| Description | Date | Identifier | |
| Letter to The British Tyre & Rubber Co., Ltd. regarding an omitted steam valve seating. | 17th Jul 1937 | Box 94 \ 3 scan0240 | |
| Letter from The Avon India Rubber Co. regarding the manufacture of steam valve seatings. | 19th Jul 1937 | Box 94 \ 3 scan0241 | |
| Letter to The Avon India Rubber Co. Ltd. regarding a mould for a valve seating adaptor. | 27th Jul 1937 | Box 94 \ 3 scan0242 | |
| Letter from Avon India Rubber Co. regarding the production of samples from blueprint Rm.292. | 28th Jul 1937 | Box 94 \ 3 scan0243 | |
| Letter requesting the return of an adaptor (drg. Rm.292) from The British Goodrich Tyre & Rubber Co. Ltd. | 30th Jul 1937 | Box 94 \ 3 scan0244 | |
| Letter from British Tyre & Rubber Co. Ltd. concerning the return of a mould for Adaptors Rm.292. | 31th Jul 1937 | Box 94 \ 3 scan0245 | |
| The loan of an adaptor to The Avon India Rubber Co. | 3rd Aug 1937 | Box 94 \ 3 scan0246 | |
| Failure and modification of the Phantom III Radiator Ball Valve Plug. | 12th Aug 1937 | Box 94 \ 3 scan0247 | |
| Instructing the cessation of fitting a filter gauze on Phantom III radiators due to choking issues. | 26th Aug 1937 | Box 94 \ 3 scan0248 | |
| Instructions for fitting a stand pipe in the Phantom III chassis radiator bottom tank as an experiment to replace a choking filter. | 3rd Sep 1937 | Box 94 \ 3 scan0249 | |
| Request to fit a standpipe to a standard radiator bottom tank for freezing tests. | 6th Sep 1937 | Box 94 \ 3 scan0250 | |
| Request to obtain and prepare a reconditioned and a standard production matrix for inspection. | 14th Sep 1937 | Box 94 \ 3 scan0251 | |
| Cost and manufacturing methods for a Phantom III radiator yoke cross-bracing. | 21th Sep 1937 | Box 94 \ 3 scan0252 | |
| Requesting the assembly of a Phantom III radiator matrix and tanks into a complete unit. | 23th Sep 1937 | Box 94 \ 3 scan0253 | |
| Standardising rubber hose water connections and extending changes from E series to D series chassis. | 23th Sep 1938 | Box 94 \ 3 scan0254 | |
| Requesting to fit a radiator matrix unit to car 37-MX. | 1st Oct 1937 | Box 94 \ 3 scan0255 | |
| Phantom 111 radiator, suggesting work on the rear stays is not urgent and should be postponed. | 11th Oct 1937 | Box 94 \ 3 scan0256 | |
| Instructing the transfer of radiator tanks from a scrap Ph.III matrix to a new one for car 37-EX. | 14th Oct 1937 | Box 94 \ 3 scan0257 | |
| Instructions for fitting a matrix unit, a Cadillac type fan, and connecting a car heater to car 37-EX. | 16th Oct 1937 | Box 94 \ 3 scan0258 | |
| Request for a scheme for a 4' deep Radiator matrix on a Phantom III vehicle. | 16th Oct 1937 | Box 94 \ 3 scan0259 | |
| Invoice for steam valve seatings from Avon India Rubber Co. that were received without an official order. | 20th Oct 1937 | Box 94 \ 3 scan0260 | |
| Letter from James Russell & Co. to Rolls-Royce regarding a sample of Neoprene, a petrol resisting composition. | 21th Oct 1937 | Box 94 \ 3 scan0261 | |
| Letter from Jas. Russell & Co. offering to provide samples for testing and to arrange a meeting. | 21th Oct 1937 | Box 94 \ 3 scan0262 | |
| Requesting an official order for two steam valve seatings from Avon India Rubber Co. Ltd. | 25th Oct 1937 | Box 94 \ 3 scan0263 | |
| Notification to change the old-type radiator matrix on cars 36-EX and 33-EX before sale to customers. | 1st Nov 1937 | Box 94 \ 3 scan0264 | |
