| Description | Date | Identifier | |
| Instructions for standardizing the ram pattern of a piston with an eccentric core. | 30th Oct 1919 | West Wittering \ D \ October1919 Scan28 | |
| The road trials of battery ignition systems, investigating the causes of misfiring. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan29 | |
| The principles and components of a high-tension ignition circuit. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan30 | |
| Ignition coil polarity and distributor adjustments for improved engine firing. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan31 | |
| Experiments to improve ignition timing by altering spark gaps and advancing the distributor rotor. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan32 | |
| Ignition system misfires, discussing distributor wiring, coil placement, and spark plug types. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan33 | |
| High tension circuit misfiring, attributing the issue to coil insulation stress and proposing tests with new experimental coils. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan34 | |
| Road testing a Remy 6-cylinder coil and investigating mis-firing issues compared to the standard coil. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan35 | |
| Coil failures during testing and suggesting improvements to insulation. | 24th Oct 1919 | West Wittering \ D \ October1919 Scan36 | |
| Telegram from Royce to Claude Johnson regarding chassis and engine modifications, confirming fears about torque variation were unfounded. | 30th Oct 1919 | West Wittering \ D \ October1919 Scan37 | |
| From Royce to Barrington Wormald regarding battery ignition experiments. | 18th Nov 1919 | West Wittering \ D \ October1919 Scan38 | |
| Proposed modifications to the distribution box and its cut-out. | 14th Jun 1920 | West Wittering \ E \ August1920 Scan0 | |
| The completion of steering column parts and the plan to fit them to a car. | 1st Aug 1920 | West Wittering \ E \ August1920 Scan1 | |
| The unsatisfactory results of testing tungsten contact points, concluding that only platinum is suitable for their ignition system. | 12th Aug 1920 | West Wittering \ E \ August1920 Scan2 | |
| Electrical appendix to a handbook, with points on battery maintenance and useful tools. | 6th Aug 1920 | West Wittering \ E \ August1920 Scan3 | |
| Specifications for an Aero Type Dynamo with a vibrator regulator. | 17th Aug 1920 | West Wittering \ E \ August1920 Scan4 | |
| Continued description of a voltage control regulator, detailing its components, materials, and electrical operation. | 17th Aug 1920 | West Wittering \ E \ August1920 Scan5 | |
| The characteristics of carbon contacts and open circuit results in a dynamo and regulator system. | 17th Aug 1920 | West Wittering \ E \ August1920 Scan6 | |
| Continued report discussing field currents and vibrator control systems, comparing carbon contacts to metal contacts in dynamos. | 17th Aug 1920 | West Wittering \ E \ August1920 Scan7 | |
| Circuit diagram detailing the connections of an Aero Dynamo and a vibrator regulator. | 18th Aug 1930 | West Wittering \ E \ August1920 Scan8 | |
| The testing and evaluation of a Multiple Storage Type C.A.618 battery, detailing its condition, design flaws, and performance results. | 20th Aug 1920 | West Wittering \ E \ August1920 Scan10 | |
| Battery charging and discharging performance tests. | 20th Aug 1920 | West Wittering \ E \ August1920 Scan11 | |
| Test report on a 12-volt battery's discharge performance, construction, and comparison to standard models. | 20th Aug 1920 | West Wittering \ E \ August1920 Scan12 | |
| Continued memo regarding battery testing, inspection, and forwarding results to Messrs. Hobson. | 20th Aug 1920 | West Wittering \ E \ August1920 Scan13 | |
