| Description | Date | Identifier | |
| To Mr. Platford detailing a suggestion from Mr. Truffault for an improved spring roller and friction shock absorber. | 14th Feb 1916 | Box 19 \ 2 Scan012 | |
| Report on an interview with Mr. Truffault, Mr. Royce's opinion on spring rollers, and the acquisition of new shock absorbers. | 14th Feb 1916 | Box 19 \ 2 Scan013 | |
| Forwarding Blackshaw's report on an interview with Mr. Truffault. | 22th Feb 1916 | Box 19 \ 2 Scan014 | |
| Departmental memo regarding the delivery of Truffault shock absorbers for experimental purposes. | 22th Feb 1916 | Box 19 \ 2 Scan015 | |
| Departmental memo regarding the receipt of new experimental Truffault Shock Absorbers and coordinating with Peugeot for an export permit. | 29th Feb 1916 | Box 19 \ 2 Scan016 | |
| Departmental memo regarding the testing and valuation of Truffault shock absorbers. | 29th Mar 1916 | Box 19 \ 2 Scan017 | |
| Notes and recommendations from the inventor regarding Truffault Shock Absorbers. | 29th Mar 1916 | Box 19 \ 2 Scan018 | |
| The trial and fitting of shock absorbers, comparing another manufacturer's methods and suggesting modifications. | 29th Mar 1916 | Box 19 \ 2 Scan019 | |
| Technical note on the Truffault Shock Absorber, discussing material changes and corrections to design drawings. | 4th Mar 1916 | Box 19 \ 2 Scan020 | |
| Departmental memo regarding the distribution of blueprints and translated notices for Truffault Shock Absorbers. | 4th Mar 1916 | Box 19 \ 2 Scan021 | |
| Blueprint detailing the assembly of a Truffault-Peugeot suspension system. | 16th Feb 1916 | Box 19 \ 2 Scan022 | |
| Project blueprint for a modified rear shock absorber. | 1st Mar 1916 | Box 19 \ 2 Scan023 | |
| Project for modification of an apparatus for rear mounting. | 1st Mar 1916 | Box 19 \ 2 Scan024 | |
| Blueprint of a Peugeot Truffault shock absorber with detailed component drawings. | 1st Mar 1916 | Box 19 \ 2 Scan025 | |
| French language document cover page regarding the construction details of an apparatus. | 1st Mar 1916 | Box 19 \ 2 Scan026 | |
| Blueprint showing the assembly of a Peugeot-Truffault shock absorber. | 1st Mar 1916 | Box 19 \ 2 Scan027 | |
| Cover sheet for a document titled 'Ensemble de l'appareil' (Device Assembly), stamped by Peugeot. | 1st Mar 1916 | Box 19 \ 2 Scan028 | |
| Blueprint for the assembly of the rear Truffault-Peugeot suspensions. | 16th Feb 1916 | Box 19 \ 2 Scan029 | |
| Project document for a rear mounting or assembly, written in French. | 1st Mar 1916 | Box 19 \ 2 Scan030 | |
| Blueprint of a Peugeot Truffault shock absorber and its components. | 1st Mar 1916 | Box 19 \ 2 Scan031 | |
| Folded document cover with handwritten notes and a stamp from Cycles Peugeot. | 1st Mar 1916 | Box 19 \ 2 Scan032 | |
| The payment and dispatch of a set of Truffault shock absorbers. | 15th Mar 1916 | Box 19 \ 2 Scan033 | |
| Truffault Shock Absorbers, instructing the Experimental Department to report on the cost. | 20th Mar 1916 | Box 19 \ 2 Scan034 | |
| Requesting an update on the delivery of Truffault shock absorbers. | 22th May 1916 | Box 19 \ 2 Scan035 | |
| Chasing the delivery of Truffault shock absorbers from Paris. | 26th May 1916 | Box 19 \ 2 Scan036 | |
