| Description | Date | Identifier | |
| Correspondence with The Adamant Engineering Co. Ltd. regarding a drop arm and gear dimensions. | 24th Mar 1936 | Box 153 \ 2 scan0016 | |
| Letter from Adamant Engineering Company regarding the completion of an experimental steering gear and requesting further information. | 24th Mar 1936 | Box 153 \ 2 scan0017 | |
| Letter from Adamant Engineering Company Limited regarding the inspection of a steering gear assembly and requesting a drawing of the Drop Arm. | 25th Mar 1936 | Box 153 \ 2 scan0018 | |
| Letter from Adamant Engineering confirming receipt of correspondence and discussing work on Drop Arm Ex.21856. | 25th Mar 1936 | Box 153 \ 2 scan0019 | |
| Dispatch request for one Bishop Steering to be sent to Cam Gear Ltd. | 27th Mar 1936 | Box 153 \ 2 scan0020 | |
| Letter to Cam Gears Ltd. returning a tested Bishop steering part with performance feedback. | 27th Mar 1936 | Box 153 \ 2 scan0021 | |
| Letter from Cam Gears Ltd. regarding a returned steering gear, advising against its use for a road test. | 30th Mar 1936 | Box 153 \ 2 scan0022 | |
| Requesting payment approval for an invoice from the Adamant Engineering Company for a steering gear. | 23th Apr 1936 | Box 153 \ 2 scan0023 | |
| Authorising payment of an invoice from the Adamant Engineering Co. | 24th Apr 1936 | Box 153 \ 2 scan0024 | |
| Clarifying design points for the Marles Steering system on Phantom III, 25/30 HP, and Wraith II models. | 5th May 1936 | Box 153 \ 2 scan0025 | |
| Steering wheel attachment and modifications for the Wraith II steering box. | 5th May 1936 | Box 153 \ 2 scan0026 | |
| Clarifying design points for the Marles Steering system on various car models. | 5th May 1936 | Box 153 \ 2 scan0027 | |
| Technical memo discussing the steering wheel attachment and the Wraith II Steering Box. | 14th May 1936 | Box 153 \ 2 scan0028 | |
| Official order for 3 cams and 3 rollers for a Wraith, order number 54127. | 14th May 1936 | Box 153 \ 2 scan0029 | |
| Letter to The Adamant Engineering Co. Ltd. requesting the supply of experimental steering gear parts. | 14th May 1936 | Box 153 \ 2 scan0030 | |
| Letter from Adamant Engineering Company regarding the design of special Cams and Rollers. | 16th May 1936 | Box 153 \ 2 scan0031 | |
| Letter to Adamant Engineering Co. Ltd. requesting remarks on the design of special cams and rollers. | 18th May 1936 | Box 153 \ 2 scan0032 | |
| Letter from Adamant Engineering Company regarding drawings and a design suggestion for a Cam and Roller. | 18th May 1936 | Box 153 \ 2 scan0033 | |
| Letter from Adamant Engineering Company regarding manufacturing difficulties with a Cam specification. | 19th May 1936 | Box 153 \ 2 scan0034 | |
| Failure in the Marles steering cam wheel bearing and proposing design modifications for the Wraith II. | 19th May 1936 | Box 153 \ 2 scan0035 | |
| Letter from Adamant Engineering Company, Ltd. regarding previous correspondence. | 19th May 1936 | Box 153 \ 2 scan0036 | |
| Letter from Adamant Engineering Company confirming a meeting appointment with Mr. J. F. Hardy. | 21th May 1936 | Box 153 \ 2 scan0037 | |
| Letter to The Adamant Engineering Co. Ltd confirming a request for a special steering cam and rollers. | 27th May 1936 | Box 153 \ 2 scan0038 | |
| Request to send an official order to Adamant Engineering Co. for a special steering cam and rollers for experimental work. | 27th May 1936 | Box 153 \ 2 scan0039 | |
| Letter from Adamant Engineering Company regarding the inability to modify an order of rollers for a 25/30 car. | 27th May 1936 | Box 153 \ 2 scan0040 | |
| Letter from Adamant Engineering Company confirming the production of a special 25 HP Steering Cam and rollers. | 28th May 1936 | Box 153 \ 2 scan0041 | |
| Letter to a supplier regarding the specifications and accuracy of rollers and cam bores. | 29th May 1936 | Box 153 \ 2 scan0042 | |
| Table of mean diameter measurements for the bore of 25 HP steering cams. | 3rd Jun 1936 | Box 153 \ 2 scan0043 | |
| Letter from Adamant Engineering discussing manufacturing tolerances and production issues related to cam bores. | 3rd Jun 1936 | Box 153 \ 2 scan0044 | |
