| Description | Date | Identifier | |
| Letter to a supplier regarding wear issues with experimental thrust washers for a water pump. | 22th May 1939 | Box 149a \ 1 scan0338 | |
| Letter to The Morgan Crucible Co, Ltd. regarding manufacturing difficulties with sealing washers and inserting a brass peg for drawing EXS.1021. | 22th May 1939 | Box 149a \ 1 scan0339 | |
| Quotation from Ellison Insulations for Whale Brand Tufnol sealing washers and rod. | 24th May 1939 | Box 149a \ 1 scan0340 | |
| Letter concerning the failure analysis of an experimental Oilite Thrust Washer for a water pump. | 25th May 1939 | Box 149a \ 1 scan0341 | |
| Letter from The Manganese Bronze & Brass Co. Ltd. regarding the supply and manufacturing process of specific metal washers. | 25th May 1939 | Box 149a \ 1 scan0342 | |
| Letter from The Morgan Crucible Company Limited regarding the manufacture and supply of sample carbon rings for experiments. | 30th May 1939 | Box 149a \ 1 scan0343 | |
| Requesting an official order for four water pump gland washers from the Manganese Bronze & Brass Co. Ltd. | 31th May 1939 | Box 149a \ 1 scan0344 | |
| Requesting an official order for Sealing Gland Washers be sent to Ellison Insulations Ltd. | 2nd Jun 1939 | Box 149a \ 1 scan0345 | |
| Letter from the Experimental Department to Ellison Insulations Ltd. requesting four sealing washers. | 2nd Jun 1939 | Box 149a \ 1 scan0346 | |
| Letter to Messrs. Ellison Insulations Ltd. requesting four sealing washers. | 2nd Jun 1939 | Box 149a \ 1 scan0347 | |
| Requesting an official order for four water pump gland washers from The Morgan Crucible Co. Ltd. | 2nd Jun 1939 | Box 149a \ 1 scan0348 | |
| Requesting a redesign of the B.60 water pump to accommodate a fan drive and stronger bearings. | 12th Jun 1939 | Box 149a \ 1 scan0349 | |
| Letter from The Manganese Bronze & Brass Company Ltd. regarding the dispatch of sample washers. | 13th Jun 1939 | Box 149a \ 1 scan0350 | |
| Two 'oilite' gland washers for Vauxhall type pumps. | 14th Jun 1939 | Box 149a \ 1 scan0351 | |
| Letter to Skefco Ball Bearing Co. Ltd. concerning a failed bearing race removed from a water pump. | 15th Jun 1939 | Box 149a \ 1 scan0352 | |
| Returned ball bearing be forwarded to the supplier, Skefco Ball Bearing Co. Ltd. | 15th Jun 1939 | Box 149a \ 1 scan0353 | |
| Letter from The Skefko Ball Bearing Co. Ltd. regarding a faulty water pump spindle bearing. | 19th Jun 1939 | Box 149a \ 1 scan0354 | |
| Request to forward one ball race to the Skefco Ball Bearing Co. Ltd. in Luton for inspection. | 21th Jun 1939 | Box 149a \ 1 scan0355 | |
| Letter to The Skefko Ball Bearing Co. Ltd. regarding the failure of ball races after 6,000 miles on an experimental car. | 21th Jun 1939 | Box 149a \ 1 scan0356 | |
| Requesting an official order for six thrust rings from Morgan Crucible Co.Ltd. | 21th Jun 1939 | Box 149a \ 1 scan0357 | |
| Letter to The Morgan Crucible Co. Ltd. regarding an urgent request for modified carbon thrust washers for testing. | 21th Jun 1939 | Box 149a \ 1 scan0358 | |
| Letter from The Morgan Crucible Company Limited regarding the supply and specifications of Carbon Glands, including a technical sketch. | 23th Jun 1939 | Box 149a \ 1 scan0359 | |
| Letter from SKEFKO Ball Bearing Company regarding the failure of water pump spindle bearings due to water ingress. | 27th Jun 1939 | Box 149a \ 1 scan0360 | |
| Letter from The Skefko Ball Bearing Co. Ltd. regarding experiments with greases and spindle design modifications. | 26th Jun 1939 | Box 149a \ 1 scan0361 | |
| Drawing of a double row ball bearing spindle assembly. | 28th Apr 1939 | Box 149a \ 1 scan0362 | |
