| Description | Date | Identifier | |
| Test results for Goodrich Cord Tyres 33 X 6.75, detailing mileage run and wear remarks. | 7th Dec 1927 | Box 45 \ 2 Scan122 | |
| Order for a set of six silent tread tyres with tubes. | 5th Dec 1928 | Box 45 \ 2 Scan123 | |
| Letter to The Dunlop Rubber Co. regarding the testing of 'Fort' and 'Super' tyres and proposed modifications. | 7th Dec 1928 | Box 45 \ 2 Scan124 | |
| The supply and delivery schedule of Dunlop tyres for 20' rims. | 10th Dec 1928 | Box 45 \ 2 Scan125 | |
| Letter from Dunlop Rubber Co., Ltd. regarding the provision of two sets of 6' for 19' Fort Dunlop Silent Tyres. | 19th Dec 1928 | Box 45 \ 2 Scan126 | |
| Notification that the Dunlop Company will now only be making 32 x 6.75' Silent Tyres for 20' 'Fort' type rims. | 21th Dec 1928 | Box 45 \ 2 Scan127 | |
| Letter from Dunlop Rubber Co. Ltd regarding the production and dimensions of a 32 x 6.75' Silent Tyre. | 20th Dec 1928 | Box 45 \ 2 Scan128 | |
| Blueprint detailing the inflated and deflected shapes of a 7.00-20' Fort Silent Tyre. | 12th Dec 1928 | Box 45 \ 2 Scan129 | |
| Approving the Dunlop Company's decision to exclusively produce 'Fort' tyres for 40/50 20' rims. | 14th Jan 1929 | Box 45 \ 2 Scan130 | |
| Follow-up letter to the Dunlop Co. concerning experimental tyres with a longer non-skid life. | 14th Jan 1929 | Box 45 \ 2 Scan131 | |
| Request to the Paris Depot to obtain and despatch six Dunlop tyres for car 19-EX. | 19th Feb 1929 | Box 45 \ 2 Scan132 | |
| Telegram regarding Dunlop tyre specifications, asking to clarify English or French manufacture. | 21th Feb 1929 | Box 45 \ 2 Scan133 | |
| Instructing the Paris Depot to send Dunlop buttress tread tires to Chateauroux. | 21th Feb 1929 | Box 45 \ 2 Scan134 | |
| Telegram from Sevres, France regarding options for Dunlop tyres, specifically country of manufacture and tread type. | 21th Jul 1926 | Box 45 \ 2 Scan135 | |
| Letter discussing the supply of Dunlop tyres for a 19-EX car, comparing English and French options. | 21th Feb 1929 | Box 45 \ 2 Scan136 | |
| Telegram received by telephone concerning the manufacturing origin of Dunlop tyres. | 21th Feb 1929 | Box 45 \ 2 Scan137 | |
| Proposing a change from 21' to 20' rims for the 'SS' model and requesting tyre sourcing from Dunlop. | 3rd Mar 1929 | Box 45 \ 2 Scan138 | |
| Letter from Dunlop Rubber Co. Ltd. concerning tyre sizes, drop center rims, and information from American correspondents. | 23th Mar 1929 | Box 45 \ 2 Scan139 | |
| Letter from Dunlop Rubber Co. Ltd. about the difficulty of mounting tyres and requesting information on American rim specifications. | 23th Mar 1929 | Box 45 \ 2 Scan140 | |
| Order of silent tread tyres from Dunlop for Mr. Royce's car. | 1st Mar 1929 | Box 45 \ 2 Scan141 | |
| Letter from Dunlop regarding a customer's objection to the silent type of tyre. | 1st May 1929 | Box 45 \ 2 Scan142 | |
| Letter from the Development Manager regarding a complaint about tyres and ensuring it reaches the correct department. | 1st May 1929 | Box 45 \ 2 Scan143 | |
| Customer's objections and driver feedback regarding 'Silent Tyres' on a 20 HP car. | 23th Apr 1929 | Box 45 \ 2 Scan144 | |
| Investigation into incorrect tyre pressures caused by a faulty gauge and the resulting effects on tyre performance. | 23th Apr 1929 | Box 45 \ 2 Scan145 | |
| Tyre performance and recommended pressures for further experimentation. | 24th Apr 1929 | Box 45 \ 2 Scan146 | |
