| Description | Date | Identifier | |
| Inquiry to The Leyland & Birmingham Rubber Co. Ltd. regarding the feasibility and price of a custom rubber hose connection. | 9th Feb 1938 | Box 150 \ 3 scan0342 | |
| Letter from Pulp Industries Limited acknowledging receipt of a letter and blueprint, and confirming they will provide a sample and quotation. | 9th Feb 1938 | Box 150 \ 3 scan0343 | |
| Letter to John Marston Ltd. enclosing prints for Wraith components and confirming a previous dispatch about a Bentley III radiator. | 10th Feb 1938 | Box 150 \ 3 scan0344 | |
| Letter from a supplier requesting a drawing or sample of a radiator tank to arrange their dipping frame. | 10th Feb 1938 | Box 150 \ 3 scan0345 | |
| Letter from The Leyland & Birmingham Rubber Co. regarding the cost of manufacturing a specific rubber hose connection. | 10th Feb 1938 | Box 150 \ 3 scan0346 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding the cost and details of a special hose connection. | 11th Feb 1938 | Box 150 \ 3 scan0347 | |
| Letter from Pulp Industries Limited regarding an inability to mould an article from blueprint No. EX.S.348. | 11th Feb 1938 | Box 150 \ 3 scan0348 | |
| Comparing the costs of B.III and B.II radiator matrices. | 12th Feb 1938 | Box 150 \ 3 scan0349 | |
| Letter to Pulp Industries Ltd. regarding the unsuitability of material samples. | 14th Feb 1938 | Box 150 \ 3 scan0350 | |
| Sending five sample fibre moulded cups to the Central Stores for return to the supplier. | 15th Feb 1938 | Box 150 \ 3 scan0351 | |
| The approval and modification of a Wraith bottom water connection. | 16th Feb 1938 | Box 150 \ 3 scan0352 | |
| Letter from The Leyland & Birmingham Rubber Co Ltd concerning pricing for a hose connection. | 16th Feb 1938 | Box 150 \ 3 scan0353 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. concerning modifications to hose connections. | 17th Feb 1938 | Box 150 \ 3 scan0354 | |
| Letter discussing the design, manufacturing feasibility, and cost of a hose connection. | 17th Feb 1938 | Box 150 \ 3 scan0355 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding a revised drawing and an order for connections. | 19th Feb 1938 | Box 150 \ 3 scan0356 | |
| Letter from a rubber manufacturer discussing modifications and production difficulties for hose connections. | 19th Feb 1938 | Box 150 \ 3 scan0357 | |
| Letter clarifying production capabilities and plant charges for a 'T' section hose. | 19th Feb 1938 | Box 150 \ 3 scan0358 | |
| Personal letter from Paddon Brothers Ltd about testing 'scale-buoys' for treating hard water. | 21th Feb 1938 | Box 150 \ 3 scan0359 | |
| Investigation into the corrosion of aluminium components in the Phantom III engine's cooling system. | 21th Feb 1938 | Box 150 \ 3 scan0360 | |
| Corrosion tests in cooling systems, detailing trials on a new engine and a corrosion inhibitor. | 21th Feb 1938 | Box 150 \ 3 scan0361 | |
| Examination and conclusion from tests on water jacket corrosion in various experimental cars. | 21th Feb 1938 | Box 150 \ 3 scan0362 | |
| Minimizing corrosion in engine cooling systems, discussing causes on Ph.III cars and solutions like anodic oxidation. | 21th Feb 1938 | Box 150 \ 3 scan0363 | |
| The effectiveness of a corrosion inhibitor and strategies for managing corrosion in water systems with mixed iron and aluminium parts. | 21th Feb 1938 | Box 150 \ 3 scan0364 | |
| Summary of corrosion test rig results for different engine configurations and treatments. | 21th Feb 1938 | Box 150 \ 3 scan0365 | |
| Table detailing corrosion observations on experimental cars under various test conditions. | 24th Jul 1937 | Box 150 \ 3 scan0366 | |
