| Description | Date | Identifier | |
| Letter from the India Tyre & Rubber Company detailing the weights of various tyre tubes and recommended rim sizes. | 22th Mar 1935 | Box 30 \ 5 Scan051 | |
| Letter to The India Tyre & Rubber Co. regarding testing 4-ply tyres and light alloy wheels on a Bentley to save weight. | 25th Mar 1935 | Box 30 \ 5 Scan052 | |
| Letter from a tyre company discussing the disadvantages of a 4-ply versus a 6-ply tyre cover for a Bentley. | 26th Mar 1935 | Box 30 \ 5 Scan053 | |
| Letter from India Tyre & Rubber Co. regarding a new 25 HP R-R car and using their tyres on a Bentley for the Ulster T.T. race. | 28th Mar 1935 | Box 30 \ 5 Scan054 | |
| Letter to the Earl of Rothes regarding Mr. Thorne's troubles and a Bentley's participation in road racing. | 30th Mar 1935 | Box 30 \ 5 Scan055 | |
| Letter from India Tyre & Rubber Company regarding tread depth on 4 ply and 6 ply Aero Cushion tyres. | 1st Apr 1935 | Box 30 \ 5 Scan056 | |
| Letter from the India Tyre & Rubber Company Ltd. regarding Bentley and road racing information. | 2nd Apr 1935 | Box 30 \ 5 Scan057 | |
| Letter to the India Tyre & Rubber Co. regarding the trial of their 4-ply tyres on an experimental car. | 8th Apr 1935 | Box 30 \ 5 Scan058 | |
| Letter to The Earl of Rothes enclosing a copy of correspondence addressed to Mr. Worth. | 8th Apr 1935 | Box 30 \ 5 Scan059 | |
| The order of Bentley wheels from Dunlop and tyres from the India Tyre Co. | 8th Apr 1935 | Box 30 \ 5 Scan060 | |
| Letter from India Tyre & Rubber Co. regarding the tread pattern of a 4 ply 6.00/16 tyre being sent for testing. | 9th Apr 1935 | Box 30 \ 5 Scan061 | |
| Design drawing for a 6.00-16 India Aero Cushion tyre tread and mould. | 18th Oct 1933 | Box 30 \ 5 Scan062 | |
| Letter from a tyre company regarding the supply of 4-ply 6.00-16 tyres and their performance. | 9th Apr 1935 | Box 30 \ 5 Scan063 | |
| Advertisement for the India Tyres comprehensive range with a handwritten annotation. | 9th Apr 1935 | Box 30 \ 5 Scan064 | |
| Conditions of sale and contact list for India motor car tyres. | 10th Apr 1935 | Box 30 \ 5 Scan065 | |
| Letter from India Tyre & Rubber Company regarding the supply of 4 ply 6.00/16 covers for testing. | 10th Apr 1935 | Box 30 \ 5 Scan066 | |
| Letter to The India Tyre & Rubber Co.Ltd regarding the direct shipment of tyres and tubes. | 11th Apr 1935 | Box 30 \ 5 Scan067 | |
| Letter from India Tyre & Rubber Company Ltd. to arrange a meeting with W.A. Robotham and Mr. Royce. | 11th Apr 1935 | Box 30 \ 5 Scan068 | |
| Letter to the Earl of Rothes at The India Tyre & Rubber Co. Ltd. to arrange a visit. | 12th Apr 1935 | Box 30 \ 5 Scan069 | |
| Letter from India Tyre & Rubber Company regarding a new tyre type for trial on Bentley cars. | 13th Apr 1935 | Box 30 \ 5 Scan070 | |
| Tackling tyre noise, arranging comparative tests for India tyres, and demonstrating issues with Dunlop tyres. | 15th Apr 1935 | Box 30 \ 5 Scan071 | |
| Letter from India Tyre & Rubber Company confirming the dispatch date for 6.00/16 tyres. | 16th Apr 1935 | Box 30 \ 5 Scan072 | |
| Requesting payment authorisation for an invoice from the India Tyre & Rubber Co. Ltd. | 18th Apr 1935 | Box 30 \ 5 Scan073 | |
| Official order be placed for tyres and tubes from the India Tyre & Rubber Co. Ltd. | 26th Apr 1935 | Box 30 \ 5 Scan074 | |
| Letter from the India Tyre & Rubber Company discussing the substitution of a new tyre design for Bentley vehicles. | 25th Apr 1935 | Box 30 \ 5 Scan075 | |
