| Description | Date | Identifier | |
| Letter to the Director of Research regarding temperature calculations and testing a squeaky lining material. | 4th Feb 1939 | Box 141 \ 2 scan0253 | |
| Request to send four pieces of Wraith III rear brake lining to the Institution of Automobile Engineers. | 6th Feb 1939 | Box 141 \ 2 scan0254 | |
| Letter from the Automobile Research Committee regarding friction tests on Thermoid lining specimens. | 6th Feb 1939 | Box 141 \ 2 scan0255 | |
| Letter to the Institution of Automobile Engineers regarding a visit to a research station to see a new brake testing rig. | 9th Feb 1939 | Box 141 \ 2 scan0256 | |
| Request to obtain three cast iron discs for a brake test rig and send them to Ferodo Ltd. | 9th Feb 1939 | Box 141 \ 2 scan0257 | |
| Order for brake linings from Ferodo Ltd. | 9th Feb 1939 | Box 141 \ 2 scan0258 | |
| Letter to Ferodo Ltd. regarding a new brake test rig and plans for future testing. | 9th Feb 1939 | Box 141 \ 2 scan0259 | |
| Letter to Messrs. Ferodo Ltd. regarding an order for V.G.90 material and thanking them for building a test rig. | 9th Feb 1939 | Box 141 \ 2 scan0260 | |
| Letter from Ferodo Limited regarding a test rig and orders for brake linings and clutch discs. | 10th Feb 1939 | Box 141 \ 2 scan0261 | |
| Letter from the Automobile Research Committee regarding equipment installed by Ferodo Ltd. | 13th Feb 1939 | Box 141 \ 2 scan0262 | |
| Letter to Ferodo Ltd. requesting proposals for 3 thrust rings in new, hard-wearing, water-resisting materials. | 20th Feb 1939 | Box 141 \ 2 scan0263 | |
| Letter to Ferodo Ltd. requesting the return of brake shoes and acknowledging sample thrust washers for testing. | 3rd Mar 1939 | Box 141 \ 2 scan0264 | |
| Request to order undrilled brake linings from Ferodo Ltd. to specific drawing numbers and materials. | 10th Mar 1939 | Box 141 \ 2 scan0265 | |
| Letter from the Experimental Department to Ferodo Ltd requesting undrilled brake lining samples for a test rig. | 10th Mar 1939 | Box 141 \ 2 scan0266 | |
| Letter from Ferodo Limited discussing brake lining tests and squeal characteristics. | 13th Mar 1939 | Box 141 \ 2 scan0267 | |
| Letter from Ferodo Limited regarding the return and identification of brake shoes and linings. | 14th Mar 1939 | Box 141 \ 2 scan0268 | |
| Letter to Messrs. Ferodo Ltd. regarding mistakenly left brake shoes and requesting a report on whether linings were overheated. | 15th Mar 1939 | Box 141 \ 2 scan0269 | |
| Letter to Ferodo Ltd. regarding brake lining test results, squeak prevention, and the characteristics of different lining materials. | 15th Mar 1939 | Box 141 \ 2 scan0270 | |
| The second and concluding page of a typed letter. | 15th Mar 1939 | Box 141 \ 2 scan0271 | |
| Letter from supplier Ferodo Limited regarding brake and clutch lining samples and testing. | 16th Mar 1939 | Box 141 \ 2 scan0272 | |
| Letter from Ferodo Limited reporting on the examination of brake linings. | 17th Mar 1939 | Box 141 \ 2 scan0273 | |
| Letter to Messrs. Ferodo Ltd. regarding the dispatch of two Thermoid liners. | 17th Mar 1939 | Box 141 \ 2 scan0274 | |
| Letter from Ferodo Limited arranging for testing of samples on a modified test rig. | 23th Mar 1939 | Box 141 \ 2 scan0275 | |
| Letter from Ferodo Limited regarding a meeting and suggestions for a friction lining test rig. | 25th Mar 1939 | Box 141 \ 2 scan0276 | |
| Letter to Ferodo Ltd. with observations and recommendations regarding procedures for their testing rig. | 29th Mar 1939 | Box 141 \ 2 scan0277 | |
