| Description | Date | Identifier | |
| Letter to New-Hudson Ltd. regarding the supply of experimental rear brake assemblies for two different models. | 24th Aug 1937 | Box 140 \ 4 scan0048 | |
| Urgent internal memo to order Ferodo brake linings. | 7th Sep 1937 | Box 140 \ 4 scan0049 | |
| Urgent order for 'HALO' brake linings. | 7th Sep 1937 | Box 140 \ 4 scan0050 | |
| Order for 'HALO' brake linings from the British Belting & Asbestos Co. | 8th Sep 1937 | Box 140 \ 4 scan0051 | |
| Letter from British Belting & Asbestos Ltd. regarding a trial of 'Halo 3.L' material for Phantom III Servo Motor Liners. | 13th Sep 1937 | Box 140 \ 4 scan0052 | |
| Letter to supplier Ferodo Ltd. regarding the supply and testing of brake lining materials. | 28th Sep 1937 | Box 140 \ 4 scan0053 | |
| Covering order for Ferodo brake lining parts. | 28th Sep 1937 | Box 140 \ 4 scan0054 | |
| Letter to Messrs. Ferodo Ltd. requesting a delivery date for order No. 47995. | 30th Sep 1937 | Box 140 \ 4 scan0055 | |
| Letter from Ferodo Limited regarding the dispatch of Order No. 47998. | 1st Oct 1937 | Box 140 \ 4 scan0056 | |
| Letter from supplier Ferodo regarding brake part production, material wear, and an unresolved squeal problem. | 2nd Oct 1937 | Box 140 \ 4 scan0057 | |
| Letter to British Belting & Asbestos Ltd. regarding a high-pitched squeak from lining samples and suggesting a solution. | 2nd Oct 1937 | Box 140 \ 4 scan0058 | |
| Letter to a brake lining supplier hypothesizing that brake squeak is caused by surface glazing and requesting a solution. | 4th Oct 1937 | Box 140 \ 4 scan0059 | |
| Letter from British Belting & Asbestos Ltd. regarding the performance of high lead content Halo 3 brake linings. | 4th Oct 1937 | Box 140 \ 4 scan0060 | |
| Letter to Ferodo Ltd. requesting various sizes of R.U. brake lining material for testing purposes. | 5th Oct 1937 | Box 140 \ 4 scan0061 | |
| Request to order various quantities of Ferodo brake linings and chase a previous order. | 6th Oct 1937 | Box 140 \ 4 scan0062 | |
| Invoice from Ferodo Ltd. for liners, requesting authorisation for payment. | 6th Oct 1937 | Box 140 \ 4 scan0063 | |
| Letter from Ferodo Limited regarding the manufacturing progress of 3/8' and 5/16' material. | 7th Oct 1937 | Box 140 \ 4 scan0064 | |
| Letter from British Belting & Asbestos Ltd. regarding modifications to high lead content brake linings. | 7th Oct 1937 | Box 140 \ 4 scan0065 | |
| Covering order for Ferodo liners with pricing. | 8th Oct 1937 | Box 140 \ 4 scan0066 | |
| Letter from Thermoid Company regarding a delay and quality issues with brake lining samples. | 8th Oct 1937 | Box 140 \ 4 scan0067 | |
| Quotation from Thermoid for manufacturing drilled parts, including pricing, equipment costs, and minimum order quantities. | 8th Oct 1937 | Box 140 \ 4 scan0068 | |
| Letter confirming the completion of six servo motor linings and requesting the corresponding official order. | 8th Oct 1937 | Box 140 \ 4 scan0069 | |
| Requesting an order for Ferodo brake linings. | 11th Oct 1937 | Box 140 \ 4 scan0070 | |
| The supply and fitting of Bentley brake linings for complaint cases. | 14th Oct 1937 | Box 140 \ 4 scan0071 | |
| Letter to supplier Ferodo Ltd. regarding changing from F.Z. to M.L. brake linings for the Phantom III model. | 18th Oct 1937 | Box 140 \ 4 scan0072 | |
| Letter from Gandy's Brake Lining regarding a patent brake model and two sets of graphited 'Safeguard 400' liners for testing. | 28th Oct 1937 | Box 140 \ 4 scan0073 | |
