| Description | Date | Identifier | |
| Invoices from The British Tyre & Rubber Co. Ltd. for engine mounting housings and a mould. | 26th Jun 1935 | Box 93 \ 1 scan0163 | |
| Letter from Griffin and Tatlock Ltd. describing a new instrument for measuring the hardness and thickness of rubber. | 27th Jun 1935 | Box 93 \ 1 scan0164 | |
| Product leaflet describing the method of use and significance of the R.A.B.R.M. Hardness and Thickness Gauge for Rubber. | 27th Jun 1935 | Box 93 \ 1 scan0165 | |
| The requirements, construction, and use of a R.A.B.R.M. rubber hardness gauge. | 27th Jun 1935 | Box 93 \ 1 scan0166 | |
| Pamphlet for the Griffin-Sutton Bomb Calorimeter detailing calorific value calculations. | 27th Jun 1935 | Box 93 \ 1 scan0167 | |
| Product information and specimen determination for the Griffin-Sutton Bomb Calorimeter. | 27th Jun 1935 | Box 93 \ 1 scan0168 | |
| Specification, price list, and operating instructions for a combustion vessel and associated calorimetric equipment. | 1st Mar 1931 | Box 93 \ 1 scan0169 | |
| Parts list and operating instructions for the Griffin-Sutton Bomb Calorimeter Outfit and Pellet Press. | 1st Mar 1931 | Box 93 \ 1 scan0170 | |
| Cover letter attaching a copy of an instruction regarding a previous quotation. | 10th Jul 1935 | Box 93 \ 1 scan0171 | |
| Letter to a supplier regarding the despatch of steel parts and an urgent request for rubber samples and moulds. | 16th Aug 1935 | Box 93 \ 1 scan0172 | |
| Urgent order memo for the despatch of rubber containers and distance pieces to The British Tyre & Rubber Co. | 16th Aug 1935 | Box 93 \ 1 scan0173 | |
| Urgent request for 3 rubbers with steel inserts from The British Tyre & Rubber Co. Ltd. | 20th Aug 1935 | Box 93 \ 1 scan0174 | |
| Quotation from British Tyre & Rubber Co. Ltd. for rubber parts and moulds. | 20th Aug 1935 | Box 93 \ 1 scan0175 | |
| Supply and production of Spectre Front Suspension Rubber Buffers. | 21th Aug 1935 | Box 93 \ 1 scan0176 | |
| Letter from British Tyre & Rubber Co. Ltd. concerning incorrect inserts and proceeding with the work. | 22th Aug 1935 | Box 93 \ 1 scan0177 | |
| Short internal memo or telegram regarding an arrival time. | 23th Aug 1935 | Box 93 \ 1 scan0178 | |
| Request to issue a covering order for rubbers to the British Tyre & Rubber Co., Burton. | 25th Sep 1935 | Box 93 \ 1 scan0179 | |
| Letter to the British Tyre & Rubber Co.Ltd. requiring soft grade rubber parts. | 25th Sep 1935 | Box 93 \ 1 scan0180 | |
| Urgent request to despatch a Phantom III rear engine rubber for replacement with a softer grade. | 27th Sep 1935 | Box 93 \ 1 scan0181 | |
| Requesting an official order be placed with the British Tyre & Rubber Co. Ltd for rubber parts and modifications to steel inserts. | 27th Sep 1935 | Box 93 \ 1 scan0182 | |
| Letter to The British Tyre & Rubber Co. Ltd. about required rubbers and the modification of steel inserts. | 27th Sep 1935 | Box 93 \ 1 scan0183 | |
| Confirming a telephone order for four special soft grade rubbers from the British Tyre & Rubber Co. Ltd. | 2nd Oct 1935 | Box 93 \ 1 scan0184 | |
| Results of compression tests on the Spectre Engine suspension rubber. | 1st Oct 1935 | Box 93 \ 1 scan0185 | |
| Rating test report for a Spectre engine suspension rubber, detailing load versus deflection measurements. | 3rd Sep 1935 | Box 93 \ 1 scan0186 | |
| Rating test graph showing load versus deflection for a Spectre engine suspension rubber mount. | 3rd Sep 1935 | Box 93 \ 1 scan0187 | |