| Analysis of torque, deflection, and design issues in a testing apparatus arm and bearing assembly. | 29th Mar 1939 | Box 141 \ 2 scan0278 | |
| Concluding page of a letter with a postscript regarding a programme. | 29th Mar 1939 | Box 141 \ 2 scan0279 | |
| Letter from brake lining manufacturer Ferodo regarding testing linings for a customer's Bentley. | 29th Mar 1939 | Box 141 \ 2 scan0280 | |
| Letter from Ferodo Limited confirming a conversation regarding modifications to a test rig. | 31th Mar 1939 | Box 141 \ 2 scan0281 | |
| Potential change in brake lining material for use in tropical countries. | 21th Apr 1939 | Box 141 \ 2 scan0282 | |
| From Allied Motors Ltd. regarding brake lining specifications due to tropical conditions. | 15th Apr 1939 | Box 141 \ 2 scan0283 | |
| Letter from W.O. Kennington of Delco-Remy & Hyatt Ltd. to W.A. Robotham about a request from Henri Perrot concerning Rolls-Bentley brake linings. | 17th May 1939 | Box 141 \ 2 scan0284 | |
| Official order for brake linings and servo discs from Ferodo Ltd. | 25th May 1939 | Box 141 \ 2 scan0285 | |
| Letter to supplier Ferodo Ltd. regarding the return of incorrect brake linings and issues with servo discs. | 25th May 1939 | Box 141 \ 2 scan0286 | |
| Letter from Ferodo Limited regarding the supply of necessary liners and a meeting. | 27th May 1939 | Box 141 \ 2 scan0287 | |
| Letter to Ferodo Ltd. enclosing a sample of VG.90 material for confirmation of its type. | 1st Jun 1939 | Box 141 \ 2 scan0288 | |
| Pricing, supply and fixing of Ferodo brake liners by New Hudsons. | 2nd Jun 1939 | Box 141 \ 2 scan0289 | |
| Letter from supplier Ferodo regarding a mix-up in the composition of servo disc fragments, confirming VG.91 was sent instead of VG.90. | 3rd Jun 1939 | Box 141 \ 2 scan0290 | |
| Page 2 of a letter from Ferodo Limited regarding the indistinguishable appearance of product quality VG.90. | 7th Jun 1939 | Box 141 \ 2 scan0291 | |
| Request to issue an official free of charge order to Ferodo Ltd. for 24 servo discs due to a previous supply mistake. | 7th Jun 1939 | Box 141 \ 2 scan0292 | |
| Letter to supplier Ferodo Ltd. regarding the substitution of material VG.90 with VG.91 and ordering replacements. | 7th Jun 1939 | Box 141 \ 2 scan0293 | |
| Letter from the Experimental Dept. to Monsieur Henri Perrot regarding various Ferodo brake linings used on Bentley brakes. | 9th Jun 1939 | Box 141 \ 2 scan0294 | |
| Letter to Monsieur Henri Perrot regarding the properties and availability of Ferodo brake linings. | 9th Jun 1939 | Box 141 \ 2 scan0295 | |
| Acknowledgment of order for one Bentley Back Axle from Ferodo Limited. | 12th Jun 1939 | Box 141 \ 2 scan0296 | |
| Letter from Ferodo regarding the return of a loaned Bentley axle and the retention of brake drums for further testing. | 12th Jun 1939 | Box 141 \ 2 scan0297 | |
| Letter from Ferodo confirming delivery and replacement of VG.90 brake linings and servo discs following a meeting. | 12th Jun 1939 | Box 141 \ 2 scan0298 | |
| Letter to Ferodo Ltd. regarding an order for VG.90 Servo discs and the enclosure of consignment notes. | 13th Jun 1939 | Box 141 \ 2 scan0299 | |
| Letter to Ferodo Ltd. regarding the supply of sample crankshaft damper discs. | 14th Jun 1939 | Box 141 \ 2 scan0300 | |
| Letter from Ferodo Limited discussing the supply of brake drums, crank shaft dampers, and the manufacturing tolerances of bushes. | 15th Jun 1939 | Box 141 \ 2 scan0301 | |
| Letter to Ferodo Ltd. about VG.90 discs and brake linings. | 19th Jun 1939 | Box 141 \ 2 scan0302 | |
