| Description | Date | Identifier | |
| Inspection notes on various parts for the 20 HP chassis, with feedback from Mr. Royce. | 1st May 1920 | West Wittering \ D \ May1920 Scan44 | |
| Mr. Royce's considerations and proposed modifications for various chassis components. | 18th May 1920 | West Wittering \ D \ May1920 Scan45 | |
| Experimental routine tests carried out on batteries. | 18th May 1920 | West Wittering \ D \ May1920 Scan46 | |
| Results and methodology of continuous and intermittent high-rate discharge tests on batteries. | 18th May 1920 | West Wittering \ D \ May1920 Scan47 | |
| Report page showing open circuit voltage test results for various batteries. | 17th May 1920 | West Wittering \ D \ May1920 Scan48 | |
| Analysis of battery performance under continuous and intermittent high-rate discharge conditions. | 18th May 1920 | West Wittering \ D \ May1920 Scan49 | |
| Page detailing results and outlining a program of special tests for batteries, including vibration, leakage and over-charging. | 18th May 1920 | West Wittering \ D \ May1920 Scan50 | |
| The testing and performance of sample batteries from Fuller and Lucas. | 18th May 1920 | West Wittering \ D \ May1920 Scan51 | |
| The testing and evaluation of various types of storage batteries. | 18th May 1920 | West Wittering \ D \ May1920 Scan52 | |
| Report page continuing the evaluation of Premier, Willard, and Tudor batteries. | 18th May 1920 | West Wittering \ D \ May1920 Scan53 | |
| Battery testing, detailing an accident with two cells and plans for testing new Tudor and Chloride batteries. | 18th May 1920 | West Wittering \ D \ May1920 Scan54 | |
| Testing a PHR 7 battery from the Chloride Company, comparing it to standard models. | 18th May 1920 | West Wittering \ D \ May1920 Scan55 | |
| Table of performance data for experimental chassis lighting and starting batteries. | 10th May 1920 | West Wittering \ D \ May1920 Scan56 | |
| Table of performance data for experimental chassis lighting and starting batteries. | 8th Feb 1913 | West Wittering \ D \ May1920 Scan57 | |
| Performance table of experimental chassis lighting and starting batteries. | 1st Aug 1920 | West Wittering \ D \ May1920 Scan58 | |
| Graph showing high rate discharge curves for various batteries used for lighting and starting. | 1st Aug 1920 | West Wittering \ D \ May1920 Scan59 | |
| Cover sheet with a Print Room stamp. | 10th May 1920 | West Wittering \ D \ May1920 Scan60 | |
| Graph showing intermittent high rate discharge curves for various car lighting and starting batteries. | 8th Oct 1914 | West Wittering \ D \ May1920 Scan61 | |
| Blank folder cover stamped by the Print Room. | 1st Aug 1920 | West Wittering \ D \ May1920 Scan62 | |
| Graph showing high-rate discharge performance curves for various batteries used for chassis lighting and starting. | 3rd May 1920 | West Wittering \ D \ May1920 Scan63 | |
| Graph of intermittent high-rate discharge curves for various car lighting and starting batteries. | 3rd May 1920 | West Wittering \ D \ May1920 Scan64 | |
| Series of ten graphs comparing the performance of various electrical components under test conditions. | 12th Jun 1919 | West Wittering \ D \ May1920 Scan65 | |
| Four battery discharge curve graphs from tests conducted in 1920. | 26th Mar 1920 | West Wittering \ D \ May1920 Scan67 | |
| Effect of brush position variation on the output of the Smith Dynamo. | 19th Feb 1920 | West Wittering \ D \ May1920 Scan68 | |
| Reducing the high output of the dynamo on chassis 4 EX. | 19th May 1920 | West Wittering \ D \ May1920 Scan69 | |
| Graph showing the effect of brush position variation on the output of a Smith Type A Dynamo. | 18th May 1921 | West Wittering \ D \ May1920 Scan70 | |
