| Description | Date | Identifier | |
| Letter from General Motors' Inland Manufacturing Division regarding the testing, development and supply of new Inlox Bushings. | 31th Jan 1938 | Box 154 \ 2 scan0068 | |
| Price reduction for Wraith body mounting 'floatex units' from supplier Silentbloc. | 1st Feb 1938 | Box 154 \ 2 scan0069 | |
| Request for a covering order to be sent to Silentbloc Ltd. for 24 bushes that have been received. | 18th Feb 1938 | Box 154 \ 2 scan0070 | |
| The manufacturing of rectangular ended springs for independent suspension. | 19th Feb 1938 | Box 154 \ 2 scan0071 | |
| Letter to Silentbloc Ltd. concerning the supply of floatex units and a delay in testing new bushes due to a chassis frame failure. | 21th Feb 1938 | Box 154 \ 2 scan0072 | |
| Letter from Inland Manufacturing Division regarding the shipment of new Inlox bushings with assembly prints. | 22th Feb 1938 | Box 154 \ 2 scan0073 | |
| Blueprint for an inner pin assembly for a wheel front support arm. | 20th Jan 1938 | Box 154 \ 2 scan0074 | |
| Drawing of an upper bushing assembly for a wheel front support. | 18th Jan 1938 | Box 154 \ 2 scan0075 | |
| Load deflection and twist test curves for an experimental bushing, part number 8456. | 21th Feb 1938 | Box 154 \ 2 scan0076 | |
| Load deflection and twist test curves for experimental bushing part no. 8404. | 21th Feb 1938 | Box 154 \ 2 scan0077 | |
| Letter from Silentbloc enclosing drawings IS.9012 for the 20/25HP and IS.9006B for an Armstrong Siddeley. | 23th Feb 1938 | Box 154 \ 2 scan0078 | |
| Letter to Messrs. Firth & Brown Ltd. confirming the use of a double rivetted lubricator for springs. | 7th Mar 1938 | Box 154 \ 2 scan0079 | |
| Letter to General Motors inquiring about the cost and design choices for a new 'Inlox' bush. | 7th Mar 1938 | Box 154 \ 2 scan0080 | |
| Letter to Messrs Daimler & Co. Ltd. enquiring about the cost of steel casting work. | 10th Mar 1938 | Box 154 \ 2 scan0081 | |
| Shipping ticket from the Inland Manufacturing Division for wheel front support components. | 18th Feb 1938 | Box 154 \ 2 scan0082 | |
| Covering order be sent to British Tyre & Rubber Co. Ltd. for received rubbers. | 21th Mar 1938 | Box 154 \ 2 scan0083 | |
| Letter from General Motors regarding new type Inlox Bushings and a comparison with Packard's torque arms. | 22th Mar 1938 | Box 154 \ 2 scan0084 | |
| Request to produce shafts and collars for serration tests on a shaft to lever attachment. | 24th Mar 1938 | Box 154 \ 2 scan0085 | |
| Letter from Inland Manufacturing Division regarding the inability to supply Inlox Bushings due to licensing restrictions. | 28th Mar 1938 | Box 154 \ 2 scan0086 | |
| Letter to Belgrave Engineering Co. regarding cracked inlet valves. | 30th Mar 1938 | Box 154 \ 2 scan0087 | |
| Letter to Toledo Woodhead Springs Ltd. requesting samples and a quotation for road springs. | 31th Mar 1938 | Box 154 \ 2 scan0088 | |
| Letter from Toledo Woodhead Springs Ltd. acknowledging an enquiry for Road Springs. | 1st Apr 1938 | Box 154 \ 2 scan0089 | |
| Request to Messrs Thomas Firth & John Brown Ltd. for a drawing of springs to a specific drawing number and load. | 8th Apr 1938 | Box 154 \ 2 scan0090 | |
| Request to manufacture 12 mild steel nipples based on an attached sketch. | 4th May 1938 | Box 154 \ 2 scan0091 | |
| New thread pin and bush design to replace the 'Silentbloc' in the rear spring front anchorage for Bentley Lll and 50 models. | 10th May 1938 | Box 154 \ 2 scan0092 | |