| Letter from Ferodo Limited regarding a delayed servo disc and an order for brake linings. | 27th Jun 1939 | Box 141 \ 2 scan0303 | |
| Letter from Ferodo Limited regarding a delivery delay for brake linings and clarification on disc markings. | 30th Jun 1939 | Box 141 \ 2 scan0304 | |
| Letter to Ferodo Ltd. regarding the manufacture of VG.100 friction discs and difficulties with spark recording methods. | 6th Jul 1939 | Box 141 \ 2 scan0305 | |
| Request to order 12 sets of VG.90 brake linings for an experimental Bentley V chassis. | 7th Jul 1939 | Box 141 \ 2 scan0306 | |
| Letter from Ferodo discussing the manufacture of brake discs, a squeak test rig, and spark marking equipment. | 7th Jul 1939 | Box 141 \ 2 scan0307 | |
| Letter to Ferodo Ltd. requesting samples of various linings for a display board. | 11th Jul 1939 | Box 141 \ 2 scan0308 | |
| Letter from Ferodo Limited acknowledging a request for 2 inch square samples for a wall display board. | 12th Jul 1939 | Box 141 \ 2 scan0309 | |
| Letter to Ferodo Ltd. discussing time recording methods and sending them ignition components. | 14th Jul 1939 | Box 141 \ 2 scan0310 | |
| Letter to Messrs. Ferodo Ltd. regarding incorrectly stencilled supplies of RU and RL linings. | 14th Jul 1939 | Box 141 \ 2 scan0311 | |
| Request to send a Delco Ignition Coil and Contact Breaker unit to Messrs. Ferodo Ltd for a test rig. | 15th Jul 1939 | Box 141 \ 2 scan0312 | |
| Letter from Ferodo Limited acknowledging receipt of advice and an ignition coil and contact breaker unit. | 17th Jul 1939 | Box 141 \ 2 scan0313 | |
| Letter from Ferodo Limited discussing spark marking on record paper and an error with RU and RL linings. | 18th Jul 1939 | Box 141 \ 2 scan0314 | |
| Letter from British Eagle Brake Linings Ltd. seeking a meeting to introduce their friction linings. | 19th Jul 1939 | Box 141 \ 2 scan0315 | |
| Letter to Ferodo Ltd. concerning a previous supply order error and expressing worry about future mistakes. | 20th Jul 1939 | Box 141 \ 2 scan0316 | |
| Letter to British Eagle Brake Linings Ltd. declining to test new brake linings. | 21th Jul 1939 | Box 141 \ 2 scan0317 | |
| Letter from Ferodo Limited regarding the supply of RL and RU materials against order No. 75831. | 21th Jul 1939 | Box 141 \ 2 scan0318 | |
| Letter from British Eagle Brake Linings Ltd. thanking for a previous letter and hoping to present their materials. | 22th Jul 1939 | Box 141 \ 2 scan0319 | |
| Comparing brake and lining wear on three different car models fitted with hydraulic front and Girling rear systems. | 23th Jan 1940 | Box 141 \ 2 scan0320 | |
| Analysis of brake wear proportions on a 12.B.V. model with hydraulic front and Girling rear brakes. | 23th Jan 1940 | Box 141 \ 2 scan0321 | |
| The testing, adjustment, and wear of the braking system on car 11.B.V. | 23th Jan 1940 | Box 141 \ 2 scan0322 | |
| Brake wear inspection, noting unequal wear between front and rear brakes and subsequent checks. | 23th Jan 1940 | Box 141 \ 2 scan0323 | |
| Report analyzing brake wear tests on a car with hydraulic front and Girling rear brakes. | 23th Jan 1940 | Box 141 \ 2 scan0324 | |
| Request to issue an official order to Ferodo Ltd. for two sets of brake linings. | 26th Jan 1940 | Box 141 \ 2 scan0325 | |
| Request to issue an official order to Ferodo Ltd. for servo motor linings and rivets. | 31th Jan 1940 | Box 141 \ 2 scan0326 | |
| Official order for servo motor linings from Ferodo Ltd. | 12th Feb 1940 | Box 141 \ 2 scan0327 | |
