| Description | Date | Identifier | |
| Standardisation of parts document for unbalanced radiator shutters. | 27th Sep 1934 | Box 87 \ 1 scan0102 | |
| Estimate for the cost of extra equipment and bringing the D.2 series chassis into production. | 18th Sep 1934 | Box 87 \ 1 scan0103 | |
| Letter to John Marston Limited regarding the inconsistent cooling performance of their Mark V radiator matrices. | 25th Oct 1934 | Box 87 \ 1 scan0104 | |
| Letter requesting advice and the manufacture of a new radiator matrix. | 25th Oct 1934 | Box 87 \ 1 scan0105 | |
| Modifications to the Bentley Marston Mark V radiator matrix based on test results. | 25th Oct 1934 | Box 87 \ 1 scan0106 | |
| Dispatch of a Bentley radiator for a matrix fitting. | 25th Oct 1934 | Box 87 \ 1 scan0107 | |
| Alterations to a Bentley radiator grille for testing purposes. | 25th Oct 1934 | Box 87 \ 1 scan0108 | |
| Request to Messrs. Marston to modify an experimental Bentley Marston Mark V radiator matrix. | 26th Oct 1934 | Box 87 \ 1 scan0109 | |
| Instructions to John Marston Ltd. regarding modifications to a Bentley radiator matrix. | 26th Oct 1934 | Box 87 \ 1 scan0110 | |
| Letter to Messrs. John Marston Limited regarding a leaking radiator matrix being returned for examination. | 29th Oct 1934 | Box 87 \ 1 scan0111 | |
| Further tests on Bentley Radiators at Brooklands. | 1st Nov 1934 | Box 87 \ 1 scan0112 | |
| Summary of cooling system tests with recommendations for fan and matrix configurations on a Bentley car. | 24th Oct 1934 | Box 87 \ 1 scan0113 | |
| Graph comparing the performance of 70mm and 58mm deep Bentley radiator matrices (Marston Mark V) at different car speeds. | 24th Oct 1934 | Box 87 \ 1 scan0114 | |
| Line graph comparing the performance of two similar 58mm Marston Mark V radiator matrices at various car speeds. | 24th Oct 1934 | Box 87 \ 1 scan0115 | |
| Graph comparing carburettor air intake temperatures against car speed for shutter and by-pass radiator controls. | 24th Oct 1934 | Box 87 \ 1 scan0116 | |
| Graph determining the permissible reduction in area for Bentley radiators to achieve equal cooling compared to a standard matrix. | 24th Oct 1934 | Box 87 \ 1 scan0117 | |
| Graph comparing the cooling performance and speeds obtained with three different Bentley fan types against a no-fan configuration. | 24th Oct 1934 | Box 87 \ 1 scan0118 | |
| Instructions for the construction and testing of a new fan cowl for a Bentley radiator. | 9th Nov 1934 | Box 87 \ 1 scan0119 | |
| Further tests and modifications to a radiator grille to improve cooling efficiency. | 14th Sep 1934 | Box 87 \ 1 scan0120 | |
| Graph plotting the air temperature to boil, comparing radiator performance with and without a grille fitted on a Bentley. | 13th Nov 1934 | Box 87 \ 1 scan0121 | |
| Drawings for radiator and engine suspension modifications for the Bentley. | 13th Nov 1934 | Box 87 \ 1 scan0122 | |
| Requesting a study into bi-metal thermostats for hot spot control, referencing American cars and radiator design. | 21th Nov 1934 | Box 87 \ 1 scan0123 | |
| The design and specification of a centrally mounted radiator for a Bentley. | 22th Nov 1934 | Box 87 \ 1 scan0124 | |
| The measurement of air speeds at various points in front of a Bentley radiator on car B-23-AE. | 27th Nov 1934 | Box 87 \ 1 scan0125 | |
| Graph plotting wind speed versus car speed at various measurement positions in front of a Bentley radiator. | 6th Oct 1934 | Box 87 \ 1 scan0126 | |
