| Description | Date | Identifier | |
| Confirming satisfactory testing of new Phantom cylinder gaskets and suggesting further orders. | 8th Jul 1925 | Box 65 \ 4 scan0346 | |
| Telephone conversation regarding modifications and tests on engine components like liners, valves, and a Phantom cylinder block. | 1st Aug 1926 | Box 65 \ 4 scan0347 | |
| Proposed modifications to the Phantom engine's induction pipes, manifold, and other components to improve performance. | 30th Aug 1926 | Box 65 \ 4 scan0348 | |
| Production status of the Lighter Phantom engine with aluminium cylinders. | 31th Aug 1926 | Box 65 \ 4 scan0349 | |
| Technical memo detailing an experiment to measure Phantom engine cylinder wall temperatures using nickel-iron thermocouples. | 1st Oct 1926 | Box 65 \ 4 scan0350 | |
| Test report detailing temperature readings taken from a cylinder wall using a thermocouple setup. | 1st Oct 1926 | Box 65 \ 4 scan0351 | |
| Engine temperature and compression ratio tests on the Phantom and Falcon X engines. | 18th Oct 1926 | Box 65 \ 4 scan0352 | |
| Cylinder and liner temperature tests on the lighter Phantom engine, prompted by issues on the Falcon X engine. | 18th Oct 1926 | Box 65 \ 4 scan0353 | |
| Technical note detailing the placement and testing of couples on the pressure side of a cylinder bore. | 18th Oct 1926 | Box 65 \ 4 scan0354 | |
| Cylinder temperature tests, comparing liner and cylinder wall temperatures at different speeds and B.M.E.P. | 18th Oct 1926 | Box 65 \ 4 scan0355 | |
| Engine tests investigating pre-ignition and the effect of reduced oil flow on component temperatures. | 18th Oct 1926 | Box 65 \ 4 scan0356 | |
| Test report summary on cylinder liner temperatures, the effects of oil cooling, and pre-ignition on an engine. | 12th Oct 1926 | Box 65 \ 4 scan0357 | |
| Blueprint with graphs showing liner temperatures for a Lighter Phantom Engine under various conditions. | 12th Oct 1926 | Box 65 \ 4 scan0358 | |
| Confirming a suggestion to use a single lip on the Lighter Phantom cylinder head to improve turbulence. | 28th Oct 1926 | Box 65 \ 4 scan0359 | |
| Experimental shrunk steel sleeve on a 'Phantom' cylinder, stressing the need for official testing before use on customer cars. | 17th Jan 1927 | Box 65 \ 4 scan0360 | |
| Improvement to Phantom Cylinders to reduce engine knock. | 17th Jan 1927 | Box 65 \ 4 scan0361 | |
| The performance of Phantom cylinders with an extended bore, focusing on piston knock and bedding procedures. | 12th Apr 1927 | Box 65 \ 4 scan0362 | |
| Cable about the cause of cylinder knocking in Phantom cylinders. | 18th May 1927 | Box 65 \ 4 scan0363 | |
| Requesting cylinder block drawings for a revised Phantom dry liner aluminium engine and discussing variable compression ratios. | 1st Jun 1927 | Box 65 \ 4 scan0364 | |
| Improvements to Phantom cylinder blocks to avoid bore distortion and consequent piston knocks. | 25th Jun 1927 | Box 65 \ 4 scan0365 | |
| Outlining the policy for modifications to the Phantom model, focusing on a lightened version with a turbulent head. | 20th Jul 1927 | Box 65 \ 4 scan0366 | |
| Blueprints and modifications for cylinder head and piston designs on Blue Sports Chassis. | 16th Aug 1927 | Box 65 \ 4 scan0367 | |
| Modifications to the Phantom cylinder block to reduce distortion and piston knock. | 26th Aug 1927 | Box 65 \ 4 scan0368 | |
| Drawings for the Phantom Sports Engine crankcase, cylinder blocks, and valve gear. | 31th Aug 1927 | Box 65 \ 4 scan0369 | |