| Cross-sectional drawing of the bearings for a fan and water pump assembly. | 15th Apr 1939 | Box 149a \ 1 scan0363 | |
| Correspondence with The Morgan Crucible Co. Ltd. regarding washers, rings, and a request for quotation on further parts. | 29th Jun 1939 | Box 149a \ 1 scan0364 | |
| Official order for three bearings from Skefco Ball Bearing Co. Ltd. | 29th Jun 1939 | Box 149a \ 1 scan0365 | |
| Letter to a ball bearing supplier discussing design issues and requesting samples for testing. | 29th Jun 1939 | Box 149a \ 1 scan0366 | |
| Requesting an official order for belts, to be marked for the attention of Mr. Shilton. | 1st Apr 1941 | Box 149a \ 1 scan0367 | |
| Letter to a radiator manufacturer requesting the construction of a custom radiator for an experimental car. | 12th Jan 1932 | Box 149a \ 2 scan0001 | |
| Letter from Orme, Evans & Company Limited declining to tender for radiators as they have discontinued that branch of business. | 13th Jan 1932 | Box 149a \ 2 scan0002 | |
| Manufacture of a new Copper Film type radiator block, comparing specifications and pricing to the existing standard. | 27th Jan 1932 | Box 149a \ 2 scan0003 | |
| Construction and repair methods for Harrison type film radiator blocks. | 1st Feb 1932 | Box 149a \ 2 scan0004 | |
| Letter from John Marston Limited regarding the adaptation and re-construction of a Harrison type film radiator block. | 11th Feb 1932 | Box 149a \ 2 scan0005 | |
| Letter to John Marston Ltd. regarding water flow tests for a radiator. | 12th Feb 1932 | Box 149a \ 2 scan0006 | |
| Letter to John Marston Ltd. regarding water flow specifications for a 20/25 HP car radiator. | 17th Feb 1932 | Box 149a \ 2 scan0007 | |
| Graph showing water flow through the bottom water pipe versus engine RPM for a 20/25 HP engine with a standard dropped radiator. | 4th Apr 1932 | Box 149a \ 2 scan0008 | |
| Letter to John Marston Limited regarding a Harrison Film type Radiator and testing of a new sample block. | 4th Apr 1932 | Box 149a \ 2 scan0009 | |
| Arranging a meeting with John Marston Ltd to discuss the Harrison film type radiator. | 5th Apr 1932 | Box 149a \ 2 scan0010 | |
| Follow-up letter to John Marston Ltd. regarding progress on a radiator block and requesting matrix samples for testing. | 3rd May 1932 | Box 149a \ 2 scan0011 | |
| Letter from John Marston Ltd. regarding the supply and modification of radiator blocks and cases. | 4th May 1932 | Box 149a \ 2 scan0012 | |
| Correspondence to John Marston Ltd. regarding multiple leaks found in a film type radiator during testing on a bumping rig. | 5th May 1932 | Box 149a \ 2 scan0013 | |
| Letter to John Marston Ltd. regarding radiator delivery, shells, blocks, and mounting suitability for specific car models. | 6th May 1932 | Box 149a \ 2 scan0014 | |
| Letter from John Marston Limited acknowledging a report on a film type radiator test. | 6th May 1932 | Box 149a \ 2 scan0015 | |
| Letter to John Marston Ltd. confirming the completion and dispatch of radiator shells and a matrix block. | 18th May 1932 | Box 149a \ 2 scan0016 | |
| Letter from John Marston Ltd confirming receipt of the special Harrison core, enabling them to proceed with the radiators. | 19th May 1932 | Box 149a \ 2 scan0017 | |
| Disadvantages of using greased paper to protect radiators and recommending the practice be discontinued. | 4th Jun 1932 | Box 149a \ 2 scan0018 | |
| Letter from Harrison Radiator Corporation discussing comparative efficiencies of radiator cores. | 6th Jun 1932 | Box 149a \ 2 scan0019 | |