| Letter from Dunlop Rubber Co. Ltd. regarding revisions to 'Silent Type Tyres' based on test results. | 24th Apr 1929 | Box 45 \ 2 Scan147 | |
| Table of dimensions and weights for Dunlop Silent Tread 'Fort' type tyres. | 24th Apr 1929 | Box 45 \ 2 Scan148 | |
| Letter concerning a customer's objection to silent tyres and the subsequent action taken. | 1st May 1929 | Box 45 \ 2 Scan149 | |
| Short memo from the Development Manager to W.A. Robotham, Esq. | 23th Apr 1929 | Box 45 \ 2 Scan150 | |
| Objections raised by Mr. Antweiler regarding the original equipment Silent Tyres on his 20 HP car. | 23th Apr 1929 | Box 45 \ 2 Scan151 | |
| Investigation into incorrect tyre pressures caused by a faulty gauge and the resulting effects on tyre performance. | 23th Apr 1929 | Box 45 \ 2 Scan152 | |
| Recommendation for further tyre pressure experiments and communication with a customer regarding their equipment. | 1st May 1929 | Box 45 \ 2 Scan153 | |
| Customer's objections to replacing silent tread tyres with triple stud tyres. | 1st May 1929 | Box 45 \ 2 Scan154 | |
| Supply of 8 new experimental tyres from Dunlop on a 50/50 basis. | 7th May 1929 | Box 45 \ 2 Scan155 | |
| Letter from Dunlop Rubber Co. regarding experimental rubber buffer blocks for a 20 HP engine. | 17th May 1929 | Box 45 \ 2 Scan156 | |
| Letter to Dunlop Rubber Co. concerning incorrect tyre sizes, requesting more information on new types, and expressing disappointment with the non-skid silent tread tyre. | 4th Jul 1929 | Box 45 \ 2 Scan157 | |
| Correspondence regarding the unsuitability of 7' tyres for 21' rims and the testing of new tyre options. | 6th Jul 1929 | Box 45 \ 2 Scan158 | |
| Letter from Dunlop Rubber Co., Ltd. proposing a meeting to clarify some matters. | 6th Jul 1929 | Box 45 \ 2 Scan159 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a meeting to discuss tyres with Mr. Hives. | 8th Jul 1929 | Box 45 \ 2 Scan160 | |
| Dunlop's proposal to discontinue normal tyres and focus on 'Fort' tyres. | 12th Jul 1929 | Box 45 \ 2 Scan161 | |
| Comparative tyre tests and the potential need to find an alternative supplier to Dunlop. | 17th Jul 1929 | Box 45 \ 2 Scan162 | |
| From ROY to Hs. seeking clarification on agreed changes to tyre equipment with the Dunlop Company. | 26th Aug 1929 | Box 45 \ 2 Scan163 | |
| Proposal from the Dunlop Company to substitute 'FORT' tyres for the ensuing season. | 9th Jul 1929 | Box 45 \ 2 Scan164 | |
| Letter from Dunlop Rubber Co. regarding a delay in supplying Fort tyres for testing. | 17th Aug 1929 | Box 45 \ 2 Scan165 | |
| Letter from Dunlop Rubber Co. Ltd. confirming tyre supply arrangements for the new season. | 26th Aug 1929 | Box 45 \ 2 Scan166 | |
| Letter to Dunlop Rubber Co. Ltd. regarding tyre specifications and supply for 40/50 and 20 HP models. | 28th Aug 1929 | Box 45 \ 2 Scan167 | |
| The need to modify the spare wheel carrier when standardising 7' tyres on 40/50 HP cars. | 5th Sep 1929 | Box 45 \ 2 Scan168 | |
| Comparison of dimensions and specifications for the 7.00-21' Dunlop Silent Tread 'Fort' Reinforced Tyre against the standard 33 x 6.75' tyre. | 14th Sep 1929 | Box 45 \ 2 Scan169 | |
| Numerous disadvantages of a new tyre size, focusing on negative steering effects and required modifications. | 16th Sep 1929 | Box 45 \ 2 Scan170 | |
| Letter to Dunlop Rubber Co. detailing the drawbacks and rejection of their 7' x 21' tyres after testing. | 16th Sep 1929 | Box 45 \ 2 Scan171 | |
