | Box 17 \ 1 Scan065 | |
| Proposed damper scheme using two double-way valves and a replenishment system. | 12th Oct 1931 | Box 17 \ 1 Scan066 | |
| Potential economic changes to road spring design proposed by Firths. | 12th Oct 1931 | Box 17 \ 1 Scan067 | |
| Outlining the standard questions asked to customers to determine their requirements for vehicle suspension (springing). | 13th Oct 1931 | Box 17 \ 1 Scan068 | |
| Use of solid eye versus rolled eye road springs and their impact on cost and frame design. | 15th Oct 1931 | Box 17 \ 1 Scan069 | |
| Use of central rolled eyes in special road springs, referencing a successful test and cost comparison. | 16th Oct 1931 | Box 17 \ 1 Scan070 | |
| Modification to the rear spring swivel pin on the 25-EX model to improve lubrication. | 7th Nov 1931 | Box 17 \ 1 Scan071 | |
| Modification of shackle bolts to improve the lubrication of road springs on the 25-EX chassis. | 11th Nov 1931 | Box 17 \ 1 Scan072 | |
| Standardisation of low rating springs for the Phantom and 20/25 chassis. | 25th Nov 1931 | Box 17 \ 1 Scan073 | |
| Sending curves of axle movements taken on a Phantom 1 car. | 25th Nov 1931 | Box 17 \ 1 Scan074 | |
| Blueprint showing graphs of rear axle motion experiments for a Phantom 98 N.K. vehicle. | 25th Nov 1931 | Box 17 \ 1 Scan075 | |
| Graph sheet from a Phantom 98 N.K showing rear axle motion experiments comparing performance with and without shock absorbers on different road surfaces. | 25th Nov 1931 | Box 17 \ 1 Scan076 | |
| Use and standardisation of low rating springs on Phantom and 25 HP models. | 30th Nov 1931 | Box 17 \ 1 Scan077 | |
| Standardisation of low rating front road springs for R.H. and L.H. cars to improve riding comfort. | 5th May 1931 | Box 17 \ 1 Scan078 | |
| Standardisation form for chassis parts detailing costs and availability. | 22th Sep 1936 | Box 17 \ 1 Scan079 | |
| Standardisation of chassis parts for R.H. as well as L.H. cars, low rating rear road springs. | 5th May 1931 | Box 17 \ 1 Scan080 | |
| Standardisation form for a low fitting rear shock absorber to improve riding comfort. | 2nd Aug 1931 | Box 17 \ 1 Scan081 | |
| Proposed spring-controlled flexible rear shackle for front springs. | 15th Apr 1932 | Box 17 \ 1 Scan082 | |
| Policy memo detailing road spring specifications for the Phantom II, distinguishing between English and Continental models. | 5th May 1932 | Box 17 \ 1 Scan083 | |
| Trouble with stiffer five-plate springs on Phantom II Continental Tourers causing bumping on the rear buffers. | 7th Jun 1932 | Box 17 \ 1 Scan084 | |
| Comparison of standard and stiffer buffer clearances with recommendations for Continental Tourers. | 7th Jun 1932 | Box 17 \ 1 Scan085 | |
| Comparison of standard versus stiffer road springs and their performance characteristics under load. | 16th Jun 1932 | Box 17 \ 1 Scan086 | |
| Recommendation to increase spring stiffness and buffer clearance on continental chassis to prevent 'crashing'. | 16th Jun 1932 | Box 17 \ 1 Scan087 | |
| Specifications and performance of stiffer road springs for the Phantom II model. | 21th Jun 1932 | Box 17 \ 1 Scan088 | |
| Car performance, particularly regarding dampers and suitability for high-speed use and special events. | 14th Jul 1932 | Box 17 \ 1 Scan089 | |
| Overstock of Normal Type Axle Springs for the 40/50 HP chassis. | 31th Aug 1932 | Box 17 \ 1 Scan090 | |
| Confirming stock levels and usage procedures for 40/50 HP Normal type Axle Springs. | 28th Jun 1932 | Box 17 \ 1 Scan091 | |
| Stock list for Phantom II front and rear axle springs. | 28th Jun 1932 | Box 17 \ 1 Scan092 | |
| Standardisation of a Shimmy Shackle for a 40/50 HP chassis to reduce road shocks. | 27th Jun 1932 | Box 17 \ 1 Scan093 | |
| Standardisation form for a new chassis part detailing test chassis, date and costs. | 3rd Sep 1932 | Box 17 \ 1 Scan094 | |
| From Sg. to Hs. concerning a follow-up on Independent Springing. | 15th Nov 1932 | Box 17 \ 1 Scan095 | |
| Progress and next steps for an independent springing design proposal. | 2nd Nov 1932 | Box 17 \ 1 Scan096 | |
| Practicality of various car suspension schemes, with a focus on the Dubonnet system. | 30th Nov 1932 | Box 17 \ 1 Scan097 | |
| Extract detailing work in progress on an independent wheel suspension scheme. | 6th Dec 1932 | Box 17 \ 1 Scan098 | |
| Use and testing of road springs with rolled eyes on the 40/50 chassis. | 6th Jan 1933 | Box 17 \ 1 Scan099 | |
| Standardisation of five-plate stiffer type axle springs to achieve cost savings. | 4th May 1933 | Box 17 \ 1 Scan100 | |
| Standardisation tests for Phantom II chassis road springs with rolled eyes. | 26th May 1933 | Box 17 \ 1 Scan101 | |
| Testing and pricing of chassis road springs with rolled vs. solid eyes from suppliers Firths and Woodhead. | 2nd Aug 1933 | Box 17 \ 1 Scan102 | |
| Oil leaks in Rolled Eye P.II. Road Springs due to incorrect bushes and suggesting a course of action. | 27th Jul 1933 | Box 17 \ 1 Scan103 | |
| Note on front suspension and whether to proceed with a provisional pattern. | 15th Feb 1934 | Box 17 \ 1 Scan104 | |
| From ROY to Hs. chasing a reply and confirming the need to order additional 40/50 HP Axle Springs. | 9th Feb 1934 | Box 17 \ 1 Scan105 | |
| Requesting a report on sample Rolled Eye 40/50 HP axle springs. | 24th Oct 1933 | Box 17 \ 1 Scan106 | |
| Proposal for improving the ride quality of the Phantom II by mounting front suspension components directly to the engine. | 24th Oct 1933 | Box 17 \ 1 Scan107 | |
| Vehicle frame design, stiffness, and component mounting considerations. | 19th Feb 1934 | Box 17 \ 1 Scan108 | |
| From 'E' to 'Hs' discussing a patent, axle design, and steering and suspension issues on test vehicles. | 19th Feb 1934 | Box 17 \ 1 Scan109 | |
| Customer complaint about the Phantom II's springing being too soft and making the customer's wife ill. | 19th Apr 1934 | Box 17 \ 1 Scan110 | |
| Letter detailing a customer complaint from Mr. F. C. Burgess regarding the springing on car 27-RY and the urgent need for resolution. | 10th May 1934 | Box 17 \ 1 Scan111 | |
| Feedback on a new controllable system, noting its small effect even at maximum. | 11th May 1934 | Box 17 \ 1 Scan112 | |
| Springing, ride control, and experiments with an anti-roll torsion rod for Phantom and 25 HP cars. | 11th May 1934 | Box 17 \ 1 Scan113 | |
| Arrangements for a customer complaint regarding car 27-RY, involving the coachbuilders Abbotts. | 1st May 1934 | Box 17 \ 1 Scan114 | |
| Telegram received by telephone rescheduling the Burgess 2Y RY test from Monday to Tuesday. | 12th May 1934 | Box 17 \ 1 Scan115 | |
| Typed memo confirming a telephone call to clarify a date misunderstanding regarding a complaint case. | 2nd May 1934 | Box 17 \ 1 Scan116 | |
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