| Performance data comparison for three different radiator core configurations under specific temperature and waterflow conditions. | 6th Feb 1932 | Box 149a \ 2 scan0020 | |
| Dispatch of a Tube Block, Harrison Block, and another block made from copper strip. | 9th Jun 1932 | Box 149a \ 2 scan0021 | |
| Letter to the Harrison Radiator Corporation regarding radiator tests and performance data clarification. | 27th Jun 1932 | Box 149a \ 2 scan0022 | |
| Test report comparing the cooling performance of American Harrison Film and Marston Mark III radiator matrices against the standard hexagon matrix. | 29th Jun 1932 | Box 149a \ 2 scan0023 | |
| Comparison of radiator matrix cooling performance under different driving conditions and notes on matrix design. | 29th Jun 1932 | Box 149a \ 2 scan0024 | |
| Performance data comparing a standard carburettor with a semi-expanding carburettor on a 22-EX vehicle. | 1st Jul 1932 | Box 149a \ 2 scan0025 | |
| Letter to John Marston Ltd. regarding the testing and efficiency of different radiator blocks. | 1st Jul 1932 | Box 149a \ 2 scan0026 | |
| Letter from John Marston Ltd concerning test results for sample radiators and arranging a follow-up meeting. | 4th Jul 1932 | Box 149a \ 2 scan0027 | |
| Radiator tests, comparing the improvement of strip type radiators over the honeycomb type. | 4th Jul 1932 | Box 149a \ 2 scan0028 | |
| Comparative test report on three types of radiators for a 20/25HP car at Brooklands. | 2nd Jul 1932 | Box 149a \ 2 scan0029 | |
| Radiator water temperature test results under different driving conditions and shutter positions. | 2nd Jul 1932 | Box 149a \ 2 scan0030 | |
| Report comparing the performance of different radiator types, specifically the Marston Mark III and Harrison matrices. | 2nd Jul 1932 | Box 149a \ 2 scan0031 | |
| 'all out' tests detailing issues with fan belts, and performance tests on spark plugs and silencers. | 2nd Jul 1932 | Box 149a \ 2 scan0032 | |
| Comparative tests of a Colt Fan against the company's own fan on a Phantom II car. | 6th Jul 1932 | Box 149a \ 2 scan0033 | |
| Comparative radiator tests, detailing the weights of different models and discussing manufacturing possibilities. | 6th Jul 1932 | Box 149a \ 2 scan0034 | |
| Sample piece of a radiator built from bent strips for comparison with the Harrison radiator. | 7th Jul 1932 | Box 149a \ 2 scan0035 | |
| Comparing a Harrison radiator matrix with another type, discussing construction principles, heat transfer, and weight savings. | 7th Jul 1932 | Box 149a \ 2 scan0036 | |
| Requesting the despatch of two radiator matrix samples to Mr. Northey at Conduit St. | 7th Jul 1932 | Box 149a \ 2 scan0037 | |
| Letter from John Marston Limited concerning the dimensions and design considerations for Harrison type radiators. | 11th Jul 1932 | Box 149a \ 2 scan0038 | |
| Second page of a typed letter addressed to West Wittering. | 11th Jul 1932 | Box 149a \ 2 scan0039 | |
| Letter to John Marston & Co. Ltd. requesting particulars of Harrison ribbon type radiator tubes. | 7th Jul 1932 | Box 149a \ 2 scan0040 | |
| Letter from Harrison Radiator Corporation clarifying the interpretation of airflow cooling radiator data. | 11th Jul 1932 | Box 149a \ 2 scan0041 | |
| Return of a piece from a Harrison radiator. | 12th Jul 1932 | Box 149a \ 2 scan0042 | |
| Letter to John Marston Ltd. regarding the supply and specifications for Harrison bonded core radiator blocks. | 13th Jul 1932 | Box 149a \ 2 scan0043 | |
| Dimensional drawing for a Harrison bonded core experimental radiator, showing the matrix size and starting handle tunnel position. | 14th Jul 1932 | Box 149a \ 2 scan0044 | |