| Request to issue an official order to Ferodo Ltd. for two sets of brake linings. | 12th Feb 1940 | Box 141 \ 2 scan0328 | |
| Request to issue an official order to Messrs. Ferrodo Ltd. for servo motor linings. | 12th Feb 1940 | Box 141 \ 2 scan0329 | |
| Letter from Automotive Products Company Ltd. regarding the adjustment range for brake linings and the status of wheel cylinder unit drawings. | 28th May 1940 | Box 141 \ 2 scan0330 | |
| Rig testing at Ferodo's and the status of the associated work. | 20th Aug 1940 | Box 141 \ 2 scan0331 | |
| Letter to Vauxhall Motors asking questions about brake liner wear and brake shoe temperature. | 30th Aug 1940 | Box 141 \ 2 scan0332 | |
| The investigation into abnormal wear of rear brake linings and the effect of cooling systems on various car models. | 10th Sep 1940 | Box 141 \ 2 scan0333 | |
| Tests on brake temperature, cooling efficiency, and the effects of different wheel types. | 10th Sep 1940 | Box 141 \ 2 scan0334 | |
| Analysis of brake efficiency changes, tests on a Buick Century 8, and conclusions on front/rear braking ratios and overheating. | 10th Sep 1940 | Box 141 \ 2 scan0335 | |
| Recommendations for improving cooling to reduce wear, based on temperature analysis. | 10th Sep 1940 | Box 141 \ 2 scan0336 | |
| Critical review of a test report on brake wear, outlining requirements for future reports. | 13th Sep 1940 | Box 141 \ 2 scan0337 | |
| Instructions on the content required for a report, specifically demanding more data and curves. | 13th Sep 1940 | Box 141 \ 2 scan0338 | |
| Letter to Ferodos Ltd. inquiring about the effects of temperature on brake lining wear. | 16th Sep 1940 | Box 141 \ 2 scan0339 | |
| Letter to Ferodo Ltd. discussing brake lining fading, squeaking at 300°C, and requesting further data. | 4th Nov 1940 | Box 141 \ 2 scan0340 | |
| The position of the rationalised brake system, detailing issues and proposed experiments. | 4th Nov 1940 | Box 141 \ 2 scan0341 | |
| Analysis of gearbox modifications, oil ingress issues, servo drive improvements, and high brake lining wear. | 4th Nov 1940 | Box 141 \ 2 scan0342 | |
| List of suggested experiments concerning vehicle braking systems, including efficiency curves, cooling tests, clearances, handbrakes, and rear equalisers. | 4th Nov 1940 | Box 141 \ 2 scan0343 | |
| Plating methods for cast iron liners in aluminium brake drums. | 5th Jan 1941 | Box 141 \ 2 scan0344 | |
| Visit to Ferodos to discuss brake linings, focusing on high-temperature performance and squeak. | 8th Jan 1941 | Box 141 \ 2 scan0345 | |
| Letter to Messrs. Ferodo Ltd. confirming the arrival of VG.91 brake linings. | 7th Feb 1941 | Box 141 \ 2 scan0346 | |
| Letter to New Hudsons Ltd. concerning the despatch of brake shoes and linings for fitting. | 20th Feb 1941 | Box 141 \ 2 scan0347 | |
| Letter to Messrs. New Hudson's Ltd. regarding the despatch of linings and shoes. | 27th Feb 1941 | Box 141 \ 2 scan0348 | |
| Letter to Ferodo Ltd. requesting the manufacture of 8 brake shoe linings to a specific drawing and material. | 8th Mar 1941 | Box 141 \ 2 scan0349 | |
| Design and weight-saving specifications for combined aluminium hubs and drums for B.V. | 19th Apr 1941 | Box 141 \ 2 scan0350 | |
| Blueprint of a modified Kelsey Hayes rig for testing a front hub and drum. | 19th Apr 1941 | Box 141 \ 2 scan0351 | |
| Blueprint drawing of a combined hub and drum in aluminium. | 3rd May 1941 | Box 141 \ 2 scan0352 | |
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