| Report from the National Physical Laboratory on a corrosion inhibitor test. | 24th Jul 1937 | Box 150 \ 3 scan0367 | |
| Photograph of an engine cylinder block showing corrosion or deposits inside the bores after a rig test. | 12th Sep 1933 | Box 150 \ 3 scan0368 | |
| Photograph of the 32-EX engine cylinder block after a 15,000-mile endurance test. | 12th Sep 1933 | Box 150 \ 3 scan0369 | |
| Material specifications and modification of water hose connections for all Wraith cars. | 22th Feb 1938 | Box 150 \ 3 scan0370 | |
| Revision of undersheets into two separate halves to protect the servo motor. | 25th Feb 1938 | Box 150 \ 3 scan0371 | |
| The change of water connection hoses from red to black on experimental and future cars. | 26th Feb 1938 | Box 150 \ 3 scan0372 | |
| Letter to John Marstons Ltd. regarding a disputed charge for a reconditioned oil cooler and other outstanding items. | 26th Feb 1938 | Box 150 \ 3 scan0373 | |
| Letter inquiring about the readiness of a car heater, a McCord block, and requesting the return of patent specifications. | 26th Feb 1938 | Box 150 \ 3 scan0374 | |
| Letter from The Stainless Spinning Works regarding a report on a Bakerlite Stopper for Hot Water Bottles. | 28th Feb 1938 | Box 150 \ 3 scan0375 | |
| User complaints about Bakelite stoppers for Hot Water Bottles leading to a change in material. | 1st Mar 1938 | Box 150 \ 3 scan0376 | |
| Letter to a supplier regarding material testing and failure of sample radiator filler caps. | 1st Mar 1938 | Box 150 \ 3 scan0377 | |
| Page 2 of a letter, with a postscript regarding a sample block for a filler cap. | 1st Mar 1938 | Box 150 \ 3 scan0378 | |
| Letter to The Avon India Rubber Co. Ltd. complaining about the poor quality of Neoprene washers after testing. | 1st Mar 1938 | Box 150 \ 3 scan0379 | |
| Inquiry to Daimler Motors regarding the performance of Bakelite oil filler caps under heat. | 1st Mar 1938 | Box 150 \ 3 scan0380 | |
| Letter to a supplier regarding the manufacturing process and tooling for a spun insert part. | 1st Mar 1938 | Box 150 \ 3 scan0381 | |
| Letter concerning the poor durability of sample radiator filler cap washers after testing. | 2nd Mar 1938 | Box 150 \ 3 scan0382 | |
| Inquiry to James Russell & Co. Ltd. about a water-resistant rubber compound called 'Waterfall' for sample washers and a valve insert. | 2nd Mar 1938 | Box 150 \ 3 scan0383 | |
| Letter to John Marston Ltd. regarding material specifications and awaiting quotations for a revised Bentley III radiator. | 2nd Mar 1938 | Box 150 \ 3 scan0384 | |
| Letter from Birkbys Ltd. regarding tender No. 6812 for Radiator Filler Caps, proposing a meeting to discuss the matter. | 2nd Mar 1938 | Box 150 \ 3 scan0385 | |
| Brief typed message to the Sales Manager in Liversedge concerning a meeting day. | 3rd Mar 1938 | Box 150 \ 3 scan0386 | |
| Telegram confirming an appointment for the following day. | 3rd Mar 1938 | Box 150 \ 3 scan0387 | |
| Letter from Birkbys Ltd. confirming an appointment arranged by telegram. | 3rd Mar 1938 | Box 150 \ 3 scan0388 | |
| Confirmation of a telegram arranging a meeting. | 3rd Mar 1938 | Box 150 \ 3 scan0389 | |
| Letter from James Russell & Co. (Newcastle) Ltd. acknowledging an enquiry for 'Waterfall' quality washers. | 5th Mar 1938 | Box 150 \ 3 scan0390 | |
| Letter from Birkbys Ltd. concerning an urgent matter about the form and size of a thread, requiring confirmation before cutters can be purchased. | 5th Mar 1938 | Box 150 \ 3 scan0391 | |
| Hand-drawn diagram of a component with detailed dimensions. | 8th Mar 1938 | Box 150 \ 3 scan0392 | |
