| Description | Date | Identifier | |
| Delivery and testing of artillery type steel wheels for 20 HP and 40/50 HP models. | 13th Dec 1926 | Box 53 \ 3 Scan205 | |
| Proposal for adapting a standard two-arm side spare wheel carrier for Phantom steel artillery wheels. | 22th Dec 1926 | Box 53 \ 3 Scan206 | |
| Weight specifications for Dunlop Steel Artillery Wheels, Type H.2 (Goshawk). | 30th Dec 1926 | Box 53 \ 3 Scan207 | |
| Standardization and ordering of steel artillery type wheels with well base rims. | 10th Jan 1927 | Box 53 \ 3 Scan208 | |
| Raising concerns about delays and process changes for testing steel artillery wheels. | 20th Jan 1927 | Box 53 \ 3 Scan209 | |
| Procedure for testing artillery wheels, specifically using a bumping rig versus road testing. | 18th Jan 1927 | Box 53 \ 3 Scan210 | |
| Clarifying a previous decision regarding the ordering of steel artillery wheels and the necessity of bumping tests. | 17th Jan 1927 | Box 53 \ 3 Scan211 | |
| Responding to a query about the status and testing of steel artillery wheels for 20 HP and Phantom models. | 24th Jan 1927 | Box 53 \ 3 Scan212 | |
| History of correspondence and testing regarding Steel Artillery Wheels with Wellbase Rims. | 24th Jan 1927 | Box 53 \ 3 Scan213 | |
| Test eliminations, production concerns, and supply issues related to tyres and rims. | 20th Jan 1927 | Box 53 \ 3 Scan214 | |
| Letter regarding the ordering and testing of Steel Artillery Wheels with Wellbase Rims. | 28th Jan 1927 | Box 53 \ 3 Scan215 | |
| The receipt of experimental steel artillery wheels for the 40/50 HP chassis and arranging for Dunlop to produce 12 sets. | 2nd Feb 1927 | Box 53 \ 3 Scan216 | |
| Modified side carrier for artillery wheels for the Phantom model. | 28th Feb 1927 | Box 53 \ 3 Scan217 | |
| Letter from Dunlop Rim & Wheel Co. Ltd. proposing the supply of a set of Wire Wheels and enclosing blueprints. | 3rd May 1927 | Box 53 \ 3 Scan218 | |
| Letter to The Dunlop Rubber Co. concerning the supply of 31' and 33' tyres and the wheel question. | 6th May 1927 | Box 53 \ 3 Scan219 | |
| Requesting an investigation into modifying hubs to enable comparative testing of artillery and wire wheels on the same front axle. | 18th May 1927 | Box 53 \ 3 Scan220 | |
| Standardisation report on steel artillery wheels as an alternative to wire wheels. | 21th Apr 1927 | Box 53 \ 3 Scan221 | |
| The costs involved in offering steel artillery wheels as an alternative to wire wheels. | 9th May 1927 | Box 53 \ 3 Scan222 | |
| Standardisation of chassis parts, specifically regarding the use of artillery wheels. | 23th May 1927 | Box 53 \ 3 Scan223 | |
| Standardisation of artillery wheels for the X.4586 - 20 HP model. | 30th May 1927 | Box 53 \ 3 Scan224 | |
| Proposal to reduce the width of standard wire wheels for the Phantom model by adapting artillery wheel hubs. | 1st Oct 1927 | Box 53 \ 3 Scan225 | |
| Proposed narrower wire wheels and hubs for the 20 HP chassis. | 8th Oct 1927 | Box 53 \ 3 Scan226 | |
| The testing of a new voltage regulator from The British Lighting & Ignition Company using a 20 HP dynamo. | 9th Jun 1923 | Box 53 \ 3 Scan227 | |
| Testing of a voltage regulator from The British Lighting & Ignition Company on a 20 HP dynamo. | 9th May 1923 | Box 53 \ 3 Scan228 | |
| B.L.I.C. rotating magnet magneto and a new voltage control system. | 9th Jun 1923 | Box 53 \ 3 Scan229 | |