| Invoice from the British Tyre & Rubber Co. Ltd. for rubber parts, seeking payment authorization. | 3rd Oct 1935 | Box 93 \ 1 scan0188 | |
| Request to place an official order for two types of rubber parts from The British Tyre & Rubber Co. Ltd. | 5th Oct 1935 | Box 93 \ 1 scan0189 | |
| Despatch note for rubber parts to be replaced with a softer grade for order 54117. | 10th Oct 1935 | Box 93 \ 1 scan0190 | |
| Letter to The British Tyre & Rubber Co. Ltd. about the replacement of rubber parts with a specific hardness requirement. | 10th Oct 1935 | Box 93 \ 1 scan0191 | |
| Letter from British Tyre & Rubber Co. Ltd. confirming a request to replace specific rubbers with a different durometer hardness. | 11th Oct 1935 | Box 93 \ 1 scan0192 | |
| Letter to The British Tyre & Rubber Co. Ltd. chasing the despatch of rubber components with specific durometer ratings. | 22th Oct 1935 | Box 93 \ 1 scan0193 | |
| Letter from a supplier confirming despatch of rubber parts and reporting an issue with incorrectly sized steel inserts. | 25th Oct 1935 | Box 93 \ 1 scan0194 | |
| Follow-up letter regarding an urgent order for corrected steel inserts. | 29th Oct 1935 | Box 93 \ 1 scan0195 | |
| Decision memo changing the hardness specification for Phantom III engine rubbers. | 29th Oct 1935 | Box 93 \ 1 scan0196 | |
| Request to despatch two front engine mounting caps to G.W. Hancock at Chateauroux. | 29th Oct 1935 | Box 93 \ 1 scan0197 | |
| Testing of soft rubber engine mountings for a Phantom III temporary bumper chassis. | 30th Oct 1935 | Box 93 \ 1 scan0198 | |
| Requesting a covering order for rubbers and steel inserts from the British Tyre and Rubber Co. Ltd. | 30th Oct 1935 | Box 93 \ 1 scan0199 | |
| Letter to a supplier regarding delays and missing parts such as rubbers and steel inserts. | 30th Oct 1935 | Box 93 \ 1 scan0200 | |
| Letter to The British Tyre & Rubber Co. Ltd. regarding delays and queries about rubber and steel insert orders. | 30th Oct 1935 | Box 93 \ 1 scan0201 | |
| Letter from a supplier regarding the correction and supply of steel inserts and rubber parts. | 31th Oct 1935 | Box 93 \ 1 scan0202 | |
| Letter from British Tyre & Rubber Co. Ltd. regarding the dispatch of rubber samples that have passed inspection. | 30th Oct 1935 | Box 93 \ 1 scan0203 | |
| Letter to British Tyre & Rubber Co. Ltd. regarding issues with rubber parts becoming loose and considering other manufacturers. | 5th Nov 1935 | Box 93 \ 1 scan0204 | |
| Letter to The British Tyre & Rubber Co. Ltd. requesting the destructive testing of rubber samples. | 11th Nov 1935 | Box 93 \ 1 scan0205 | |
| Despatch of two rubber parts to the British Tyre & Rubber Co. Ltd. for inspection. | 11th Nov 1935 | Box 93 \ 1 scan0206 | |
| Request to send a covering order to the British Tyre & Rubber Co. Ltd. for two types of rubbers. | 11th Nov 1935 | Box 93 \ 1 scan0207 | |
| Letter from George Spencer, Moulton & Co. Ltd. to E. Hives proposing rubber engine mountings. | 11th Nov 1935 | Box 93 \ 1 scan0208 | |
| Letter to Messrs. George Spencer, Moulton & Co. Ltd. regarding testing engine mounting rubbers and the challenge of rubber-to-steel adhesion. | 12th Nov 1935 | Box 93 \ 1 scan0209 | |
| Letter from George Spencer, Moulton & Co. Ltd. requesting a drawing of a mounting part. | 13th Nov 1935 | Box 93 \ 1 scan0210 | |
