| Description | Date | Identifier | |
| Proposed modifications and testing for a car being sent to the South of France. | 28th Nov 1930 | Box 19 \ 5 Scan115 | |
| Telegram from Royce requesting immediate testing of the stiffest possible brake drums, especially for his car for France. | 1st Dec 1930 | Box 19 \ 5 Scan116 | |
| Wire confirmation from Royce to Hives requesting an immediate test of stiffer brake drums. | 1st Dec 1930 | Box 19 \ 5 Scan117 | |
| Difficulties of fitting a new centrally vented tank to chassis 27EX due to the existing body construction. | 2nd Dec 1930 | Box 19 \ 5 Scan118 | |
| Progress report on the build of car 27-EX at Park Ward's Works, detailing issues and expected delivery. | 2nd Dec 1930 | Box 19 \ 5 Scan119 | |
| Confirmation to supply a set of GWH brake shoes for car 18-EX. | 2nd Dec 1930 | Box 19 \ 5 Scan120 | |
| Request to fit GWH brake shoes to a car, with Locomotive Type shoes as a backup. | 4th Dec 1930 | Box 19 \ 5 Scan121 | |
| Delivery of AMR.2 Ferodo linings for the rear brakes of vehicle 18-EX. | 5th Dec 1930 | Box 19 \ 5 Scan122 | |
| Sending grey paint to re-paint a wheel cover for car 27-EX. | 12th Dec 1930 | Box 19 \ 5 Scan123 | |
| Letter from coachbuilders Park Ward & Co. Ltd concerning the supply of cellulose for repainting and investigating a roof leak on car 27-EX. | 13th Dec 1930 | Box 19 \ 5 Scan124 | |
| Vehicle performance and fault report from a test drive. | 15th Dec 1930 | Box 19 \ 5 Scan125 | |
| Letter to Park Ward & Co. Ltd. regarding points on the coachwork and sliding roof. | 15th Dec 1930 | Box 19 \ 5 Scan126 | |
| Issues with the spare wheel cover and other faults on car 27-EX. | 15th Dec 1930 | Box 19 \ 5 Scan127 | |
| Weight of an experimental chassis on car 27-EX. | 15th Dec 1930 | Box 19 \ 5 Scan128 | |
| Letter from Park Ward & Co. Ltd confirming the dispatch of spares and an inner tube being sent separately. | 16th Dec 1930 | Box 19 \ 5 Scan129 | |
| Letter from coachbuilder Park Ward & Co. to the Experimental Dept. regarding adjustments to a sliding roof on car 27-EX. | 16th Dec 1930 | Box 19 \ 5 Scan130 | |
| Correspondence regarding a defective spare wheel cover and its return to the coachbuilder, Park Ward & Co. | 17th Dec 1930 | Box 19 \ 5 Scan131 | |
| The estimated weight of the 27-EX chassis. | 17th Dec 1930 | Box 19 \ 5 Scan132 | |
| Confirming instructions to send the spare wheel cover for 27-EX to Park Wards. | 18th Dec 1930 | Box 19 \ 5 Scan133 | |
| Fitting of stiffer brake drums and a single air line petrol gauge. | 18th Dec 1930 | Box 19 \ 5 Scan134 | |
| List of 18 jobs requiring attention on vehicle 27-EX. | 17th Dec 1930 | Box 19 \ 5 Scan135 | |
| Letter from Sir Henry Royce providing feedback and listing seven design faults of a car to Messrs Park Ward & Co. Ltd. | 18th Dec 1930 | Box 19 \ 5 Scan136 | |
| List of vehicle faults including noisy wipers, and issues with inlaid work, finishers, and interior handles, with discussion on rectification. | 22th Dec 1930 | Box 19 \ 5 Scan137 | |
| Road test notes and feedback on the performance and issues of vehicle 27-EX. | 22th Dec 1930 | Box 19 \ 5 Scan138 | |
| Clarifying there is no official disapproval of the front seat of Mr. R's new car, model 27-EX. | 2nd Jan 1931 | Box 19 \ 5 Scan139 | |
| Torque reaction vibrations and engine firing issues, with requests for solutions. | 20th Jan 1931 | Box 19 \ 5 Scan140 | |
