| Description | Date | Identifier | |
| Confirmation of a telegram cancelling a request for a car as an alternative vehicle was available. | 23th Jul 1925 | Box 69 \ 3 scan0303 | |
| Request for a quotation to carry out repairs on experimental car 93-NK, addressed to a coachbuilder. | 11th Aug 1925 | Box 69 \ 3 scan0304 | |
| Continuation of a list of vehicle repair tasks including work on wings, running boards, and bodywork. | 14th Aug 1925 | Box 69 \ 3 scan0305 | |
| 'PN' to 'Hs' requesting the loan of a car for a trip to France. | 14th Aug 1925 | Box 69 \ 3 scan0306 | |
| Provision of a car to P.N. for an extended test period, suggesting a 20HP model with experimental front brakes to accumulate mileage. | 1st Aug 1925 | Box 69 \ 3 scan0307 | |
| Proposal to fit an aluminium casting to prevent hot air and gases from leaking into the car body via the change speed gate. | 20th Aug 1925 | Box 69 \ 3 scan0308 | |
| Arrangement of an experimental closed-type 'New Phantom' car for a run. | 20th Aug 1925 | Box 69 \ 3 scan0309 | |
| The collection of car 46-PK for the fitting of a new steering system and other improvements. | 20th Aug 1925 | Box 69 \ 3 scan0310 | |
| Wire confirmation regarding the availability of the new Phantom. | 20th Aug 1925 | Box 69 \ 3 scan0311 | |
| Advising of a two-week delay for a New Phantom car due to the experimental status of its new speed and brake levers. | 25th Aug 1925 | Box 69 \ 3 scan0312 | |
| Confirming the fitting of a new exhaust system to a New Phantom Open Touring Car. | 25th Aug 1925 | Box 69 \ 3 scan0313 | |
| Instructions for modifications to the New Phantom model, focusing on steering and shock dampers. | 31th Aug 1925 | Box 69 \ 3 scan0314 | |
| Modifications to car 8-EX for a 10,000-mile test in France on the New Phantom. | 1st Sep 1925 | Box 69 \ 3 scan0315 | |
| New parts for Chassis 8-EX for a 10,000 miles test. | 14th Sep 1925 | Box 69 \ 3 scan0316 | |
| Modifications to various vehicle components. | 14th Sep 1925 | Box 69 \ 3 scan0317 | |
| Continued list of parts and modifications, including spare wheel carriers, brake rods, and various electrical components. | 1st Sep 1925 | Box 69 \ 3 scan0318 | |
| Six agreed-upon modifications for a Phantom vehicle following a visit. | 1st Sep 1925 | Box 69 \ 3 scan0319 | |
| Modifications for Speed Models on short chassis. | 23th Sep 1925 | Box 69 \ 3 scan0320 | |
| Modifications for the 8-EX car before a 10,000-mile test. | 24th Sep 1925 | Box 69 \ 3 scan0321 | |
| List of twelve specified modifications for the 'Next Phantom for France', focusing on weight reduction and component updates. | 29th Sep 1925 | Box 69 \ 3 scan0322 | |
| Short memo updating on the completion status of a Phantom chassis. | 28th Sep 1925 | Box 69 \ 3 scan0323 | |
| Dynamometer test report for engine 8-EAC-11. | 1st Oct 1925 | Box 69 \ 3 scan0324 | |
| Table of performance data showing HP calculations at various speeds and loads, with notes on gear and cutout status. | 6th Oct 1925 | Box 69 \ 3 scan0325 | |
| List of modifications for the 'Z' series car and the next car scheduled for testing in France. | 6th Oct 1925 | Box 69 \ 3 scan0326 | |
| Continued list of numbered specifications for various vehicle components. | 6th Oct 1925 | Box 69 \ 3 scan0327 | |
| List of modifications for a Phantom engine 'Z' series car for a 10,000-mile test in France. | 6th Oct 1925 | Box 69 \ 3 scan0328 | |
