| Description | Date | Identifier | |
| Letter from India Tyre & Rubber Co. regarding the balancing of tyres sent to the Experimental Dept. | 30th Jun 1930 | Box 29 \ 4 Scan052 | |
| Letter to The India Tyre & Rubber Co. describing the method for checking tyre cover out-of-balance. | 14th Jul 1930 | Box 29 \ 4 Scan053 | |
| Letter from The Car Mart Ltd arranging a meeting for W.A. Robotham with the India Tyre and Rubber Company to discuss balance requirements. | 1st Aug 1930 | Box 29 \ 4 Scan054 | |
| Letter from India Tyre & Rubber Co. arranging a meeting to discuss tyre problems. | 5th Aug 1930 | Box 29 \ 4 Scan055 | |
| Letter to The India Tyre & Rubber Co. Ltd. arranging a meeting for August 18th. | 11th Aug 1930 | Box 29 \ 4 Scan056 | |
| Letter from The Car Mart Ltd acknowledging a letter regarding the question of INDIA Tyres. | 12th Aug 1930 | Box 29 \ 4 Scan057 | |
| Comparing fuel or oil consumption figures for various engines, including Rolls-Royce, Chrysler, and Pierce. | 20th Aug 1930 | Box 29 \ 4 Scan058 | |
| Agreement to test a set of India tyres on a 40/50 Experimental car and to arrange the price. | 20th Aug 1930 | Box 29 \ 4 Scan059 | |
| Letter from India Tyre & Rubber Co. discussing the development and supply of test tyres. | 20th Aug 1930 | Box 29 \ 4 Scan060 | |
| Chasing an overdue order for 40/50 India tyres and requesting a set of 20 HP tyres for testing. | 13th Nov 1930 | Box 29 \ 4 Scan061 | |
| Letter to Captain Bowman of The Car Mart Ltd. regarding the acquisition of India Tyres for testing. | 13th Nov 1930 | Box 29 \ 4 Scan062 | |
| Letter from Car Mart Ltd concerning a reminder about India Tyres. | 14th Nov 1930 | Box 29 \ 4 Scan063 | |
| Letter to The India Tyre & Rubber Co. requesting the urgent delivery of four 20 HP tyre covers to France for testing. | 20th Nov 1930 | Box 29 \ 4 Scan064 | |
| The supply of eight 20 HP tyres from the India Tyre Co for use in Chateauroux and Derby. | 20th Nov 1930 | Box 29 \ 4 Scan065 | |
| Letter from The Car Mart Ltd regarding the supply of India Tyres for testing on 20/25 HP and 40/50 HP chassis. | 20th Nov 1930 | Box 29 \ 4 Scan066 | |
| Letter to W.A. Robotham regarding an offer for free tyres and the 'INDIA' production project. | 21th Nov 1930 | Box 29 \ 4 Scan067 | |
| Letter from India Tyre & Rubber Co. regarding the shipment of tyre covers to France and Derby. | 21th Nov 1930 | Box 29 \ 4 Scan068 | |
| Cover note stating a copy of a letter is attached as requested. | 5th Jul 1936 | Box 29 \ 4 Scan069 | |
| Letter to The India Tyre & Rubber Co. correcting an error in a previous communication regarding the quantity and destination of tyre covers. | 22th Nov 1930 | Box 29 \ 4 Scan070 | |
| Notification from the India Tyre Company regarding a shipment of tyres for a 40/50-HP chassis. | 10th Dec 1930 | Box 29 \ 4 Scan071 | |
| Comparing Dunlop and India tyres for 40/50 & 20 HP cars. | 5th Feb 1931 | Box 29 \ 4 Scan072 | |
| Examination of Canadian Dunlop tyres and considering 'India' tyres as an alternative for 40/50 HP and 20 HP cars. | 5th Feb 1931 | Box 29 \ 4 Scan073 | |
| Performance and suitability of Dunlop Modified Silent Tread tyres for different road conditions. | 4th Mar 1931 | Box 29 \ 4 Scan074 | |
| Follow-up letter from The Car Mart Ltd requesting the results of experimental tests on INDIA Tyres. | 16th Mar 1931 | Box 29 \ 4 Scan075 | |
| Abridged report on the testing of 'India' tyres on a 25 HP car. | 17th Mar 1931 | Box 29 \ 4 Scan076 | |