| Successful 1000-mile test of honed cylinders on a Phantom car and their proposed use in standard production. | 22th Sep 1927 | Box 65 \ 4 scan0370 | |
| Modifications to the Phantom cylinder block and valve gear for the sports chassis. | 24th Sep 1927 | Box 65 \ 4 scan0371 | |
| The scheme for doweling cylinder blocks on a sports chassis engine. | 24th Oct 1927 | Box 65 \ 4 scan0372 | |
| Potential solutions for vehicle acceleration and engine improvements, considering superchargers, gearboxes, and cylinder counts. | 31th Oct 1927 | Box 65 \ 4 scan0373 | |
| Request to produce an aluminium cylinder head for the Phantom and to prepare drawings for cast iron cylinder blocks. | 22th Nov 1927 | Box 65 \ 4 scan0374 | |
| Over-oiling issues in honed cylinders for the Phantom engine, detailing the failure of square section rings and their replacement. | 22th Sep 1927 | Box 65 \ 4 scan0375 | |
| Letter discussing issues with cold knocking in Phantom engines and potential solutions. | 6th Dec 1927 | Box 65 \ 4 scan0376 | |
| Page 2 of a letter regarding claims of engine improvements by directing water at valves and exhausts. | 6th Dec 1927 | Box 65 \ 4 scan0377 | |
| Proposal for modifying the cooling system by supplying water directly to the cylinder head. | 6th Dec 1927 | Box 65 \ 4 scan0378 | |
| Clarifying a misunderstanding regarding a recommendation for shrinking steel rings onto Phantom Cylinders. | 13th Dec 1927 | Box 65 \ 4 scan0379 | |
| Chasing up instructions for a pair of modified Phantom Cylinder Blocks. | 12th Dec 1927 | Box 65 \ 4 scan0380 | |
| Reuse of reinforced cylinder blocks from customer cars to address knocking complaints. | 14th Dec 1927 | Box 65 \ 4 scan0381 | |
| Requirement for altered cylinder blocks to be tested by the Experimental Department before being stocked or supplied to customers. | 15th Dec 1927 | Box 65 \ 4 scan0382 | |
| Instruction to permanently modify the pattern for a Sports Phantom cylinder head to alter the compression ratio. | 29th Dec 1927 | Box 65 \ 4 scan0383 | |
| With a sketch discussing design modifications and compression ratios for a 40/50 HP chassis aluminium cylinder head. | 22th Mar 1928 | Box 65 \ 4 scan0384 | |
| Design of exhaust and inlet valve guides for the Phantom Aluminium Head. | 23th Mar 1928 | Box 65 \ 4 scan0385 | |
| Suggestion to improve iron castings by adding nickel and chromium for use in car cylinders and flywheels. | 23th May 1928 | Box 65 \ 4 scan0386 | |
| Laboratory memorandum on the effects of adding Nickel and Chromium to iron castings for components like cylinder blocks. | 25th May 1923 | Box 65 \ 4 scan0387 | |
| Request to produce a cast iron version of a turbulent cylinder head for testing, to resolve issues with the aluminium version. | 18th Jul 1928 | Box 65 \ 4 scan0388 | |
| Need to increase the size of the oil supply pipe for extra cylinder lubrication on the 40/50 HP chassis. | 22th Jan 1930 | Box 65 \ 4 scan0389 | |
| The optimal pipe size for extra cylinder lubrication on a 40/50 HP chassis. | 22th Jan 1930 | Box 65 \ 4 scan0390 | |
| Delays in completing a modified frame design for the New Phantom model. | 19th Oct 1925 | Box 65a \ 1 scan0001 | |
| Engineering memo explaining the reasons for urgent chassis modifications to favor a shorter wheelbase. | 24th Oct 1925 | Box 65a \ 1 scan0002 | |
| Chassis modifications, gearbox suspension delays, and radiator design improvements. | 29th Oct 1925 | Box 65a \ 1 scan0003 | |