| Graph of wind speed versus car speed measured at various positions in front of a Bentley radiator with the bonnet off. | 26th Oct 1934 | Box 87 \ 1 scan0127 | |
| Report on anti-spill radiator cap valves, comparing an in-house design to the 'Camel' type. | 29th Nov 1934 | Box 87 \ 1 scan0128 | |
| Dissatisfaction with existing anti-spill radiator caps and recommending a new design based on an American 'Camel' valve. | 29th Nov 1934 | Box 87 \ 1 scan0129 | |
| Diagrammatic sketch of an anti-spill valve in a radiator top tank. | 4th Jan 1935 | Box 87 \ 1 scan0130 | |
| Fitting of a shortened matrix radiator to car 5.B.IV. | 4th Jan 1935 | Box 87 \ 1 scan0131 | |
| Standardisation of parts for a 58 m.m. Harrison Radiator. | 13th Sep 1934 | Box 87 \ 1 scan0132 | |
| Estimated cost and production note for extra jigs and tools for the 'D' series chassis. | 18th Sep 1934 | Box 87 \ 1 scan0133 | |
| Request to order two different Bentley radiator matrices, one from the Harrison Radiator Corporation and one from Marstons. | 16th Jan 1935 | Box 87 \ 1 scan0134 | |
| Letter to John Marstons, Ltd. regarding the construction of American-style radiator matrices for a Bentley. | 16th Jan 1935 | Box 87 \ 1 scan0135 | |
| Comparison of frontal area, weight, and total savings for three different radiator matrix designs. | 19th Jan 1935 | Box 87 \ 1 scan0136 | |
| Comparison table of weights for various Bentley radiator components. | 22th Jan 1935 | Box 87 \ 1 scan0137 | |
| Instructions for building a lightened Bentley radiator and a staybrite steel radiator shutter. | 13th Feb 1935 | Box 87 \ 1 scan0138 | |
| New brace design for the radiator frame on Bentley cars with independently mounted wings. | 18th Mar 1935 | Box 87 \ 1 scan0139 | |
| Comparison table of specifications for the proposed Wraith radiator against the Bentley Experimental and 20/25 HP radiators. | 19th Mar 1935 | Box 87 \ 1 scan0140 | |
| Modifications to the radiator for the Bentley Centrally Mounted Wings scheme. | 20th Mar 1935 | Box 87 \ 1 scan0141 | |
| Instructions for lightening the radiator and constructing a shutter for the Bentley Centrally Mounted Wings scheme. | 20th Mar 1935 | Box 87 \ 1 scan0142 | |
| Instruction to fit a specially constructed Bentley radiator with a reduced matrix area to the streamline car B.23AE. | 20th Mar 1935 | Box 87 \ 1 scan0143 | |
| Acquisition and construction of new Harrison Vee radiator matrices for Bentley, for comparison with Marston Mark V matrices. | 23th Mar 1935 | Box 87 \ 1 scan0144 | |
| Revised table of weights and dimensions for various types of radiator matrices. | 25th Mar 1935 | Box 87 \ 1 scan0145 | |
| Requesting a specific Bentley radiator be rebuilt for comparison tests at Brooklands. | 26th Mar 1935 | Box 87 \ 1 scan0146 | |
| Request to the coppersmiths to make two pipes to connect a Bentley radiator to an engine for flow restriction tests. | 26th Mar 1935 | Box 87 \ 1 scan0147 | |
| Difficulty of fitting an experimental short matrix radiator to car B-23-AE and proposing a temporary solution. | 29th Mar 1935 | Box 87 \ 1 scan0148 | |
| Letter to John Marston Ltd. discussing a weight discrepancy between a new Bentley matrix and an American Vee product. | 4th Apr 1935 | Box 87 \ 1 scan0149 | |
| Comparison table of particulars for two different types of matrices. | 4th Apr 1935 | Box 87 \ 1 scan0150 | |
