| Description | Date | Identifier | |
| Page describing the advantages of a silencer in preventing back-firing, especially for aeroplanes. | 1st Apr 1934 | Box 152 \ 3 scan0160 | |
| The patented design and performance benefits of the St. Jacques Silencer. | 4th May 1934 | Box 152 \ 3 scan0161 | |
| Change to the exhaust nozzle on 20/25 and 40/50 HP chassis. | 4th May 1934 | Box 152 \ 3 scan0162 | |
| Car preparations, including sourcing Aerolite pistons, clarifying fuel regulations for the Ulster Race, and obtaining Burgess silencer material. | 13th Jul 1934 | Box 152 \ 3 scan0163 | |
| Possibility of licensing a tuned silencer to the MG Car Co. Ltd. | 1st Apr 1935 | Box 152 \ 3 scan0164 | |
| Letter from C.G. Vokes Limited listing goods held on consignment for stocktaking purposes. | 8th Apr 1935 | Box 152 \ 3 scan0165 | |
| Letter from C.G. Vokes Ltd chasing a response regarding goods on a 'Sale or Return' basis. | 18th May 1935 | Box 152 \ 3 scan0166 | |
| Requesting to re-order parts from Messrs. Vokes, as the previous batch was scrapped after testing. | 31th May 1935 | Box 152 \ 3 scan0167 | |
| Invoice from Messrs. C.G. Vokes Ltd. for £22.0.0, seeking payment instructions. | 13th Jul 1935 | Box 152 \ 3 scan0168 | |
| Short memo confirming the decision to pay for parts. | 15th Jul 1935 | Box 152 \ 3 scan0169 | |
| Letter concerning a new silencer and gas turbine invention by Professor Pio-Oulsky. | 2nd Aug 1935 | Box 152 \ 3 scan0170 | |
| Letter to E.W. Hives about a new cylinder silencer valve and a proposal to build a working model. | 2nd Aug 1935 | Box 152 \ 3 scan0171 | |
| Letter addressed to Mr. Brodiansky about a silencer invented by Prof. Pio-Oulsky. | 6th Aug 1935 | Box 152 \ 3 scan0172 | |
| Letter to an inventor stating the policy of only considering new inventions if a working model is provided. | 6th Aug 1935 | Box 152 \ 3 scan0173 | |
| Letter from the Tubex Silencer Co. regarding a patented new exhaust silencer and arranging a follow-up meeting. | 17th Jan 1936 | Box 152 \ 3 scan0174 | |
| Advertisement leaflet for the 'Tubex' Fishtail exhaust noise reducer. | 18th Mar 1936 | Box 152 \ 3 scan0175 | |
| Letter to The Tubex Silencer Co. detailing performance figures for their exhaust silencer. | 18th Mar 1936 | Box 152 \ 3 scan0176 | |
| Letter from Burgess Products Company discussing a sample of a combined air filter and silencer, proposing an alternative design, and enclosing a leaflet for a micro switch. | 23th Mar 1936 | Box 152 \ 3 scan0177 | |
| Specification sheet for Burgess Industrial Cleaners, detailing models, dimensions, prices, and standard fittings. | 23th Mar 1936 | Box 152 \ 3 scan0178 | |
| Promotional document detailing the applications and operation of the Burgess Micro Switch. | 23th Mar 1936 | Box 152 \ 3 scan0179 | |
| Product brochure detailing the mechanical and electrical characteristics of the Burgess Micro Switch. | 1st Jan 1934 | Box 152 \ 3 scan0180 | |
| Advance notice detailing the features and benefits of the Burgess Industrial Air Cleaner. | 1st Jan 1934 | Box 152 \ 3 scan0181 | |
| Letter from Burgess Products Company concerning an order for a Chrysler type combined air silencer and filter, and enclosing two related blueprints. | 26th Mar 1936 | Box 152 \ 3 scan0182 | |
| Blueprint of a combination silencer and cleaner. | 30th Apr 1931 | Box 152 \ 3 scan0183 | |
| Blueprint for an assembled silencer, including cross-section, top view, and parts list. | 8th Dec 1933 | Box 152 \ 3 scan0184 | |