| Blank document with a purple ink stamp from the Print Room. | 21th May 1940 | West Wittering \ D \ May1920 Scan71 | |
| Technical report on special ignition coils, presenting gap-speed curves and comparing performance. | 22th May 1920 | West Wittering \ D \ May1920 Scan72 | |
| Graph showing maximum gap vs. speed curves for coil models E12 and E16. | 17th May 1920 | West Wittering \ D \ May1920 Scan73 | |
| Reverse of a document showing a 'Print Room' stamp. | 21th May 1920 | West Wittering \ D \ May1920 Scan74 | |
| Testing and developing a new Lucas C.575 dynamo compared to the standard E.575 model. | 29th May 1920 | West Wittering \ D \ May1920 Scan75 | |
| Continued discussion on the performance of E.575 and C.575 dynamos, detailing factors that affect out-put curves. | 29th May 1920 | West Wittering \ D \ May1920 Scan76 | |
| Continued discussion on dynamo performance, hot out-put curves, and battery conditions. | 29th May 1920 | West Wittering \ D \ May1920 Scan77 | |
| Dynamo performance, comparing the C.575 machine and suggesting optimal output settings. | 29th May 1920 | West Wittering \ D \ May1920 Scan78 | |
| Continued report comparing the performance and faults of Smith and Lucas dynamos. | 29th May 1920 | West Wittering \ D \ May1920 Scan79 | |
| Comparison of the C.575a Lucas dynamo against the E.575 and Smith dynamos for standardization. | 29th May 1920 | West Wittering \ D \ May1920 Scan80 | |
| Graph comparing the output curves of Lucas E.575 and C.575 dynamos under cold and hot conditions. | 14th Jan 1929 | West Wittering \ D \ May1920 Scan81 | |
| Reverse of a document showing a purple ink stamp from the Print Room in Derby. | 29th May 1920 | West Wittering \ D \ May1920 Scan82 | |
| Parts to be used for the next 10,000 miles test. | 13th Nov 1919 | West Wittering \ D \ November1919 Scan0 | |
| Design choices and standardisation for a magneto base on the 40/50 HP chassis. | 12th Nov 1919 | West Wittering \ D \ November1919 Scan1 | |
| Simplification of a clutch oil retaining ring for a 40/50 HP chassis. | 4th Nov 1919 | West Wittering \ D \ November1919 Scan2 | |
| Pinning of rings and balancing of a ram piston for a 40/50 HP chassis. | 7th Nov 1919 | West Wittering \ D \ November1919 Scan3 | |
| Requesting an alteration to the radiator suspension dimensions for the 40/50 HP model following bumping tests. | 14th Nov 1919 | West Wittering \ D \ November1919 Scan4 | |
| Telegram confirmation regarding a test on piston pin locking screws. | 14th Nov 1919 | West Wittering \ D \ November1919 Scan5 | |
| Appropriate dimensions and capacity for a battery to be fitted in the frame. | 17th Nov 1919 | West Wittering \ D \ November1919 Scan6 | |
| Specifications and ordering of batteries, including dimensions, capacity, and performance requirements. | 1st Nov 1919 | West Wittering \ D \ November1919 Scan7 | |
| Issues with battery dimensions, suggesting a shorter battery with moderate dimensions be sourced from Exide or Tudor. | 1st Nov 1919 | West Wittering \ D \ November1919 Scan8 | |
| Battery cell separation, ordering new batteries, and specifying their performance requirements. | 1st Nov 1919 | West Wittering \ D \ November1919 Scan9 | |
| Design considerations for the 3/19 gear box and chassis components for the 40/50 HP American Chassis. | 17th Nov 1919 | West Wittering \ D \ November1919 Scan10 | |
| Design changes for a gearbox, including pinion taper, helical gears, hub lightening, and adapting the mechanism for right-hand steering. | 17th Nov 1919 | West Wittering \ D \ November1919 Scan11 | |
| Changes to the American model chassis, involving a three-speed gearbox and central change levers. | 19th Nov 1919 | West Wittering \ D \ November1919 Scan12 | |