| Letter to English Steel Corporation Ltd. regarding a laboratory report on decarburisation issues found in front coil springs. | 12th May 1938 | Box 154 \ 2 scan0093 | |
| Covering order be sent to Silentbloc for rubber bushes. | 17th May 1938 | Box 154 \ 2 scan0094 | |
| Letter to Silentbloc Ltd. concerning structural alterations and testing of suspension bushes. | 17th May 1938 | Box 154 \ 2 scan0095 | |
| Suspension improvements for Bentley III and 50 models, focusing on spring ratings, dampers, and the addition of a front roll rod. | 19th May 1938 | Box 154 \ 2 scan0096 | |
| Follow-up letter from Simmonds Aerocessories Ltd. concerning an order for Simmonds Nuts. | 19th May 1938 | Box 154 \ 2 scan0097 | |
| Confirming a phone order for 24 gland rubbers from The British Tyre and Rubber Co. Ltd. | 24th May 1938 | Box 154 \ 2 scan0098 | |
| Blueprint for the Andre-Girling suspension system for an Armstrong Siddeley Long 20/25 HP vehicle. | 24th May 1938 | Box 154 \ 2 scan0099 | |
| Multi-view schematic of a Gordon Armstrong suspension unit. | 1st Nov 1933 | Box 154 \ 2 scan0100 | |
| Blueprint of an independent suspension system suggestion for an Austin 16-18 HP. | 1st Nov 1933 | Box 154 \ 2 scan0101 | |
| Letter to the English Steel Corporation regarding the decarburization of coil springs for car suspension. | 15th Jun 1938 | Box 154 \ 2 scan0102 | |
| Letter from a supplier confirming the despatch time for an order of Silico Manganese Steel Rear Springs. | 17th Jun 1938 | Box 154 \ 2 scan0103 | |
| The order of Lockheed Telescopic Wheel Cylinders. | 20th Jun 1938 | Box 154 \ 2 scan0104 | |
| Official order to be sent for Gaco Seals. | 24th Jun 1938 | Box 154 \ 2 scan0105 | |
| Telegram requesting the dispatch of three Gaco oil seals of varying sizes. | 24th Jun 1938 | Box 154 \ 2 scan0106 | |
| Urgent request for three Gaco seals from George Angus & Co. after a leather seal failed during a dynamometer test. | 24th Jun 1938 | Box 154 \ 2 scan0107 | |
| Letter from George Angus & Co Ltd confirming an order for 3 Angus Oil Seals and advising of a production delay due to holidays. | 24th Jun 1938 | Box 154 \ 2 scan0108 | |
| Superior quality of Woodhead Toledo road spring plates, noting their reduced decarburisation and suggesting further experiments. | 7th Jul 1938 | Box 154 \ 2 scan0109 | |
| Letter to a supplier regarding the decarburisation of road springs. | 14th Jul 1938 | Box 154 \ 2 scan0110 | |
| Letter to Toledo Woodhead Springs Ltd. concerning the elimination of decarburisation in spring manufacturing using a cyanide bath. | 14th Jul 1938 | Box 154 \ 2 scan0111 | |
| Letter to Toledo Woodhead Springs Ltd. regarding methods for improving spring endurance and corrosion resistance. | 14th Jul 1938 | Box 154 \ 2 scan0112 | |
| Letter to a spring manufacturer detailing a steel oxidisation process for corrosion resistance. | 14th Jul 1938 | Box 154 \ 2 scan0113 | |
| Letter to a supplier with suggestions for the more economical production of road springs, focusing on avoiding grinding and plating. | 14th Jul 1938 | Box 154 \ 2 scan0114 | |
| Metallurgical treatments for steel, including cyanide baths for springs and steam oxidation for corrosion resistance. | 14th Jul 1938 | Box 154 \ 2 scan0115 | |
| Letter to Messrs. Thos. Firth & John Brown Ltd. discussing methods of corrosion protection for springs. | 14th Jul 1938 | Box 154 \ 2 scan0116 | |
| Letter to Toledo Woodhead Springs discussing methods for producing and protecting road springs from corrosion. | 15th Jul 1938 | Box 154 \ 2 scan0117 | |
