| Description | Date | Identifier | |
| Order request for headlamps for a Bentley II chassis, which was subsequently cancelled. | 10th Dec 1937 | Box 167 \ 1 img223 | |
| Internal request to obtain an all-chromium fog lamp with spherical joints from Butlers Ltd. | 10th Dec 1937 | Box 167 \ 1 img224 | |
| Adaptability of Lucas R.100 headlamps for continental use and comparing different lighting systems. | 15th Dec 1937 | Box 167 \ 1 img225 | |
| Proposal to modify headlamps with a handed dipping reflector for driving in Continental Europe. | 15th Dec 1937 | Box 167 \ 1 img226 | |
| Wiring diagrams for a headlamp dipper system showing the present system, required extra parts, and a configuration for continental use. | 15th Dec 1935 | Box 167 \ 1 img227 | |
| Despatch note to Messrs. Butlers Ltd. for the exchange of a Type FL.57C Fog Lamp. | 21th Dec 1937 | Box 167 \ 1 img228 | |
| Fitting of two pairs of improved P.100 headlamps to experimental cars. | 6th Jan 1938 | Box 167 \ 1 img229 | |
| Request to obtain one dozen 6V 3WT pea lamps, with a sample provided. | 11th Jan 1938 | Box 167 \ 1 img230 | |
| Testing headlamp dipping arrangements for English and Continental driving conditions. | 12th Jan 1938 | Box 167 \ 1 img231 | |
| The effectiveness of fog lamps and potential improvements using dipping reflectors. | 12th Jan 1938 | Box 167 \ 1 img232 | |
| Headlight configurations suitable for both English and Continental driving conditions. | 13th Jan 1938 | Box 167 \ 1 img233 | |
| The effectiveness of different headlamp and fog lamp configurations for driving in fog. | 13th Jan 1938 | Box 167 \ 1 img234 | |
| The unsuitability of the R.100 headlamp's dipping reflector for use abroad and the impractical adjustments required. | 13th Jan 1938 | Box 167 \ 1 img235 | |
| Trial of a spotlight with a dipping reflector. | 13th Jan 1938 | Box 167 \ 1 img236 | |
| Notification about the substitution of Wind Tone Horns on Wraith 6 Sets due to supplier unavailability. | 14th Jan 1938 | Box 167 \ 1 img237 | |
| Order for two Lucas D.10 type Festoon lamps with an ebony black finish. | 18th Jan 1938 | Box 167 \ 1 img238 | |
| The replacement of a fog lamp on chassis B.43.AE. | 18th Jan 1938 | Box 167 \ 1 img239 | |
| Failed 25/30 headlamp bulb that caused a main fuse to blow, resulting in a complete blackout. | 19th Jan 1938 | Box 167 \ 1 img240 | |
| New scheme for adapting Lucas R.IOO headlamps for Continental use, proposing a switch instead of rewiring. | 20th Jan 1938 | Box 167 \ 1 img241 | |
| Dipping scheme changeover for R.100 headlamps, indicating Lucas will supply the model parts. | 28th Jan 1938 | Box 167 \ 1 img242 | |
| Query regarding the implementation and success of a dipping scheme changeover for R.100 headlamps. | 16th Feb 1938 | Box 167 \ 1 img243 | |
| Requesting the creation of a prototype under-bonnet lamp for testing purposes. | 16th Feb 1938 | Box 167 \ 1 img244 | |
| The standardization of 48-watt headlamp bulbs. | 2nd Mar 1938 | Box 167 \ 1 img245 | |
| Letter from Joseph Lucas Ltd regarding the availability and lead time for non-standard 12V, 48W bulbs for R100 Headlamps. | 2nd Mar 1938 | Box 167 \ 1 img246 | |
| The costs and functionality for Lucas R.100 headlamps with continental changeover switches. | 4th Mar 1938 | Box 167 \ 1 img247 | |