| Efforts to reduce the weight of various vehicle components, including the engine and chassis. | 29th Oct 1925 | Box 65a \ 1 scan0004 | |
| Progress of various design and experimental work projects. | 1st Nov 1925 | Box 65a \ 1 scan0005 | |
| Confirming the engine position in the frame, referencing associated full-sized layout drawings. | 11th Apr 1925 | Box 65a \ 1 scan0006 | |
| Clarifying the requirement for a short wheelbase chassis with 'D' type steering for West Wittering. | 5th Nov 1925 | Box 65a \ 1 scan0007 | |
| Concerning the final appearance of a new open body car design and the need for viewing before sales approval. | 6th Nov 1925 | Box 65a \ 1 scan0008 | |
| Design and aesthetic considerations for a new C.S.C. chassis, particularly the bonnet and scuttle. | 1st Nov 1925 | Box 65a \ 1 scan0009 | |
| Summarising a C.S.C. meeting regarding proposed modifications to a car chassis and body. | 5th Nov 1925 | Box 65a \ 1 scan0010 | |
| Design adjustments and specifications for chassis EAC.7 and EAC.8. | 18th Nov 1925 | Box 65a \ 1 scan0011 | |
| The ordering of frame side members, referencing outline drawing N.sch.2090. | 19th Nov 1925 | Box 65a \ 1 scan0012 | |
| Confidential report on a new chassis, detailing its features, improvements, and comparison to other models. | 24th Nov 1925 | Box 65a \ 1 scan0013 | |
| Modifications to carry a spare wheel at the rear and adjust the rear suspension. | 25th Nov 1925 | Box 65a \ 1 scan0014 | |
| Modifications for the front end of an E.A.C.I. chassis. | 28th Nov 1925 | Box 65a \ 1 scan0015 | |
| Lightening the Phantom engine, comparing its weight to the Silver Ghost, and material changes. | 1st Dec 1925 | Box 65a \ 1 scan0016 | |
| Abandoning the subframe on cantilever sprung cars in favour of the EAC.7 frame with semi-elliptic springs. | 19th Jan 1926 | Box 65a \ 1 scan0017 | |
| Typed memo from D.A. to H.s. concerning a visit to Derby, referencing a telegram received. | 6th Feb 1926 | Box 65a \ 1 scan0018 | |
| Confirming the despatch of information required to construct the first EAC.8. chassis. | 10th Feb 1926 | Box 65a \ 1 scan0019 | |
| Coachwork modifications for chassis X.7390, X.7770, and X.7830, detailing work progress and coordination with Barkers. | 10th Feb 1926 | Box 65a \ 1 scan0020 | |
| Outlining three outstanding design points requiring settlement for project EAC.VIII. | 12th Feb 1926 | Box 65a \ 1 scan0021 | |
| Instructions for modifications to the gearbox and starter on the engine. | 1st Mar 1926 | Box 65a \ 1 scan0022 | |
| Progress on a detachable dash connection, a lighter clutch, propeller shaft joints, and gearbox modifications. | 2nd Mar 1926 | Box 65a \ 1 scan0023 | |
| Visit to Derby, work on shock dampers, proposals for a 40/50 back axle, and a suggested run on an EAC.7 car. | 2nd Mar 1926 | Box 65a \ 1 scan0024 | |
| List detailing specifications for experimental cars, designated EAC.1 to EAC.7. | 5th Mar 1926 | Box 65a \ 1 scan0025 | |
| Continued list of car model specifications and notes, page 2. | 16th Mar 1925 | Box 65a \ 1 scan0026 | |
| Visit to Le Canadel, the transport of a 20 HP vehicle, and the delayed readiness of vehicle EAC.8. | 16th Mar 1925 | Box 65a \ 1 scan0027 | |
| From DA to HS regarding a visit to Le Canadel. | 19th Mar 1926 | Box 65a \ 1 scan0028 | |
| Mr. Day's visit to Le Canadel and a proposed car test run across France. | 30th Mar 1926 | Box 65a \ 1 scan0029 | |