| The second page of a letter to W.A. Robotham from Rothes, discussing a potential engineering candidate. | 25th Apr 1935 | Box 30 \ 5 Scan076 | |
| Letter to The India Tyre & Rubber Co. Ltd. about the 'India Super Tyre', its testing, and the need to widen the tread to compete with Dunlop '90'. | 3rd May 1935 | Box 30 \ 5 Scan077 | |
| Letter from India Tyre & Rubber Company regarding the change to India Super Tyres for Bentley vehicles. | 7th May 1935 | Box 30 \ 5 Scan078 | |
| Letter from India Tyre & Rubber Co. Ltd. regarding the supply of tyres for Bentley. | 11th May 1935 | Box 30 \ 5 Scan079 | |
| Letter from India Tyre & Rubber Company, Ltd. requesting test results for a new pattern of India Tyres. | 14th May 1935 | Box 30 \ 5 Scan080 | |
| Letter to The India Tyre & Rubber Co. Ltd. regarding the testing of 16' tyres. | 23th May 1935 | Box 30 \ 5 Scan081 | |
| Letter from India Tyre & Rubber Co. Ltd. requesting results from tyre tests. | 29th May 1935 | Box 30 \ 5 Scan082 | |
| Letter to The India Tyre & Rubber Co. Ltd. regarding a car and tyre test on the Continent. | 30th May 1935 | Box 30 \ 5 Scan083 | |
| Letter from the India Tyre & Rubber Company Ltd. arranging a meeting and lunch. | 1st Jun 1935 | Box 30 \ 5 Scan084 | |
| Letter to The Earl of Rothes at The India Tyre & Rubber Co. Ltd. apologising for being unable to meet. | 3rd Jun 1935 | Box 30 \ 5 Scan085 | |
| Letter from the India Tyre & Rubber Company regarding Aero Cushion tyres and an enclosed letter for Mr. Royce. | 1st Jul 1935 | Box 30 \ 5 Scan086 | |
| Letter from India Tyre & Rubber Co. Ltd. regarding the supply of new 'Super Tyre' for Bentley Chassis. | 28th Jun 1935 | Box 30 \ 5 Scan087 | |
| Letter to The Earl of Rothes regarding tyre testing, silence improvement and coachwork. | 9th Jul 1935 | Box 30 \ 5 Scan088 | |
| Letter arranging a meeting in Derby to discuss Aero Cushion Tyres. | 9th Jul 1935 | Box 30 \ 5 Scan089 | |
| Letter from the India Tyre & Rubber Company regarding testing of Aero Cushion tyres and wheels. | 10th Jul 1935 | Box 30 \ 5 Scan090 | |
| Test report on India Aero Cushion Tyres 6.00 x 16. | 10th Jul 1935 | Box 30 \ 5 Scan091 | |
| Letter to the Earl of Rothes regarding Aero Cushion Tyres. | 12th Jul 1935 | Box 30 \ 5 Scan092 | |
| Price list for India Tyres and Tubes from 1935. | 24th Jun 1935 | Box 30 \ 5 Scan093 | |
| Letter from India Tyre & Rubber Company Ltd. to W.A. Robotham to arrange a meeting. | 29th Jul 1935 | Box 30 \ 5 Scan094 | |
| Letter from the Experimental Department to the Earl of Rothes to arrange a meeting. | 30th Jul 1935 | Box 30 \ 5 Scan095 | |
| Letter from the India Tyre & Rubber Company Ltd. arranging a meeting in Derby. | 31th Jul 1935 | Box 30 \ 5 Scan096 | |
| The purchase of two sets of tyres. | 8th Aug 1935 | Box 30 \ 5 Scan097 | |
| Letter from India Tyre & Rubber Co. Ltd. concerning the supply and testing of experimental tyres for a Bentley. | 8th Aug 1935 | Box 30 \ 5 Scan098 | |
| Page 2 of a letter to W.A. Robotham asking for an opinion on a trip and mileage information for tyre covers. | 8th Aug 1935 | Box 30 \ 5 Scan099 | |
| Letter from India Tyre & Rubber Company Ltd regarding tyre performance on a Bentley and preparations for the T.T. race. | 26th Aug 1935 | Box 30 \ 5 Scan100 | |
| Letter to W.A. Robotham regarding tyre specifications and competition with Dunlop. | 26th Aug 1935 | Box 30 \ 5 Scan101 | |