| Letter from John Marston Ltd. acknowledging an order for two Harrison Bonded Core Radiator Blocks. | 14th Jul 1932 | Box 149a \ 2 scan0045 | |
| Request to place an official order with John Marston Ltd. for two Harrison Bonded Core Radiator Blocks for Peregrine. | 15th Jul 1932 | Box 149a \ 2 scan0046 | |
| Special light alloy petrol and oil tanks being made by the Gallay Radiator Company. | 19th Jul 1932 | Box 149a \ 2 scan0047 | |
| Letter to Harrison Radiator Corp. regarding performance tests on a new radiator matrix. | 25th Jul 1932 | Box 149a \ 2 scan0048 | |
| Letter to John Marsden Ltd. enquiring about the earliest production date for the new Harrison type Radiator Core. | 25th Jul 1932 | Box 149a \ 2 scan0049 | |
| Letter concerning negotiations for the production of a new Harrison Radiator Core. | 26th Jul 1932 | Box 149a \ 2 scan0050 | |
| Letter from Gallay Radiator Co. Ltd. regarding the advantages of their 'Gallay' system of tube block for radiators and tanks. | 4th Aug 1932 | Box 149a \ 2 scan0051 | |
| Synopsis of a report on the performance and specifications of Gallay radiator sections for aircraft engines. | 4th Aug 1932 | Box 149a \ 2 scan0052 | |
| Wind tunnel test report on Gallay radiators fitted to a 200 HP Hispano Suiza engine on a 'Dolphin' Machine. | 4th Aug 1932 | Box 149a \ 2 scan0053 | |
| Comparison table of different radiator honeycomb designs and their performance metrics. | 8th Aug 1932 | Box 149a \ 2 scan0054 | |
| Modification of an order for Peregrine II radiator matrix tubes and blocks. | 8th Aug 1932 | Box 149a \ 2 scan0055 | |
| Bumper test report for a Harrison 25 HP radiator. | 8th Aug 1932 | Box 149a \ 2 scan0056 | |
| Letter to Gallay Radiator Co. Ltd. regarding the testing and efficiency of radiators. | 10th Aug 1932 | Box 149a \ 2 scan0057 | |
| Typed note to Mr. Dallman asking to identify the source of an enquiry for ROY. | 12th Aug 1932 | Box 149a \ 2 scan0058 | |
| Letter from Gallay Radiator Co. Ltd. proposing comparative testing conditions for their radiator blocks. | 12th Aug 1932 | Box 149a \ 2 scan0059 | |
| Page 2 of a letter from Gallay Radiator Co. Ltd. detailing their 'Hercule' thermostat and tube blocks. | 15th Aug 1932 | Box 149a \ 2 scan0060 | |
| Letter to supplier John Marston Ltd. regarding radiator thickness, starting handle block, and material choice. | 15th Aug 1932 | Box 149a \ 2 scan0061 | |
| Letter from John Marston Limited regarding a sketch for starting handle blocks. | 17th Aug 1932 | Box 149a \ 2 scan0062 | |
| Sketch showing the method of fitting a starting tube to a block. | 18th Aug 1932 | Box 149a \ 2 scan0063 | |
| Letter to John Marston Ltd. confirming the satisfactory method for fitting a starting tube. | 18th Aug 1932 | Box 149a \ 2 scan0064 | |
| Letter from John Marston Limited acknowledging approval of a sketch for fitting starting tubes. | 19th Aug 1932 | Box 149a \ 2 scan0065 | |
| Letter to John Marston Limited confirming the satisfactory despatch of blocks. | 22th Aug 1932 | Box 149a \ 2 scan0066 | |
| Letter from Gallay Radiator Co. Ltd. following up on a meeting about a new thermostat design. | 23th Aug 1932 | Box 149a \ 2 scan0067 | |
| Letter recommending the study of Chausson Gallay radiator blocks and the 'Hercule' Thermostat. | 26th Aug 1932 | Box 149a \ 2 scan0068 | |
| Letter from Gallay Radiator Co. Ltd. requesting thermostat operating temperature specifications. | 1st Sep 1932 | Box 149a \ 2 scan0069 | |
| Follow-up letter to Gallay Radiator Co. Ltd. regarding tests on the 'Hercule' thermostat. | 12th Sep 1932 | Box 149a \ 2 scan0070 | |
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