| Letter from India Tyre & Rubber Co. (Great Britain) Ltd requesting test results for tyres supplied. | 23th Mar 1931 | Box 29 \ 4 Scan077 | |
| Letter to The India Tyre & Rubber Co. regarding the results of tests on 20 HP tyres. | 24th Mar 1931 | Box 29 \ 4 Scan078 | |
| Letter from India Tyre & Rubber Co. acknowledging the good results of test tyres and requesting the official report. | 25th Mar 1931 | Box 29 \ 4 Scan079 | |
| Internal correspondence regarding a tyre compatibility issue on car 121-XJ, involving India Tyre & Rubber Co. | 31th Mar 1931 | Box 29 \ 4 Scan080 | |
| Letter from a tyre company regarding chafing issues between the tyre cover bead and the inner tube on well base rims. | 13th Mar 1931 | Box 29 \ 4 Scan081 | |
| Page two of a letter from India Super Tyres (West Midland) Ltd. signed by the Managing Director. | 13th Apr 1931 | Box 29 \ 4 Scan082 | |
| Suitability of India Tyres versus Dunlops for the 40/50 HP car. | 13th Apr 1931 | Box 29 \ 4 Scan083 | |
| Letter to The Car Mart regarding a complaint about the India Tyre Co. circularising customers. | 13th Apr 1931 | Box 29 \ 4 Scan084 | |
| Letter from India Super Tyres regarding tyre chafing issues on wire wheels with well base rims. | 13th Mar 1931 | Box 29 \ 4 Scan085 | |
| The second page of a typed letter from India Super Tyres (West Midland) Ltd. | 14th Apr 1931 | Box 29 \ 4 Scan086 | |
| Unsuitability of wheel and tyre equipment for car 121-XJ. | 14th Apr 1931 | Box 29 \ 4 Scan087 | |
| Letter from The Car Mart Ltd to W.A. Robotham regarding a communication about India Super Tyres. | 16th Apr 1931 | Box 29 \ 4 Scan088 | |
| The concluding page of a letter expressing regret for an inconvenience and reaffirming a good business relationship. | 21th Apr 1931 | Box 29 \ 4 Scan089 | |
| Letter of apology from India Tyre & Rubber Co. regarding a complaint and inconvenience caused. | 21th Apr 1931 | Box 29 \ 4 Scan090 | |
| Query on the suitability of wellbase wheels for 6.75 tyres for chassis 121-XJ. | 4th Jun 1931 | Box 29 \ 4 Scan091 | |
| Correspondence with India Tyre Co. and Dunlop regarding tyre and rim issues. | 9th Jun 1931 | Box 29 \ 4 Scan092 | |
| Apology letter from India Tyre & Rubber Co. regarding a complaint about India Super Tyres. | 21th Apr 1931 | Box 29 \ 4 Scan093 | |
| Standardisation of chassis parts, testing India Tyres as an alternative to Dunlop tyres. | 4th Mar 1931 | Box 29 \ 4 Scan094 | |
| Purchase and testing of Goodyear and India tyres with silent non-skid treads on an experimental car. | 4th Jan 1933 | Box 29 \ 4 Scan095 | |
| Order for a set of Bensport tyres and inner tubes for the second chassis. | 5th Jan 1933 | Box 29 \ 4 Scan096 | |
| Requesting the dispatch of a set of 5 India tyres for Bensport to G.W.H. at Chateauroux. | 8th Feb 1933 | Box 29 \ 4 Scan097 | |
| Trial of different tyre makes, specifically India Tyres, on experimental cars. | 22th Feb 1933 | Box 29 \ 4 Scan098 | |
| Selection and testing of tyres for the 'Bensport' car. | 27th Feb 1933 | Box 29 \ 4 Scan099 | |
| Order for 6 India tyres and tubes for the 'Bensport' car, to be sent to Chateauroux. | 30th Mar 1933 | Box 29 \ 4 Scan100 | |
| Internal memorandum requesting an order for India tyres for two Bensports chassis. | 6th Apr 1933 | Box 29 \ 4 Scan101 | |
| Letter from a tyre manufacturer regarding a new 'Silent Tread Tyre' design for a Bentley. | 21th Apr 1933 | Box 29 \ 4 Scan102 | |