| Proposing a trial of standard headlamps with two different dip settings. | 11th Mar 1938 | Box 167 \ 1 img248 | |
| Suggesting a modification to the Lucas R.100 headlamp dip plunger for Phantom III, Wraith, and Bentley models. | 10th Mar 1938 | Box 167 \ 1 img249 | |
| Shorter plunger for headlamps and reducing the angle of dip for a continental changeover. | 11th Mar 1938 | Box 167 \ 1 img250 | |
| Letter to Joseph Lucas Ltd. regarding the design of dummy headlamps for a Bentley model. | 11th Mar 1938 | Box 167 \ 1 img251 | |
| Proposing a trial of two pairs of standard headlamps with different dip settings. | 11th Mar 1938 | Box 167 \ 1 img252 | |
| Modification to the headlamp plunger to reduce the dipping angle for English and Continental driving conditions. | 10th Mar 1938 | Box 167 \ 1 img253 | |
| Plunger dimensions and headlamp dip for Lucas R.100 units on Phantom III, Wraith, and Bentley models. | 11th Mar 1938 | Box 167 \ 1 img254 | |
| Proposal for under bonnet lighting for all chassis, utilising a Lucas Inspection Lamp. | 11th Mar 1938 | Box 167 \ 1 img255 | |
| Projected design for headlamps and passlamps for the Myth Chassis. | 12th Nov 1940 | Box 167 \ 1 img256 | |
| Instructions and parts list for installing under-bonnet lighting for all chassis, in particular the Wraith. | 28th Mar 1938 | Box 167 \ 1 img257 | |
| Letter to Joseph Lucas Ltd. regarding the procurement and specifications of headlamps. | 30th Mar 1938 | Box 167 \ 1 img258 | |
| The arrangement of a light under the bonnet for the Wraith III. | 2nd Apr 1938 | Box 167 \ 1 img259 | |
| Headlamp brackets, discussing alternative lamp models and suggesting a brass die-cast socket to reduce costs. | 11th Apr 1938 | Box 167 \ 1 img260 | |
| Lamps, horns, and fittings for the Bentley 50 model, including alternative parts and required blueprints. | 29th Apr 1938 | Box 167 \ 1 img261 | |
| Tests carried out on 3.5-volt lamps for instrument-group lighting following frequent failures. | 10th Jun 1938 | Box 167 \ 1 img262 | |
| The lifespan testing of lamps under various voltage conditions and wiring configurations. | 10th Jun 1938 | Box 167 \ 1 img263 | |
| Analysis of the performance, issues, and potential solutions for running a set of lamps, focusing on voltage sensitivity and lifespan. | 15th Jun 1938 | Box 167 \ 1 img264 | |
| Proposed change to the instrument group lighting for the Wraith model. | 15th Jun 1938 | Box 167 \ 1 img265 | |
| Proposal for the instrument group lighting on the Wraith model. | 15th Jun 1938 | Box 167 \ 1 img266 | |
| Letter from James Neale & Sons Ltd concerning tests and improvements to their 'METEOR' No-Dazzle Driving Lamp. | 24th Jun 1938 | Box 167 \ 1 img267 | |
| The return of a corroded Lucas QBD.167-E.5. type headlamp reflector for repair. | 12th Jul 1938 | Box 167 \ 1 img268 | |
| Order for half a dozen bulbs for a Motorola radio. | 13th Jul 1938 | Box 167 \ 1 img269 | |
| Letter from Joseph Lucas Ltd. regarding the despatch of a repaired headlamp. | 19th Jul 1938 | Box 167 \ 1 img270 | |
| Letter from The British Thomson-Houston Company Ltd regarding newly developed twin filament headlamp bulbs. | 3rd Aug 1938 | Box 167 \ 1 img271 | |
| Letter from a lamp manufacturer confirming the dispatch of sample anti-dazzle headlamp bulbs for testing. | 8th Aug 1938 | Box 167 \ 1 img272 | |