| Letter from John Marston Limited regarding analysed weights of a 58mm Bentley Matrix and proposing a meeting. | 12th Apr 1935 | Box 87 \ 1 scan0151 | |
| Letter to John Marston Limited arranging a meeting to discuss the weights of Bentley Matrices. | 15th Apr 1935 | Box 87 \ 1 scan0152 | |
| Table of revised matrix weights and specifications for various models. | 16th Apr 1935 | Box 87 \ 1 scan0153 | |
| Request to place an official order with Messrs. John Marston Ltd. for a Bentley Experimental Radiator Matrix. | 24th Apr 1935 | Box 87 \ 1 scan0154 | |
| Letter to John Marston Limited regarding an order for a Mark VI 52 mm. experimental matrix. | 24th Apr 1935 | Box 87 \ 1 scan0155 | |
| Acquisition of a new American Harrison Vee Matrix for Bentley radiator comparison tests. | 3rd May 1935 | Box 87 \ 1 scan0156 | |
| Bentley radiator tests involving a new American Harrison Vee Matrix from John Marston. | 8th May 1935 | Box 87 \ 1 scan0157 | |
| Revised tubular cross-member for a Bentley, related to a centrally mounted radiator. | 25th Mar 1935 | Box 87 \ 1 scan0158 | |
| Tests carried out on Marston Mark VI and Harrison Vee bonded Bentley radiator matrices. | 31th Jul 1935 | Box 87 \ 1 scan0159 | |
| Radiators, water cooling difficulties, and weight reduction. | 31th Jul 1935 | Box 87 \ 1 scan0160 | |
| Results of radiator comparison tests conducted at Brooklands. | 10th Jul 1935 | Box 87 \ 1 scan0161 | |
| Summary comparing the cooling performance and weights of different radiator matrices. | 8th Aug 1935 | Box 87 \ 1 scan0162 | |
| The despatch of two Bentley radiators to John Marston & Co. Ltd. | 12th Aug 1935 | Box 87 \ 1 scan0163 | |
| Scheme to fix rattling radiator shutters on Bentley cars by using spring loading. | 14th Sep 1935 | Box 87 \ 1 scan0164 | |
| Graph plotting water and air temperature against distance during a climb of the Stelvio Pass. | 30th Aug 1935 | Box 87 \ 1 scan0165 | |
| Radiator tests at John Marston Ltd., comparing various matrices and correlating rig tests with road tests. | 6th Nov 1935 | Box 87 \ 1 scan0166 | |
| Methods for measuring water and air flows, followed by criticisms of the test rig. | 6th Nov 1935 | Box 87 \ 1 scan0167 | |
| Issues with a test rig for measuring heat and flow, with suggestions for improvements. | 6th Nov 1935 | Box 87 \ 1 scan0168 | |
| Brief list and summary of tests comparing heat dissipation and air speed in various radiator matrices. | 6th Nov 1935 | Box 87 \ 1 scan0169 | |
| Summary of findings and recommendations from comparative tests on different radiator matrices. | 6th Nov 1935 | Box 87 \ 1 scan0170 | |
| Calculations for the heat dissipation and critical air temperature of a Spectre matrix. | 6th Nov 1935 | Box 87 \ 1 scan0171 | |
| Calculations for pressure correction under the bonnet based on car speed and air velocity. | 6th Nov 1935 | Box 87 \ 1 scan0172 | |
| Calculations for cooling performance, heat dissipation and critical air temperature. | 6th Nov 1935 | Box 87 \ 1 scan0173 | |
| Calculations comparing the dissipation and critical temperature of Mark VI and Mark V components. | 6th Nov 1935 | Box 87 \ 1 scan0174 | |
| Calculation for Bentley (85 m.p.h. Full Throttle) using Marston Mark VI 52 m.m. Matrix. | 7th Nov 1935 | Box 87 \ 1 scan0175 | |
| Estimation of theoretical pressure under the Spectre bonnet at a car speed of 85 m.p.h. | 7th Nov 1935 | Box 87 \ 1 scan0176 | |
| Calculation for total head under a bonnet, with a note regarding pressure tests conducted in France on a Spectre bonnet. | 7th Nov 1935 | Box 87 \ 1 scan0177 | |