| Letter from the India Tyre & Rubber Company regarding the testing of special tyres and tread design. | 11th May 1933 | Box 29 \ 4 Scan103 | |
| Letter concerning the supply of original equipment for a new Bentley model. | 11th May 1933 | Box 29 \ 4 Scan104 | |
| Letter from the India Tyre & Rubber Company regarding the silence of tyres and clarifying the difference between 'Super Non Skid' and 'Standard' types. | 16th May 1933 | Box 29 \ 4 Scan105 | |
| Letter to Lord Rothes regarding the performance of a set of tyres and requesting data on standard Bentley tyres. | 15th May 1933 | Box 29 \ 4 Scan106 | |
| Letter from India Tyre & Rubber Company concerning tyre balance tolerance and a shipment of tyres and tubes. | 17th May 1933 | Box 29 \ 4 Scan107 | |
| Maximum out-of-balance tolerance for India Tyres fitted to a Bentley. | 23th May 1933 | Box 29 \ 4 Scan108 | |
| Letter to India Tyre & Rubber Co. regarding the satisfactory out-of-balance specifications for tyres. | 23th May 1933 | Box 29 \ 4 Scan109 | |
| Letter from India Tyre & Rubber Co. confirming the dispatch of tyre covers to France for testing purposes. | 24th May 1933 | Box 29 \ 4 Scan110 | |
| Requesting an order of eight special silent non-skid tyres for a Bentley car, to be delivered to France. | 24th May 1933 | Box 29 \ 4 Scan111 | |
| From Chateauroux, France confirming the receipt of eight 5.50 x 18 India Silent Tread tyres with their corresponding serial numbers. | 30th May 1933 | Box 29 \ 4 Scan112 | |
| Exchanging ordinary tread for silent tread India tyres for a 3½ Litre Bentley and the terms of supply. | 31th May 1933 | Box 29 \ 4 Scan113 | |
| Letter from India Tyre & Rubber Company regarding the exchange of Super Non-Skid tyres for silent tread tyres and arrangements for trials in France. | 31th May 1933 | Box 29 \ 4 Scan114 | |
| Page 2 of a handwritten letter regarding conflicting business appointments and travel to France for trials. | 31th May 1933 | Box 29 \ 4 Scan115 | |
| Letter to Lord Rothes regarding the arrangements for sending a Bentley car to France. | 3rd Jun 1933 | Box 29 \ 4 Scan116 | |
| Letter from India Tyre & Rubber Company regarding the supply and dispatch of special tyres. | 26th Jun 1933 | Box 29 \ 4 Scan117 | |
| Letter to the Earl of Rothes regarding the departure date of his Bentley and the availability of tyres. | 7th Jul 1933 | Box 29 \ 4 Scan118 | |
| Letter from Rothes to Robotham regarding the departure of a Bentley and a planned visit to France. | 8th Jul 1933 | Box 29 \ 4 Scan119 | |
| Standardization of India tyres for the Bentley chassis. | 13th Jul 1933 | Box 29 \ 4 Scan120 | |
| Standardisation of India tyres for the Bentley chassis to differentiate it from Rolls-Royce models. | 13th Jul 1933 | Box 29 \ 4 Scan121 | |
| The standardisation of India tyres for Bentley chassis. | 14th Jul 1933 | Box 29 \ 4 Scan122 | |
| The supply of India Tyres for Bentley Chassis. | 15th Jul 1933 | Box 29 \ 4 Scan123 | |
| Letter to the Earl of Rothes regarding a Bentley in France for tyre testing and arranging a meeting. | 20th Jul 1933 | Box 29 \ 4 Scan124 | |
| Confirming the name of special tyres from India Tyre & Rubber Co. for a Bentley car chassis. | 28th Jul 1933 | Box 29 \ 4 Scan125 | |
| Letter from the India Tyre & Rubber Company discussing experiments on a new tyre tread pattern for the Rolls-Royce Bentley Chassis. | 9th Aug 1933 | Box 29 \ 4 Scan126 | |
| Letter from India Tyre & Rubber Co. regarding the approval and testing of a modified tyre. | 10th Aug 1933 | Box 29 \ 4 Scan127 | |