| Letter from an engineering company regarding air cleaners and silencers, discussing performance charts and specifications. | 2nd Apr 1936 | Box 152 \ 3 scan0185 | |
| Continuation of a letter from Burgess Products Company regarding data for a third type of filter. | 2nd Apr 1936 | Box 152 \ 3 scan0186 | |
| Data table for Burgess Industrial Air Cleaners showing dimensions and airflow restriction values. | 2nd Apr 1936 | Box 152 \ 3 scan0187 | |
| Graph comparing airflow resistance of a dirty versus a clean gimp at different engine speeds. | 2nd Apr 1936 | Box 152 \ 3 scan0188 | |
| Request to build two Phantom III rear silencers to a provided sketch. | 8th Feb 1937 | Box 152 \ 3 scan0189 | |
| To HPS requesting the fitting of a propeller shaft damper and new rear exhaust silencer to car 32-EX. | 11th Feb 1937 | Box 152 \ 3 scan0190 | |
| Testing the Phantom III air silencer and the subsequent deletion of its support bracket and stiffening diaphragm. | 5th May 1937 | Box 152 \ 3 scan0191 | |
| The failure of an Air Silencer test on a Phantom III due to the lack of support stays. | 14th May 1937 | Box 152 \ 3 scan0192 | |
| Support for the air silencer on the PH.III four-port head engine. | 19th May 1937 | Box 152 \ 3 scan0193 | |
| Recommendations for modifying the air silencer on the Four Fort Head - Ph.III model after a 10,000-mile test. | 2nd Jun 1937 | Box 152 \ 3 scan0194 | |
| Confirmation of a verbal order for two Burgess filter elements for a car being sent for testing. | 4th Jun 1937 | Box 152 \ 3 scan0195 | |
| Requesting the preparation of suspension pieces for the Phantom III silencer. | 7th Jul 1937 | Box 152 \ 3 scan0196 | |
| Comparison of specifications for Packard and Wraith silencers. | 21th Sep 1937 | Box 152 \ 3 scan0197 | |
| Deleting supporting stays for the air silencer on the Phantom III Four Port Head engine. | 21th Sep 1937 | Box 152 \ 3 scan0198 | |
| Modification instructions for the Phantom III Four Port Head Air Silencer. | 4th Oct 1937 | Box 152 \ 3 scan0199 | |
| Letter in French regarding the shipment and installation of silencers. | 22th Sep 1937 | Box 152 \ 3 scan0200 | |
| Page 2 of a letter in French from Pierre F. Mimerel regarding test results and arranging a visit. | 22th Sep 1937 | Box 152 \ 3 scan0201 | |
| Chassis parts tag with handwritten entries in French for a silencer. | 25th Oct 1937 | Box 152 \ 3 scan0202 | |
| Client feedback on a competitor's (Servais) silencer found to be superior to the standard one on a 20/25 HP car. | 25th Oct 1937 | Box 152 \ 3 scan0203 | |
| Inability to test a Servais silencer due to a lack of response from the company, and comparing its design to the Burgess type. | 25th Oct 1937 | Box 152 \ 3 scan0204 | |
| Letter discussing experiments with a Burgess silencer and obtaining one for trial purposes. | 25th Oct 1937 | Box 152 \ 3 scan0205 | |
| Assembly drawing for a 'LASCROUX' silencer on an exhaust system. | 2nd Nov 1937 | Box 152 \ 3 scan0206 | |
| Inability to test a Servais silencer and comparing its construction to the Burgess type. | 2nd Nov 1937 | Box 152 \ 3 scan0207 | |
| Introduction to Mons. Servais to arrange production of a custom Phantom III engine silencer. | 4th Nov 1937 | Box 152 \ 3 scan0208 | |
| Blueprint showing the design for an air intake silencer and cleaner. | 4th Nov 1937 | Box 152 \ 3 scan0209 | |
| Diagram illustrating the external and internal cross-section of a cylindrical filter, showing flow direction. | 19th Jun 1936 | Box 152 \ 3 scan0210 | |