| Letter to F.J. Hardy discussing the high cost and difficulty of manufacturing Cams to very fine limits. | 8th Jun 1936 | Box 153 \ 2 scan0045 | |
| Visit to Adamant Engineering Co. concerning a ball bearing failure in a steering component. | 8th Jun 1936 | Box 153 \ 2 scan0046 | |
| The manufacturing accuracy of cams, the process for steering tubes, and proposed improvements for 25/30 HP rollers. | 8th Jun 1936 | Box 153 \ 2 scan0047 | |
| Letter to Adamant Engineering Co. Ltd. regarding the return of faulty cams and rollers. | 15th Jun 1936 | Box 153 \ 2 scan0048 | |
| Request to return faulty Wraith steering parts to Adamant Engineering Co. Ltd. | 15th Jun 1936 | Box 153 \ 2 scan0049 | |
| Letter from Adamant Engineering Company regarding an error in the manufacture of cams and rollers, and arranging for replacements. | 16th Jun 1936 | Box 153 \ 2 scan0050 | |
| Request to return two faulty Wraith Steering Cams to Adamant Engineering Co. Ltd. for replacement. | 17th Jun 1936 | Box 153 \ 2 scan0051 | |
| Letter to Adamant Engineering Co. Ltd. urgently requesting the delivery of a steering cam and rollers. | 22th Jun 1936 | Box 153 \ 2 scan0052 | |
| Letter from Adamant Engineering Company regarding manufacturing issues with cams and rollers for order 17800. | 23th Jun 1936 | Box 153 \ 2 scan0053 | |
| Letter from Adamant Engineering Company regarding incorrectly manufactured replacement Cams. | 26th Jun 1936 | Box 153 \ 2 scan0054 | |
| Letter from Adamant Engineering Company regarding unsatisfactory rollers and the production of replacements. | 13th Jul 1936 | Box 153 \ 2 scan0055 | |
| Concluding page of a letter from Adamant Engineering Company, Ltd. | 13th Jul 1936 | Box 153 \ 2 scan0056 | |
| Technical drawing for a Roller (Lead .7'). | 16th May 1936 | Box 153 \ 2 scan0057 | |
| Engineering drawing for a Roller (Lead .7'). | 16th May 1936 | Box 153 \ 2 scan0058 | |
| Engineering drawing for a toothed and grooved roller. | 23th Aug 1935 | Box 153 \ 2 scan0059 | |
| Letter to Adamant Engineering Co. Ltd. regarding the production and improvement of steering gear parts. | 14th Jul 1936 | Box 153 \ 2 scan0060 | |
| Letter to The Adamant Engineering Co. Ltd. concerning the supply and manufacturing tolerances of roller followers. | 15th Jul 1936 | Box 153 \ 2 scan0061 | |
| Letter from Adamant Engineering acknowledging correspondence and awaiting prints for a Ransome & Marles proposal. | 16th Jul 1936 | Box 153 \ 2 scan0062 | |
| Letter from Adamant Engineering Company regarding the production of rollers, drawing revisions, and proposed improvements. | 15th Jul 1936 | Box 153 \ 2 scan0063 | |
| Requesting an official order be sent to Adamant Engineering Co. Ltd. for 15 Roller Followers. | 17th Jul 1936 | Box 153 \ 2 scan0064 | |
| Letter to Adamant Engineering Co. Ltd. regarding specifications for grinding ball race tracks on a roller follower. | 17th Jul 1936 | Box 153 \ 2 scan0065 | |
| Request for 15 rollers to F.61281 and a notification of works closure. | 17th Jul 1936 | Box 153 \ 2 scan0066 | |
| Payment approval for an invoice from Adamant Eng. Co.Ltd for a special steering cam and rollers. | 17th Jul 1936 | Box 153 \ 2 scan0067 | |
| Letter from Adamant Engineering Company regarding drawings for rollers and tracks, proposing a new grinding fixture. | 18th Jul 1936 | Box 153 \ 2 scan0068 | |
| Letter from Adamant Engineering Company Limited regarding manufacturing suggestions for a roller part. | 3rd Aug 1936 | Box 153 \ 2 scan0069 | |
| Letter to Adamant Engineering Co. Ltd. regarding grinding specifications for 15 rollers. | 3rd Aug 1936 | Box 153 \ 2 scan0070 | |
| Internal memorandum authorising the payment of an invoice for £13.2.0d. | 4th Aug 1936 | Box 153 \ 2 scan0071 | |
| Letter to a supplier regarding the grinding of steering rollers for the 25/30 HP model, enclosing relevant drawings. | 4th Aug 1936 | Box 153 \ 2 scan0072 | |
| Letter from Ransome & Marles Bearing Co. regarding steering gear components. | 5th Aug 1936 | Box 153 \ 2 scan0073 | |
| Page 2 of a follow-up letter from Ransome & Marles Bearing Co. Ltd. concerning a discussion about gear sizes. | 5th Aug 1936 | Box 153 \ 2 scan0074 | |