| Graph comparing the cooling properties of Marston Mk. VI and A.H.V. 52 M.M. Bentley matrices. | 11th Oct 1935 | Box 87 \ 1 scan0178 | |
| Graph showing the variation of cooling with car speed for 52mm Mk V and Mk VI Marston matrices. | 11th Oct 1935 | Box 87 \ 1 scan0179 | |
| Graph showing the variation of cooling with matrix depth at various car speeds for Marston Mk IV Matrices. | 11th Oct 1935 | Box 87 \ 1 scan0180 | |
| Graph showing the variation of cooling with car speed for different depths and types of Marston Mk V radiator matrices. | 11th Oct 1935 | Box 87 \ 1 scan0181 | |
| Graph showing the variation of air speed through a radiator core against car speed for different matrix types. | 11th Oct 1935 | Box 87 \ 1 scan0182 | |
| Graph showing the variation of cooling with air speed through different Marston cores. | 20th Jun 1935 | Box 87 \ 1 scan0183 | |
| Graph plotting under bonnet pressures in inches of water against speed in miles per hour. | 20th Jun 1935 | Box 87 \ 1 scan0184 | |
| Inspection scheme for fixed radiator shutters and comparing rattling complaints between RR and Bentley models. | 10th Dec 1935 | Box 87 \ 1 scan0185 | |
| Scheme for fixed radiator shutters on a Bentley radiator. | 11th Dec 1935 | Box 87 \ 1 scan0186 | |
| Bentley Radiator Grille, noting that its slats are identical to those used on the Spectre model. | 13th Dec 1935 | Box 87 \ 1 scan0187 | |
| Requesting the urgent return of a radiator used for fitting spring-loaded shutters. | 20th Dec 1935 | Box 87 \ 1 scan0188 | |
| Design modifications for a slatted Bentley radiator grille model. | 21th Dec 1935 | Box 87 \ 1 scan0189 | |
| Expressing disapproval of the Slatted Bentley Radiator. | 3rd Jan 1936 | Box 87 \ 1 scan0190 | |
| List of estimated critical atmospheric temperatures for 20/25 and Bentley radiators with various engine and matrix configurations. | 15th Jan 1936 | Box 87 \ 1 scan0191 | |
| Request to complete an order for a 58 m.m. Mark VI Marston Matrix for a 6-B-IV chassis for engine cooling tests. | 31th Jan 1936 | Box 87 \ 1 scan0192 | |
| Flimsy aluminium radiator shutter bearing support plate on model 6-B-IV, recommending a stiffer steel replacement. | 6th Feb 1936 | Box 87 \ 1 scan0193 | |
| Distance piece for mounting a radiator on a stiffened Bentley chassis, requesting one be made. | 25th Mar 1936 | Box 87 \ 1 scan0194 | |
| Proposing to replace rubber hoses and Dermatine joints with Leyland 'PR' hoses and Klingerite jointing on water connections for the Phantom III, Bentley & 25/30 models. | 6th Jul 1936 | Box 87 \ 1 scan0195 | |
| Sending a Bentley Mark VI radiator matrix for testing on a Bumper chassis. | 22th Oct 1936 | Box 87 \ 1 scan0196 | |
| Instructions to modify and examine a matrix for a Bentley Bump Radiator. | 30th Oct 1936 | Box 87 \ 1 scan0197 | |
| Cancelling previous instructions and providing new ones for reconditioning and rebuilding a radiator matrix for a Bentley. | 14th Nov 1936 | Box 87 \ 1 scan0198 | |
| Poor fit of replacement slats for Bentley radiator shutters and suggesting depots stock and shape them locally. | 2nd Dec 1936 | Box 87 \ 1 scan0199 | |
| Replacement and fitting of Bentley radiator shutters. | 2nd Dec 1936 | Box 87 \ 1 scan0200 | |
| Design modifications for the Bentley III radiator mounting. | 23th Dec 1936 | Box 87 \ 1 scan0201 | |
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