| Inquiring about the programme for car 27-EX, intended for R's use in the South of France. | 22th Jan 1931 | Box 19 \ 5 Scan141 | |
| Status of car 27-EX, which is awaiting new parts like twin carburettors and offering it for temporary use. | 23th Jan 1931 | Box 19 \ 5 Scan142 | |
| Telegram from Royce with instructions for modifying a Phantom engine's flywheel and pistons. | 26th Jan 1931 | Box 19 \ 5 Scan143 | |
| Confirmation of a telegram to Royce in France regarding an unmachinable pinion on a crankshaft. | 26th Jan 1931 | Box 19 \ 5 Scan144 | |
| Telegrams and suggestions for the Phantom II, confirming a previous response. | 28th Mar 1931 | Box 19 \ 5 Scan145 | |
| From Dodd to Mr. Hives reporting on vehicle issues, including firing in the silencer and piston knock on car 18-EX. | 6th Feb 1931 | Box 19 \ 5 Scan146 | |
| Technical letter advising on how to increase shock absorber loads for car 18-EX by drilling valves and varying washers. | 12th Feb 1931 | Box 19 \ 5 Scan147 | |
| Note on improving ride quality and controllability by adjusting rear loads and high-pressure valves. | 12th Feb 1931 | Box 19 \ 5 Scan148 | |
| Stores order for despatching adjusting washers and small drills for use on Sir Henry Royce's car. | 12th Feb 1931 | Box 19 \ 5 Scan149 | |
| Reporting missing washers and drills from a shipment for Delco shock absorbers on car 18.EX. | 24th Mar 1931 | Box 19 \ 5 Scan150 | |
| Potential improvements for car 18-EX, focusing on torque reactions and flywheel alterations. | 23th Feb 1931 | Box 19 \ 5 Scan151 | |
| Modifications to car 27-EX for a demonstration visit to Le Canadel. | 3rd Mar 1931 | Box 19 \ 5 Scan152 | |
| Opportunity to see and try car 27-EX and Le Canadel before it is sent away. | 5th Mar 1931 | Box 19 \ 5 Scan153 | |
| Hydraulic shock dampers, including spring pressure adjustments and patent considerations. | 7th Mar 1931 | Box 19 \ 5 Scan154 | |
| From Le Canadel regarding car 18-EX, design work, and plans for a car trial in France. | 19th Mar 1931 | Box 19 \ 5 Scan155 | |
| Letter regarding travel arrangements from Le-Canadel to Derby. | 18th Apr 1931 | Box 19 \ 5 Scan156 | |
| Note regarding Sir Henry Royce's travel arrangements from Le Canadel to West Wittering. | 20th Apr 1931 | Box 19 \ 5 Scan157 | |
| Selecting and preparing a suitable car for 'R.' for use in France, including potential paint modifications. | 20th Nov 1931 | Box 19 \ 5 Scan158 | |
| Sir Henry Segrave's feedback on a Phantom II car and the resulting actions. | 16th Jan 1930 | Box 19 \ 6 Scan001 | |
| Modifications for the Phantom II vehicle and discussions regarding the 'R' engines for a motor boat. | 16th Jan 1930 | Box 19 \ 6 Scan002 | |
| Note regarding development tests of the 'R' engine for a boat and a visit by Sir Henry. | 20th Jan 1930 | Box 19 \ 6 Scan003 | |
| From Sg. to Hs. regarding work on the Sir Henry Segrave project, confirming recommendations. | 20th Jan 1930 | Box 19 \ 6 Scan004 | |
| Design revisions for the radiator, bonnet, and dash of the Continental Touring Car, specifically for the Sir Henry Segrave Phantom II model. | 31th Jan 1930 | Box 19 \ 6 Scan005 | |
| Expressing disappointment with the appearance of Sir Henry Segrave's car and suggesting the use of mock-ups for future designs. | 26th Feb 1930 | Box 19 \ 6 Scan006 | |
| Fitting of Excelsior 'AFA' shock absorbers to Sir Henry Segrave's car. | 4th Mar 1930 | Box 19 \ 6 Scan007 | |