| Instruction to return unsatisfactory Halo brake linings to the supplier for examination. | 28th Oct 1937 | Box 140 \ 4 scan0074 | |
| Letter to British Belting & Asbestos Ltd. regarding rig test results for Halo 3L and Halo 5L materials, noting squeaking issues. | 28th Oct 1937 | Box 140 \ 4 scan0075 | |
| Letter to Messrs. Ferodo Ltd. confirming a visit to discuss American belts. | 5th Nov 1937 | Box 140 \ 4 scan0076 | |
| Letter to The British Belting & Asbestos Ltd. regarding a meeting to discuss brake linings. | 8th Nov 1937 | Box 140 \ 4 scan0077 | |
| Letter to Ferodo Ltd. detailing the results of testing their R.U. brake linings and comparing them to American equivalents. | 11th Nov 1937 | Box 140 \ 4 scan0078 | |
| Instructing the use of Ferodo BZ brake linings on the first Wraith models. | 12th Nov 1937 | Box 140 \ 4 scan0079 | |
| Letter from Ferodo discussing brake lining squeaks and offering to analyze a satisfactory American lining. | 13th Nov 1937 | Box 140 \ 4 scan0080 | |
| Letter to Messrs. Ferodo Ltd. regarding the testing of Thermoid brake liners and issues with squeaking. | 15th Nov 1937 | Box 140 \ 4 scan0081 | |
| Page 2 of a letter regarding the decision to proceed with American made linings due to cost and testing time constraints. | 15th Nov 1937 | Box 140 \ 4 scan0082 | |
| Brake squeak issues on the Wraith model and a proposal to test new American 'Thermoid' brake linings. | 15th Nov 1937 | Box 140 \ 4 scan0083 | |
| Letter to Thermoid Co. Ltd. regarding the testing and ordering of lining material. | 17th Nov 1937 | Box 140 \ 4 scan0084 | |
| Standardisation of Phantom III brake friction linings made of Ferodo M.L. to increase braking power and reduce squeaking. | 4th Oct 1937 | Box 140 \ 4 scan0085 | |
| The standardisation of parts for the Phantom III, specifically the cost and production implementation. | 1st Oct 1933 | Box 140 \ 4 scan0086 | |
| Request to order three pairs of 'Halo' servo linings from the British Belting and Asbestos Co. | 18th Nov 1937 | Box 140 \ 4 scan0087 | |
| Ordering of brake linings for the Wraith model. | 19th Nov 1937 | Box 140 \ 4 scan0088 | |
| Request to order three sets of Wraith brake linings in Ferodo B.Z. quality. | 19th Nov 1937 | Box 140 \ 4 scan0089 | |
| Letter from Gandy's Brake Lining confirming the dispatch of a special set of graphited Safeguard liners. | 25th Nov 1937 | Box 140 \ 4 scan0090 | |
| Letter from Thermoid Company regarding molded brake lining samples, test results, and future orders. | 26th Nov 1937 | Box 140 \ 4 scan0091 | |
| Letter from a supplier, British Belting & Asbestos Ltd, arranging a visit to discuss seven matters. | 30th Nov 1937 | Box 140 \ 4 scan0092 | |
| Follow-up letter concerning motor brake linings sent to the Experimental Department. | 1st Dec 1937 | Box 140 \ 4 scan0093 | |
| Letter to The British Belting & Asbestos Ltd. regarding an order for Halo 3L servo lining discs for a Bentley brake system. | 3rd Dec 1937 | Box 140 \ 4 scan0094 | |
| Letter to Ferodo Ltd. suggesting a meeting to discuss using their materials over American competitors. | 4th Dec 1937 | Box 140 \ 4 scan0095 | |
| Requesting a covering order for Halo servo linings for a Bentley. | 4th Dec 1937 | Box 140 \ 4 scan0096 | |
| Letter from Ferodo Limited arranging a meeting to discuss requirements. | 6th Dec 1937 | Box 140 \ 4 scan0097 | |
| Letter to The Gandy Belt Mfg. Co. Ltd. regarding the fitting and testing of graphited linings on a Bentley. | 9th Dec 1937 | Box 140 \ 4 scan0098 | |