| Letter to Toledo Woodhead Springs Ltd. about protecting a spring plate against corrosion. | 15th Jul 1938 | Box 154 \ 2 scan0118 | |
| Letter to Thos. Firth & John Brown Ltd. discussing methods for preventing corrosion on road springs. | 15th Jul 1938 | Box 154 \ 2 scan0119 | |
| Page 2 of a letter to Thos. Firth & John Brown Ltd. regarding the corrosion protection of a spring plate. | 15th Jul 1938 | Box 154 \ 2 scan0120 | |
| Proposals with various companies to produce cheaper and improved road springs, free from de-carburisation and corrosion. | 4th Aug 1938 | Box 154 \ 2 scan0121 | |
| Copy of a letter discussing an experimental course on the decarburisation of spring plates. | 27th Jul 1938 | Box 154 \ 2 scan0122 | |
| Modifications to rear spring bushes for Bentley and Wraith models. | 11th Aug 1938 | Box 154 \ 2 scan0123 | |
| Letter from the Experimental Department to Metalastik Ltd. regarding a rubber bush drawing and engine suspensions. | 15th Aug 1938 | Box 154 \ 2 scan0124 | |
| Letter from Metalastik Ltd requesting a sketch for an engine suspension mounting. | 16th Aug 1938 | Box 154 \ 2 scan0125 | |
| Scheme for a lower triangle thrust stay for the front wheel suspension. | 16th Aug 1938 | Box 154 \ 2 scan0126 | |
| Decision on 7' static deflection rear springs for the B.50 and Wraith 60 models. | 17th Aug 1938 | Box 154 \ 2 scan0127 | |
| Letter to Metalastik Ltd. regarding an engine mounting made of vulcanized metal and rubber. | 20th Aug 1938 | Box 154 \ 2 scan0128 | |
| Letter to Toledo Woodhead Springs Ltd. inquiring about variable rate leaf springs for new cars. | 23th Aug 1938 | Box 154 \ 2 scan0129 | |
| Letter from Toledo Woodhead Springs Ltd. regarding the design of sample springs, specifically a strengthened cotton tongue interleaving. | 24th Aug 1938 | Box 154 \ 2 scan0130 | |
| Letter to the English Steel Corporation regarding the testing and treatment of helical road springs. | 24th Aug 1938 | Box 154 \ 2 scan0131 | |
| Letter from Toledo Woodhead Springs Limited acknowledging a letter regarding Variable Rate Leaf Springs. | 26th Aug 1938 | Box 154 \ 2 scan0132 | |
| Letter from English Steel Corporation Ltd. confirming satisfactory tests on springs FB.3826 and the upcoming treatment for springs FB.3947. | 27th Aug 1938 | Box 154 \ 2 scan0133 | |
| Further testing on knurled bushes for the rear springs of Bentley and Wraith models. | 25th Aug 1938 | Box 154 \ 2 scan0134 | |
| Alteration note specifying springs to be shot-blasted and cadmium-plated to prevent rusting. | 29th Aug 1938 | Box 154 \ 2 scan0135 | |
| Letter from a supplier detailing the specifications for road springs. | 30th Aug 1938 | Box 154 \ 2 scan0136 | |
| Letter to Metalastik Ltd. regarding the 'Askania' vibrograph and engine mounting problems. | 2nd Sep 1938 | Box 154 \ 2 scan0137 | |
| Letter from Metalastik Ltd regarding the name of the Vibrograph and offering assistance with Engine Mountings. | 5th Sep 1938 | Box 154 \ 2 scan0138 | |
| Letter from Metalastik Ltd regarding an inquiry about a Vibrograph instrument and enclosing an Askania catalogue. | 7th Sep 1938 | Box 154 \ 2 scan0139 | |
| Instruction note to Mr Martindale for the D.O. to issue a covering order. | 7th Sep 1938 | Box 154 \ 2 scan0140 | |
| Advice of dispatch from Metalastik Ltd. for front engine mountings. | 8th Sep 1938 | Box 154 \ 2 scan0141 | |
| Letter discussing variable rate leaf spring technology and disagreements with the Leaf Spring Institute. | 8th Sep 1938 | Box 154 \ 2 scan0142 | |