| Instability of a battery box in the 40/50 HP chassis and Mr. Royce's proposed modifications. | 20th Nov 1919 | West Wittering \ D \ November1919 Scan13 | |
| Design alterations for a battery box, including a sketch. | 1st Nov 1919 | West Wittering \ D \ November1919 Scan14 | |
| Casing thickness for a 3/19 gearbox and specifying a new dimension. | 19th Nov 1919 | West Wittering \ D \ November1919 Scan15 | |
| Design dissatisfaction and proposed modifications for the speedometer drive and its reduction gear. | 19th Nov 1919 | West Wittering \ D \ November1919 Scan16 | |
| Diametral pitch for gear meshing and a lubrication method for a pinion shaft bush. | 1st Nov 1919 | West Wittering \ D \ November1919 Scan17 | |
| The maintenance of chassis electrical accumulators, focusing on acid gravity and corrosion prevention. | 27th Nov 1919 | West Wittering \ D \ November1919 Scan18 | |
| Telex message from West Wittering to Derby regarding a test on piston pin locking screws. | 30th Jan 1933 | West Wittering \ D \ November1919 Scan19 | |
| Modifications for the 40/50 HP chassis switchbox before standardization. | 24th Nov 1919 | West Wittering \ D \ November1919 Scan20 | |
| Design modifications and standardization requests for a switchbox. | 1st Nov 1919 | West Wittering \ D \ November1919 Scan21 | |
| Design alterations and standardisation for the switchbox on a 40/50 HP chassis. | 26th Nov 1919 | West Wittering \ D \ November1919 Scan22 | |
| Postscript detailing the method for joining conductors and assembling the switch box in a vehicle. | 1st Nov 1919 | West Wittering \ D \ November1919 Scan23 | |
| Instruction regarding the material and treatment of the instrument board for the 40/50 HP chassis. | 26th Nov 1919 | West Wittering \ D \ November1919 Scan24 | |
| Confirmation of a telegram from Royce regarding piston ring modifications and a request for a car. | 18th Nov 1919 | West Wittering \ D \ November1919 Scan25 | |
| Telegram from Royce regarding the comparative testing of split pistons versus plunger pistons and the delivery of chassis 1 EX. | 22th Nov 1919 | West Wittering \ D \ November1919 Scan26 | |
| Describing three experimental silent ram pistons for a 40/50 HP chassis. | 27th Nov 1919 | West Wittering \ D \ November1919 Scan27 | |
| Page 2 of a memo from E. to D.A. regarding modifications to a C piston ram and oil collecting groove. | 27th Nov 1919 | West Wittering \ D \ November1919 Scan28 | |
| Modifications to car 1.EX, addressing over-oiling, clutch, wiring, and thermometer issues. | 1st Dec 1919 | West Wittering \ D \ November1919 Scan29 | |
| Drawing for the starter motor support on the American 40/50 HP chassis. | 28th Nov 1919 | West Wittering \ D \ November1919 Scan30 | |
| Requesting an investigation into materials for accumulator box fittings to resist sulphuric acid. | 1st Nov 1919 | West Wittering \ D \ November1919 Scan31 | |
| Protective coatings and materials for a battery box stirrup to resist acid. | 29th Nov 1919 | West Wittering \ D \ November1919 Scan32 | |
| The decision to reintroduce keying for tappets to maintain valve quietness and clearance. | 6th Dec 1919 | West Wittering \ D \ November1919 Scan33 | |
| Drawing for a 20 HP crankcase and a delay in work due to the American chassis. | 4th Oct 1919 | West Wittering \ D \ October1919 Scan0 | |
| Crankcase design changes and a work stoppage on the 30 HP engine. | 13th Oct 1918 | West Wittering \ D \ October1919 Scan1 | |
| The armouring of low tension conductors for the 40/50 HP chassis. | 6th Oct 1919 | West Wittering \ D \ October1919 Scan2 | |
| Material composition and pressure for starter motor brushes. | 1st Oct 1919 | West Wittering \ D \ October1919 Scan3 | |