| Request to issue a covering order to The British Tyre & Rubber Co. Ltd. for vulcanising rubber buffers. | 15th Nov 1935 | Box 93 \ 1 scan0211 | |
| Invoice from British Tyre & Rubber Co. Ltd. for six F.87575 Rubbers and requesting payment authorization. | 18th Nov 1935 | Box 93 \ 1 scan0212 | |
| Requesting an official order for F.87575 Rubbers from The British Tyre & Rubber Co. Ltd. | 25th Nov 1935 | Box 93 \ 1 scan0213 | |
| Official order to cover invoices from British Tyre & Rubber Co. Ltd. | 13th Jan 1936 | Box 93 \ 1 scan0214 | |
| Order confirmation from British Tyre & Rubber Co. Ltd. for various rubber components. | 9th Jan 1936 | Box 93 \ 1 scan0215 | |
| Invoice from British Tyre & Rubber Co. Ltd. for various buffers and brackets. | 9th Jan 1936 | Box 93 \ 1 scan0216 | |
| Invoice from British Tyre & Rubber Co. Ltd. for various brackets and parts. | 9th Jan 1936 | Box 93 \ 1 scan0217 | |
| Order confirmation from British Tyre & Rubber Co. Ltd. for various buffers and brackets. | 10th Jan 1936 | Box 93 \ 1 scan0218 | |
| Request to issue an order to cover four invoices from the British Tyre & Rubber Co., Ltd. | 16th Jan 1936 | Box 93 \ 1 scan0219 | |
| Modified Phantom III front suspension main lever fulcrum pin and a revised central lubrication spring coil. | 24th Sep 1936 | Box 93 \ 1 scan0220 | |
| Changing the material of certain Phantom III chassis parts from nickel steel to mild steel to reduce costs. | 27th Oct 1936 | Box 93 \ 1 scan0221 | |
| Note on the delivery status of sidemember and crossmember parts for the Phantom III chassis. | 28th Oct 1936 | Box 93 \ 1 scan0222 | |
| Letter to George Angus & Co. Ltd. regarding the testing of gasket material and petrol pump diaphragms. | 29th Oct 1936 | Box 93 \ 1 scan0223 | |
| Manufacturing difficulties and a 50% scrap rate for a rear engine suspension bracket, recommending a design revision. | 13th Nov 1936 | Box 93 \ 1 scan0224 | |
| Revised design for the Phantom III Engine Suspension Bracket. | 3rd Dec 1936 | Box 93 \ 1 scan0225 | |
| Cost-saving proposal for the Phantom III Engine Suspension Bracket by altering the material and manufacturing process. | 3rd Dec 1936 | Box 93 \ 1 scan0226 | |
| Request to place an official order for two Silentbloc Bushes taken from the London factory. | 12th Feb 1937 | Box 93 \ 1 scan0227 | |
| Revised rear engine support for the Phantom III, involving an altered clutch casing. | 12th Dec 1936 | Box 93 \ 1 scan0228 | |
| Deflection test graph for a 20/25 front engine mounting rubber. | 22th Mar 1937 | Box 93 \ 1 scan0229 | |
| Graph plotting the results of deflection tests on a gearbox rear support bracket. | 15th Mar 1937 | Box 93 \ 1 scan0230 | |
| Letter from John Bull Rubber Co., Ltd. arranging a meeting to discuss rubber bonding. | 15th Apr 1937 | Box 93 \ 1 scan0231 | |
| Modified rear engine mounting for the Phantom III. | 24th Aug 1937 | Box 93 \ 1 scan0232 | |
| Tests and conclusions regarding sideways shake on a Phantom III chassis with different engine mountings. | 29th Sep 1937 | Box 93 \ 1 scan0233 | |
| Request to order two 3/4' thick rubber blocks for a Phantom III rear mounting. | 4th Nov 1937 | Box 93 \ 1 scan0234 | |
| Instructing the testing of a 4-port induction pipe for a 20-HP head, potentially for the Spectre model. | 19th Sep 1933 | Box 93 \ 2 scan0001 | |
| Proving of an induction system for a 12-cylinder engine. | 22th Sep 1933 | Box 93 \ 2 scan0002 | |