| Protection of the dynamo-battery system using fuses, comparing different fuse positions. | 25th Aug 1920 | West Wittering \ E \ August1920 Scan15 | |
| Disadvantages of a circuit diagram regarding fuses and seeking advice on a better arrangement. | 25th Aug 1920 | West Wittering \ E \ August1920 Scan16 | |
| Two wiring diagrams for a vehicle's dynamo charging system, labelled Fig. 1 and Fig. 2. | 25th Aug 1920 | West Wittering \ E \ August1920 Scan17 | |
| Risk of overheating in Lucas and Smith dynamos and the fuse systems used to prevent it. | 25th Aug 1920 | West Wittering \ E \ August1920 Scan18 | |
| The potential for interchanging main and field fuses, proposing non-interchangeable holders and further testing. | 25th Aug 1920 | West Wittering \ E \ August1920 Scan19 | |
| Correspondence regarding faulty dynamo suspension clips and the despatch of a replacement sample. | 27th Aug 1920 | West Wittering \ E \ August1920 Scan20 | |
| Unsuitability of the Scintilla Magneto Type AM6 and recommending its return to the manufacturer. | 31th Aug 1920 | West Wittering \ E \ August1920 Scan21 | |
| Pros and cons of earthed versus non-earthed electrical wiring schemes for a car. | 6th Aug 1920 | West Wittering \ E \ August1920 Scan22 | |
| Desirability of a disconnectable earth connection for testing purposes. | 8th Mar 1920 | West Wittering \ E \ August1920 Scan23 | |
| Buckled positive plates on a 'Buick' accumulator. | 6th Aug 1920 | West Wittering \ E \ August1920 Scan24 | |
| The failure of Exide accumulators, discussing plate buckling and suggesting improvements for sealing. | 6th Aug 1920 | West Wittering \ E \ August1920 Scan25 | |
| Directive from Mr. Royce on modifying the wooden models for 40/50 HP steel engine feet brackets. | 6th Aug 1920 | West Wittering \ E \ August1920 Scan26 | |
| 'Buzzard' starting motor gear and bracket, enclosing drawing Lec.1268. | 1st Aug 1920 | West Wittering \ E \ August1920 Scan27 | |
| Scheme for a petrol level gauge and reserve supply device. | 6th Aug 1920 | West Wittering \ E \ August1920 Scan28 | |
| Sending drawing No. LeC.1265 for the 'Vulture' connecting rod and requesting an advance model for Mr. Royce's criticism. | 1st Aug 1920 | West Wittering \ E \ August1920 Scan29 | |
| Sending drawings for the 'Buzzard' crankcase. | 27th Aug 1920 | West Wittering \ E \ August1920 Scan30 | |
| Sending drawing No. Lec.1228, showing a view of a cylinder facing on the 'Buzzard' Crankcase. | 9th Aug 1920 | West Wittering \ E \ August1920 Scan31 | |
| Drawing No. LeC.1271 for the 'Buzzard' engine's Crankcase Rear Supporting Member. | 1st Aug 1920 | West Wittering \ E \ August1920 Scan32 | |
| And comparing designs for a petrol gauge, including a 'bull eye' and a bevel-geared magnetic type. | 10th Aug 1920 | West Wittering \ E \ August1920 Scan33 | |
| Protecting glass from breakage and comparing the hardness of English and French plate-glass. | 10th Aug 1920 | West Wittering \ E \ August1920 Scan34 | |
| Requesting the source and specification of Castor Oil lubricant. | 6th Aug 1920 | West Wittering \ E \ August1920 Scan35 | |
| Return of a Smith dynamo after inspection by Mr. Royce. | 11th Aug 1920 | West Wittering \ E \ August1920 Scan36 | |
| Instruction to omit the taper pin lock for the main oil pipe tubular nut on the 'Buzzard' engine. | 13th Aug 1920 | West Wittering \ E \ August1920 Scan37 | |
| Requesting a model of a distribution board be sent to West Wittering for Mr. Royce's inspection. | 8th Aug 1920 | West Wittering \ E \ August1920 Scan38 | |
| Drawings and modifications for the 'Buzzard' engine's wheelcase and gears. | 1st Aug 1920 | West Wittering \ E \ August1920 Scan39 | |
| Outlining the design of the offside 'Buzzard' cylinder head in relation to the near side version. | 17th Aug 1930 | West Wittering \ E \ August1920 Scan40 | |