| Updating on the progress of the EAC. 8 chassis, specifically the body mounting and receipt of drawings for hydraulic dampers. | 4th Apr 1926 | Box 65a \ 1 scan0030 | |
| Post Office telegram regarding arrangements to test body-works. | 14th Apr 1926 | Box 65a \ 1 scan0031 | |
| List of urgent modifications for a vehicle before a visit to France. | 21th Apr 1926 | Box 65a \ 1 scan0032 | |
| Information required for chassis components like a pendulum lever guard, brakes, frame, and springs. | 21th Apr 1926 | Box 65a \ 1 scan0033 | |
| Design and manufacturing details for various vehicle components. | 21th Apr 1926 | Box 65a \ 1 scan0034 | |
| Design and component specifications, including shock absorbers, instrument board, horn, wiring, and spare wheel carriers. | 21th Apr 1926 | Box 65a \ 1 scan0035 | |
| Schematics for the EAC.7 chassis rear end, detailing its components and changes from the EAC.1 model. | 26th Apr 1926 | Box 65a \ 1 scan0036 | |
| Listing ten new or modified parts on a car for an upcoming inspection. | 30th Apr 1926 | Box 65a \ 1 scan0037 | |
| Ground clearance for a proposed new chassis. | 13th May 1926 | Box 65a \ 1 scan0038 | |
| Secret memo requesting six black and white prints of the experimental chassis layout E.A.C. IX. | 13th May 1926 | Box 65a \ 1 scan0039 | |
| Potential modifications to the Phantom chassis, including steering, ignition, and pistons. | 18th May 1926 | Box 65a \ 1 scan0040 | |
| Design and advantages of three different types of pistons for experimental testing. | 18th May 1926 | Box 65a \ 1 scan0041 | |
| Modifications for the Lighter Phantom Engine, including increasing cylinder block height and options for pistons and connecting rods. | 7th Jun 1926 | Box 65a \ 1 scan0042 | |
| Design and quality issues found on a Barker open body for Phantom Lower Cars. | 16th Jun 1926 | Box 65a \ 1 scan0043 | |
| Page two of a document discussing a campaign to lighten the chassis and lower the car. | 26th Jun 1926 | Box 65a \ 1 scan0044 | |
| Typed memo detailing feedback and proposed modifications for experimental car models. | 26th Jun 1926 | Box 65a \ 1 scan0045 | |
| Points raised during a chassis visit, suggesting modifications to various components. | 28th Jun 1926 | Box 65a \ 1 scan0046 | |
| Page discussing bonnet clips, luggage carriers, and a list of proposed changes for the 12-EX model before a 10,000 miles test. | 21th Jun 1926 | Box 65a \ 1 scan0047 | |
| Design of the American Chassis EAC-9 and the protocol for providing feedback. | 2nd Jul 1926 | Box 65a \ 1 scan0048 | |
| List of 15 improvements to be tested on an experimental car in France. | 2nd Jul 1926 | Box 65a \ 1 scan0049 | |
| The development process and feedback for the American Chassis EAC. IX. | 5th Jul 1926 | Box 65a \ 1 scan0050 | |
| Modifications to the 12-EX car before a 10,000-mile trial in France. | 13th Jul 1926 | Box 65a \ 1 scan0051 | |
| Required modifications and progress for a new chassis design, listing components ready and those awaited. | 20th Aug 1926 | Box 65a \ 1 scan0052 | |
| Continuation page discussing difficulties in getting a chassis on the road, specifically regarding the sequence starter. | 30th Aug 1926 | Box 65a \ 1 scan0053 | |
| Expected timeline for a Phantom engine with a new aluminium head and an EAC-V11 chassis. | 30th Aug 1926 | Box 65a \ 1 scan0054 | |
| Secret memo about the urgency of getting chassis EAC.7 with a lightened Phantom engine on the road. | 31th Aug 1926 | Box 65a \ 1 scan0055 | |
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