| Hand-drawn schematic of a DC motor circuit with a battery. | 18th Jun 1923 | Box 53 \ 3 Scan230 | |
| Receipt of a dynamo for approval and its subsequent forwarding for a voltage regulator. | 18th Jun 1923 | Box 53 \ 3 Scan231 | |
| Letter to British Lighting & Ignition Co. Ltd. regarding the dispatch of a 20 HP dynamo for experimental testing and adaptation. | 18th Jun 1923 | Box 53 \ 3 Scan232 | |
| Letter from a supplier confirming receipt of a 20-HP chassis dynamo and that modifications are underway. | 21th Jun 1923 | Box 53 \ 3 Scan233 | |
| Letter regarding unsatisfactory 'Z' Le Carbone Brushes on a 20 HP generator and the supply of alternative brushes for testing. | 10th Jul 1923 | Box 53 \ 3 Scan234 | |
| Continued letter providing instructions on using brushes and mentioning standard Z brushes. | 10th Jul 1923 | Box 53 \ 3 Scan235 | |
| Requesting a follow-up with B.L.I.C. on the progress of adapting a voltage regulator for a Goshawk dynamo. | 5th Sep 1923 | Box 53 \ 3 Scan236 | |
| Correspondence regarding experimental work on a B.L.I.C. electrolytic voltage regulator for a 20 HP car. | 18th Sep 1923 | Box 53 \ 3 Scan237 | |
| Letter to The British Lighting & Ignition Co. Ltd. acknowledging receipt of an electrolytic voltage control and a 20 HP chassis dynamo for testing. | 19th Oct 1923 | Box 53 \ 3 Scan238 | |
| Letter confirming the receipt of an Electrolytic Dynamo and Battery Controller for testing. | 20th Oct 1923 | Box 53 \ 3 Scan239 | |
| List of test procedures for a B.L.I.C. voltage regulator applied to a 20 HP dynamo. | 29th Jan 1924 | Box 53 \ 3 Scan240 | |
| Request for a report on the Electrolyte Voltage Regulator currently under observation for The Blic Company. | 11th Apr 1924 | Box 53 \ 3 Scan241 | |
| The investigation status of the B.L.I.C. Electrolytic Voltage Regulator. | 12th Apr 1924 | Box 53 \ 3 Scan242 | |
| Letter from The British Lighting & Ignition Co. Ltd. following up on a previously suspended investigation into an Electrolytic Voltage Regulator. | 17th Sep 1924 | Box 53 \ 3 Scan243 | |
| Status of tests on a B.L.I.C. Voltage Regulator. | 20th Sep 1924 | Box 53 \ 3 Scan244 | |
| The location of a Dynamo, an Electrolytic Regulator, and a Regulator Resistance owned by another company. | 27th Jan 1925 | Box 53 \ 3 Scan245 | |
| The testing and status of a B.L.I.C. electrolytic voltage regulator. | 28th Jan 1925 | Box 53 \ 3 Scan246 | |
| Cover letter forwarding correspondence from the British Lighting & Ignition Co. Ltd. | 4th Feb 1925 | Box 53 \ 3 Scan247 | |
| Letter from The British Lighting & Ignition Co. Ltd. regarding the ownership of a dynamo and requesting a report on electrolytic regulator equipment. | 3rd Feb 1925 | Box 53 \ 3 Scan248 | |
| Letter to British Lighting & Ignition Co. Ltd. regarding a Dynamo and Electrolytic Regulator. | 28th Jan 1925 | Box 53 \ 3 Scan249 | |
| Instructions and progress report on testing a BLIC Dynamo Equipment. | 9th Feb 1925 | Box 53 \ 3 Scan250 | |
| Results of testing an electrical apparatus and dynamo under various loads. | 29th Jun 1920 | Box 53 \ 3 Scan251 | |
| Instructions regarding an investigation into dynamo characteristics for battery charging requirements. | 29th Sep 1920 | Box 53 \ 3 Scan252 | |
| Letter regarding experimental bench tests on electrolytic regulator equipment and issues with cell gassing. | 10th Feb 1925 | Box 53 \ 3 Scan253 | |