| Letter from Dunlop Rubber Co. discussing the suitability of 'Fort' Silent tyres for Rolls-Royce experiments. | 19th Sep 1929 | Box 45 \ 2 Scan172 | |
| Letter from Dunlop Rubber Co. Ltd. inquiring about the progress of tests on 7.00 Dunlop Fort tyres. | 19th Sep 1929 | Box 45 \ 2 Scan173 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the testing and rejection of their 7' tyres. | 23th Sep 1929 | Box 45 \ 2 Scan174 | |
| Letter from Dunlop regarding experiments to modify 'Fort' tyre treads to improve steering performance. | 27th Sep 1929 | Box 45 \ 2 Scan175 | |
| Letter from Dunlop Rubber Co. Ltd. regarding sending altered tyres for testing to improve steering. | 9th Oct 1929 | Box 45 \ 2 Scan176 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the testing of new tyre types. | 23th Oct 1929 | Box 45 \ 2 Scan177 | |
| Letter from Dunlop regarding proposed alterations to the tread of Silent tyres. | 30th Oct 1929 | Box 45 \ 2 Scan178 | |
| Fitment issues with a buttress tread tyre on a Phantom II spare wheel carrier. | 30th Oct 1929 | Box 45 \ 2 Scan179 | |
| Experimental Dunlop tyres and potential difficulties with spare wheel carriers. | 11th Nov 1929 | Box 45 \ 2 Scan180 | |
| Sketch showing a modification to the profile of an existing 33 x 6.75 Dunlop Silent Tyre. | 1st Nov 1929 | Box 45 \ 2 Scan181 | |
| Letter from Dunlop Rubber Co. regarding the supply and availability of 'Fort' Silent tyre covers for 21' and 19' rims. | 1st Nov 1929 | Box 45 \ 2 Scan182 | |
| Letter to the Dunlop Rubber Co. Ltd. discussing a proposed tyre modification and concerns over poor non-skid qualities. | 8th Nov 1929 | Box 45 \ 2 Scan183 | |
| Letter to a tyre supplier regarding the availability of specific buttress tread tyres and feedback on new tyre designs. | 8th Nov 1929 | Box 45 \ 2 Scan184 | |
| Outlining the procedure for requisitioning tyres for experimental cars. | 9th Nov 1929 | Box 45 \ 2 Scan185 | |
| Letter from Dunlop Rubber Co. arranging a meeting to discuss Silent type tyres. | 11th Nov 1929 | Box 45 \ 2 Scan186 | |
| Letter to The Dunlop Rubber Co., Ltd. arranging a visit to the Dunlop Works. | 12th Nov 1929 | Box 45 \ 2 Scan187 | |
| Visit to Dunlop Rubber Co. concerning tyre design, safety, and road adhesion for the Silent Tread tyre. | 6th Nov 1929 | Box 45 \ 2 Scan188 | |
| Tyre performance, skidding issues, and development with Dunlop, including experiments with abrasive compounds. | 16th Nov 1929 | Box 45 \ 2 Scan189 | |
| The availability of Dunlop tyres for 40/50 and 20 HP standard sizes. | 16th Nov 1929 | Box 45 \ 2 Scan190 | |
| Letter from Dunlop Rubber Co. Ltd. regarding a production difficulty with the out-of-balance limit for tyres. | 11th Dec 1929 | Box 45 \ 2 Scan191 | |
| Letter to The Dunlop Rubber Co. Ltd. seeking clarification on tyre specifications and an update on an improved tread pattern. | 12th Dec 1929 | Box 45 \ 2 Scan192 | |
| Letter to Dunlop requesting tyre performance data for various tyre sizes and loads. | 13th Dec 1929 | Box 45 \ 2 Scan193 | |
| From the Paris Stores Department regarding the status of 32 x 6.75 Dunlop Tyres. | 16th Dec 1929 | Box 45 \ 2 Scan194 | |
| Letter from Dunlop Rubber Co. Ltd. correcting a previous error in tyre dimensions and discussing further testing. | 16th Dec 1929 | Box 45 \ 2 Scan195 | |
| Letter from Dunlop Rubber Co. Ltd. acknowledging a query regarding the power absorption of tyres. | 17th Dec 1929 | Box 45 \ 2 Scan196 | |
| Request to the Paris office to hold 32 x 6.75 Dunlop tyres for an upcoming 10,000 miles test. | 18th Dec 1929 | Box 45 \ 2 Scan197 | |
