| Description | Date | Identifier | |
| Modifications to the flexible rear engine mounting for 20/25 and Bentley models. | 11th Jul 1934 | Box 104 \ 1 scan0164 | |
| Twisted rear cross member on a car and proposed static deflection tests. | 17th Jul 1934 | Box 104 \ 1 scan0165 | |
| Ordering new material for rubber engine mountings for the 20/25 HP chassis. | 24th Jul 1934 | Box 104 \ 1 scan0166 | |
| Modification for rubber engine mountings on the 20/25 & Phantom models. | 25th Jul 1934 | Box 104 \ 1 scan0167 | |
| Modification to the flexible engine mounting for the 20/25 HP model. | 25th Jul 1934 | Box 104 \ 1 scan0168 | |
| Modifications for the 20/25 HP flexible engine mounting, concerning the tie rod washer and ball end bushes. | 27th Jul 1934 | Box 104 \ 1 scan0169 | |
| Production specification document for the 25 HP flexible engine mounting on the F.2 Series chassis. | 28th Jul 1934 | Box 104 \ 1 scan0170 | |
| Modification to a Tie Rod Ball End, instructing the use of a thicker lock plate. | 28th Jul 1934 | Box 104 \ 1 scan0171 | |
| Protective cover for the 20/25 HP flexible rear engine mounting. | 28th Jul 1934 | Box 104 \ 1 scan0172 | |
| Letter from The Leyland & Birmingham Rubber Co. Ltd. regarding a delayed order for rubber blocks and increased costs. | 30th Jul 1934 | Box 104 \ 1 scan0173 | |
| Continuation of a letter to Motor Sales regarding the production and despatch of hand-made rubber articles. | 30th Jul 1934 | Box 104 \ 1 scan0174 | |
| Commenting on the production specification for a 25 HP flexible engine mounting. | 31th Jul 1934 | Box 104 \ 1 scan0175 | |
| Incorporation of modifications for the propeller shaft, gearbox, and slipper flywheel. | 31th Jul 1934 | Box 104 \ 1 scan0176 | |
| Letter to Leyland & Birmingham Rubber Co. Ltd. arranging a follow-up visit to discuss new difficulties and deliver steel inserts. | 2nd Aug 1934 | Box 104 \ 1 scan0177 | |
| Letter to The British Goodrich Rubber Co. Ltd. arranging a meeting to discuss engine mounting rubbers. | 2nd Aug 1934 | Box 104 \ 1 scan0178 | |
| Request to make 6 sets of engine rubbers for the 21-G-IV model for production use. | 2nd Aug 1934 | Box 104 \ 1 scan0179 | |
| Drawing for covers to protect the 25-HP engine suspension rubbers from oil. | 2nd Aug 1934 | Box 104 \ 1 scan0180 | |
| Deflection and potential stiffening of a cross member for a 20/25 HP rubber engine mounting. | 3rd Aug 1934 | Box 104 \ 1 scan0181 | |
| Test report on the deflection of a Bentley 25 HP engine suspension gearbox cross member. | 1st Aug 1934 | Box 104 \ 1 scan0182 | |
| Tabular comparison of deflection measurements for a standard versus a strengthened cross member under increasing loads. | 1st Aug 1934 | Box 104 \ 1 scan0183 | |
| Letter to a supplier regarding an order for various rubber components and moulds. | 8th Aug 1934 | Box 104 \ 1 scan0184 | |
| Letter detailing the production requirements and schedule for various rubber components and steel inserts. | 8th Aug 1934 | Box 104 \ 1 scan0185 | |
| The conclusion of a letter discussing plating an insert to prevent rust and the satisfactory performance of rubbers. | 8th Aug 1934 | Box 104 \ 1 scan0186 | |
| The supply and design modification of engine mounting rubbers with steel inserts. | 8th Aug 1934 | Box 104 \ 1 scan0187 | |
| Letter from a rubber supplier regarding production difficulties and proposed solutions for rubber part F.86411. | 9th Aug 1934 | Box 104 \ 1 scan0188 | |