| Thank you letter regarding information provided on Electrolytic Regulator Equipment. | 13th Feb 1925 | Box 53 \ 3 Scan254 | |
| Query regarding outstanding 'Sale or Return' items delivered in 1923 from the British Lighting & Ignition Co. Ltd. | 24th Feb 1926 | Box 53 \ 3 Scan255 | |
| Retention of a B.L.I.C. Electrolytic Voltage Regulator for ongoing investigations. | 1st Mar 1926 | Box 53 \ 3 Scan256 | |
| Requesting the availability of a spare 20 HP chassis. | 16th Jan 1923 | Box 53 \ 4 Scan001 | |
| Sending a 20 HP chassis to the USA for cold weather testing to adapt it for American conditions. | 19th Jan 1923 | Box 53 \ 4 Scan002 | |
| Need to send a 20 HP chassis to America for cold weather experiments. | 19th Jan 1923 | Box 53 \ 4 Scan003 | |
| Proposal to send an experimental 20 HP car to the U.S.A. for evaluation and potential sales. | 19th Jan 1923 | Box 53 \ 4 Scan004 | |
| The shipment of a 20 HP car and driver to America. | 29th Jan 1923 | Box 53 \ 4 Scan005 | |
| Cancelling a previous communication about a 20 HP car for America. | 30th Jan 1923 | Box 53 \ 4 Scan006 | |
| Selection of a body and chassis for a 20 HP car destined for the U.S.A. | 29th Jan 1923 | Box 53 \ 4 Scan007 | |
| Feedback on the springing of a 20-HP car in America and the proposal to use stronger springs. | 4th Apr 1923 | Box 53 \ 4 Scan008 | |
| Fitting stronger springs for a 20-HP car, number 44-G-3, sent to America. | 5th Apr 1923 | Box 53 \ 4 Scan009 | |
| The experiences and issues with a 20-HP car during testing in the U.S.A. | 20th Apr 1923 | Box 53 \ 4 Scan010 | |
| Various vehicle faults including suspension, engine, and instrument issues. | 20th Apr 1923 | Box 53 \ 4 Scan011 | |
| Vehicle performance issues, ground clearance, dynamo function, and requests from the Springfield branch. | 1st Apr 1923 | Box 53 \ 4 Scan012 | |
| Complaints from America regarding intermittent fuel feed and squeaking brakes on the 20-HP chassis. | 7th Jan 1925 | Box 53 \ 4 Scan013 | |
| Internal memorandum discussing solutions for carburettor choking and brake drum complaints on 20-HP cars. | 1st Jan 1925 | Box 53 \ 4 Scan014 | |
| Difficulties in undertaking the production of a left-handed 20 HP chassis for the USA. | 4th Oct 1928 | Box 53 \ 4 Scan015 | |
| Development of the S-S and 20 HP cars, and the 'mirror-reflexion' principle for producing left-hand drive models. | 14th Sep 1928 | Box 53 \ 4 Scan016 | |
| Principle of symmetrical parts to facilitate the production of left-hand drive cars for the S.S. and India III models. | 1st Sep 1923 | Box 53 \ 4 Scan017 | |
| Request to supply an order number for chassis No. 36-HG in connection with the 40/50 HP production 10,000 miles test. | 1st Sep 1923 | Box 53 \ 4 Scan018 | |
| Confirming an order has been raised to cover the work and expenses for a 10,000 miles production test on chassis 36-HG. | 6th Sep 1923 | Box 53 \ 4 Scan019 | |
| Outlining the routine and progress of a 10,000-mile test on a 20 HP production car. | 20th Sep 1923 | Box 53 \ 4 Scan020 | |
| Methodology and rationale for a 10,000-mile test on a production chassis. | 28th Sep 1923 | Box 53 \ 4 Scan021 | |
| Outlining the methodology and considerations for a 10,000-mile production car test, including reporting frequency and performance checks. | 28th Sep 1923 | Box 53 \ 4 Scan022 | |