| Short, incomplete letter to The Earl of Rothes regarding comments on tyres. | 3rd Sep 1935 | Box 30 \ 5 Scan102 | |
| Letter from the India Tyre & Rubber Company Ltd. acknowledging receipt of a letter and its enclosure. | 4th Sep 1935 | Box 30 \ 5 Scan103 | |
| Letter to the India Tyre & Rubber Co. Ltd. regarding tyre performance in the T.T. race, a personnel matter, and a road trip. | 10th Sep 1935 | Box 30 \ 5 Scan104 | |
| Letter discussing the difficulty of shooting driven Hungarian partridges compared to those in England. | 10th Sep 1935 | Box 30 \ 5 Scan105 | |
| Letter to Mr. J.B. Dixon expressing reservations about his potential employment due to lack of experience. | 11th Sep 1935 | Box 30 \ 5 Scan106 | |
| Request to supply four India Speed Special Covers, size 5 x 18, for a personal car. | 12th Sep 1935 | Box 30 \ 5 Scan107 | |
| Letter to The Earl of Rothes at India Tyre & Rubber Co. regarding the distribution of their tyres in Paris. | 13th Sep 1935 | Box 30 \ 5 Scan108 | |
| Letter from India Tyre & Rubber Co. correcting tyre measurement data for a Bentley. | 18th Sep 1935 | Box 30 \ 5 Scan109 | |
| Measurement of tyre wear on E.R. Hall's Bentley after the 1935 Ulster T.T. race. | 17th Sep 1935 | Box 30 \ 5 Scan110 | |
| Letter from India Tyre & Rubber Company congratulating an individual on Bentley's achievements in Ulster. | 17th Sep 1935 | Box 30 \ 5 Scan111 | |
| Letter from India Tyre & Rubber Company Ltd. to Mr. W.A. Robotham. | 17th Sep 1935 | Box 30 \ 5 Scan112 | |
| Page two of a letter discussing arrangements with distributors and a Mr. Sleator. | 18th Sep 1935 | Box 30 \ 5 Scan113 | |
| Letter from India Tyre & Rubber Company regarding tyre wear measurements on a Bentley after the T.T. Race. | 18th Sep 1935 | Box 30 \ 5 Scan114 | |
| Cross-sectional diagrams of two different tire sizes. | 19th Sep 1935 | Box 30 \ 5 Scan115 | |
| Test report on 6' x 16' 6-ply India Aero Cushion Tyres fitted to a Bentley. | 19th Sep 1935 | Box 30 \ 5 Scan116 | |
| Urgent request to order seven 7 x 18' tyres from the India Tyre company. | 20th Sep 1935 | Box 30 \ 5 Scan117 | |
| Letter to The India Tyre & Rubber Co. regarding tyre performance analysis and ordering further tyres for testing. | 20th Sep 1935 | Box 30 \ 5 Scan118 | |
| Letter to the India Tyre & Rubber Co. Ltd. concerning issues with tyre noise and ordering replacements. | 20th Sep 1935 | Box 30 \ 5 Scan119 | |
| Letter from India Tyre & Rubber Company enquiring about the performance of trial tyres and an opinion on a new all-steel body. | 20th Sep 1935 | Box 30 \ 5 Scan120 | |
| Letter from India Tyre & Rubber Company discussing tyre performance, wear, and sizing for the T.T. Race. | 20th Sep 1935 | Box 30 \ 5 Scan121 | |
| Letter from India Tyre & Rubber Company regarding the effect of smaller tyres on unsprung weight and performance. | 20th Sep 1935 | Box 30 \ 5 Scan122 | |
| Letter discussing the results of vehicle body testing on the Continent and plans for further tests and tyre trials. | 21th Sep 1935 | Box 30 \ 5 Scan123 | |
| Letter from India Tyre & Rubber Co. regarding the despatch, testing, and design modifications of Super Tyres. | 21th Sep 1935 | Box 30 \ 5 Scan124 | |
| Page 2 of a letter from India Tyre & Rubber Company Limited regarding tyre noise. | 21th Sep 1935 | Box 30 \ 5 Scan125 | |
| Letter from India Tyre & Rubber Company Ltd. concerning the supply of six tyres for testing on a new chassis. | 21th Sep 1935 | Box 30 \ 5 Scan126 | |