| Describing an alternative operating device for the reserve fuel valve suggested by Mr. Royce. | 20th Aug 1920 | West Wittering \ E \ August1920 Scan41 | |
| Sketch of an operating device for a reserve fuel valve, employing a sylphon tube and a protective cover. | 19th Aug 1920 | West Wittering \ E \ August1920 Scan42 | |
| Possibility that blown fuses caused a Smith dynamo to overheat on 6 EX. | 24th Aug 1920 | West Wittering \ E \ August1920 Scan43 | |
| Wiring, starter motor, and brush issues on chassis 6 EX. | 28th Aug 1920 | West Wittering \ E \ August1920 Scan44 | |
| Difficulty in accessing fittings near the clutch due to a narrow opening and a long scuttle. | 24th Aug 1920 | West Wittering \ E \ August1920 Scan45 | |
| Telegram inquiring about the failure mode of Smith versus Lucas electrical machines when a circuit fault occurs. | 24th Aug 1920 | West Wittering \ E \ August1920 Scan47 | |
| Telegram received by telephone reporting a damaged dynamo due to a blown fuse in the armature circuit. | 25th Aug 1920 | West Wittering \ E \ August1920 Scan48 | |
| Telegram message regarding fuses in a field circuit. | 9th Jul 1918 | West Wittering \ E \ August1920 Scan49 | |
| Telegram confirmation regarding a dynamo suspension tube cap, instructing to scrap the current stock and modify the forging. | 27th Aug 1920 | West Wittering \ E \ August1920 Scan50 | |
| Suitable insulation materials for fuse contacts and dashboards, comparing elasticity and heat resistance. | 30th Aug 1920 | West Wittering \ E \ August1920 Scan51 | |
| Outlining Mr. Royce's requested modifications for a side petrol filler on the 40/50 HP chassis. | 27th Aug 1920 | West Wittering \ E \ August1920 Scan52 | |
| Typed memo from E. to D.A. regarding modifications and feedback from Mr. Royce. | 1st Aug 1920 | West Wittering \ E \ August1920 Scan53 | |
| Design of a distributing board and the potential for a dynamo to burn out under open circuit conditions. | 30th Aug 1920 | West Wittering \ E \ August1920 Scan54 | |
| Cutouts, oxidised contacts, and the material for fuses. | 1st Aug 1920 | West Wittering \ E \ August1920 Scan55 | |
| The design and installation of a distributing board and associated wiring for a chassis. | 28th Aug 1920 | West Wittering \ E \ August1920 Scan56 | |
| Design modifications for a petrol level indicator and spare fuel device. | 30th Aug 1920 | West Wittering \ E \ August1920 Scan57 | |
| With sketches detailing design alterations for a tank's lid, sump, and drain plug. | 28th Aug 1920 | West Wittering \ E \ August1920 Scan58 | |
| Instructions from Mr. Royce regarding design specifications for an indicator, needle valve, and filter, including a sketch with clearances. | 8th Aug 1920 | West Wittering \ E \ August1920 Scan59 | |
| Construction of a copper-plated cork float and the design of baffles in a petrol tank. | 1st Aug 1920 | West Wittering \ E \ August1920 Scan60 | |
| Specifications for the distribution board on the 40/50 HP chassis, detailing materials, paint colours and terminal design. | 31th Aug 1920 | West Wittering \ E \ August1920 Scan61 | |
| Design and forging issue with a Dynamo Suspension Clip. | 31th Aug 1920 | West Wittering \ E \ August1920 Scan62 | |
| Development of new ignition locks and combined control fittings. | 3rd Sep 1920 | West Wittering \ E \ August1920 Scan63 | |
| 'Buzzard' oil filter and drawing No. Lec.1223. | 5th Jul 1920 | West Wittering \ E \ July1920 Scan0 | |
| Letter regarding the quarter-scale general arrangement drawing for the 'Buzzard' engine. | 5th Jul 1920 | West Wittering \ E \ July1920 Scan1 | |
| Drawings and design proposals for the 'Buzzard' crankcase. | 2nd Jul 1920 | West Wittering \ E \ July1920 Scan2 | |
| Design specifications for an aluminium piston for repair cars. | 2nd Jul 1920 | West Wittering \ E \ July1920 Scan3 | |