| Article discussing exhaust silencing using a Servais sound-absorption silencer and a related propeller shaft issue. | 19th Jun 1936 | Box 152 \ 3 scan0211 | |
| Article discussing a new method of quieting exhausts using a 'Servais' silencer. | 18th Sep 1936 | Box 152 \ 3 scan0212 | |
| Collection of press clippings from June 1936 reporting on demonstrations of a new 'straight-through' silencer by Servais Services, Ltd. | 11th Jun 1936 | Box 152 \ 3 scan0213 | |
| Road test of a supercharged Alvis Speed '20' and a detailed analysis of a new Servais exhaust silencer. | 12th May 1936 | Box 152 \ 3 scan0214 | |
| Review and advertisement for the J-2 Taylor Cub light aircraft, featuring a Servais silencer. | 18th Jul 1936 | Box 152 \ 3 scan0215 | |
| Press clippings regarding new silencer technology for aircraft engines and other aircraft refinements. | 29th Jul 1936 | Box 152 \ 3 scan0216 | |
| Collection of press clippings about the development and application of the 'Servais Silencer'. | 13th Jun 1937 | Box 152 \ 3 scan0217 | |
| Press cuttings from 'Motor' and 'The Export Trader' describing the Servais straight-through silencer. | 16th Jun 1936 | Box 152 \ 3 scan0218 | |
| Press cuttings and an advertisement regarding the 'Servais Silencer' for reducing vehicle exhaust noise. | 6th Aug 1936 | Box 152 \ 3 scan0219 | |
| Collection of press cuttings and advertisements for Servais Silencers from 1937. | 21th Sep 1937 | Box 152 \ 3 scan0220 | |
| Testimonial letter from a Managing Director about the performance of a 14/60 Dolomite car on a European tour. | 7th Sep 1937 | Box 152 \ 3 scan0221 | |
| Scheme for the air silencer and intake pipe for the Bentley 111 model. | 8th Nov 1937 | Box 152 \ 3 scan0222 | |
| Letter from Burgess Products Company to Mr. Whyman regarding an order for perforated sheets and a follow-up on experimental work. | 16th Oct 1937 | Box 152 \ 3 scan0223 | |
| Letter to Lea & Servais Ltd. providing engine data for a Phantom III car to fit an exhaust silencer. | 15th Nov 1937 | Box 152 \ 3 scan0224 | |
| Tests conducted to reduce power losses in Bentley engine silencing systems. | 5th Nov 1937 | Box 152 \ 3 scan0225 | |
| Test results comparing percentage power loss between a special system and a standard Bentley system with different carburetors. | 5th Nov 1937 | Box 152 \ 3 scan0226 | |
| Analysis of percentage loss in a silencer related to power output and wave effects in an exhaust system. | 5th Nov 1937 | Box 152 \ 3 scan0227 | |
| Test report detailing percentage loss figures for twin manifolds connected to a Bentley expansion box. | 5th Nov 1937 | Box 152 \ 3 scan0228 | |
| Test results for modifications to an exhaust silencer system. | 5th Nov 1937 | Box 152 \ 3 scan0229 | |
| Proposal to test various manifolds and an interference pipe system on a standard Bentley to achieve silence without power loss. | 8th Nov 1937 | Box 152 \ 3 scan0230 | |
| Letter to Burgess Products Co. Ltd. regarding issues with perforated tubing for an experimental silencer and a follow-up on a Phantom III air silencer. | 8th Nov 1937 | Box 152 \ 3 scan0231 | |
| Letter from Burgess Products Company Ltd regarding the development of an air silencer for the Phantom III. | 12th Nov 1937 | Box 152 \ 3 scan0232 | |
| Letter from Lea & Servais Ltd. regarding the maximum available length of a straight-through type silencer. | 16th Nov 1937 | Box 152 \ 3 scan0233 | |
| Letter to Messrs. Lea & Servais Ltd. regarding the maximum available length for a silencer. | 17th Nov 1937 | Box 152 \ 3 scan0234 | |