| Letter from John Marston Ltd. enclosing blueprints with suggestions for the manufacture of a new Bentley Radiator. | 8th Mar 1938 | Box 150 \ 3 scan0393 | |
| Letter from John Marston Limited of Imperial Chemical Industries, returning patent specifications. | 8th Mar 1938 | Box 150 \ 3 scan0394 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding a quotation and an order for rubber hose. | 10th Mar 1938 | Box 150 \ 3 scan0395 | |
| Letter to Messrs. Birkbys Ltd. regarding design changes to a radiator filler plug drawing. | 9th Mar 1938 | Box 150 \ 3 scan0396 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. requesting a sample Tee rubber hose. | 11th Mar 1938 | Box 150 \ 3 scan0397 | |
| Letter from Birkbys Ltd regarding print E.W.1665 and a request to retain a turned plug for a moulding job. | 12th Mar 1938 | Box 150 \ 3 scan0398 | |
| Order for stainless steel balls for use in steam valves. | 14th Mar 1938 | Box 150 \ 3 scan0399 | |
| Letter from The Leyland & Birmingham Rubber Co Ltd confirming a satisfactory Defroster Hose sample and arranging dispatch of new lengths. | 14th Mar 1938 | Box 150 \ 3 scan0400 | |
| Letter from The Daimler Co. Ltd. regarding the satisfactory use of Bakelite moulded oil filler caps. | 15th Mar 1938 | Box 150 \ 3 scan0401 | |
| Letter confirming the manufacture of a 'T' type Hose Connection following receipt of the final blueprint. | 15th Mar 1938 | Box 150 \ 3 scan0402 | |
| Letter from supplier Birkbys Ltd highlighting discrepancies on a drawing for a moulded part and requesting corrected blueprints. | 15th Mar 1938 | Box 150 \ 3 scan0403 | |
| Letter to Messrs Birkbys Ltd. clarifying dimensions on a drawing for a moulded plug. | 18th Mar 1938 | Box 150 \ 3 scan0404 | |
| Letter discussing revised specifications for brass spinnings and issues with a master plug gauge. | 18th Mar 1938 | Box 150 \ 3 scan0405 | |
| To the Experimental Technical Department regarding the dimensional accuracy of two gauges for brass spinning. | 24th Mar 1938 | Box 150 \ 3 scan0406 | |
| Instructing the forwarding of a master plug gauge to The Stainless Spinning Co. Ltd. | 25th Mar 1938 | Box 150 \ 3 scan0407 | |
| Letter to John Marston Ltd. regarding a scheme for a modified car heater. | 26th Mar 1938 | Box 150 \ 3 scan0408 | |
| Letter from Birbys Ltd. clarifying the shape and dimensions of an interior hexagon recess for order 58209. | 26th Mar 1938 | Box 150 \ 3 scan0409 | |
| Letter to a supplier clarifying a drawing detail for a filler cap plug. | 28th Mar 1938 | Box 150 \ 3 scan0410 | |
| Letter to John Marston Ltd. confirming arrangements for the manufacture of two experimental Bentley radiator shells. | 29th Mar 1938 | Box 150 \ 3 scan0411 | |
| Letter to a supplier regarding the failure of a large diameter defroster hose and requesting a replacement or repair. | 31th Mar 1938 | Box 150 \ 3 scan0412 | |
| Letter from a supplier regarding a manufacturing discrepancy in a filler cap moulding. | 1st Apr 1938 | Box 150 \ 3 scan0413 | |
| Letter from a supplier regarding a complaint about the failure of Neoprene Filler Cap Washers and the dispatch of a replacement batch. | 1st Apr 1938 | Box 150 \ 3 scan0414 | |
| Communication regarding the shape of a .050' radius and the need for a new plug. | 2nd Apr 1938 | Box 150 \ 3 scan0415 | |
| Letter from a supplier regarding an unsatisfactory flexible car heater and defroster hose due to collapsed internal wiring. | 4th Apr 1938 | Box 150 \ 3 scan0416 | |
| Letter concerning an order with J. Marston Ltd., querying an invoice for £21/4/9d for a Bentley Matrix and Dummy Shutters. | 7th Apr 1938 | Box 150 \ 3 scan0417 | |