| Letter to British Thomson Houston Co. Ltd. regarding the incompatibility of submitted twin filament headlamp bulbs. | 19th Aug 1938 | Box 167 \ 1 img273 | |
| Returning unsuitable headlamp bulbs to the manufacturer for replacement. | 20th Aug 1938 | Box 167 \ 1 img274 | |
| Returning unsuitable headlamp bulbs and a holder to the manufacturer for correctly dimensioned replacements. | 24th Aug 1938 | Box 167 \ 1 img275 | |
| Letter regarding the testing of 'U'Filament Regulation Headlamps. | 24th Aug 1938 | Box 167 \ 1 img276 | |
| Letter from a supplier regarding incorrect headlamp bulbs and requesting further specifications. | 30th Aug 1938 | Box 167 \ 1 img277 | |
| Arranging for a headlamp bulb to be despatched to The British Thomson-Houston Co. Ltd. | 31th Aug 1938 | Box 167 \ 1 img278 | |
| Letter to The British Thomson-Houston Co. Ltd. about special headlamp bulbs. | 31th Aug 1938 | Box 167 \ 1 img279 | |
| The postage of a sample headlamp bulb to The British Thomson-Houston Co. Ltd. | 31th Aug 1938 | Box 167 \ 1 img280 | |
| Letter from The British Thomson-Houston Company regarding the dispatch of sample regulation bulbs. | 5th Sep 1938 | Box 167 \ 1 img281 | |
| Recommendation to sell a pair of obsolete old type P.100 headlamps for £1. | 16th Sep 1938 | Box 167 \ 1 img282 | |
| Requesting the dispatch of various lamp bulbs to France for testing purposes. | 21th Jan 1938 | Box 167 \ 1 img283 | |
| Recommendation to sell a pair of obsolete Bosch headlamps to a Mr. C.S. Steadman for £1. | 25th Oct 1938 | Box 167 \ 1 img284 | |
| Requesting to obtain 4 dozen 48-watt headlamp bulbs for the standard open type headlamp. | 26th Oct 1938 | Box 167 \ 1 img285 | |
| Request to obtain four glasses for a standard R.R. type Lucas headlamp. | 8th Nov 1938 | Box 167 \ 1 img286 | |
| Proposal and parts list for mounting an instrument lamp on a Bentley III steering column. | 8th Nov 1938 | Box 167 \ 1 img287 | |
| Return of incorrectly supplied Lucas headlamp dipping switches. | 8th Nov 1938 | Box 167 \ 1 img288 | |
| Letter from Joseph Lucas Ltd. to W.A. Robotham confirming a meeting on Wednesday the 23rd. | 21th Nov 1938 | Box 167 \ 1 img289 | |
| Letter from Joseph Lucas Ltd concerning defective bulbs and voltage regulators. | 21th Nov 1938 | Box 167 \ 1 img290 | |
| Secret memo detailing price reductions for chassis side lamps and headlamps on P.III, Wraith, and Bentley chassis. | 24th Nov 1938 | Box 167 \ 1 img291 | |
| Letter from Joseph Lucas Limited regarding a list of suitable bulbs for lamps for an instruction book. | 25th Nov 1938 | Box 167 \ 1 img292 | |
| List of lamp and bulb types for cars, with part numbers and specifications. | 28th Nov 1938 | Box 167 \ 1 img293 | |
| Letter from Joseph Lucas Limited discussing high-frequency horns and providing feedback on a test drive of the 'Wraith', noting a clutch shudder. | 28th Nov 1938 | Box 167 \ 1 img294 | |
| Page 2 of a letter from Joseph Lucas Limited to W.A. Robotham. | 28th Nov 1938 | Box 167 \ 1 img295 | |
| Letter from Joseph Lucas Limited regarding headlamp terminal readings and clarifying a misunderstanding about regulator unit swamp ratios. | 29th Nov 1938 | Box 167 \ 1 img296 | |