| Letter from British Tyre & Rubber Co. Ltd. discussing orders, mould modifications, and specifications for various rubber parts. | 9th Aug 1934 | Box 104 \ 1 scan0189 | |
| Continuation page of a letter from British Tyre and Rubber Co. Ltd. acknowledging instructions. | 10th Aug 1934 | Box 104 \ 1 scan0190 | |
| Letter to a supplier regarding replacement prints, moulds, and a request for a harder grade of rubber. | 10th Aug 1934 | Box 104 \ 1 scan0191 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding the supply of steel inserts for producing rubbers of specific durometer hardness. | 10th Aug 1934 | Box 104 \ 1 scan0192 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding the use of location pegs and inserts. | 28th Aug 1934 | Box 104 \ 1 scan0193 | |
| Letter to a supplier regarding the urgent production and despatch of rubber components and steel inserts. | 28th Aug 1934 | Box 104 \ 1 scan0194 | |
| Despatch note requesting rings and washers to be sent to The British Tyre & Rubber Co. Ltd. | 28th Aug 1934 | Box 104 \ 1 scan0195 | |
| Letter from British Tyre & Rubber Co. Ltd. regarding the supply and delivery of various steel inserts. | 29th Aug 1934 | Box 104 \ 1 scan0196 | |
| Letter from Leyland & Birmingham Rubber Co. confirming they are proceeding with alterations to a mold for Part No.86411. | 30th Aug 1934 | Box 104 \ 1 scan0197 | |
| 20/25 HP rear engine mounting and sheet metal restraining cups for rubber blocks. | 30th Aug 1934 | Box 104 \ 1 scan0198 | |
| Requesting the production of updated rubber engine mounting parts for car 21-G-IV. | 31th Aug 1934 | Box 104 \ 1 scan0199 | |
| Letter to The British Tyre & Rubber Co.Ltd. regarding the quality and testing of rubber batches F.60398 and F.60399. | 1st Sep 1934 | Box 104 \ 1 scan0200 | |
| Modification of the 20/25 HP flexible engine mounting drawing. | 6th Sep 1934 | Box 104 \ 1 scan0201 | |
| Decision to supply steel inserts for engine mounting rubbers following a discussion with a supplier. | 6th Sep 1934 | Box 104 \ 1 scan0202 | |
| Urgent request for support plates for the 20/25 Chassis rubber engine mounting. | 8th Sep 1934 | Box 104 \ 1 scan0203 | |
| Letter to The British Tyre & Rubber Co. Ltd. regarding the production and cost of new rubber moulds and parts. | 8th Sep 1934 | Box 104 \ 1 scan0204 | |
| Failure of a suction pipe on a 25-HP flexible engine mounting and a proposed modification. | 10th Sep 1934 | Box 104 \ 1 scan0205 | |
| Request to despatch steel plates to the British Tyre & Rubber Co. Ltd for the attention of Mr. Evans. | 13th Sep 1934 | Box 104 \ 1 scan0206 | |
| Confirming the continuation of tests on the 20/25 HP engine mounting. | 17th Sep 1934 | Box 104 \ 1 scan0207 | |
| Vibration issue with the air silencer on 25-HP models with rubber engine mountings, proposing a new triangular bracket. | 17th Sep 1934 | Box 104 \ 1 scan0208 | |
| Modifications to the tie rod pins for the 25-HP flexible engine mounting. | 19th Sep 1934 | Box 104 \ 1 scan0209 | |
| Requesting a modification to the 21-G-IV engine mounting to address wearing pins on the front links. | 20th Sep 1934 | Box 104 \ 1 scan0210 | |
| Instruction to build and fit a strengthened bracket for an air silencer on 25 HP cars. | 20th Sep 1934 | Box 104 \ 1 scan0211 | |
| Request to build 3 modified suction pipes for testing due to previous breakages on 25 HP flexible engine mountings. | 20th Sep 1934 | Box 104 \ 1 scan0212 | |
| Letter to The British Tyre & Rubber Co. Ltd. concerning modifications and hardness specifications for rubber components. | 21th Sep 1934 | Box 104 \ 1 scan0213 | |