| Letter discussing drawings and removal instructions for the water pump and dynamo on the 'Buzzard' engine. | 5th Jul 1920 | West Wittering \ E \ July1920 Scan4 | |
| Rear ball bearing on the first motion shaft of the 40/50 HP gearbox. | 17th Jul 1920 | West Wittering \ E \ July1920 Scan5 | |
| Modifications to suspension springs for improved ride quality and testing. | 23th Jul 1920 | West Wittering \ E \ July1920 Scan6 | |
| Alternative design for the 'Buzzard' cylinder block, including a sketch. | 22th Jul 1920 | West Wittering \ E \ July1920 Scan7 | |
| Design of a die-cast oil relief valve for the 'Buzzard' aero engine. | 24th Jul 1920 | West Wittering \ E \ July1920 Scan8 | |
| Requesting an order for Vulture engine crank forgings with reference to drawing Lec.1255. | 26th Jul 1920 | West Wittering \ E \ July1920 Scan9 | |
| Theorizing that cylinder jacket failures are caused by torsion from differential temperatures in exhaust and induction piping. | 29th Jul 1920 | West Wittering \ E \ July1920 Scan10 | |
| Letter discussing a provisional specification and patenting strategy for an electric starter. | 29th Jul 1920 | West Wittering \ E \ July1920 Scan11 | |
| Description of a starter motor mechanism involving a press button, main circuit switch, and multiple circuit branches. | 30th Jul 1920 | West Wittering \ E \ July1920 Scan12 | |
| Telegram received by telephone discussing a consultation and scheme. | 30th Jul 1920 | West Wittering \ E \ July1920 Scan13 | |
| Telegram message from Royce regarding a preference for a 'four' scheme over an 'earth' scheme, pending lamp availability. | 9th Feb 1919 | West Wittering \ E \ July1920 Scan14 | |
| Drawing made for a Smith Dynamo Type 2D, requesting a blueprint for reference. | 2nd Aug 1920 | West Wittering \ E \ July1920 Scan15 | |
| Design and modifications for the 'Vulture' piston, based on suggestions from Mr. Royce. | 1st Jul 1920 | West Wittering \ E \ July1920 Scan16 | |
| The 'Buzzard' engine starter motor, referencing drawing No. Lec.1259. | 2nd Aug 1920 | West Wittering \ E \ July1920 Scan17 | |
| New drawing for the 'Buzzard' oil pump, material changes, and requesting a blueprint. | 2nd Aug 1930 | West Wittering \ E \ July1920 Scan18 | |
| Drawing Lec.1263 for 'Buzzard' engine crankcase rear arms, detailing differences between the left and right arms. | 20th Jul 1931 | West Wittering \ E \ July1920 Scan19 | |
| Particulars of the rear end of the 'Buzzard' crankcase, referencing drawing No. LeC.1262. | 1st Jul 1920 | West Wittering \ E \ July1920 Scan20 | |
| Query to Mr. Royce about the correct manufacturing process for connecting rods, specifically the sequence of drilling and splitting. | 1st Jul 1920 | West Wittering \ E \ July1920 Scan21 | |
| Preliminary report on the American Bosch ZR6 magneto, comparing its weight and construction to the German and Watford versions. | 20th Jul 1920 | West Wittering \ E \ July1920 Scan22 | |
| Comparison of American ZR6, German Bosch, and Watford magnetos, focusing on noise, cam design, and reliability. | 20th Jul 1920 | West Wittering \ E \ July1920 Scan23 | |
| Page 3 of a comparative test report on Watford and American Bosch magnetos, with a recommendation against standardising the American Bosch ZR6. | 20th Jul 1920 | West Wittering \ E \ July1920 Scan24 | |
| Preliminary remarks on an investigation into shunt wound dynamos, vibrator regulators, and a sample Bijur generator. | 22th Jul 1920 | West Wittering \ E \ July1920 Scan25 | |
| Note explaining the standardized definition of an 'ideal battery' for comparing dynamo performance. | 22th Jul 1920 | West Wittering \ E \ July1920 Scan26 | |
| Comparison of shunt wound machines, including Bosch, Smith, and Bijur, focusing on performance and output curves. | 22th Jul 1920 | West Wittering \ E \ July1920 Scan27 | |
| | | | |