| Testing methodology and progress of a 20 HP car's 10,000-mile test. | 28th Sep 1923 | Box 53 \ 4 Scan023 | |
| Continuation page discussing a car testing programme, including a run in the Lake District and a proposal for testing by a 'fool'. | 4th Oct 1923 | Box 53 \ 4 Scan024 | |
| Provision of bodies for 10,000-mile chassis tests. | 4th Oct 1923 | Box 53 \ 4 Scan025 | |
| Instructing 'Hs.' to proceed with a rapid road test based on CJ's remarks on a previous memo. | 4th Oct 1923 | Box 53 \ 4 Scan026 | |
| The arrangement of rapid tests for the first chassis in each batch, specifically for the 40/50HP and 20HP models. | 1st Oct 1923 | Box 53 \ 4 Scan027 | |
| Planning and handover of 10,000-mile production tests for various chassis. | 10th Oct 1923 | Box 53 \ 4 Scan028 | |
| Distinguishing between experimental and production 10,000-mile chassis tests. | 8th Oct 1923 | Box 53 \ 4 Scan029 | |
| Preparation and testing of an 'R' Series Chassis. | 10th Oct 1923 | Box 53 \ 4 Scan030 | |
| Final test report listing issues for Chassis No. 12-EM after a 10,000-mile run. | 30th Oct 1923 | Box 53 \ 4 Scan031 | |
| 248.9-mile road test of chassis 12-EM, detailing performance, consumption, and issues encountered. | 19th Nov 1923 | Box 53 \ 4 Scan032 | |
| The collection of a Barker Saloon chassis from Lillie Hall and the inability to fit 4-wheel brakes. | 19th Nov 1923 | Box 53 \ 4 Scan033 | |
| The condition of a 40/50 10,000-mile production car, 12-EM, after testing. | 23th Nov 1923 | Box 53 \ 4 Scan034 | |
| 30-mile test drive of a 40/50 production car, focusing on its performance and ineffective foot brakes. | 26th Nov 1923 | Box 53 \ 4 Scan035 | |
| 30-mile test drive of a 40/50 10,000 miles production car. | 26th Nov 1923 | Box 53 \ 4 Scan036 | |
| Loose wheel spokes found on a 10,000-mile production trial car, suggesting the wheels be returned to Dunlop for examination. | 27th Nov 1923 | Box 53 \ 4 Scan037 | |
| List of criticisms following a 10,000-mile test run of chassis No. 12-EM. | 29th Nov 1923 | Box 53 \ 4 Scan038 | |
| Car inspection results, component failures, and passenger complaints regarding exhaust fumes. | 29th Nov 1923 | Box 53 \ 4 Scan039 | |
| Letter concerning a complaint about a Lucas dynamo on the 10,000 Miles Trial Car 12-EM and a delay in its despatch. | 29th Nov 1923 | Box 53 \ 4 Scan040 | |
| Letter from Lucas Electrical Co. Ltd. detailing the examination and repair of a noisy dynamo returned due to bearing noise. | 28th Nov 1923 | Box 53 \ 4 Scan041 | |
| Unsatisfactory braking performance on a 40/50 chassis with four-wheel brakes. | 30th Nov 1923 | Box 53 \ 4 Scan042 | |
| Requesting an inspection of a dismantled chassis from a 10,000-mile trial car before cleaning. | 4th Dec 1923 | Box 53 \ 4 Scan043 | |
| The condition of a 12-EM trial car chassis after a 10,000-mile test. | 1st Dec 1923 | Box 53 \ 4 Scan044 | |
| Further report on the 12-EM 'S' Series trials after 10,000 miles, detailing component wear and failures. | 7th Dec 1923 | Box 53 \ 4 Scan045 | |
| Page 2 of a vehicle inspection report detailing the condition of various components. | 7th Dec 1923 | Box 53 \ 4 Scan046 | |
| Wear and faults found on various car components after a trial. | 11th Dec 1923 | Box 53 \ 4 Scan047 | |
| Actions required following a 10,000-mile test run and inspection of chassis 12-EM. | 11th Dec 1923 | Box 53 \ 4 Scan048 | |
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