| Description | Date | Identifier | |
| From 'R' discussing his personal preferences and suggestions for car coachwork. | 13th Dec 1926 | Box 71 \ 1 scan0271 | |
| Advantages of fixed roof bodies over open car heads and proposing trials for new body types. | 22th Dec 1926 | Box 71 \ 1 scan0272 | |
| Proposed design changes to the 40/50 model bonnet and radiator. | 3rd Jan 1927 | Box 71 \ 1 scan0273 | |
| Sketches and notes comparing integral and non-integral bonnet, scuttle, and radiator designs. | 3rd Jan 1927 | Box 71 \ 1 scan0274 | |
| Potential radiator design modifications for improved appearance and cooling efficiency. | 5th Jan 1927 | Box 71 \ 1 scan0275 | |
| Letter proposing to fit a body onto a second-hand 40/50 HP chassis (No. 158-AG) for resale. | 5th Jan 1927 | Box 71 \ 1 scan0276 | |
| Progress and delays of experimental car bodies for the 40/50 HP and 20 HP models. | 6th Jan 1927 | Box 71 \ 1 scan0277 | |
| Importance of weight reduction in the 40/50 and 20 HP models for performance, legal compliance, and handling. | 1st Feb 1927 | Box 71 \ 1 scan0278 | |
| The aesthetics and cost-effectiveness of fabric-covered car bodies. | 18th Feb 1927 | Box 71 \ 1 scan0279 | |
| Internal instruction to arrange work on an experimental car by Sanderson & Holmes Ltd. | 18th Feb 1927 | Box 71 \ 1 scan0280 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on car 9-EX as per an attached estimate. | 1st Feb 1927 | Box 71 \ 1 scan0281 | |
| Telegram received by telephone confirming a car body will be ready on Thursday afternoon. | 9th Mar 1927 | Box 71 \ 1 scan0282 | |
| Instruction memo to Messrs. Sanderson & Holmes Ltd. to carry out work on an experimental car. | 28th Mar 1927 | Box 71 \ 1 scan0283 | |
| Comparing the quality and performance of English versus French car coachwork, particularly under French road conditions. | 29th Mar 1927 | Box 71 \ 1 scan0284 | |
| Quality of English bodywork, chassis shortcomings, and potential improvements for car models. | 4th Apr 1927 | Box 71 \ 1 scan0285 | |
| 'jellying' or flexing of the scuttle on a Barker Phaeton and a proposed structural solution. | 11th Apr 1927 | Box 71 \ 1 scan0286 | |
| Cover note attaching a document concerning coachwork. | 11th Apr 1927 | Box 71 \ 1 scan0287 | |
| The condition of a Barker Cabriolet body after extensive mileage and a defence of English coachwork. | 11th Apr 1927 | Box 71 \ 1 scan0288 | |
| Comparing English and foreign coachwork, including pricing, design suitability, and suggestions. | 12th Apr 1927 | Box 71 \ 1 scan0289 | |
| Holding coachwork to the same high quality standards as the chassis to avoid noise and discomfort. | 12th Apr 1927 | Box 71 \ 1 scan0290 | |
| Criticising the acceptance of faults in coachwork and fittings, using the 20 HP car 10-G-111 as an example. | 15th Apr 1927 | Box 71 \ 1 scan0291 | |
| Poor riding qualities of a car with a french body following Mr. Brewster's visit. | 15th Apr 1927 | Box 71 \ 1 scan0292 | |
| Internal instruction memo to authorise work on an experimental car by Sanderson & Holmes Ltd. | 28th Apr 1927 | Box 71 \ 1 scan0293 | |
| Redesign of car steps to better suit its streamline appearance. | 1st May 1927 | Box 71 \ 1 scan0294 | |
| Tests conducted on a rear silencer heat shield to reduce interior overheating in Phantom cars. | 25th May 1927 | Box 71 \ 1 scan0295 | |