| Non-delivery of re-conditioned Mark V matrices from Messrs. Marstons and the subsequent use of Mark VI matrices as replacements. | 10th Nov 1937 | Box 94 \ 3 scan0265 | |
| Requesting the removal of radiator tanks to examine the matrix waterways after a cleaning process. | 17th Nov 1937 | Box 94 \ 3 scan0266 | |
| Summary of overheating issues on the Ph.III model, detailing the causes, remedies, and the amount of scrap involved in the matrix replacement. | 7th Dec 1937 | Box 94 \ 3 scan0267 | |
| Record of the number of Phantom III chassis fitted with Mk.V matrices. | 7th Dec 1937 | Box 94 \ 3 scan0268 | |
| Alterations to the Phantom III radiator steam chamber and cover. | 15th Dec 1937 | Box 94 \ 3 scan0269 | |
| Alternative shutter mounting plates for the Phantom III, recommending scheme PD.78. | 11th Jan 1938 | Box 94 \ 3 scan0270 | |
| Request for a cost estimate for the anodic oxidation of aluminium parts in the water system for a Phantom III chassis. | 17th Jan 1938 | Box 94 \ 3 scan0271 | |
| Cost analysis for the anodic oxidation of Phantom III chassis aluminium water system parts. | 21th Jan 1938 | Box 94 \ 3 scan0272 | |
| Test rig report detailing the results of corrosion tests on Phantom III engine components. | 7th Feb 1938 | Box 94 \ 3 scan0273 | |
| Request to obtain a Ph.III radiator shell from production and loan it to Messrs. Thos. Firth & John Brown Ltd. | 29th Jan 1938 | Box 94 \ 3 scan0274 | |
| Potential modifications to the 'D' series Phantom III radiator. | 7th Feb 1938 | Box 94 \ 3 scan0275 | |
| The corrosion of aluminium engine components on Phantom III cars and tests to mitigate it. | 21th Feb 1938 | Box 94 \ 3 scan0276 | |
| Engine cooling system corrosion tests, including the use of anodized parts and a corrosion inhibitor named 'No-Co-Ro'. | 21th Feb 1938 | Box 94 \ 3 scan0277 | |
| Examination of water jacket corrosion on various car models and the testing of a corrosion inhibitor. | 21th Feb 1938 | Box 94 \ 3 scan0278 | |
| Minimising corrosion in engine cooling systems, discussing issues with specific car models and potential solutions like anodic oxidation. | 21th Feb 1938 | Box 94 \ 3 scan0279 | |
| The effectiveness of a corrosion inhibitor and alternative methods like anodic oxidation for engine cooling systems. | 21th Feb 1938 | Box 94 \ 3 scan0280 | |
| Summary of corrosion test rig results for different engine configurations and treatments. | 21th Feb 1938 | Box 94 \ 3 scan0281 | |
| Table of corrosion observations from tests on experimental cars. | 21th Feb 1938 | Box 94 \ 3 scan0282 | |
| Photograph showing the results of a rig test on an engine cylinder block. | 30th Mar 1922 | Box 94 \ 3 scan0283 | |
| Photograph of the 32-EX model cylinder block after a 15,000-mile test. | 30th Mar 1922 | Box 94 \ 3 scan0284 | |
| Tests of a corrosion inhibitor submitted by Messrs. Newton, Chambers & Co., Ltd. | 24th Jul 1937 | Box 94 \ 3 scan0285 | |
| Difficulty of adjusting the Phantom III radiator steam valve due to seizure and corrosion. | 7th Mar 1938 | Box 94 \ 3 scan0286 | |
| Instructions for issuing a Depot Sheet regarding the checking and maintenance of steam valves on various car series. | 6th Apr 1938 | Box 94 \ 3 scan0287 | |
| Proposing a policy to proactively re-condition old type matrices to prevent overheating complaints. | 23th Apr 1938 | Box 94 \ 3 scan0288 | |