| Letter concerning the supply of tyres as original equipment for a new chassis. | 21th Sep 1935 | Box 30 \ 5 Scan127 | |
| Letter from India Tyre & Rubber Company Ltd. confirming the dispatch of tyres for experimental purposes. | 23th Sep 1935 | Box 30 \ 5 Scan128 | |
| Letter to The Earl of Rothes at India Tyre & Rubber Co. regarding the testing of 7 x 18' tyres. | 26th Sep 1935 | Box 30 \ 5 Scan129 | |
| Letter discussing the choice of tyre sizes, gear ratios, and ride experience with different tyres. | 26th Sep 1935 | Box 30 \ 5 Scan130 | |
| Letter from India Tyre & Rubber Company Ltd. concerning the performance of 7.00-18 tyres and a proposed meeting at the Motor Show. | 27th Sep 1935 | Box 30 \ 5 Scan131 | |
| Letter to W.A. Robotham discussing fitting India tyres to a chassis for the Olympia Motor Show. | 27th Sep 1935 | Box 30 \ 5 Scan132 | |
| Letter discussing the choice between India and Dunlop tyres for a new chassis to be displayed at the Motor Show. | 1st Oct 1935 | Box 30 \ 5 Scan133 | |
| Tyre noise issues on the Spectre model, comparing Dunlop with India tyres. | 1st Oct 1935 | Box 30 \ 5 Scan134 | |
| Letter from India Tyre & Rubber Company discussing a lunch meeting and the potential fitment of their tyres to the 'Phantom 111' as Original Equipment. | 2nd Oct 1935 | Box 30 \ 5 Scan135 | |
| Internal despatch request for wheels, tyres and tubes to be sent to two addresses in France. | 3rd Oct 1935 | Box 30 \ 5 Scan136 | |
| Unacceptable noise from Dunlop tyres on the Phantom III car and plans to test alternatives. | 4th Oct 1935 | Box 30 \ 5 Scan137 | |
| Fitting India tyres to five of nine Phantom III cars for the Olympia exhibition. | 7th Oct 1935 | Box 30 \ 5 Scan138 | |
| Letter from a tyre manufacturer regarding tests and improvements to reduce tyre noise. | 7th Oct 1935 | Box 30 \ 5 Scan139 | |
| Page 2 of a letter from India Tyre & Rubber Company Ltd. regarding tyre noise testing. | 7th Oct 1935 | Box 30 \ 5 Scan140 | |
| Noise measurement tests for 'Speed Special' tyres at different speeds and inflation pressures. | 23th Oct 1935 | Box 30 \ 5 Scan141 | |
| Order for tyres and tubes for a Cadillac Chassis. | 23th Oct 1935 | Box 30 \ 5 Scan142 | |
| The effect of 'Super' India Tyres on engine revs and speedometer calibration for Bentley Chassis B-1-CW. | 30th Oct 1935 | Box 30 \ 5 Scan143 | |
| Invoice from India Tyre & Rubber Co. Ltd. for tyres supplied for experimental purposes, seeking authorisation for payment. | 1st Nov 1935 | Box 30 \ 5 Scan144 | |
| Request to place an official order for six 7.00 x 18 India New Super Covers. | 1st Nov 1935 | Box 30 \ 5 Scan145 | |
| Letter from a tyre company enquiring about progress on the issue of tyre silence. | 6th Nov 1935 | Box 30 \ 5 Scan146 | |
| Letter to the Earl of Rothes at The India Tyre & Rubber Co. Ltd. discussing findings on tyre noise. | 7th Oct 1935 | Box 30 \ 5 Scan147 | |
| Investigation into objectionable tyre noise on the Phantom III car, comparing it to the Phantom II and testing various tyre makes. | 7th Oct 1935 | Box 30 \ 5 Scan148 | |
| Tyre noise, its relationship with wear, and comparison tests on different wheels. | 7th Oct 1935 | Box 30 \ 5 Scan149 | |
| Summary of test results showing factors affecting tyre noise with comparative noise percentages. | 7th Oct 1935 | Box 30 \ 5 Scan150 | |
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