| Performance of petrol filters and future design, noting potential issues with benzol and water contamination. | 1st Oct 1919 | West Wittering \ D \ October1919 Scan4 | |
| With sketches detailing Mr. Royce's design approval for a 40/50 HP magneto strap. | 9th Oct 1919 | West Wittering \ D \ October1919 Scan5 | |
| Experiments to reduce piston knock using an oil-fed cylinder, as suggested by Mr. Royce. | 9th Oct 1919 | West Wittering \ D \ October1919 Scan6 | |
| Experiments to resolve piston knocking using an oil plunger scheme. | 1st Oct 1919 | West Wittering \ D \ October1919 Scan7 | |
| Alterations to the high-tension distributor rotor to economise on platinum. | 1st Oct 1919 | West Wittering \ D \ October1919 Scan8 | |
| Requesting an inquiry into the hard metal used by Americans for ignition contacts. | 16th Oct 1919 | West Wittering \ D \ October1919 Scan9 | |
| Directive from Mr. Royce to change the material of the condenser spring from steel to bronze due to rust. | 18th Oct 1919 | West Wittering \ D \ October1919 Scan10 | |
| Proposed piston design with an oil ram to prevent knocking in the 40/50 HP chassis. | 16th Oct 1919 | West Wittering \ D \ October1919 Scan11 | |
| Suggestions from Mr. Royce and Mr. Hives on using a back pressure valve and a larger ram to prevent knocks and piston ring wear. | 1st Oct 1919 | West Wittering \ D \ October1919 Scan12 | |
| Theoretical and practical development of silent pistons. | 1st Oct 1919 | West Wittering \ D \ October1919 Scan13 | |
| Design, functionality, and patenting of split pistons. | 17th Oct 1919 | West Wittering \ D \ October1919 Scan14 | |
| Notice advising users on radiator management for economical engine operation during autumn. | 29th Oct 1919 | West Wittering \ D \ October1919 Scan15 | |
| Telegram discussing an engine misfire, cured by changing spark plugs, with further suggestions for wiring. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan16 | |
| Telegram from Royce regarding the results of bunching wires together. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan17 | |
| Reverse side of a document with handwritten pencil annotations and a faint stamp. | 27th Oct 1919 | West Wittering \ D \ October1919 Scan18 | |
| Telegram received by telephone concerning engine misfires and a potential solution involving changing ignition plugs. | 27th Oct 1919 | West Wittering \ D \ October1919 Scan19 | |
| Telegram message received by telephone with instructions for ignition system components. | 1st Oct 1921 | West Wittering \ D \ October1919 Scan20 | |
| Telegram received by telephone detailing modifications to an electrical system. | 25th Jan 1912 | West Wittering \ D \ October1919 Scan21 | |
| Telegram message regarding a fault being cured by changing plugs. | 25th Feb 1916 | West Wittering \ D \ October1919 Scan22 | |
| Requesting alterations to blueprint LeC.1104 for a 20 HP bonnet and radiator. | 28th Oct 1919 | West Wittering \ D \ October1919 Scan23 | |
| Telegram discussing issues with battery ignition, spark power, and discharge at the plug points. | 29th Oct 1919 | West Wittering \ D \ October1919 Scan24 | |
| Telegram from Royce detailing a temporary fix for an engine distribution issue by repositioning the coil. | 29th Oct 1919 | West Wittering \ D \ October1919 Scan25 | |
| Reverse side of a folded document with handwritten pencil annotations and a faint stamp. | 1st Oct 1919 | West Wittering \ D \ October1919 Scan26 | |
| Design of a 40/50 HP aluminium piston with a 2' diameter anti-knocking ram. | 1st Oct 1919 | West Wittering \ D \ October1919 Scan27 | |
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