| Confirming arrangements for Sir Henry Segrave's Phantom II car and a viewing of boat engines. | 7th Mar 1930 | Box 19 \ 6 Scan008 | |
| Sir Henry Segrave's report on his Phantom II, covering issues with petrol consumption, tyres, shock absorbers, and wheel wobble. | 11th Aug 1930 | Box 19 \ 6 Scan009 | |
| Phantom II car, No. 80 W.J., detailing engine noise, fuel consumption, and clutch issues. | 11th Aug 1930 | Box 19 \ 6 Scan010 | |
| Dangerous steering wobble or shimmy in the Phantom II at high speeds, refuting claims it is caused by the tyres. | 11th Aug 1930 | Box 19 \ 6 Scan011 | |
| Tyre and springing issues, questioning the fitting of non-adjustable shock absorbers. | 11th Aug 1930 | Box 19 \ 6 Scan012 | |
| Shock absorbers and a comparison of brake performance against a Hispano-Suiza. | 11th Aug 1930 | Box 19 \ 6 Scan013 | |
| Report discussing brake adjustment for racing cars and general feedback on a vehicle's performance. | 10th Mar 1930 | Box 19 \ 6 Scan014 | |
| Report page detailing vehicle road-holding performance, issues with sway and wheel wobble, and a conclusion for internal use. | 10th Mar 1930 | Box 19 \ 6 Scan015 | |
| Fitting of friction shock absorbers to Segrave's car. | 13th Mar 1930 | Box 19 \ 6 Scan016 | |
| From Sg. to Hs. regarding a conversation with Sir Henry Segrave about his 20/25 and 40/50 cars. | 28th Mar 1930 | Box 19 \ 6 Scan017 | |
| Letter from Sir Henry Segrave about a trouble with chassis 80-WJ. | 27th Mar 1930 | Box 19 \ 6 Scan018 | |
| Customer letter regarding an unresolved oil leak on a Phantom II car after a previous repair attempt. | 25th Mar 1930 | Box 19 \ 6 Scan019 | |
| Letter to Sir Henry Segrave regarding a persistent oil leak on chassis 80-WJ. | 27th Mar 1930 | Box 19 \ 6 Scan020 | |
| Request for specific car parts to be tested as soon as possible. | 7th Apr 1930 | Box 19 \ 6 Scan021 | |
| Sir Henry Segrave's upcoming visit to Derby to discuss his Phantom II and observe the starting procedure for his boat engines. | 7th Apr 1930 | Box 19 \ 6 Scan022 | |
| From Sg. to Hs. regarding Sir Henry Segrave, requesting a report and asking about a car. | 10th Apr 1930 | Box 19 \ 6 Scan023 | |
| Proposal to fit and test special stiffer springs on Major Segrave's car and adjust the pivot lean setting. | 11th Apr 1930 | Box 19 \ 6 Scan024 | |
| Steering complaint from Sir Henry Segrave for car 30-WJ, noting an unbalanced wheel and incorrect pivot lean. | 11th Apr 1930 | Box 19 \ 6 Scan025 | |
| Request for an opinion on balancing a pair of wheels and tyres from Major Segrave's car using standard pieces. | 14th Apr 1930 | Box 19 \ 6 Scan026 | |
| Wheel balancing issues with 'India' brand tyres and recommending a procedure for checking them on customer cars. | 14th Apr 1930 | Box 19 \ 6 Scan027 | |
| List of repairs and modifications for Major Segrave's Car 80-WJ. | 14th Apr 1930 | Box 19 \ 6 Scan028 | |
| Investigating a steering complaint by Sir Henry Seagrave, tracing the issue to improperly balanced wheels by the coachbuilder. | 14th Apr 1930 | Box 19 \ 6 Scan029 | |
| Typed letter discussing issues with wheel balance and pivot lean on a car chassis. | 4th Apr 1930 | Box 19 \ 6 Scan030 | |
| Excessive imbalance of 'India' brand tyres from Major Segrave's car, comparing them to Dunlop standards. | 23th Apr 1930 | Box 19 \ 6 Scan031 | |