| Letter from Lea & Servais Ltd. regarding a sample silencer for a Phantom III. | 29th Nov 1937 | Box 152 \ 3 scan0235 | |
| Letter to Lea & Servais Ltd. acknowledging receipt of a sample silencer for testing. | 2nd Dec 1937 | Box 152 \ 3 scan0236 | |
| Follow-up letter from Lea & Servais Ltd. regarding a report on a sample Silencer for the 40/50.HP. Phantom III. | 4th Jan 1938 | Box 152 \ 3 scan0237 | |
| Letter from Lea & Servais Ltd. chasing a report on a preliminary test silencer for the Phantom 111. | 17th Jan 1938 | Box 152 \ 3 scan0238 | |
| Letter to Messrs. Lea & Servais Ltd. regarding the testing of a silencer on a Phantom III car. | 20th Jan 1938 | Box 152 \ 3 scan0239 | |
| Difficulties with the Bentley 111 air silencer and proposing new arrangements. | 9th Feb 1938 | Box 152 \ 3 scan0240 | |
| Alternative proposals for air silencer arrangements on the Bentley 111. | 12th Mar 1938 | Box 152 \ 3 scan0241 | |
| Proposals for alternative air silencer arrangements for the Bentley III model. | 12th May 1936 | Box 152 \ 3 scan0242 | |
| On the failure of a plated mild steel exhaust downtake pipe and suggestions for alternative materials or treatments. | 18th Mar 1938 | Box 152 \ 3 scan0243 | |
| Issue with loose end caps on Wraith & Bentley air silencers and proposing a solution. | 19th Mar 1938 | Box 152 \ 3 scan0244 | |
| Blueprint detailing a modification to an air silencer component. | 29th Mar 1938 | Box 152 \ 3 scan0245 | |
| New design for a Bentley III air silencer, requesting a trial unit be made. | 29th Mar 1938 | Box 152 \ 3 scan0246 | |
| Material changes and cost savings for Wraith and Bentley 'M' series air silencers. | 29th Mar 1938 | Box 152 \ 3 scan0247 | |
| Agreement to change the material for Wraith air silencer frames and end caps, resulting in a cost saving. | 2nd Apr 1938 | Box 152 \ 3 scan0248 | |
| Letter from Lea & Servais Ltd. requesting B.HP figures and information about a silencer on test. | 2nd May 1938 | Box 152 \ 3 scan0249 | |
| Letter to Messrs. Lea & Servais Ltd. regarding the road mileage testing of a silencer on a Phantom III. | 11th May 1938 | Box 152 \ 3 scan0250 | |
| Letter from Lea & Servais Ltd. regarding the thorough testing of their Silencer product. | 16th May 1938 | Box 152 \ 3 scan0251 | |
| Request to build an experimental air silencer for a 7.B.V. Bentley III. | 16th May 1938 | Box 152 \ 3 scan0252 | |
| Letter from Burgess Products Company Ltd regarding the dispatch of two preliminary experimental silencers for testing. | 14th Jul 1938 | Box 152 \ 3 scan0253 | |
| Letter to Burgess Products Co. Ltd. regarding the arrival and testing of silencers X.431 and X.432. | 18th Jul 1938 | Box 152 \ 3 scan0254 | |
| Testing of air silencers for the Bentley III and requesting similar ones be made for other vehicles. | 22th Jul 1938 | Box 152 \ 3 scan0255 | |
| Official order for 12 Burgess Filter Elements for experimental use. | 31th Aug 1938 | Box 152 \ 3 scan0256 | |
| Letter regarding the dispatch of an experimental silencer (X.455) for testing on a new Bentley. | 31th Aug 1938 | Box 152 \ 3 scan0257 | |
| Letter to Burgess Products Co. Ltd. confirming receipt of silencer X455 for testing on a Bentley car. | 2nd Sep 1938 | Box 152 \ 3 scan0258 | |
| Request to place an official order for an experimental exhaust silencer for trial on Bentley cars. | 5th Sep 1938 | Box 152 \ 3 scan0259 | |
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