| The delayed arrival of a set of Truffault Shock Absorbers from Paris. | 26th May 1916 | Box 19 \ 2 Scan037 | |
| Arrival and fitting of Truffault shock absorbers. | 28th Jul 1916 | Box 19 \ 2 Scan038 | |
| Value of Truffault shock absorbers after examination. | 28th Jul 1916 | Box 19 \ 2 Scan039 | |
| Memo regarding the dispatch of parts and a query to Mr. Royce. | 28th Jul 1916 | Box 19 \ 2 Scan040 | |
| Internal order form for shock absorbers and related vehicle components. | 24th Jul 1916 | Box 19 \ 2 Scan041 | |
| Attaching previous correspondence regarding Truffault Shock Absorbers X.762. | 8th Aug 1916 | Box 19 \ 2 Scan042 | |
| Payment for and seeking an opinion on Truffault Shock Absorbers. | 11th Aug 1916 | Box 19 \ 2 Scan043 | |
| Use of Trauffault Shock Absorbers and experiments to improve chassis performance. | 21th Sep 1916 | Box 19 \ 2 Scan044 | |
| Shipment of a specimen Trauffault Shock Absorber and a complete set. | 25th Sep 1916 | Box 19 \ 2 Scan045 | |
| Despatch of a Trauffault Shock Absorber to Mr. Royce. | 25th Sep 1916 | Box 19 \ 2 Scan046 | |
| Requesting the experimental fitting of a set of X.762 Trauffault rear axle shock absorbers to car 7CA. | 26th Sep 1916 | Box 19 \ 2 Scan047 | |
| The experimental fitting of X.762 shock absorbers to a 7CA vehicle. | 26th Sep 1916 | Box 19 \ 2 Scan048 | |
| Requesting a report on Truffault Shock Absorbers. | 28th Sep 1916 | Box 19 \ 2 Scan049 | |
| Spring friction, shock absorbers, and potential suspension improvements for a post-war chassis. | 1st Oct 1916 | Box 19 \ 2 Scan050 | |
| Following up on an instruction regarding Truffault shock absorbers for experimental chassis 7-CA. | 7th Oct 1918 | Box 19 \ 2 Scan051 | |
| Forwarding and requested return of a Truffault Shock Absorber. | 10th Oct 1916 | Box 19 \ 2 Scan052 | |
| Completed experiments on carburettors and shock absorbers handed over for testing. | 11th Jan 1917 | Box 19 \ 2 Scan053 | |
| Feedback on Truffault shock absorbers on chassis 7- C.A. | 9th Mar 1917 | Box 19 \ 2 Scan054 | |
| Post-war engine improvements, camshaft experiments, and lending parts for trials in Spain. | 13th Mar 1917 | Box 19 \ 2 Scan055 | |
| Overhaul and a list of 11 proposed improvements for car RE 7C. | 19th Apr 1917 | Box 19 \ 2 Scan056 | |
| Continued list of vehicle component specifications and modifications. | 15th May 1916 | Box 19 \ 2 Scan057 | |
| Proposed modifications to the 7 CA car engine, focusing on pistons, connecting rods, valves, and camshafts. | 2nd May 1917 | Box 19 \ 2 Scan058 | |
| Improvements to gearbox oil retention, suspension, and the lightening of the back axle. | 1st Jun 1917 | Box 19 \ 2 Scan059 | |
| Extract detailing the fitting of experimental Truffault shock absorbers to the back of a car. | 1st Jun 1917 | Box 19 \ 2 Scan060 | |
| Alteration note number 158 for a Truffault shock absorber bracket X.762A, including a dimensioned sketch. | 9th Jun 1917 | Box 19 \ 2 Scan061 | |
| Experimental parts fitted to chassis 7 C.A. | 13th Jun 1917 | Box 19 \ 2 Scan062 | |
| Extract detailing parts fitted to car 7 C.A. for Mr. Royce, including springs, shock absorbers, and a speed indicator. | 15th Jun 1917 | Box 19 \ 2 Scan063 | |
| Road test report on Chassis 7 CA, detailing engine, clutch, and suspension performance. | 4th Jul 1917 | Box 19 \ 2 Scan064 | |