| Unprotected cables to the side lamps passing through the wings and the need for protection. | 14th Dec 1938 | Box 167 \ 1 img297 | |
| Visit from Mr. Oliver Lucas to discuss proposals and pricing for headlamps. | 15th Dec 1938 | Box 167 \ 1 img298 | |
| Cost comparison and specification discussion for vehicle lamp sets. | 15th Dec 1938 | Box 167 \ 1 img299 | |
| Cost savings and modifications for various vehicle components including lamps, pumps, indicators, and wipers. | 15th Dec 1938 | Box 167 \ 1 img300 | |
| Pricing, failures, and specifications of various electrical components. | 15th Dec 1938 | Box 167 \ 1 img301 | |
| Box type rear number plates, ignition distributors, shock dampers, and a dynamo. | 15th Dec 1938 | Box 167 \ 1 img302 | |
| The testing of HF.728 and WT.13/WT.23 Mellotone horns. | 19th Dec 1938 | Box 167 \ 1 img303 | |
| Typed message regarding a scheduling conflict for Mr. Kelly, suggesting Thursday as an alternative. | 19th Dec 1938 | Box 167 \ 1 img304 | |
| Letter from Mead, McLean & Co Ltd regarding the postponement of a visit to test a new headlamp. | 20th Dec 1938 | Box 167 \ 1 img305 | |
| Internal order memo for electrical components for chassis models 10.B.V and 3.B.50. | 21th Dec 1938 | Box 167 \ 1 img306 | |
| Letter to O. Lucas regarding the decision not to standardize low-geared steering on the Wraith. | 22th Dec 1938 | Box 167 \ 1 img307 | |
| Revised design for an instrumental lamp mounting. | 4th Jan 1939 | Box 167 \ 1 img308 | |
| Letter to Joseph Lucas Ltd. detailing repeated tests of volt-drop in a headlamp circuit. | 4th Jan 1939 | Box 167 \ 1 img309 | |
| Voltage readings at various tapping points to diagnose a potential bad connection. | 4th Jan 1939 | Box 167 \ 1 img310 | |
| Scheduling a meeting to discuss the method of anti-dazzle headlamps to be adopted. | 10th Jan 1939 | Box 167 \ 1 img311 | |
| Comparison of present and proposed anti-dazzle headlamp systems and their test results. | 10th Jan 1939 | Box 167 \ 1 img312 | |
| Scheduling a meeting to discuss the method of anti-dazzle to be adopted for headlamps. | 10th Jan 1939 | Box 167 \ 1 img313 | |
| Present and proposed anti-dazzle headlight systems and the results of winter tests. | 10th Jan 1939 | Box 167 \ 1 img314 | |
| Instructions regarding lamps, horns, and fittings for Bentley Chassis 10.B.V. & 3.B.50. | 12th Jan 1939 | Box 167 \ 1 img315 | |
| The redesign of headlamps and horns for model B.50. | 13th Jan 1939 | Box 167 \ 1 img316 | |
| Return of ten incorrect Bentley tail lamps supplied by Messrs. Lucas and arranging for correct replacements. | 24th Jan 1939 | Box 167 \ 1 img317 | |
| Request for a covering order for a pair of Marchal Headlamps that have already been received. | 26th Jan 1939 | Box 167 \ 1 img318 | |
| Advertisement sheet for 'Desilux' Marchal 'Dual Purpose' fog and auxiliary lamps. | 26th Jan 1939 | Box 167 \ 1 img319 | |
| Advertisement for Superphare Marchal 'Strilux' headlamps, detailing models, prices, and features. | 1st Jan 1935 | Box 167 \ 1 img320 | |
| Advertisement for Marchal anti-glare lamps. | 1st Jan 1935 | Box 167 \ 1 img321 | |
| Instruction to forward tail lamp brackets and stop/tail lamps for Bentley cars to Messrs. Park Wards. | 7th Feb 1939 | Box 167 \ 1 img322 | |
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