| Request for a covering order for rubber parts from the British Tyre & Rubber Co. | 21th Sep 1934 | Box 104 \ 1 scan0214 | |
| The testing of a new flexible rubber engine mounting for the 20/25 HP chassis. | 22th Sep 1934 | Box 104 \ 1 scan0215 | |
| Instructions for fitting a flexible engine mounting and other modifications to a 20/25 HP car. | 27th Sep 1934 | Box 104 \ 1 scan0216 | |
| Letter to The British Tyre & Rubber Co.Ltd. concerning test results for rubbers F.60398 and F.60517. | 27th Sep 1934 | Box 104 \ 1 scan0217 | |
| Contents note for the dispatch of 3 samples of part number Pt.F. 60517. | 25th Sep 1934 | Box 104 \ 1 scan0218 | |
| Rubber quality for a flexible suction pipe on a 20/25 HP engine. | 3rd Oct 1934 | Box 104 \ 1 scan0219 | |
| Despatch request for a Bottom Front Engine Rubber part to be sent to Mr. Evans of the British Tyre & Rubber Co. Ltd. | 3rd Oct 1934 | Box 104 \ 1 scan0220 | |
| Modifications and hardness specifications for 25 HP engine mounting rubbers. | 3rd Oct 1934 | Box 104 \ 1 scan0221 | |
| Overlooked electrical earthing for the 20/25 HP flexible engine mounting. | 4th Oct 1934 | Box 104 \ 1 scan0222 | |
| Testing and replacing a flexible suction pipe scheme for a 25 HP flexible engine mounting. | 5th Oct 1934 | Box 104 \ 1 scan0223 | |
| Flexible engine mounting tests on the 20/25 and Bentley models. | 10th Oct 1934 | Box 104 \ 1 scan0224 | |
| Series of tests on flexible engine mountings to investigate and resolve issues with clutch jagger and engine smoothness. | 10th Oct 1934 | Box 104 \ 1 scan0225 | |
| Tests to cure clutch jagger and engine shimmy, involving the removal of a diagonal stay and the fitting of dampers and buffers. | 10th Oct 1934 | Box 104 \ 1 scan0226 | |
| Letter to The British Tyre & Rubber Co. regarding a chassis paint sample to test its effect on rubbers. | 11th Oct 1934 | Box 104 \ 1 scan0227 | |
| Flexible engine mounting movement measurements taken during hard braking conditions. | 11th Oct 1934 | Box 104 \ 1 scan0228 | |
| Request to despatch two test tubes of chassis paint to the British Tyre & Rubber Co. Ltd. | 11th Oct 1934 | Box 104 \ 1 scan0229 | |
| Letter to a supplier detailing inspection results and dimensional issues with supplied rubber parts. | 12th Oct 1934 | Box 104 \ 1 scan0230 | |
| Letter suggesting mould alterations to overcome a dimensions error which is not considered vital. | 12th Oct 1934 | Box 104 \ 1 scan0231 | |
| Letter from a supplier regarding the testing of quick-drying chassis paint on a rubber assembly. | 13th Oct 1934 | Box 104 \ 1 scan0232 | |
| Letter to The British Tyre & Rubber Co. Ltd. regarding the satisfactory external finish of 6 rubber samples and a request to have them painted. | 15th Oct 1934 | Box 104 \ 1 scan0233 | |
| Production instructions for a change to the flexible engine mounting system and clutch pedal shaft link. | 15th Oct 1934 | Box 104 \ 1 scan0234 | |
| Letter from British Tyre & Rubber Co. Ltd. regarding adjustments to moulds for rubber to metal assemblies. | 15th Oct 1934 | Box 104 \ 1 scan0235 | |
| Letter to The British Tyre & Rubber Co. Ltd. regarding the supply of rubbers and alterations to moulds. | 16th Oct 1934 | Box 104 \ 1 scan0236 | |
| Letter from a supplier proposing a painted finish on a metal assembly (pt.no.F.60399) to prevent rusting. | 19th Oct 1934 | Box 104 \ 1 scan0237 | |
