| Description | Date | Identifier | |
| Letter to John Marston Ltd. regarding an altered drawing for a Wraith 80 radiator due to a drawing office error. | 10th Oct 1938 | Box 150 \ 2 scan0120 | |
| Dissatisfaction with a quotation from John Marstons for radiators and the intention to contact other firms. | 15th Oct 1938 | Box 150 \ 2 scan0121 | |
| Letter of complaint regarding postponed appointments and arranging for the return of a radiator and drawings. | 14th Oct 1938 | Box 150 \ 2 scan0122 | |
| Letter to J. Marston Ltd. regarding radiator production dates, quotation dissatisfaction, and quality complaints. | 14th Oct 1938 | Box 150 \ 2 scan0123 | |
| Cover note for copies of correspondence with Messrs. John Marston Ltd. | 15th Oct 1938 | Box 150 \ 2 scan0124 | |
| Letter to John Marston Ltd. regarding responsibility for repair work on faulty oil coolers. | 15th Oct 1938 | Box 150 \ 2 scan0125 | |
| Letter to Messrs. J. Marston Ltd. regarding quantities of hand and dip soldered coolers and the purchasing approval process. | 15th Oct 1938 | Box 150 \ 2 scan0126 | |
| Letter from John Marston Limited to arrange a meeting with Mr. Steadman. | 15th Oct 1938 | Box 150 \ 2 scan0127 | |
| Letter to a rubber company seeking clarification on the purpose of supplied rubber hose samples. | 17th Oct 1938 | Box 150 \ 2 scan0128 | |
| Letter from The Leyland & Birmingham Rubber Co Ltd regarding the properties of hose connections. | 18th Oct 1938 | Box 150 \ 2 scan0129 | |
| Inquiry to a rubber company about the cost and feasibility of altering a former for a rubber hose connection. | 19th Oct 1938 | Box 150 \ 2 scan0130 | |
| Letter to John Marston Ltd. regarding the return of updated drawings for B.III, B.50, and Wraith 80 radiators. | 20th Oct 1933 | Box 150 \ 2 scan0131 | |
| Letter from a supplier discussing an amendment to a hose connection part, including a price increase and a query about the new length. | 21th Oct 1938 | Box 150 \ 2 scan0132 | |
| Letter from Rotherham & Sons Ltd. enclosing a sample of a Radiator Overflow Valve following a visit to the Earls Court Motor Exhibition. | 24th Oct 1938 | Box 150 \ 2 scan0133 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding alterations to a hose connection and ordering experimental quantities. | 24th Oct 1938 | Box 150 \ 2 scan0134 | |
| Letter to John Marston Ltd. regarding radiator schemes for Bentley and Wraith models. | 25th Oct 1938 | Box 150 \ 2 scan0135 | |
| Page 2 of a letter to J. Marston Ltd. requesting the weight of various Bentley III radiator components. | 25th Oct 1938 | Box 150 \ 2 scan0136 | |
| Letter to Rotherham & Sons Ltd. clarifying requirements for a radiator overflow valve and requesting a quotation. | 26th Oct 1938 | Box 150 \ 2 scan0137 | |
| Letter to John Marston Ltd. regarding an overlooked defect on a B.III radiator assembly. | 26th Oct 1938 | Box 150 \ 2 scan0138 | |
| Letter from The Leyland & Birmingham Rubber Co Ltd regarding manufacturing constraints for a modified hose connection. | 27th Oct 1938 | Box 150 \ 2 scan0139 | |
| Letter to John Marston Ltd. regarding modifications to Bentley II & III dummy shutter sets and parts for a Bentley 50 radiator. | 29th Oct 1938 | Box 150 \ 2 scan0140 | |
| Letter to J. Marston Ltd. detailing soldering defects on a bottom tank and matrix. | 29th Oct 1938 | Box 150 \ 2 scan0141 | |
| Despatch of a damaged Bentley III radiator matrix unit for salvage. | 29th Oct 1938 | Box 150 \ 2 scan0142 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. requesting a modification to a rubber hose connection. | 31th Oct 1938 | Box 150 \ 2 scan0143 | |