| Dispatch note from John Marston Ltd. for a Bentley Radiator and a tinned Copper Matrix. | 1st Sep 1937 | Box 150 \ 3 scan0418 | |
| From John Marston Ltd. regarding one set of modified Bentley Shutters. | 9th Dec 1937 | Box 150 \ 3 scan0419 | |
| Note from John Marston Ltd. regarding a complete set of Bentley Dummy Shutters C.P. | 23th Oct 1937 | Box 150 \ 3 scan0420 | |
| Works note from John Marston Ltd. regarding a Bentley Radiator, noting a new stiffener and damage on receipt. | 22th Jul 1937 | Box 150 \ 3 scan0421 | |
| Letter to John Marston Ltd. regarding prints for a Bentley radiator, alterations to a scheme, and an order for oil coolers. | 11th Apr 1938 | Box 150 \ 3 scan0422 | |
| Letter to a supplier providing feedback on a sample 'Tee' hose connection. | 11th Apr 1938 | Box 150 \ 3 scan0423 | |
| Letter to a supplier regarding an invoice for a sample radiator and requesting confirmation of oil cooler delivery schedules. | 12th Apr 1938 | Box 150 \ 3 scan0424 | |
| Letter from Leyland & Birmingham Rubber Co Ltd regarding an unsatisfactory sample tee hose connection and arrangements for a replacement. | 14th Apr 1938 | Box 150 \ 3 scan0425 | |
| Letter from S. Smith & Sons discussing the use of potassium dichromate as a corrosion inhibitor in engine cooling systems. | 14th Apr 1938 | Box 150 \ 3 scan0426 | |
| Letter discussing the examination of a corroded cylinder head and the potential cause being an electro-couple effect. | 14th Apr 1938 | Box 150 \ 3 scan0427 | |
| Letter to J. Marston Ltd. regarding work on a Bentley 50 radiator and shell, including costs and shipping instructions. | 14th Apr 1938 | Box 150 \ 3 scan0428 | |
| Letter to a supplier questioning a significant price increase for a tee hose connection. | 20th Apr 1938 | Box 150 \ 3 scan0429 | |
| Telegram regarding the collection of a radiator shell arriving at St. Pancras station. | 21th Apr 1938 | Box 150 \ 3 scan0430 | |
| Letter from a supplier regarding the supply of tee hose connection samples and production difficulties. | 21th Apr 1938 | Box 150 \ 3 scan0431 | |
| Letter to John Marston Ltd. regarding a Bentley 50 shell and grille, and other related components. | 23th Apr 1938 | Box 150 \ 3 scan0432 | |
| Letter to Mr. Blomeley of Clayton Dewandre Ltd., enclosing a paper on Automobile cooling. | 23th Apr 1938 | Box 150 \ 3 scan0433 | |
| Letter from The Leyland & Birmingham Rubber Co. Ltd declining to reduce their price for Hose Connections Part No. EB.3748. | 23th Apr 1938 | Box 150 \ 3 scan0434 | |
| Letter from John Marston Limited regarding a paper on Automobile Cooling and modifications to a radiator unit. | 25th Apr 1938 | Box 150 \ 3 scan0435 | |
| Letter to The Leyland & Birmingham Rubber Co. Ltd. regarding a quotation and cost estimation for hose connections. | 26th Apr 1938 | Box 150 \ 3 scan0436 | |
| Requesting a cost comparison between a special rubber hose bottom water connection and a proposed copper pipe alternative. | 26th Apr 1938 | Box 150 \ 3 scan0437 | |
| Request to send an official order for two water hose connections to The Leyland & Birmingham Rubber Co. Ltd. | 26th Apr 1938 | Box 150 \ 3 scan0438 | |
| Letter to a supplier regarding incorrectly sized washers and enclosing a revised drawing. | 26th Apr 1938 | Box 150 \ 3 scan0439 | |
| Incorrect sample washers received from The Avon Rubber Co. Ltd. and a request to place an official order for replacements. | 26th Apr 1938 | Box 150 \ 3 scan0440 | |
| Letter to a supplier regarding incorrectly sized washers and requesting replacements based on a revised drawing. | 26th Apr 1938 | Box 150 \ 3 scan0441 | |
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