| The performance of a Phantom car at Brooklands. | 12th Oct 1925 | Box 69 \ 3 scan0329 | |
| E.A.C. performance tests, comparing the acceleration of a New Phantom against an old Silver Ghost. | 12th Oct 1925 | Box 69 \ 3 scan0330 | |
| Page comparing the performance of a Phantom against a Silver Ghost, focusing on carburation, weight and windage. | 12th Jun 1925 | Box 69 \ 3 scan0331 | |
| Series of five graphs detailing vehicle performance tests conducted at Brooklands on a 5 Seater Barker Open Touring Body, chassis 98 N.K. | 12th Oct 1925 | Box 69 \ 3 scan0332 | |
| Issues with 14-tooth axles on experimental cars and the preference for 15-tooth axles. | 14th Oct 1925 | Box 69 \ 3 scan0333 | |
| From 'R.' detailing modifications for the New Phantom model's chassis, suspension, and steering. | 15th Oct 1925 | Box 69 \ 3 scan0334 | |
| Reducing weight on the 'Phantom' model by using the shorter chassis. | 1st Oct 1925 | Box 69 \ 3 scan0335 | |
| Modifications to the New Phantom model, proposing a new symbol 'EAC.S.' for the updated gearbox and frame design. | 20th Oct 1925 | Box 69 \ 3 scan0336 | |
| List of proposed alterations and improvements to vehicle components. | 20th Oct 1925 | Box 69 \ 3 scan0337 | |
| Necessity of the long type chassis based on Phantom sales figures. | 22th Oct 1925 | Box 69 \ 3 scan0338 | |
| On the performance of Phantom cars, potential chassis weight reduction, shock absorber development, and a review of a Weyman body. | 27th Oct 1925 | Box 69 \ 3 scan0339 | |
| From 'R.' detailing progress on design and experimental work for components including EAC.2, EAC.8, RR. E.16, and a new epicyclic gear. | 2nd Nov 1925 | Box 69 \ 3 scan0340 | |
| Parts required to complete chassis X.8770, an enclosed limousine at Hoopers. | 11th Nov 1925 | Box 69 \ 3 scan0341 | |
| Improvements for the new Phantom engine, including induction, cooling, and steering. | 16th Nov 1925 | Box 69 \ 3 scan0342 | |
| Page 2 of an experimental report discussing gearbox, steering, and connecting rod modifications. | 16th Nov 1925 | Box 69 \ 3 scan0343 | |
| Cover sheet for a reminder list of experiments concerning the 20HP & 40/50HP Chassis. | 19th Nov 1925 | Box 69 \ 3 scan0344 | |
| Log of experiments conducted on the 40/50HP chassis. | 31th Aug 1925 | Box 69 \ 3 scan0345 | |
| Log of modifications and drawings with issue dates, drawing numbers, and authority. | 31th Aug 1925 | Box 69 \ 3 scan0346 | |
| From Mr. Royce detailing a list of proposals for reducing the weight of the Phantom engine. | 21th Nov 1925 | Box 69 \ 3 scan0347 | |
| List of proposed design modifications for an engine, specifically concerning the crankcase, studs, and valve gear cover. | 21th Nov 1925 | Box 69 \ 3 scan0348 | |
| Design modifications for an aluminium head and crankcase, with an accompanying sketch. | 27th Nov 1925 | Box 69 \ 3 scan0349 | |
| Summary of complaints regarding the New Phantom and recommending improvements to future reporting. | 27th Nov 1925 | Box 69 \ 3 scan0350 | |
| Request to take delivery of a 'Phantom' car before Christmas, confirming it will be a standard model. | 30th Nov 1925 | Box 69 \ 3 scan0351 | |
| Confirmation of a wire regarding a car delivery delay due to waiting for Triplex glass. | 30th Nov 1925 | Box 69 \ 3 scan0352 | |