| Sending a defective 'India' 40/50 HP tyre to London for replacement. | 24th Apr 1930 | Box 19 \ 6 Scan032 | |
| Specifications for an Excelsior 'Afa' Plate Type Rear Damper for an 80-WJ Segrave. | 25th Apr 1930 | Box 19 \ 6 Scan033 | |
| Work on Sir Henry Segrave's car, specifically regarding radiator 'jellying' and payment arrangements. | 25th Apr 1930 | Box 19 \ 6 Scan034 | |
| Confirmation to fit a low inertia crankshaft damper and exhaust heated throttle to vehicle 80-WJ, and to examine pistons for knocks. | 26th Apr 1930 | Box 19 \ 6 Scan035 | |
| Sir Henry Segrave's criticisms of his car, 80-WJ, and comparing its steering performance to another vehicle. | 28th Apr 1930 | Box 19 \ 6 Scan036 | |
| Short note arranging a meeting at Bignall's Corner with cars 80-WJ and 1-WJ. | 1st May 1930 | Box 19 \ 6 Scan037 | |
| Cover memo discussing the good results of a test on radiator jellying and the distribution of the report. | 5th May 1930 | Box 19 \ 6 Scan038 | |
| Solution to a radiator 'jellying' issue on the Phantom II and a London Trials Car. | 2nd May 1930 | Box 19 \ 6 Scan039 | |
| List of modifications and repairs carried out on car 80-WJ, including a note on radiator mounting tests. | 6th May 1930 | Box 19 \ 6 Scan040 | |
| Specifications and calculations for springs used in a centre point radiator mounting. | 6th May 1930 | Box 19 \ 6 Scan041 | |
| The follow-up on a returned 'India' tyre belonging to Major Segrave. | 24th May 1930 | Box 19 \ 6 Scan042 | |
| Instruction to Messrs. Sanderson and Holmes to carry out work on Major Segrave's car, 80-WJ. | 24th Jun 1930 | Box 19 \ 6 Scan043 | |
| The single point radiator mounting modification to cure 'jellying'. | 5th Sep 1930 | Box 19 \ 6 Scan044 | |
| Recommending the replacement of temporary single point radiator mountings with standardised parts for cars 1-WJ and 80-WJ. | 9th Sep 1930 | Box 19 \ 6 Scan045 | |
| Arranging to fit new radiator support fittings to the late Sir Henry Segrave's car. | 13th Sep 1930 | Box 19 \ 6 Scan046 | |
| Replacing experimental centre point radiator mountings with standardized parts. | 15th Sep 1930 | Box 19 \ 6 Scan047 | |
| Availability of cars, including one belonging to the late Sir Henry Segrave, for fitting radiator suspension parts. | 18th Sep 1930 | Box 19 \ 6 Scan048 | |
| Letter to the new owner of the late Sir Henry Segrave's car, regarding a small modification to the radiator support. | 30th Sep 1930 | Box 19 \ 6 Scan049 | |
| Examination report on the rear axle of chassis 80-WJ, noting gear damage due to a lack of oil. | 10th Oct 1930 | Box 19 \ 6 Scan050 | |
| First recorded axle failure on a Phantom II (car 80-WJ) after the latest modifications were fitted. | 11th Oct 1930 | Box 19 \ 6 Scan051 | |
| Confirming that the bevel pinion for chassis number 80-WJ has been removed. | 16th Oct 1930 | Box 19 \ 6 Scan052 | |
| Log of oil capacity, cylinder compression, and power measurements for various chassis numbers. | 10th Apr 1907 | Box 19 \ 7 Scan001 | |
| Engine compression test results, calculating cylinder capacity and recording gauge pressures for 1906 and 1907 type engines. | 10th Apr 1907 | Box 19 \ 7 Scan002 | |
| Test results for engine compression and maximum explosion pressure. | 17th Oct 1907 | Box 19 \ 7 Scan003 | |
| Engine compression test results for various cars. | 24th Aug 1908 | Box 19 \ 7 Scan004 | |
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