| Letter to a supplier regarding the development and testing of motor brake linings. | 9th Dec 1937 | Box 140 \ 4 scan0099 | |
| Letter to Ferodo Ltd. regarding the supply and testing of brake lining materials. | 10th Dec 1937 | Box 140 \ 4 scan0100 | |
| Letter from Ferodo Limited concerning the reproduction of a material sample named Thermoid D.35.IH and postponing an official order. | 13th Dec 1937 | Box 140 \ 4 scan0101 | |
| Letter from Hubert HP Trist & Company regarding the supply and types of motor brake linings. | 14th Dec 1937 | Box 140 \ 4 scan0102 | |
| Letter to Hubert HP Trist & Co. regarding samples of a new asbestos-resin-artificial rubber motor brake lining. | 15th Dec 1937 | Box 140 \ 4 scan0103 | |
| Procurement strategy and ordering of Thermoid brake linings for Bentley and Wraith models. | 15th Dec 1937 | Box 140 \ 4 scan0104 | |
| Letter to The Gandy Belty Manufacturing Co., Ltd. confirming arrangements for testing material samples and discussing linings. | 16th Dec 1937 | Box 140 \ 4 scan0105 | |
| Letter to The Gandy Belt Manufacturing Co. Ltd. regarding the use of American linings and enclosed test results. | 16th Dec 1937 | Box 140 \ 4 scan0106 | |
| Follow-up note waiting for a reply to a letter concerning Halo 2L discs. | 17th Dec 1937 | Box 140 \ 4 scan0107 | |
| Letter from a supplier confirming the dispatch of correct Halo III L discs and advising that the incorrect ones can be destroyed. | 18th Dec 1937 | Box 140 \ 4 scan0108 | |
| Post Office Telegram confirming an order for servo linings and their arrival information. | 20th Dec 1937 | Box 140 \ 4 scan0109 | |
| Letter from Gandy Brake Lining discussing Safeguard 'D' and '400' brake lining materials and correcting a previous statement. | 20th Dec 1937 | Box 140 \ 4 scan0110 | |
| Letter from Gandy's regarding the submission of 'Safeguard' brake lining samples for testing and cooperation on brake squeaking issues. | 20th Dec 1937 | Box 140 \ 4 scan0111 | |
| Requesting an order for Ferodo brake linings. | 1st Dec 1937 | Box 140 \ 4 scan0112 | |
| Letter to Ferodo Ltd. requesting a supply of lining material after successful testing. | 21th Dec 1937 | Box 140 \ 4 scan0113 | |
| Letter from Hubert HP Trist & Company regarding the names of motor brake linings with artificial rubber. | 21th Dec 1937 | Box 140 \ 4 scan0114 | |
| Order for Ferodo brake linings. | 22th Dec 1937 | Box 140 \ 4 scan0115 | |
| Procedure for relining brakes on all cars to prevent seizure from new linings swelling when heated. | 29th Dec 1937 | Box 140 \ 4 scan0116 | |
| Letter to a supplier regarding the testing and performance of brake lining materials. | 29th Dec 1937 | Box 140 \ 4 scan0117 | |
| Letter concerning the erroneous shipment of 'Halo' 2L Discs and an offer to supply 24 G.56065 rings as a replacement. | 30th Dec 1937 | Box 140 \ 4 scan0118 | |
| Letter to Messrs. Ferodo Ltd. requesting a delivery date for an outstanding order. | 1st Jan 1938 | Box 140 \ 4 scan0119 | |
| Letter rescheduling an appointment due to the failure of an experimental gearbox during testing. | 1st Jan 1937 | Box 140 \ 4 scan0120 | |
| Letter from Ferodo Limited confirming the dispatch date of materials for order number 54349. | 3rd Jan 1938 | Box 140 \ 4 scan0121 | |
| Letter detailing the results of tests on 'Safeguard' brake lining material. | 3rd Jan 1938 | Box 140 \ 4 scan0122 | |