| Performance and theory of shock dampers with variable damping effects. | 4th Jul 1917 | Box 19 \ 2 Scan065 | |
| Fitting of experimental pistons with narrow rings to Wing-Commander Briggs' car. | 4th Jul 1917 | Box 19 \ 2 Scan066 | |
| Proposed post-war camshafts and observations on springing, shock absorbers, and braking on a specific vehicle. | 4th Jul 1917 | Box 19 \ 2 Scan067 | |
| Potential car alterations for post-war models, focusing on wheel clearance and suspension. | 10th Jul 1917 | Box 19 \ 2 Scan068 | |
| Petrol consumption of the 7 CA car and production delays for new rocking arms and camshafts. | 10th Jul 1917 | Box 19 \ 2 Scan069 | |
| Camshaft and shock absorber options for Commander Briggs' car, awaiting a decision from Mr. Royce. | 19th Sep 1917 | Box 19 \ 2 Scan070 | |
| Revisions to the 'After the War Chassis' for a potential American model, including suggested improvements to valve lift and compression. | 19th Sep 1917 | Box 19 \ 2 Scan071 | |
| List of technical recommendations and observations on various car components and specific models. | 1st Sep 1917 | Box 19 \ 2 Scan072 | |
| Construction of a new chassis, mentioning the need for a Self Starter and its suitability for the American market. | 23th Aug 1940 | Box 19 \ 2 Scan073 | |
| Meeting memo detailing design changes to be incorporated into the post-war car chassis. | 19th Sep 1917 | Box 19 \ 2 Scan074 | |
| List of engineering specifications and modifications, page 2. | 24th Feb 1917 | Box 19 \ 2 Scan075 | |
| Inquiring about the progress of experiments on Truffault Shock Absorbers. | 12th Oct 1917 | Box 19 \ 2 Scan076 | |
| Confirming positive results for Truffault shock absorbers on an experimental chassis and the decision to fit them to the 'After-the-War' chassis. | 12th Oct 1917 | Box 19 \ 2 Scan077 | |
| Unsatisfactory Zephyr type pistons causing knocks and failures, intended for an after-the-war chassis. | 22th Oct 1918 | Box 19 \ 2 Scan078 | |
| Fitting Trauffault-style shock absorbers to an after-the-war chassis. | 26th Apr 1917 | Box 19 \ 2 Scan079 | |
| Specification of alterations for the 40/50 HP chassis (R7/G181218) to be applied to 500 units. | 8th Jan 1919 | Box 19 \ 2 Scan080 | |
| Alterations and experimental work for the 40/50 HP present type chassis, model X.2565. | 18th Dec 1918 | Box 19 \ 2 Scan081 | |
| Selection of wheels and the design of shock dampers. | 18th Dec 1918 | Box 19 \ 2 Scan082 | |
| The specifications for Trufault shock absorbers for the front and back of a car. | 29th Jan 1919 | Box 19 \ 2 Scan083 | |
| Observations on the bouncing of the rear axle on a 40/50 chassis car at different speeds and with varied passenger loads. | 29th May 1919 | Box 19 \ 2 Scan084 | |
| Road tests comparing car performance with and without Truffault Shock Absorbers. | 29th May 1919 | Box 19 \ 2 Scan085 | |
| Instructions regarding Truffault shock absorbers on chassis 7CA, detailing required weights for movement. | 20th Aug 1911 | Box 19 \ 2 Scan086 | |
| Comparing bronze plates against steel and fibre plates for use in rear shock absorbers. | 13th Nov 1920 | Box 19 \ 2 Scan087 | |
| The increased friction measurement of Ferodo Discs in a shock absorber on the 6.EX car. | 13th Nov 1920 | Box 19 \ 2 Scan088 | |