| Official order for two hose connections from Leyland & Birmingham Rubber Co. Ltd. | 1st Nov 1938 | Box 150 \ 2 scan0144 | |
| Letter from a rubber manufacturer confirming the preparation and despatch of hose connections pending an official order. | 2nd Nov 1938 | Box 150 \ 2 scan0145 | |
| Blueprints for a Radiator Support Block for Bentley and Silver Wraith chassis. | 2nd Nov 1938 | Box 150 \ 2 scan0146 | |
| Letter from John Marston Limited regarding modifications and repairs to Bentley radiator components. | 3rd Nov 1938 | Box 150 \ 2 scan0147 | |
| Letter from John Marston Ltd. regarding soldering defects and production methods for tanks. | 3rd Nov 1938 | Box 150 \ 2 scan0148 | |
| Letter to John Marston Ltd. requesting the production of a mascot cap adapter for a Bentley 50 radiator. | 4th Nov 1938 | Box 150 \ 2 scan0149 | |
| Letter from John Marston Limited providing a list of component weights for the Bentley 50 Matrix Unit. | 4th Nov 1938 | Box 150 \ 2 scan0150 | |
| Letter from John Marston Limited concerning the flow testing of radiator matrices. | 4th Nov 1938 | Box 150 \ 2 scan0151 | |
| Letter detailing the procedure for the flow testing of radiator matrices. | 4th Nov 1938 | Box 150 \ 2 scan0152 | |
| Order of a replacement Bentley III matrix unit from John Marston. | 5th Nov 1938 | Box 150 \ 2 scan0153 | |
| The return and no-charge rectification of a defective experimental B.III radiator by Messrs. Marston. | 5th Nov 1938 | Box 150 \ 2 scan0154 | |
| Letter from Rotherham & Sons Ltd enclosing a drawing for a radiator overflow valve and providing a price. | 9th Nov 1938 | Box 150 \ 2 scan0155 | |
| Blueprint showing a cross-section of a radiator overflow valve. | 5th Nov 1938 | Box 150 \ 2 scan0156 | |
| Letter to John Marston Ltd. regarding a damaged Bentley III matrix and a proposed modification for future radiators. | 5th Nov 1938 | Box 150 \ 2 scan0157 | |
| Letter to John Marston Ltd. requesting a dummy radiator for a mock-up chassis and enquiring about the progress on a Wraith 80 radiator unit. | 9th Nov 1938 | Box 150 \ 2 scan0158 | |
| The despatch of sectioned rubber hose connections and a corrosion inhibitor sample for inspection. | 14th Nov 1938 | Box 150 \ 2 scan0159 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding faulty hose connections on an experimental car. | 14th Nov 1938 | Box 150 \ 2 scan0160 | |
| Letter from a supplier discussing timelines for manufacturing a dummy radiator, a Wraith 80 radiator unit, and a Bentley 50 radiator. | 14th Nov 1938 | Box 150 \ 2 scan0161 | |
| Requesting the dispatch of a Bentley III Radiator Shell and Grille to Messrs. Marstons for repair. | 14th Nov 1938 | Box 150 \ 2 scan0162 | |
| Message clarifying that the B.III mock-up radiator is required for Sunbeam, Wolverhampton, not the B.50. | 15th Nov 1938 | Box 150 \ 2 scan0163 | |
| Request to Marstons for a B.50 mock-up radiator and associated parts for a sales mock-up car. | 15th Nov 1938 | Box 150 \ 2 scan0164 | |
| Letter to John Marston Ltd. requesting a Wraith 80 union radiator unit. | 17th Nov 1938 | Box 150 \ 2 scan0165 | |
| Letter from a rubber manufacturer regarding faulty hose connections and investigating the issue with a corrosion inhibitor. | 17th Nov 1938 | Box 150 \ 2 scan0166 | |
| Laboratory report from The Leyland & Birmingham Rubber Co. regarding a complaint about faulty hose connections. | 21th Nov 1938 | Box 150 \ 2 scan0167 | |
| Immersion tests comparing the absorptive effects of an inhibitor solution and water on rubber samples. | 21th Nov 1938 | Box 150 \ 2 scan0168 | |
| Material selection and procurement of balls for the Wraith radiator steam valve. | 22th Nov 1938 | Box 150 \ 2 scan0169 | |