| Replacement of original Mk.V radiator matrices with reconditioned ones for PH.III A series cars. | 23th Apr 1938 | Box 94 \ 3 scan0289 | |
| Progress and costs of changing radiator matrices on 'A' series chassis to prevent overheating. | 2nd May 1938 | Box 94 \ 3 scan0290 | |
| Reports of leaking Phantom III radiator matrices and instructions for handling future occurrences. | 21th May 1938 | Box 94 \ 3 scan0291 | |
| Requesting a report on corrosion samples and the effects of a 'No-Co-Ro' corrosion inhibitor. | 21th Dec 1938 | Box 94 \ 3 scan0292 | |
| Request to analyse corrosion product removed from a Ph.III chassis radiator. | 24th Feb 1939 | Box 94 \ 3 scan0293 | |
| Laboratory report detailing the analysis of a corrosion product from a radiator. | 2nd Mar 1939 | Box 94 \ 3 scan0294 | |
| Outlining the testing procedure for a Spectre frame side member, focusing on torsional strength and welding. | 27th Dec 1933 | Box 94 \ 4 scan0001 | |
| Requesting detail drawings and price quotations for the 'Spectre' project frame and wheel arches. | 21th Mar 1934 | Box 94 \ 4 scan0002 | |
| Drawings for the Spectre Frame and its related components. | 29th Mar 1934 | Box 94 \ 4 scan0003 | |
| Construction details of the Spectre Frame based on M. Sch's drawings 4023/4. | 29th Mar 1934 | Box 94 \ 4 scan0004 | |
| Modifications to the 'Spectre Frame' side channels for a Cadillac-type front suspension. | 9th May 1934 | Box 94 \ 4 scan0005 | |
| The 'Spectre' frame, discussing a schematic for crossmember attachments. | 18th May 1934 | Box 94 \ 4 scan0006 | |
| Modification to the Spectre front crossmember distance piece, converting it from aluminum to steel. | 28th May 1934 | Box 94 \ 4 scan0007 | |
| The delivery and material specification of Spectre Frames from Messrs. John Thompson. | 4th Jul 1934 | Box 94 \ 4 scan0008 | |
| Steel specification for SPECTRE Side Frames from supplier John Thompson. | 7th Jul 1934 | Box 94 \ 4 scan0009 | |
| Requesting further deflection tests to compare bolted and spot-welded Spectre frame samples. | 17th Jul 1934 | Box 94 \ 4 scan0010 | |
| Outlining simple torsion tests for the Spectre Frame to determine the minimum number of bolts required to equal the stiffness of a spot-welded frame. | 17th Jul 1934 | Box 94 \ 4 scan0011 | |
| Test report for Spectre frames, detailing results for spot welded seams under torque. | 3rd Aug 1934 | Box 94 \ 4 scan0012 | |
| Graph from 'Spectre' frame tests plotting angular deflection against torque for spot-welded seams. | 1st Aug 1934 | Box 94 \ 4 scan0013 | |
| Outlining calculations and findings on motor car frame stiffness. | 26th Oct 1934 | Box 94 \ 4 scan0014 | |
| Page discussing the torsional stiffness of various frame members and constructions. | 5th Nov 1934 | Box 94 \ 4 scan0015 | |
| 'Spectre' frame distortion tests, detailing measurements at various points under increasing loads. | 5th Nov 1934 | Box 94 \ 4 scan0016 | |
| Modifications to the bossing on a Spectre Frame to fit a Marles type steering box. | 13th Nov 1934 | Box 94 \ 4 scan0017 | |
| Chassis deflection due to front braking on Bentley & Spectre models. | 18th Dec 1934 | Box 94 \ 4 scan0018 | |
| Chassis deflection tests due to front braking on Bentley and Spectre models. | 18th Dec 1934 | Box 94 \ 4 scan0019 | |
| Analysis of chassis frame buckling, distortion, and front brake performance issues on experimental vehicles. | 18th Dec 1934 | Box 94 \ 4 scan0020 | |