| Page discussing the adoption of a heat shield and related precautions for coachbuilders. | 31th May 1927 | Box 71 \ 1 scan0296 | |
| Specification for a permanent luggage box and passenger capacity. | 31th May 1927 | Box 71 \ 1 scan0297 | |
| Quality and appearance of English versus French coachwork and the Weymann body. | 27th Apr 1927 | Box 71 \ 1 scan0298 | |
| Lightening coachwork, the introduction of 'Barkerlite', and a comparison of French versus English coachbuilding quality. | 27th Apr 1927 | Box 71 \ 1 scan0299 | |
| Standardisation of a baffle on the silencer to reduce heat in the body. | 25th May 1927 | Box 71 \ 1 scan0300 | |
| Standardisation record for a chassis part, detailing implementation and costs. | 2nd Oct 1927 | Box 71 \ 1 scan0301 | |
| Authorising work to be carried out on a 40 HP Touring Car by Sanderson & Holmes Ltd. | 1st Aug 1927 | Box 71 \ 1 scan0302 | |
| Repair estimate for an experimental car required as evidence in Police Court proceedings. | 12th Aug 1927 | Box 71 \ 1 scan0303 | |
| Necessity of tiebars for the open touring car model 10-EX. | 20th Aug 1927 | Box 71 \ 1 scan0304 | |
| Internal memorandum discussing the development, testing, and market placement of a new Sports Model car. | 26th Aug 1927 | Box 71 \ 1 scan0305 | |
| Confidential memo requesting design feedback on a new car body, focusing on aerodynamics, wheel placement, and weight considerations for sporty drivers. | 27th Aug 1927 | Box 71 \ 1 scan0306 | |
| Confidential note from 'C' to 'Hs' seeking design advice for a new sports model, focusing on aerodynamics and coachwork. | 27th Aug 1927 | Box 71 \ 1 scan0307 | |
| Internal instruction to arrange work on the 10-EX car with Sanderson & Holmes Ltd. | 9th Sep 1927 | Box 71 \ 1 scan0308 | |
| The Brooklands performance tests of the 10-EX car compared to a standard 40/50 touring car. | 6th Sep 1927 | Box 71 \ 1 scan0309 | |
| Vehicle performance testing, analyzing speed, engine RPM, and the effects of aerodynamic and mechanical modifications. | 6th Sep 1927 | Box 71 \ 1 scan0310 | |
| General remarks on the performance of the 10-EX car, covering suspension, steering, and the autovac system. | 6th Sep 1927 | Box 71 \ 1 scan0311 | |
| Performance comparison of chassis 10-EX and 46-PK, detailing maximum speeds and acceleration tests. | 6th Sep 1927 | Box 71 \ 1 scan0312 | |
| Table comparing car speeds in m.p.h. over a full lap and half mile under various configurations. | 7th Sep 1927 | Box 71 \ 1 scan0313 | |
| Chart showing gain or loss in lap speed (MPH) for the 10 E.X. model under various configurations. | 7th Sep 1927 | Box 71 \ 1 scan0314 | |
| Performance graph showing Brake Horsepower and Road Wheel HP against Engine RPM for an experimental aluminium engine. | 7th Sep 1927 | Box 71 \ 1 scan0315 | |
| Required improvements for a Sports Phantom engine and car before production. | 1st Sep 1927 | Box 71 \ 1 scan0316 | |
| Technical memorandum detailing development requirements and modifications for the Sports Phantom engine and car. | 10th Sep 1927 | Box 71 \ 1 scan0317 | |
| The feasibility of designing a lightweight Sports body, contrasting it with an older experimental body. | 9th Sep 1927 | Box 71 \ 1 scan0318 | |
| Design, weight, and aerodynamic features of the 10-EX sports car body. | 13th Sep 1927 | Box 71 \ 1 scan0319 | |
| Coachbuilder designs for a special body, focusing on weight reduction, wheel placement, and other features for the 10-EX model. | 14th Sep 1927 | Box 71 \ 1 scan0320 | |
| Contracting coachbuilder Jarvis of Wimbledon to produce a sample sports body. | 9th Sep 1927 | Box 71 \ 1 scan0321 | |
| Strategy for developing a suitable sports car body for the 10-EX model. | 20th Sep 1927 | Box 71 \ 1 scan0322 | |
| Progress on the body and engine design for a new sports car. | 20th Sep 1927 | Box 71 \ 1 scan0323 | |
| Engine and chassis improvements, including weight reduction and performance enhancements. | 20th Sep 1927 | Box 71 \ 1 scan0324 | |
| Note discussing the need for Mr. Wormald's assistance to shorten a delay. | 21th Sep 1927 | Box 71 \ 1 scan0325 | |
| Design, coachbuilding, and personnel issues for the Sports Phantom project. | 21th Sep 1927 | Box 71 \ 1 scan0326 | |
| Visit to coachbuilder Jarvis & Sons Ltd. concerning the potential construction of lightweight sports bodies. | 25th Sep 1925 | Box 71 \ 1 scan0327 | |
| The proposed body and coachwork for the first Sports Phantom chassis. | 5th Oct 1927 | Box 71 \ 1 scan0328 | |
| Coachwork specification for a Phantom Sports four-seater vehicle. | 1st Oct 1927 | Box 71 \ 1 scan0329 | |
| Addition to a specification concerning the maximum weight of coachwork. | 4th Oct 1927 | Box 71 \ 1 scan0330 | |
| Specification sheet detailing requirements for a vehicle's bodywork and fittings. | 4th Oct 1927 | Box 71 \ 1 scan0331 | |
| Print of the new 10-EX body. | 11th Oct 1927 | Box 71 \ 1 scan0332 | |
| Internal instruction to authorise work on the 10-EX experimental car by Sanderson & Holmes Ltd. | 18th Oct 1927 | Box 71 \ 1 scan0333 | |
| Instruction memo to proceed with work on the 8-EX experimental car as per an attached estimate. | 19th Oct 1927 | Box 71 \ 1 scan0334 | |
| Request to Barkers Coachbuilders for a sample of grey paint used on Mr. Royce's car 7-EX. | 19th Oct 1927 | Box 71 \ 1 scan0335 | |
| Urgent requirement for a new chassis print and listing special features for a Sports Phantom EAC.14. | 19th Oct 1927 | Box 71 \ 1 scan0336 | |
| List of vehicle components and an instruction to avoid using the term 'sports chassis'. | 20th Oct 1927 | Box 71 \ 1 scan0337 | |
| Letter from coachbuilders Barker & Co. regarding a grey paint sample for Mr. Royce's Torpedo Cabriolet. | 20th Oct 1927 | Box 71 \ 1 scan0338 | |
| Chassis modifications for the Sports Phantom, including a shorter bonnet and changes to save body space. | 20th Oct 1927 | Box 71 \ 1 scan0339 | |
| Benefits of mounting car bodies on rubber seatings to reduce vibrations and resist road shocks. | 1st Oct 1927 | Box 71 \ 1 scan0340 | |
| Confidential memo requesting the blueprint for the Sports Model to commence work on the bodies. | 26th Oct 1927 | Box 71 \ 1 scan0341 | |
| Confirming the production schedule for two Sports Phantom bodies. | 27th Oct 1927 | Box 71 \ 1 scan0342 | |
| The colour scheme, fitting a friction damper, and arranging a trial run for car 14-EX for Le Canadel. | 27th Oct 1927 | Box 71 \ 1 scan0343 | |
| Letter from coachbuilder Barker & Co. regarding a paint sample for Mr. Royce's All Weather car. | 27th Oct 1927 | Box 71 \ 1 scan0344 | |
| The delay of sports car tests due to the bodies not being ready and the plan for alternative testing. | 29th Oct 1927 | Box 71 \ 1 scan0345 | |
| The completion of coachbuilder drawings for the Sports Model. | 29th Oct 1927 | Box 71 \ 1 scan0346 | |
| Modifications for two sports cars, covering the brakes lever, rear spring, and instruments. | 31th Oct 1927 | Box 71 \ 1 scan0347 | |
| Requesting the distribution of prints for coachwork being built for the first two Sports Chassis. | 1st Oct 1927 | Box 71 \ 1 scan0348 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on experimental car 14-EX as per an attached estimate. | 11th Nov 1927 | Box 71 \ 1 scan0349 | |
| Confidential memo discussing the schedule for a 10,000-mile sports car test to expedite its market launch. | 1st Nov 1927 | Box 71 \ 1 scan0350 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on a car based on an attached estimate. | 1st Nov 1927 | Box 71 \ 1 scan0351 | |
| Programme and timeline for a new sports car, including chassis completion, testing, and bodywork. | 11th Nov 1927 | Box 71 \ 1 scan0352 | |
| Stiffness of springs and axle clearance to avoid hitting the buffers. | 11th Nov 1927 | Box 71 \ 1 scan0353 | |
| Instruction memo to carry out work on the experimental car 10-EX. | 12th Nov 1927 | Box 71 \ 1 scan0354 | |
| The specifications and testing requirements for forward body support springs. | 12th Nov 1927 | Box 71 \ 1 scan0355 | |
| Secret memo detailing the progress and issues with various coachbuilders constructing a Sports Body. | 18th Nov 1927 | Box 71 \ 1 scan0356 | |
| Instruction to Sanderson & Holmes Ltd. to carry out work on chassis 9-EX as per an attached estimate. | 23th Nov 1927 | Box 71 \ 1 scan0357 | |
| Dummy chassis for a Sports Model, and fitting a body to the 10,000 miles chassis for a test. | 25th Nov 1927 | Box 71 \ 1 scan0358 | |
| Need for lower and lighter car bodies to improve performance and vehicle dynamics. | 28th Nov 1927 | Box 71 \ 1 scan0359 | |
| Proposed modifications for Phantom power development to increase performance. | 28th Nov 1927 | Box 71 \ 1 scan0360 | |
| Letter to Hooper & Co Ltd regarding the design and manufacture of a Phantom Sports body. | 30th Nov 1927 | Box 71 \ 1 scan0361 | |
| Letter to coachbuilder Barker & Co. Ltd. outlining disagreements on a sports car body design. | 1st Dec 1927 | Box 71 \ 1 scan0362 | |
| Specifications for bodywork, seating, and hood, with a request for the weight of various components. | 1st Dec 1927 | Box 71 \ 1 scan0363 | |
| Letter confirming an agreement to fit a detachable hood to a Sports Phantom car, with enclosed dashboard details. | 1st Dec 1927 | Box 71 \ 1 scan0364 | |
| 10,000-mile test of a fabric-covered body on a 20 HP chassis and sourcing an ideal body for a 40/50 HP. | 1st Dec 1927 | Box 71 \ 1 scan0365 | |
| Requesting to expedite the production of sports bodies and asking for an opinion on a second dummy. | 1st Dec 1927 | Box 71 \ 1 scan0366 | |
| Coachbuilder delivery schedules and production plans for sports bodies. | 30th Nov 1927 | Box 71 \ 1 scan0367 | |
| Comparison of completion dates for sports bodies from coachbuilders Barker, Hooper, and Jarvis. | 28th Nov 1927 | Box 71 \ 1 scan0368 | |
| Instructing the Experimental Department to commission work from Messrs. Sanderson & Holmes Ltd. | 1st Dec 1927 | Box 71 \ 1 scan0369 | |
| Request to supply two louvered panels for testing the ventilation of the 10-EX front driving seats. | 12th Dec 1927 | Box 71 \ 1 scan0370 | |
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