| Cover memo for a reminder list of experiments on the 20-HP and 40/50 HP chassis which may affect future production. | 4th Dec 1925 | Box 69 \ 3 scan0353 | |
| Log sheet detailing a series of chassis experiments for the 40/50 HP model. | 9th Dec 1925 | Box 69 \ 3 scan0354 | |
| Listing revised alterations to reduce the weight of the Phantom Engine. | 9th Dec 1925 | Box 69 \ 3 scan0355 | |
| Weight reductions by altering materials and design for various engine components, including for a new experimental Phantom engine. | 23th Nov 1925 | Box 69 \ 3 scan0356 | |
| Issues with the Phantom engine, including run-on after switch-off, cooling system tests, detonation and fuel system comparisons. | 9th Dec 1925 | Box 69 \ 3 scan0357 | |
| Issues with clutch shuddering and stopping, page 2. | 9th Dec 1925 | Box 69 \ 3 scan0358 | |
| Experimental work on the Phantom chassis, covering steering, shock absorbers, bonnets, and the petrol feed system. | 10th Dec 1925 | Box 69 \ 3 scan0359 | |
| Continued memo discussing carburetter suction from a fire risk perspective and its effect on engine performance. | 21th Dec 1925 | Box 69 \ 3 scan0360 | |
| Listing experimental parts fitted to the 46-PK CAR. | 21th Dec 1925 | Box 69 \ 3 scan0361 | |
| The lubrication system of the 8-EX car, discussing piston rings and oil consumption. | 21th Dec 1925 | Box 69 \ 3 scan0362 | |
| Licensing of a 20HP car, promised by Mr. Royce for a honeymoon, and parts for chassis 46-PK. | 22th Dec 1925 | Box 69 \ 3 scan0363 | |
| Requesting the dispatch of a missing rear windscreen and side curtains for Chassis No. 46-PK. | 30th Dec 1925 | Box 69 \ 3 scan0364 | |
| Missing parts for car RE 46-PK, which were left at West Wittering. | 30th Dec 1925 | Box 69 \ 3 scan0365 | |
| Reply to remarks on experimental reports for the New Phantom 10,000 miles test, concerning steering, controls, and headlights. | 1st Dec 1925 | Box 69 \ 3 scan0366 | |
| Experimental tests and faults concerning various vehicle components including the carburetter, brakes, clutch, and springs. | 1st Dec 1925 | Box 69 \ 3 scan0367 | |
| Various investigations into a test car's oil consumption, slipper wheel, bonnet fittings, and tappet noise. | 1st Dec 1925 | Box 69 \ 3 scan0368 | |
| Dispatch of 4 celluloid side curtains and one rear glass screen for chassis 46-PK. | 2nd Jan 1926 | Box 69 \ 4 scan0001 | |
| Arranging a car for Sir James Percy's trip to the South of France. | 5th Jan 1926 | Box 69 \ 4 scan0002 | |
| Availability of an experimental car in France for Sir James Percy. | 7th Jan 1926 | Box 69 \ 4 scan0003 | |
| Chassis complaints for the New Phantom and 20 HP models. | 13th Jan 1926 | Box 69 \ 4 scan0004 | |
| Complaints about the 'New Phantom' and 20 HP chassis. | 6th Jan 1926 | Box 69 \ 4 scan0005 | |
| List of chassis complaints for the 'New Phantom' model, detailing issues and proposed actions. | 6th Jan 1926 | Box 69 \ 4 scan0006 | |
| Requesting experimental reports on various issues found in the Phantom chassis. | 12th Jan 1926 | Box 69 \ 4 scan0007 | |
| List of vehicle faults and proposed investigations for each issue. | 8th Jan 1926 | Box 69 \ 4 scan0008 | |
| Advising against fitting semi-balloon tyres to a Phantom belonging to Lord Montagu due to steering wobble concerns. | 8th Jan 1926 | Box 69 \ 4 scan0009 | |
| Cracked or broken platform brackets on chassis No. 46-PK. | 19th Jan 1926 | Box 69 \ 4 scan0010 | |