| Official order be placed with Messrs. John Marston Ltd. for a radiator and a new matrix unit. | 24th Nov 1938 | Box 150 \ 2 scan0170 | |
| Letter from a supplier confirming the use of a temporary wooden shaper for an order of hose connections to allow for potential modifications. | 25th Nov 1938 | Box 150 \ 2 scan0171 | |
| Request for analysis of a corrosion inhibitor sample from chassis 3.BT.187 and its effects on various metals. | 25th Nov 1938 | Box 150 \ 2 scan0172 | |
| Letter to Messrs. John Marston Ltd. regarding an altered drawing for a shutter bearing strip for Bentley radiators. | 28th Nov 1938 | Box 150 \ 2 scan0173 | |
| Letter from John Marston Ltd. confirming receipt of an altered drawing for the shutter bearing strip on Bentley III and Bentley 50 radiators. | 29th Nov 1938 | Box 150 \ 2 scan0174 | |
| Letter to Birlec Ltd. to arrange a meeting to discuss the application of copper brazing for radiator manufacture. | 30th Nov 1938 | Box 150 \ 2 scan0175 | |
| Letter from Birmingham Electric Furnaces Ltd regarding copper brazing for radiators and arranging a meeting. | 1st Dec 1938 | Box 150 \ 2 scan0176 | |
| Letter to John Marston Ltd. regarding a visit to discuss two experimental radiators, one using pressure cooling. | 2nd Dec 1938 | Box 150 \ 2 scan0177 | |
| Parts list with replacement part numbers for the B.38 radiator. | 2nd Dec 1938 | Box 150 \ 2 scan0178 | |
| Letter to Birmingham Electric Furnaces Ltd. to arrange a meeting to discuss the application of copper brazing in radiator manufacturing. | 3rd Dec 1938 | Box 150 \ 2 scan0179 | |
| Letter from a supplier responding to a complaint about hose connections and providing a new sample for testing. | 3rd Dec 1938 | Box 150 \ 2 scan0180 | |
| Letter from John Marston Limited to arrange a meeting to discuss two further experimental radiators. | 5th Dec 1938 | Box 150 \ 2 scan0181 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding testing a corrosion inhibitor on their rubber and requesting sample hose connections. | 6th Dec 1938 | Box 150 \ 2 scan0182 | |
| Letter from a rubber manufacturer regarding sample hose connections and their resistance to a corrosion inhibitor. | 7th Dec 1938 | Box 150 \ 2 scan0183 | |
| Letter to John Marston Ltd. requesting the return of a sample radiator drain cock. | 9th Dec 1938 | Box 150 \ 2 scan0184 | |
| Inquiry for a device to cut off a car's ignition based on water system temperature or pressure. | 9th Dec 1938 | Box 150 \ 2 scan0185 | |
| Inquiry to The British Thermostat Co. Ltd. for a device to cut off ignition based on coolant temperature or pressure. | 9th Dec 1938 | Box 150 \ 2 scan0186 | |
| Letter from John Marston Limited returning a Radiator Drain Cock inadvertently left at their works. | 12th Dec 1938 | Box 150 \ 2 scan0187 | |
| Transfer of a B.50 mock-up radiator unit for a Bentley 50 mock-up chassis. | 16th Dec 1938 | Box 150 \ 2 scan0188 | |
| Official order for four different radiators be sent to Messrs. John Marston Ltd. | 16th Dec 1938 | Box 150 \ 2 scan0189 | |
| Requesting a report on corrosion samples from steam valve towers and the effectiveness of a corrosion inhibitor. | 21th Dec 1938 | Box 150 \ 2 scan0190 | |
| Internal instruction to place an order with Messrs. John Marston Ltd. for one B.38 radiator. | 29th Dec 1938 | Box 150 \ 2 scan0191 | |
| Letter to Messrs. John Marston Ltd. confirming modifications for a Bentley V radiator unit. | 10th Jan 1939 | Box 150 \ 2 scan0192 | |
| Analysis and adoption of pressure cooling to lighten a chassis, with development work involving Marstons of Wolverhampton. | 13th Jan 1939 | Box 150 \ 2 scan0193 | |