| Letter to The British Tyre & Rubber Co. Ltd. regarding the painting of sample rubbers. | 23th Oct 1934 | Box 104 \ 1 scan0238 | |
| Standardisation of a rubber mounting for an engine unit, including cantilever pedals. | 7th Sep 1934 | Box 104 \ 1 scan0239 | |
| Cost estimation for extra jigs, tools, equipment and potential scrap for a chassis modification. | 28th Sep 1934 | Box 104 \ 1 scan0240 | |
| Letter requesting the production of rubber components for testing. | 14th Nov 1934 | Box 104 \ 1 scan0241 | |
| Despatch note detailing steel inserts to be sent to The British Tyre & Rubber Co. Ltd. | 14th Nov 1934 | Box 104 \ 1 scan0242 | |
| Letter to The British Tyre & Rubber Co. Ltd. regarding prints for part numbers F.86410 and F.86436. | 15th Nov 1934 | Box 104 \ 1 scan0243 | |
| Letter to The British Tyre & Rubber Co. Ltd. requesting the urgent production of experimental rubber buffers. | 22th Nov 1934 | Box 104 \ 1 scan0244 | |
| Suspension and re-ordering of engine mounting rubbers for 20/25-HP and Bentley chassis. | 11th Dec 1934 | Box 104 \ 1 scan0245 | |
| Outstanding issues with the engine rubber mounting on the 25 HP Series 'F' chassis. | 15th Dec 1934 | Box 104 \ 1 scan0246 | |
| Technical memorandum discussing issues with 20/25 rubber engine mountings and a proposed friction damper solution. | 17th Dec 1934 | Box 104 \ 1 scan0247 | |
| Proposing experiments on light damping and friction for the Wraith and Spectre models. | 17th Dec 1934 | Box 104 \ 1 scan0248 | |
| Standardisation of a light friction load damper for the 20/25 rubber engine mounting. | 18th Dec 1934 | Box 104 \ 1 scan0249 | |
| Note regarding engine mounting rubbers for the 20/25-HP and Bentley chassis. | 21th Dec 1934 | Box 104 \ 1 scan0250 | |
| Invoice from the British Tyre & Rubber Co. Ltd. for rubber parts, seeking payment authorization. | 27th Dec 1934 | Box 104 \ 1 scan0251 | |
| Fitting of a light friction damper as part of the rubber engine mounting system for the 20/25 HP chassis. | 1st Jan 1935 | Box 104 \ 1 scan0252 | |
| Confirming receipt of rubbers and requesting a covering order be issued. | 3rd Jan 1935 | Box 104 \ 1 scan0253 | |
| The specification for ordering engine rubbers for the 20/25 HP & Bentley engine mounting. | 3rd Jan 1935 | Box 104 \ 1 scan0254 | |
| The fitting of a light friction damper to a 20/25 HP chassis in preparation for a visit. | 8th Jan 1935 | Box 104 \ 1 scan0255 | |
| Rubber engine mounting light friction damper for a 20/25 HP chassis. | 8th Jan 1935 | Box 104 \ 1 scan0256 | |
| Confirming receipt of rubber pads and explaining an ordering delay caused by experimental department testing. | 18th Jan 1935 | Box 104 \ 1 scan0257 | |
| Instructions requested for an experimental set of lighter 20/25 HP chassis torque reaction damper arms. | 17th Jan 1935 | Box 104 \ 1 scan0258 | |
| Instructions for an experiment on a 20/25 HP Chassis Torque Reaction Damper, detailing replacement parts. | 25th Jan 1935 | Box 104 \ 1 scan0259 | |
| Request for three sets of new lightened torque reaction dampers for 20/25 HP cars. | 25th Jan 1935 | Box 104 \ 1 scan0260 | |
| Lightening and modification of 25 HP Torque Reaction Dampers. | 6th Mar 1935 | Box 104 \ 1 scan0261 | |
| Implementing 20/25 Torque Reaction Dampers to reduce uneven engine torque at idle. | 22th Mar 1935 | Box 104 \ 1 scan0262 | |
| Design, material, testing, and production of 20/25 Torque Reaction Dampers. | 26th Mar 1935 | Box 104 \ 1 scan0263 | |
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