| Letter to India Tyre & Rubber Co Ltd regarding tyre testing in France. | 10th Aug 1933 | Box 29 \ 4 Scan128 | |
| Letter from the India Tyre & Rubber Company regarding a modified tyre design and testing. | 11th Aug 1933 | Box 29 \ 4 Scan129 | |
| Letter to The India Tyre & Rubber Co. Ltd. concerning the testing and standardisation of tyres. | 21th Aug 1933 | Box 29 \ 4 Scan130 | |
| Letter from the India Tyre & Rubber Company regarding the manufacture and testing of tyres for the Rolls-Royce Bentley. | 23th Aug 1933 | Box 29 \ 4 Scan131 | |
| Invoice from India Tyre & Rubber Co. for experimental covers and tubes for which no official order was placed. | 19th Sep 1933 | Box 29 \ 4 Scan132 | |
| Official order for tyres. | 20th Sep 1933 | Box 29 \ 4 Scan133 | |
| Letter from India Tyre & Rubber Co. apologising for fitting Bentley chassis with incorrectly named tyres. | 27th Sep 1933 | Box 29 \ 4 Scan134 | |
| Letter to W.A. Robotham regarding the use of specific 'India Speed Special' tyres for chassis testing. | 27th Sep 1933 | Box 29 \ 4 Scan135 | |
| Letter from the Experimental Dept. to the Earl of Rothes regarding the supply and use of tyres for test cars. | 29th Sep 1933 | Box 29 \ 4 Scan136 | |
| Letter from India Tyre & Rubber Company detailing the replacement and return of 59 old tyres from Bentley chassis. | 10th Oct 1933 | Box 29 \ 4 Scan137 | |
| Letter to W.A. Robotham detailing tyre changes on a number of chassis. | 10th Oct 1933 | Box 29 \ 4 Scan138 | |
| Letter to the Earl of Rothes regarding changed tyres and ongoing investigations into criticisms. | 19th Oct 1933 | Box 29 \ 4 Scan139 | |
| Letter from the India Tyre & Rubber Company responding to criticisms about tyre performance on wet roads, particularly concerning Bentley cars. | 20th Oct 1933 | Box 29 \ 4 Scan140 | |
| Letter from a special representative at India Tyre & Rubber Company to W.A. Robotham regarding the purchase of a 1928 car and a meeting request. | 4th Nov 1933 | Box 29 \ 4 Scan141 | |
| Requesting an order of 20 rubber bands for 5.50' x 18' Bentley tyres from the India Tyre Co. | 6th Nov 1933 | Box 29 \ 4 Scan142 | |
| Letter from the Experimental Department to the Earl of Rothes regarding a potential visit. | 6th Nov 1933 | Box 29 \ 4 Scan143 | |
| Instruction regarding the condition of tyres on demonstration cars for the Scottish Motor Show. | 20th Nov 1933 | Box 29 \ 4 Scan144 | |
| Letter to the India Tyre Company regarding tyre wear on demonstration cars and arranging a test against competitor tyres. | 20th Nov 1933 | Box 29 \ 4 Scan145 | |
| Letter from a tyre supplier regarding skidding complaints on a new Bentley and arranging further tests. | 20th Nov 1933 | Box 29 \ 4 Scan146 | |
| Letter to W.A. Robotham requesting access to a Bentley chassis for skidding tests. | 20th Nov 1933 | Box 29 \ 4 Scan147 | |
| Letter from India Tyre & Rubber Co. investigating reports of skidding on a demonstration car's tyres. | 23th Nov 1933 | Box 29 \ 4 Scan148 | |
| Letter to W.A. Robotham discussing peculiar tyre wear, a proposed new tread design, and arrangements for testing. | 23th Nov 1933 | Box 29 \ 4 Scan149 | |
| Letter discussing tyre performance and arrangements for a Bentley being taken to America. | 23th Nov 1933 | Box 29 \ 4 Scan150 | |
| Tyre tread print analysis for an 'India Speed Special' tyre. | 23th Nov 1933 | Box 29 \ 4 Scan151 | |
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