| Requesting modifications and repairs for car 98-NK to address steering wobbles, an old accelerator pedal, and a broken wing stay. | 27th Jan 1926 | Box 69 \ 4 scan0011 | |
| Various engine parts and a complete engine for testing purposes. | 2nd Feb 1925 | Box 69 \ 4 scan0012 | |
| Outlining the value of using aluminium heads and cylinders for the Phantom Engine. | 8th Feb 1926 | Box 69 \ 4 scan0013 | |
| Forwarding particulars of Mr. Filson Young's recent car runs on 10.EX. | 23th Feb 1926 | Box 69 \ 4 scan0014 | |
| Multiple road test trips, detailing routes, speeds, times, and general performance observations. | 1st Feb 1926 | Box 69 \ 4 scan0015 | |
| Sending a blueprint with revised proposals for a lighter Phantom engine with an aluminium cylinder head and block. | 1st Feb 1926 | Box 69 \ 4 scan0016 | |
| List detailing specifications and history for various experimental car models labeled EAC.1 through EAC.7. | 5th Mar 1926 | Box 69 \ 4 scan0017 | |
| Page of notes detailing the specifications of various car models and chassis, including the New Phantom and 20 HP variants. | 6th Mar 1926 | Box 69 \ 4 scan0018 | |
| Design suggestions for the Phantom cylinder head, comparing L-head and valve-in-head engine characteristics. | 6th Mar 1926 | Box 69 \ 4 scan0019 | |
| Engine combustion chamber design, turbulence, and ignition timing. | 6th Mar 1926 | Box 69 \ 4 scan0020 | |
| Engine design, including cam grinding, tappets, and achieving turbulence. | 9th Mar 1926 | Box 69 \ 4 scan0021 | |
| Two faults identified during long-term testing of the New Phantom Chassis, specifically a loose water pump drain pipe and carburetter float chamber cap. | 9th Mar 1926 | Box 69 \ 4 scan0022 | |
| The New Phantom, attaching another document for review and action. | 18th Mar 1926 | Box 69 \ 4 scan0023 | |
| Two defects on the New Phantom, concerning engine stalling and the inspection lamp circuit. | 17th Mar 1926 | Box 69 \ 4 scan0024 | |
| Response to customer complaints regarding the New Phantom, covering the float chamber cover, engine, and electrical systems. | 19th Mar 1926 | Box 69 \ 4 scan0025 | |
| Technical note on the correct wiring of the dimmer switch and fuses for the headlamps and inspection lamp. | 23th Mar 1926 | Box 69 \ 4 scan0026 | |
| Request for an experimental 'New Phantom' or converted 'Silver Ghost' chassis for the Instruction Class. | 23th Mar 1926 | Box 69 \ 4 scan0027 | |
| Engine stalling fault on the New Phantom, related to the governor and clutch, and a separate point about the inspection lamp circuit. | 23th Mar 1926 | Box 69 \ 4 scan0028 | |
| The unavailability of a New Phantom experimental chassis for a demonstration class. | 26th Mar 1926 | Box 69 \ 4 scan0029 | |
| From 'Hs.' to 'CJ.' regarding the schedule and plans for testing experimental cars in France. | 26th Mar 1926 | Box 69 \ 4 scan0030 | |
| Mr. Day's visit to Le Canadel and a proposed test run across France. | 30th Mar 1926 | Box 69 \ 4 scan0031 | |
| Design alterations and testing possibilities for the Lighter Phantom Engine, focusing on compression ratios and sparking plug placement. | 1st Apr 1926 | Box 69 \ 4 scan0032 | |
| Outlining nine suggestions for lightening the Phantom engine. | 1st Apr 1926 | Box 69 \ 4 scan0033 | |
| Urgent actions for reducing the weight of the Phantom vehicle. | 2nd Apr 1926 | Box 69 \ 4 scan0034 | |
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