| The results of distortion tests conducted on a Spectre frame. | 20th Dec 1934 | Box 94 \ 4 scan0021 | |
| Inspection report detailing wear, distortion, and failure of various suspension and steering components. | 1st Dec 1934 | Box 94 \ 4 scan0022 | |
| Requesting the drilling of drainage holes in Spectre frame side members. | 22th Dec 1934 | Box 94 \ 4 scan0023 | |
| The results of 'Spectre' frame distortion tests, identifying a weak welded joint. | 1st Jan 1935 | Box 94 \ 4 scan0024 | |
| Welding with frame suppliers and the readiness of a bumper chassis for testing. | 1st Jan 1935 | Box 94 \ 4 scan0025 | |
| Inspection of a failed Spectre frame following braking tests, focusing on welding issues. | 31th Dec 1934 | Box 94 \ 4 scan0026 | |
| Pressing for the Spectre model's front frame to resist brake torque. | 14th Jan 1935 | Box 94 \ 4 scan0027 | |
| Request for a comparative torsional rigidity test between the Spectre chassis frame and the Phantom II frame. | 6th Mar 1935 | Box 94 \ 4 scan0028 | |
| The conventional front end for the 'Spectre' model, detailing frame and wheelbase specifications. | 9th Mar 1935 | Box 94 \ 4 scan0029 | |
| New, more rigid step iron design for the Spectre 3SI (32EX) and associated frame modifications. | 25th Mar 1935 | Box 94 \ 4 scan0030 | |
| Requesting the preparation of a Spectre frame for stiffness testing by removing its components. | 25th Apr 1935 | Box 94 \ 4 scan0031 | |
| Urgently requesting torsional rigidity data for Cadillac and Spectre frames to inform decisions regarding the Bentley. | 27th Apr 1935 | Box 94 \ 4 scan0032 | |
| Comparison between two types of chassis frame crosses using scale models to determine rigidity. | 29th Apr 1935 | Box 94 \ 4 scan0033 | |
| 'Spectre' frame distortions with dashboard, detailing measurements at various points. | 30th Apr 1935 | Box 94 \ 4 scan0034 | |
| Test data showing Spectre chassis frame distortion under various loads without a dashboard fitted. | 2nd May 1935 | Box 94 \ 4 scan0035 | |
| Note describing the setup for balancing a frame around the front cross member. | 3rd May 1935 | Box 94 \ 4 scan0036 | |
| Revised design for the Spectre chassis frame, focusing on modifications to the side channel. | 3rd May 1935 | Box 94 \ 4 scan0037 | |
| Testing the stiffness of a revised Spectre frame design and enclosing a print. | 3rd May 1935 | Box 94 \ 4 scan0038 | |
| The rigidity of the Spectre frame, comparing its weight and stiffness to the Cadillac and Phantom II frames. | 9th May 1935 | Box 94 \ 4 scan0039 | |
| Frame rigidity, body construction, and stiffness tests for Spectre models. | 9th May 1935 | Box 94 \ 4 scan0040 | |
| Note on coachbuilding considerations for different body types, including saloons with sunshine roofs and convertibles. | 9th May 1935 | Box 94 \ 4 scan0041 | |
| Blueprint comparing the chassis frames of a Spectre and a Cadillac. | 10th May 1935 | Box 94 \ 4 scan0042 | |
| Results of rigidity tests on different frame cross designs for the Spectre and Bentley chassis. | 29th May 1935 | Box 94 \ 4 scan0043 | |
| Frame cross rigidity tests conducted on quarter-scale models of various designs. | 22th May 1935 | Box 94 \ 4 scan0044 | |
| The rigidity testing of different frame cross-member designs, comparing the Hotchkiss and Spectre types. | 22th May 1935 | Box 94 \ 4 scan0045 | |
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