| Quotation from Ransome & Marles Bearing Co., Ltd. for fifteen sets of steering gear components. | 5th Aug 1936 | Box 153 \ 2 scan0075 | |
| The dispatch of two Phantom III steering roller followers for external examination and report. | 5th Aug 1936 | Box 153 \ 2 scan0076 | |
| Letter to Adamant Engineering Co. Ltd. concerning premature wear on a roller follower for a steering gear. | 5th Aug 1936 | Box 153 \ 2 scan0077 | |
| Request to modify a 1 7/16 gear for a Bentley to incorporate an outboard bearing and to provide a corresponding print. | 5th Aug 1936 | Box 153 \ 2 scan0078 | |
| Issue with Marles Steering and a proposed design modification to the cover. | 7th Aug 1936 | Box 153 \ 2 scan0079 | |
| Letter from a supplier discussing the hardness and case depth of a steering gear roller component. | 7th Aug 1936 | Box 153 \ 2 scan0080 | |
| Page 2 of a letter from Ransome & Marles Bearing Co. regarding the examination of case depth and loading on a tooth form. | 7th Aug 1936 | Box 153 \ 2 scan0081 | |
| Letter from Adamant Engineering Company confirming progress on order O/21130 and requesting dispatch instructions. | 10th Aug 1936 | Box 153 \ 2 scan0082 | |
| Letter from Adamant Engineering regarding the examination of a faulty roller and a query about modifying a steering gear. | 11th Aug 1936 | Box 153 \ 2 scan0083 | |
| Letter from Adamant Engineering Company Limited requesting further instructions regarding new parts. | 14th Aug 1936 | Box 153 \ 2 scan0084 | |
| Letter to Adamant Engineering concerning an order for rollers and issues with faulty case hardening. | 14th Aug 1936 | Box 153 \ 2 scan0085 | |
| Letter to Ransome & Marles Bearing Co. Ltd. regarding the load specifications for steering rollers. | 14th Aug 1936 | Box 153 \ 2 scan0086 | |
| Letter from Adamant Engineering Co. Ltd. enclosing a blueprint of a gear with outboard bearing, which was omitted from a previous correspondence. | 17th Aug 1936 | Box 153 \ 2 scan0087 | |
| Modification to the Marles Steering system regarding a tapping hole. | 17th Aug 1936 | Box 153 \ 2 scan0088 | |
| Cause of steering inefficiency and wandering in car model GUL-1, with recommendations for improvement. | 18th Aug 1936 | Box 153 \ 2 scan0089 | |
| Investigation report into a complaint of dangerous steering on chassis GUL-1, with comparative measurements. | 18th Jun 1936 | Box 153 \ 2 scan0090 | |
| Considering the likely cause of a feeling of stickiness in a component. | 18th Aug 1936 | Box 153 \ 2 scan0091 | |
| Letter from Ransome & Marles Bearing Co. regarding the steering cam roller assembly, discussing torque and pre-loading. | 21th Aug 1936 | Box 153 \ 2 scan0092 | |
| Letter from Ransome & Marles Bearing Co. Ltd. discussing a load figure and indentation avoidance. | 21th Aug 1936 | Box 153 \ 2 scan0093 | |
| Telegram chasing an outstanding order for fifteen rollers. | 24th Aug 1936 | Box 153 \ 2 scan0094 | |
| Follow-up letter from Ransome & Marles Bearing Co. regarding the analysis of a sectioned steering gear roller. | 24th Aug 1936 | Box 153 \ 2 scan0095 | |
| Letter from Ransome & Marles Bearing Co. regarding a recommendation on component condition, page 2. | 24th Aug 1936 | Box 153 \ 2 scan0096 | |
| Agreements with Mr Maltravers regarding the manufacturing and testing of Marles Steerings cams. | 28th Aug 1936 | Box 153 \ 2 scan0097 | |
| The despatch of a Phantom III Steering Box to the Adamant Co. and an assessment of its cam. | 2nd Sep 1936 | Box 153 \ 2 scan0098 | |
| Despatch note requesting a Phantom III Steering Box to be sent to Messrs. Adamant Co. | 3rd Sep 1936 | Box 153 \ 2 scan0099 | |
| Request to place an official order with Ransome & Marles Bearing Co. for finishing, supplying, and grinding various bearing components for a 25/30 HP model. | 7th Sep 1936 | Box 153 \ 2 scan0100 | |
| Internal request to place an official order for a Marles Steering gear from the Adamant Engineering Co. | 7th Sep 1936 | Box 153 \ 2 scan0101 | |
| Letter to The Adamant Engineering Co. Ltd. regarding the supply of experimental cams and rollers for a chassis. | 8th Sep 1936 | Box 153 \ 2 scan0102 | |
| Request to place an official order with Adamant Engineering Co. Ltd. for modified cams and a roller for Ph.III Steering. | 8th Sep 1936 | