| Description | Date | Identifier | |
| Modifications to a Sports Phantom to achieve 100 MPH. | 17th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan063 | |
| Complaints and proposed solutions for Phantom & 20HP models regarding springing, brake servo, and throttle sticking. | 18th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan064 | |
| Steering, heat, and wobble defects on a chassis and the proposed solutions. | 18th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan065 | |
| The analysis and proposed solutions for failing 20HP side steering tubes. | 18th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan066 | |
| Request to arrange the fitting of a spare wheel and luggage carrier to car 7.EX for Mr. Royce. | 19th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan067 | |
| Requesting technical details about the unsatisfactory steering on Mr. Royce's Car 7-EX. | 20th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan068 | |
| Confirming a phone conversation about proposed alterations to the Phantom model to address complaints. | 20th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan069 | |
| Providing feedback on the performance of experimental cars 8-EX and 7-EX, detailing impressions and required modifications. | 22th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan070 | |
| Use of ball and roller bearings and throttle alteration for the Phantom Throttle Governor. | 22th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan071 | |
| Requesting vehicle modifications and checks for car 7-EX, including wheel carriers, auto advance, and dampers. | 24th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan072 | |
| Confirming an agreement to increase piston ring pressure and dimensions. | 25th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan073 | |
| Company policy, advocating for production flexibility and perfection over low-cost specialisation. | 25th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan074 | |
| List of required work and noted faults on the 7EX Allweather car before it is sent to France. | 25th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan075 | |
| Letter to coachbuilder Barker & Co Ltd detailing issues with Mr. Royce's car, including leaks, squeaks, and door strap problems. | 23th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan076 | |
| Letter detailing outstanding bodywork faults on a car and arranging for their rectification. | 25th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan077 | |
| Test results and comparison of a Packard Straight 8 engine against the company's own 6-cylinder designs. | 25th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan078 | |
| The difficulty in designing a body for chassis EAC. 7 and suggesting temporary alternatives. | 25th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan079 | |
| Modified bonnet fastener design for the Phantom model and a request to fit them to Mr. Royce's car. | 25th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan080 | |
| Front wheel braking and steering, proposing a reduction in front brake bias and servo effectiveness. | 25th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan081 | |
| Proposed improvements for the 10-EX Blue Semi-Sports Car, including engine and bodywork modifications. | 26th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan082 | |
| Modifying Phantom steering box lubrication compared to the old Silver Ghost model. | 26th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan083 | |
| Proposing a heat shield for the Phantom model's exhaust silencer to address complaints of excessive heat. | 26th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan084 | |
| Issues with bonnet fastenings and proposing improvements with a new cast dash design. | 26th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan085 | |
| Trip with a 10-EX chassis, proposed model improvements, and designs for new petrol pump systems. | 29th Nov 1926 | West Wittering \ P \ 2October1926-December1926 Scan086 | |
| Development and advantages of a new cast dash and bonnet design. | 1st Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan087 | |
| Modifications to the servo brake mechanism to reduce front braking power. | 1st Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan088 | |
| Modifications and concerns regarding the 20HP chassis, including body weight, back axle ratio, and engine improvements. | 3rd Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan089 | |
| Confidential memo discussing the merits and drawbacks of six and eight-cylinder engines, referencing Packard and Daimler. | 3rd Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan090 | |
| Alternative back axle ratios for the 'India Back Axle', suggesting the 10/47 gear be tried first. | 7th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan091 | |
| Proposed body modifications for car 10-EX under scheme 2307. | 7th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan092 | |
| With a sketch proposing tests for new induction pipes for the Phantom. | 4th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan093 | |
| Proposed new front axle control for the Phantom model and an urgent related experiment. | 4th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan094 | |
| Drawing LeC.2330 for a Phantom direct drive starter motor and a change in its positioning. | 6th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan095 | |
| Modifications to the Phantom's engine torque damper and timing case as per Mr. Royce's instructions. | 9th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan096 | |
| Modifications and an improved fastener for the Phantom Bonnet. | 9th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan097 | |
| Design changes for a new, more silent Phantom Magneto and its application to the 20HP model. | 10th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan098 | |
| Outlining proposed coachwork modifications for the Experimental Phantom 10-EX at Barkers. | 11th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan099 | |
| Chassis modifications, including fitting a new pendulum lever cover, petrol tank, and a distant reading petrol gauge. | 11th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan100 | |
| The need for a more explanatory and up-to-date list of recommended accessories. | 13th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan101 | |
| Adjustments to the brake distribution and servo system for 40/50 and 20HP models to improve safety. | 13th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan102 | |
| Use of double shock dampers on 40/50 & 20HP cars for high-speed use. | 13th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan103 | |
| Requirements for coachwork, including a light saloon body for 20HP cars and a high-speed open Phantom. | 13th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan104 | |
| Modifications to the Phantom front axle control, substituting the standard shock damper for the spring control version. | 14th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan105 | |
| Experimental 'stream line' oil filter and its functionality, sent for testing. | 15th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan106 | |
| Oversight and suggested modifications to the EAC 7 chassis brake operation. | 16th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan107 | |
| Drawing LeC. 2334 and the associated modifications for a Phantom starter motor. | 16th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan108 | |
| Proposed bonnet improvements dependant on the use of a stiffened cast dashboard for the Phantom model. | 17th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan109 | |
| Friction in the steering of the 20HP car and proposing a design for a spring-loaded cross steering tube joint. | 17th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan110 | |
| Standardisation and testing of an improved side steering tube for a 20HP vehicle. | 17th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan111 | |
| The new Phantom bonnet, suggesting a trial using the fasteners as handles to save on fittings. | 17th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan112 | |
| With a sketch requesting a closer fit for a Phantom starter's ball bearing housing to prevent dirt ingress. | 18th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan113 | |
| Standardization of the rear wheel and luggage carrier on the Phantom 7-EX. | 21th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan114 | |
| Ignition wire fittings and potential modifications to the induction manifold. | 20th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan115 | |
| Car body design, advocating for light, fixed-roof bodies over open-car styles like the Beatonson head. | 22th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan116 | |
| The policy for naming a new 750 HP, 12-cylinder aero engine. | 21th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan117 | |
| A.I.D. (Aeronautical Inspection Directorate) inspection certificate for an aero engine and spares. | 18th Feb 1928 | West Wittering \ P \ 2October1926-December1926 Scan118 | |
| Design of a lock for the Phantom revised bonnet. | 22th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan119 | |
| Adapting Phantom model radiator shutters and controls for the 20HP model. | 22th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan120 | |
| Modifications to rear shock dampers to increase ground clearance. | 22th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan121 | |
| Car appearance, specifically regarding radiators, shutters, and bonnets. | 22th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan122 | |
| Technical query regarding the behavior of valve bounce on a test rig. | 22th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan123 | |
| New, more flexible spring for the revised Phantom bonnet fastener. | 23th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan124 | |
| Experiments and proposed modifications to the Phantom front axle control, specifically increasing the lever length from 12' to 14'. | 23th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan125 | |
| Standardisation of spherical unions and a proposal for a revised drawing. | 24th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan126 | |
| Proposal for the EAC 7 starter motor design. | 24th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan127 | |
| Design and urgent production of lightened union connections for aero work. | 28th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan128 | |
| The design progress and delay of roller-less valve rockers. | 4th Jan 1927 | West Wittering \ P \ 2October1926-December1926 Scan129 | |
| Modification to the 20HP battery suspension tube to accommodate a subframe. | 31th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan130 | |
| Visit of chassis EAC. 7 to France and a list of proposed technical improvements. | 4th Jan 1927 | West Wittering \ P \ 2October1926-December1926 Scan131 | |
| List of proposed final improvements for an engine, gearbox, back axle and chassis frame. | 31th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan132 | |
| Contentions about chassis inertia and spring periodicity, with plans to address riding qualities. | 31th Dec 1926 | West Wittering \ P \ 2October1926-December1926 Scan133 | |
| Suitable materials for piston ring stops. | 1st Jul 1926 | West Wittering \ P \ July1926-September1926 Scan001 | |
| Unsuitability of taper bolts for securing the flywheel to the crankshaft flange. | 1st Jul 1926 | West Wittering \ P \ July1926-September1926 Scan002 | |
| Responsibility for coachwork modifications and suggesting improvements to body construction methods. | 1st Jul 1926 | West Wittering \ P \ July1926-September1926 Scan003 | |
| Modifications to the Phantom front axle to improve its strength. | 1st Jul 1926 | West Wittering \ P \ July1926-September1926 Scan004 | |
| Wire confirmation regarding the return of an experimental chassis to Derby. | 2nd Jul 1926 | West Wittering \ P \ July1926-September1926 Scan005 | |
| Listing 15 improvements for testing on the 7-EX Chassis in France. | 2nd Jul 1926 | West Wittering \ P \ July1926-September1926 Scan006 | |
| Drawings for ignition controls, advance curves, and an ignition differential mechanism. | 3rd Jul 1926 | West Wittering \ P \ July1926-September1926 Scan007 | |
| Ignition controls, advance curves, and associated drawings LeCs. 2262 & 2265. | 3rd Jul 1926 | West Wittering \ P \ July1926-September1926 Scan008 | |
| Methods for carburettor throttle heating using super-heated water or steam to avoid a valve in the exhaust. | 5th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan009 | |
| Proposal to adapt the Phantom switchbox for battery and magneto ignition, including a diagram of new switch markings and functions. | 5th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan010 | |
| Design proposals for a lighter Phantom engine valve rocker cover. | 6th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan011 | |
| Fitting of hydraulic shock dampers on the rear of a vehicle. | 6th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan012 | |
| Scheme to reverse the carburetter mixture control and alter the ignition controls. | 6th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan013 | |
| Modifications to 20HP undershields to mitigate mud splashing and increase road clearance. | 7th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan014 | |
| Drawing LeC. 2267 for a lightened aluminium cylinder head water outlet for the Phantom engine. | 6th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan015 | |
| Mr. Royce's remarks on the manufacturing and machining process for the EAC clutch arrangement. | 7th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan016 | |
| Recommending lead bronze bushes and stainless steel to prevent parts from seizing and rusting. | 7th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan017 | |
| Various fitting methods and stiffness issues of the 20HP steering column support. | 7th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan018 | |
| From 'E' to 'HS' conveying Mr. Royce's opinion to not test a jacket heating system for Phantom engine carburetter throttles. | 10th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan019 | |
| Modifications to the front axle forging and brake gear for future production. | 10th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan020 | |
| Approval of schemes for float chamber cover locking devices for Phantom & 20HP models. | 12th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan021 | |
| Requesting the urgent production of a plate for reinforcing the scuttle armature on specific vehicles. | 12th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan022 | |
| The 20HP steering column support and its application on cars with small columns and isolated scuttles. | 15th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan023 | |
| The implementation of a self-supporting 20HP steering column from a coachbuilding perspective. | 9th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan024 | |
| The superior steering and riding of the 10-EX sports car, with suggestions for improvements to other models. | 12th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan025 | |
| Investigation into the causes and potential solutions for overheating in the interior of closed Phantom cars. | 14th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan026 | |
| Suggestion for an experiment to measure heat sources affecting the floorboards of a car, including a sketch of a thin steel shield. | 11th Aug 1920 | West Wittering \ P \ July1926-September1926 Scan027 | |
| Chassis enquiry and the supply of stiffeners and subframe supports to be fitted. | 15th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan028 | |
| Proposed scheme (N.Sch.2233) to stiffen 'jellying' scuttles on Phantom models. | 15th Jul 1926 | West Wittering \ P \ July1926-September1926 Scan029 | |
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