| And comparing different shock damper patterns such as scissors, Hartford, and Truffault. | 29th Dec 1921 | Box 19 \ 2 Scan089 | |
| Letter from Rolls-Royce America regarding the use of Truffault shock absorbers on sports cars to address front-wheel wobble and for high-speed use. | 12th Apr 1928 | Box 19 \ 2 Scan090 | |
| Reference note for previous correspondence concerning 40/50 & Phantom models in the U.S.A. | 21th Sep 1931 | Box 19 \ 3 Scan001 | |
| Visit by Mr. Hardy to Derby for work on the L.H. SS. gearbox. | 18th Dec 1928 | Box 19 \ 3 Scan002 | |
| Handover of design for the L.H. 'SS' gearbox and a period of secrecy. | 27th Dec 1928 | Box 19 \ 3 Scan003 | |
| Instructing departments to order parts for three complete Left Hand 'SS' Chassis cars. | 11th Jan 1929 | Box 19 \ 3 Scan004 | |
| Secret letter from Rolls-Royce of America to the Derby works inquiring about the progress of a new car program and chassis development. | 11th Jan 1929 | Box 19 \ 3 Scan005 | |
| Letter discussing experimental cars, production schedules, and direct communication channels with the Derby Works. | 21th Jan 1929 | Box 19 \ 3 Scan006 | |
| Recommendation to send an experimental 'SS' car to the USA for testing under American conditions. | 21th Jan 1929 | Box 19 \ 3 Scan007 | |
| Cover note from Hs. to Sg. regarding a letter from Mr. Beaver and a proposed reply. | 21th Jan 1929 | Box 19 \ 3 Scan008 | |
| Secret letter from RR America to Derby inquiring about the progress of the new 'SS' chassis development programme and production timeline. | 11th Jan 1929 | Box 19 \ 3 Scan009 | |
| Letter discussing the feasibility of production and delivery schedules for cars commencing in 1930. | 21th Jan 1929 | Box 19 \ 3 Scan010 | |
| Letter from the Experimental Department updating Rolls-Royce America on the progress and advantages of the new 'SS' chassis over the Phantom. | 21th Jan 1929 | Box 19 \ 3 Scan011 | |
| Recommendation to send an experimental car to the U.S.A. for testing. | 21th Jan 1929 | Box 19 \ 3 Scan012 | |
| Letter to Rolls-Royce America detailing the development and advantages of the new 'SS' chassis over the Phantom. | 21th Jan 1929 | Box 19 \ 3 Scan013 | |
| Body schemes for the left-hand 'SS' chassis, recommending bodies be made in England for complete cars sent to America. | 22th Jan 1929 | Box 19 \ 3 Scan014 | |
| The introduction of 'SS' cars and manufacturing plans in America. | 22th Jan 1929 | Box 19 \ 3 Scan015 | |
| Suggesting amendments to a letter regarding the American Company's decision on 'SS' chassis production. | 22th Jan 1929 | Box 19 \ 3 Scan016 | |
| Camshaft drive options for the 'SS' left-hand drive chassis intended for the U.S.A. | 23th Jan 1929 | Box 19 \ 3 Scan017 | |
| Manufacture of experimental left-hand drive 'SG' chassis for the American market and the optimal wheelbase length. | 24th Jan 1929 | Box 19 \ 3 Scan018 | |
| Wheelbase options and seeking input before consulting the American Company. | 24th Jan 1929 | Box 19 \ 3 Scan019 | |
| Design considerations for a shorter, left-hand drive American chassis. | 26th Jan 1929 | Box 19 \ 3 Scan020 | |
| Spare wheel placement and the importance of wheelbase length for sales. | 31th Jan 1929 | Box 19 \ 3 Scan021 | |
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