| Dunlop's production difficulties with out-of-balance limits for 20 HP tyres and proposing solutions. | 19th Dec 1929 | Box 45 \ 2 Scan198 | |
| Letter to Dunlop Rubber Co. regarding out-of-balance limits for 6' tyres on 20' rims. | 20th Dec 1929 | Box 45 \ 2 Scan199 | |
| Outlining the objections and disadvantages of fitting larger 'India' brand tyres. | 1st Jan 1930 | Box 45 \ 2 Scan200 | |
| Objections to fitting larger section tyres and a new standardisation for 20-inch rims. | 1st Jan 1930 | Box 45 \ 2 Scan201 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a change to 20' rims and requesting tyre moulds with an improved silent tread for the 40/50 car. | 1st Jan 1930 | Box 45 \ 2 Scan202 | |
| Letter from Dunlop regarding the provision of 7.00 tyres with Silent tread for 20 inch rims and a demonstration of anti-skid tests. | 2nd Jan 1930 | Box 45 \ 2 Scan203 | |
| Letter to The Dunlop Rubber Co. Ltd. arranging a visit to see tests mentioned in their letter. | 6th Jan 1930 | Box 45 \ 2 Scan204 | |
| Letter from Dunlop Rubber Co., Ltd. regarding the scheduling of a visit. | 8th Jan 1930 | Box 45 \ 2 Scan205 | |
| Letter from Dunlop Rubber Co. Ltd. regarding a delay in providing requested information due to extensive testing. | 8th Jan 1930 | Box 45 \ 2 Scan206 | |
| Letter to The Dunlop Rubber Co. Ltd. confirming a visit for the attention of Mr. Bond. | 10th Jan 1930 | Box 45 \ 2 Scan207 | |
| Letter to Dunlop Rubber Co. Ltd. inquiring about power loss in tyres as a function of transmitted power. | 17th Jan 1930 | Box 45 \ 2 Scan208 | |
| Letter to Dunlop about a complaint of skidding with the Silent Tread tyre on bitumen surfaces. | 17th Jan 1930 | Box 45 \ 2 Scan209 | |
| Visit to Dunlop to review progress on the anti-skid properties of the Silent Tread tyre. | 17th Jan 1930 | Box 45 \ 2 Scan210 | |
| Report comparing the skidding performance of various tyre treads, including the Silent Tread, Palmer Cord, and Triple Stud. | 17th Jan 1930 | Box 45 \ 2 Scan211 | |
| To the stores department requesting the despatch of a brake drum wing to Dunlop Rubber Co. Ltd. on loan for testing. | 17th Jan 1930 | Box 45 \ 2 Scan212 | |
| Letter from Dunlop Rubber Co. Ltd. acknowledging receipt of a brake drum ring for skidding experiments. | 21th Jan 1930 | Box 45 \ 2 Scan213 | |
| Letter from Dunlop Rubber Co. acknowledging a request for further information. | 21th Jan 1930 | Box 45 \ 2 Scan214 | |
| Letter to the Dunlop Rubber Co. Ltd. regarding the specifications for rubber bush F.55858. | 5th Feb 1930 | Box 45 \ 2 Scan215 | |
| 20HP rubber engine mounting block sample to Messrs. Dunlop & Co. Ltd. | 7th Feb 1930 | Box 45 \ 2 Scan216 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the design and supply of 20 HP rubber engine mounting blocks. | 7th Feb 1930 | Box 45 \ 2 Scan217 | |
| Letter discussing the working length of blocks and the choice between three types of material mixes. | 8th Feb 1930 | Box 45 \ 2 Scan218 | |
| Letter from Dunlop Rubber Co. Ltd. regarding a trial order and testing of rubber bushes. | 8th Feb 1930 | Box 45 \ 2 Scan219 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a permanent set issue with ordered rubber blocks and proposing revised dimensions. | 13th Feb 1930 | Box 45 \ 2 Scan220 | |
| Sending two Rubber Engine Mounting Blocks to Messrs. Dunlop & Co. Ltd. for inspection. | 13th Feb 1930 | Box 45 \ 2 Scan221 | |
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