| Letter to The Gandy Belt Mnfg. Co. Ltd. discussing test results for a lining containing non-drying oil. | 3rd Jan 1938 | Box 140 \ 4 scan0123 | |
| Letter from Hubert HP Trist & Co. arranging a meeting for the 10th of January. | 4th Jan 1938 | Box 140 \ 4 scan0124 | |
| Letter from Gandy's Brake Lining discussing test results and issues with their friction materials. | 5th Jan 1938 | Box 140 \ 4 scan0125 | |
| Letter discussing issues and potential solutions for brake squeak and wear with Gandy's 'Safeguard' brake lining. | 5th Jan 1938 | Box 140 \ 4 scan0126 | |
| Letter from Gandy's regarding the continued discussion of 'Safeguard' brake lining. | 5th Jan 1938 | Box 140 \ 4 scan0127 | |
| Letter to Hubert HP Trist & Co. regarding the supply and testing of brake linings for a 4 1/4 litre Bentley. | 6th Jan 1938 | Box 140 \ 4 scan0128 | |
| Page two of a letter confirming a cancelled trip to Bristol following a discussion with Mr. Draper. | 6th Jan 1938 | Box 140 \ 4 scan0129 | |
| Letter clarifying the brake equalizer system and the procedure used to diagnose unequal brake lining wear. | 6th Jan 1938 | Box 140 \ 4 scan0130 | |
| Rear brake squeaks and 'wet judder', proposing a test with extra graphite lining. | 8th Jan 1938 | Box 140 \ 4 scan0131 | |
| Order for Ferodo brake linings. | 8th Jan 1938 | Box 140 \ 4 scan0132 | |
| Letter from a supplier discussing brake lining swelling issues and a proposed solution. | 8th Jan 1938 | Box 140 \ 4 scan0133 | |
| Letter from Gandy's expressing appreciation for the trial of their 'Safeguard' brake linings. | 8th Jan 1938 | Box 140 \ 4 scan0134 | |
| Letter from Ferodo Limited regarding the reproduction and despatch of brake or clutch materials. | 17th Jan 1938 | Box 140 \ 4 scan0135 | |
| Letter to Ferodo Ltd. regarding brake lining materials and research into brake squeak. | 18th Jan 1938 | Box 140 \ 4 scan0136 | |
| Letter to Morgan Crucible Co. Ltd. enquiring about the supply of graphite blocks for brake linings and an alternative carbon material. | 19th Jan 1938 | Box 140 \ 4 scan0137 | |
| Letter from Hubert HP Trist & Company regarding the dispatch and ordering of brake liners. | 19th Jan 1938 | Box 140 \ 4 scan0138 | |
| Quotation from Hubert HP Trist & Company for various types of brake and clutch linings. | 19th Jan 1938 | Box 140 \ 4 scan0139 | |
| Quotation from Hubert HP Trist & Company for 'Top Dog' brake and clutch linings. | 19th Jan 1938 | Box 140 \ 4 scan0140 | |
| Letter to Ferodo Ltd. explaining an analysis of three types of brake vibration. | 20th Jan 1938 | Box 140 \ 4 scan0141 | |
| Analysis of brake judder and squeak, relating friction, pressure, and oscillation, with proposed solutions. | 20th Jan 1938 | Box 140 \ 4 scan0142 | |
| Letter to Ferodo Ltd. concerning the performance characteristics of brake linings in relation to squeaking and juddering issues. | 20th Jan 1938 | Box 140 \ 4 scan0143 | |
| Order of 'Top Dog' brake linings from Hubert HP Trist & Co. for testing purposes. | 21th Jan 1938 | Box 140 \ 4 scan0144 | |
| Letter from The Morgan Crucible Company regarding the supply and pricing of graphite blocks for brake shoes and thrust blocks. | 21th Jan 1938 | Box 140 \ 4 scan0145 | |
| Letter to Ferodo Ltd. explaining why their brake linings will not be fitted to the Wraith model. | 22th Dec 1938 | Box 140 \ 4 scan0146 | |
| Page 2 of a letter to Ferodo Ltd. regarding the testing of linings for the Wraith model. | 22th Dec 1938 | Box 140 \ 4 scan0147 | |
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