| Investigation into the pros and cons of using Glycol or Pressure Water Cooling for car engines. | 5th Dec 1938 | Box 150 \ 2 scan0194 | |
| Specifications and considerations for Ethylene Glycol radiators and pressure cooling systems. | 6th Dec 1938 | Box 150 \ 2 scan0195 | |
| Engine cooling systems, covering radiator reliability, pressure cooling issues, and the use of Ethylene Glycol. | 5th Dec 1938 | Box 150 \ 2 scan0196 | |
| Engine detonation tests comparing water and glycol coolants at various temperatures on a Bentley car. | 5th Dec 1938 | Box 150 \ 2 scan0197 | |
| Disadvantages of ethylene glycol cooling and proposing the development of a pressure cooling system. | 5th Dec 1938 | Box 150 \ 2 scan0198 | |
| Letter to supplier John Marston Ltd. providing updated drawings for Bentley V radiator and other components. | 14th Jan 1939 | Box 150 \ 2 scan0199 | |
| Letter to supplier John Marston Ltd. regarding modified drawings for Bentley V radiator parts. | 21th Jan 1939 | Box 150 \ 2 scan0200 | |
| Letter to C.S. Steadman of John Marston Ltd. regarding orders for a Matrix unit and shell. | 9th Feb 1939 | Box 150 \ 2 scan0201 | |
| Additional order for reconditioning a radiator shell. | 9th Feb 1939 | Box 150 \ 2 scan0202 | |
| The return of a radiator matrix and yoke from chassis 14.B.V. to John Marston Ltd. for modification. | 15th Feb 1939 | Box 150 \ 2 scan0203 | |
| Letter to John Marsten Ltd. enclosing prints for a Bentley V Radiator and Phantom III Rig Engine. | 16th Feb 1939 | Box 150 \ 2 scan0204 | |
| Letter enclosing a Bentley 38 radiator specification for Messrs. John Marston Ltd. | 17th Feb 1939 | Box 150 \ 2 scan0205 | |
| Letter from John Marston Ltd discussing silencers, car heaters, radiators, and requesting further drawings. | 17th Feb 1939 | Box 150 \ 2 scan0206 | |
| Letter from HN Marston Ltd. regarding a missing order for a Bentley 5 Radiator and a request for instructions for a B.38 unit. | 17th Feb 1939 | Box 150 \ 2 scan0207 | |
| Overheating engine complaint for chassis number 3-AX-167, involving the replacement of a radiator matrix. | 20th Feb 1939 | Box 150 \ 2 scan0208 | |
| Letter to John Marston Ltd. enclosing revised prints for a B.V. Radiator and B.50 Radiator Shell. | 21th Feb 1939 | Box 150 \ 2 scan0209 | |
| Letter to Messrs. J. Marston Ltd. regarding unavailable heater details. | 21th Feb 1939 | Box 150 \ 2 scan0210 | |
| Works order document for the repair of an R.C. Matrix for a 3-AX-167 aero engine. | 21th Feb 1939 | Box 150 \ 2 scan0211 | |
| The dispatch of blueprints for a Radiator Shutters Assembly to Messrs. Marstons Ltd. | 23th Feb 1939 | Box 150 \ 2 scan0212 | |
| Recommending the scrapping of a badly silted radiator matrix from chassis 3.AX.167. | 24th Feb 1939 | Box 150 \ 2 scan0213 | |
| New drawings and replacement parts for bonnet side fixings on the Bentley V. & 50 Chassis. | 27th Feb 1939 | Box 150 \ 2 scan0214 | |
| Letter to John Marston Ltd. clarifying a radiator order for chassis 12.B.V. by listing previous orders. | 1st Mar 1939 | Box 150 \ 2 scan0215 | |
| Letter to John Marston Ltd. regarding a radiator delivery discrepancy and enclosing updated prints. | 1st Mar 1939 | Box 150 \ 2 scan0216 | |
| Correspondence to John Marston Ltd. regarding prints and production of car heaters. | 8th Mar 1939 | Box 150 \ 2 scan0217 | |
| Letter from John Marston Limited confirming the supply of parts for 6 car heaters, noting exceptions and requesting parts from Rolls Royce. | 10th Mar 1939 | Box 150 \ 2 scan0218 | |
| Letter from John Marston Ltd. concerning the supply and modification of radiators for various car models. | 10th Mar 1939 | Box 150 \ 2 scan0219 | |
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