| Technical analysis and comparison of variable rate and conventional leaf spring designs for the 1939 Pontiac. | 8th Sep 1938 | Box 154 \ 2 scan0143 | |
| The concluding page of a letter from Eaton Manufacturing Company regarding the confidential nature of the correspondence and a warning about competitor designs. | 8th Sep 1938 | Box 154 \ 2 scan0144 | |
| Official order for engine mountings from Metalastik Ltd. | 8th Sep 1938 | Box 154 \ 2 scan0145 | |
| Inquiry to Metalastik Ltd. about an adhesive for synthetic rubber in a shock damper. | 8th Sep 1938 | Box 154 \ 2 scan0146 | |
| Letter from Metalastik Ltd regarding a synthetic rubber gland for a shock damper. | 10th Sep 1938 | Box 154 \ 2 scan0147 | |
| Requesting an order for various types of springs for different chassis. | 15th Sep 1938 | Box 154 \ 2 scan0148 | |
| Order for eight silentbloc bushes for a Bentley III and 50 chassis. | 16th Sep 1933 | Box 154 \ 2 scan0149 | |
| Letter from Silentbloc Limited regarding their bearing catalogue and a specific part series for shock absorbers. | 17th Sep 1938 | Box 154 \ 2 scan0150 | |
| New scheme for front suspension lower triangle levers on Bentley 111 and 50 models. | 22th Sep 1938 | Box 154 \ 2 scan0151 | |
| Letter to a supplier regarding the return of a pair of springs for recambering to a specific drawing for testing. | 23th Sep 1938 | Box 154 \ 2 scan0152 | |
| Request to despatch a Wraith rear spring to Toledo Woodhead Springs for destructive testing. | 6th Oct 1938 | Box 154 \ 2 scan0153 | |
| New system for ordering, labelling, and fitting rear suspension leaf springs. | 13th Dec 1938 | Box 154 \ 2 scan0154 | |
| Spring fitting tolerances and the importance of poundage over piece numbers. | 13th Oct 1938 | Box 154 \ 2 scan0155 | |
| Letter from Toledo Woodhead Springs Limited confirming a telephone message regarding two pairs of Grooved Springs for order 71176. | 18th Oct 1938 | Box 154 \ 2 scan0156 | |
| Letter to supplier Metalastik Ltd. requesting criticism of a drawing and a price for ring type bump buffers. | 28th Oct 1938 | Box 154 \ 2 scan0157 | |
| Letter from Metalastik Ltd acknowledging receipt of a letter and drawing concerning Spring Aids. | 29th Oct 1938 | Box 154 \ 2 scan0158 | |
| Letter to Metalastik Ltd. requesting a price quote for making 4 bearings to drawing SCD.954. | 2nd Nov 1938 | Box 154 \ 2 scan0159 | |
| Letter from Toledo Woodhead Springs confirming the dispatch of interleaving and cotton socks as requested. | 4th Nov 1938 | Box 154 \ 2 scan0160 | |
| Letter to a supplier detailing serious issues with springs tested on a test machine and after a road test. | 12th Nov 1938 | Box 154 \ 2 scan0161 | |
| Letter to Toledo Woodhead Springs Ltd. outlining technical issues and questions regarding their spring components. | 12th Nov 1938 | Box 154 \ 2 scan0162 | |
| Query to Toledo Woodhead Springs Ltd. regarding the cost of springs. | 12th Nov 1938 | Box 154 \ 2 scan0163 | |
| Letter to Ferodo Limited regarding the standardisation and sourcing of more durable leaf spring interleaving. | 16th Nov 1938 | Box 154 \ 2 scan0164 | |
| Letter from Toledo Woodhead Springs Ltd. regarding the dispatch, inspection, and delivery of springs and parts. | 16th Nov 1938 | Box 154 \ 2 scan0165 | |
| Letter to Ferodo Ltd. regarding the testing of experimental interleaving samples with a diagram. | 18th Nov 1938 | Box 154 \ 2 scan0166 | |
| Letter to Ferodo Ltd. regarding the requirements and pricing for spring interleaving material. | 18th Nov 1938 | Box 154 \ 2 scan0167 | |
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