| Request to modify the induction pipe for a 12-cylinder engine to allow for carburetter rotation. | 28th Sep 1933 | Box 93 \ 2 scan0003 | |
| Test of small S.U. carburetters on a Bentley engine for the Spectre engine project. | 13th Nov 1933 | Box 93 \ 2 scan0004 | |
| Small carburetter for the Spectre engine, confirming there is no appreciable power difference between two sizes. | 20th Nov 1933 | Box 93 \ 2 scan0005 | |
| Comparison of the main dimensions of 1 1/4 and 1 3/8 inch diameter S.U. carburettors. | 15th Nov 1933 | Box 93 \ 2 scan0006 | |
| Print of a larger bellows for an automatic carburetter control scheme. | 1st May 1934 | Box 93 \ 2 scan0007 | |
| Performance graph comparing 1 3/8' and 1 1/4' S.U. carburettors, plotting B.HP and B.M.E.P. against R.P.M. | 15th May 1934 | Box 93 \ 2 scan0008 | |
| Experimental department report on testing the proposed Spectre Induction System. | 15th May 1934 | Box 93 \ 2 scan0009 | |
| Tests for distribution and power outputs using the Spectre Induction System on a Bentley engine. | 15th May 1934 | Box 93 \ 2 scan0010 | |
| Test No. 3 report on carburettor performance, noting cylinders 1 and 2 run richer at top speeds. | 15th May 1934 | Box 93 \ 2 scan0011 | |
| Performance graph showing carburation and power output for a 3 1/2 Litre Bentley engine. | 1st Aug 1934 | Box 93 \ 2 scan0012 | |
| Performance graph comparing carburation options for a 3 1/2 Litre Bentley engine. | 7th May 1934 | Box 93 \ 2 scan0013 | |
| Drawings for the manual mixture control on the Spectre model, noting it is an interim solution. | 21th Jun 1934 | Box 93 \ 2 scan0014 | |
| Request to remove carburettors from a Spectre chassis unit and replace them with carburettors from a test bed unit. | 19th Sep 1934 | Box 93 \ 2 scan0015 | |
| Supply and adaptation of new carburetters for Spectre and Bentley engines. | 20th Sep 1934 | Box 93 \ 2 scan0016 | |
| Requesting information on the functioning of experimental Automatic Mixture and Idling controls. | 25th Sep 1934 | Box 93 \ 2 scan0017 | |
| Manufacturing status and delays of automatic carburetter controls. | 26th Sep 1934 | Box 93 \ 2 scan0018 | |
| Arrangement to fit carburettors from Unit 1 to Unit 2 for the Spectre project. | 22th Oct 1934 | Box 93 \ 2 scan0019 | |
| Request to amend a design and make a new pipe for the Spectre Induction System. | 25th Oct 1934 | Box 93 \ 2 scan0020 | |
| Difficulties with the Spectre induction system and slow running, possibly requiring a cylinder head redesign. | 26th Oct 1934 | Box 93 \ 2 scan0021 | |
| Spectre carburation tests comparing different induction systems on a six-cylinder engine. | 4th Dec 1934 | Box 93 \ 2 scan0022 | |
| Test results for different configurations of induction pipes and carburettors. | 4th Dec 1934 | Box 93 \ 2 scan0023 | |
| Results of tests on induction pipes and carburetors, focusing on performance at low RPM. | 4th Dec 1934 | Box 93 \ 2 scan0024 | |
| Camshaft overlap and induction pipe tests to improve slow running performance. | 4th Dec 1934 | Box 93 \ 2 scan0025 | |
| Test report No. 6 on an induction pipe and carburetter arrangement, comparing it to a Bentley and Spectre engine. | 4th Dec 1934 | Box 93 \ 2 scan0026 | |
| Modifications to an existing induction pipe, showing new branch pipes to the inlet ports. | 4th Dec 1934 | Box 93 \ 2 scan0027 | |
| Requesting carburettor modifications for the 'Spectre' No. 3 test unit. | 18th Jan 1935 | Box 93 \ 2 scan0028 | |
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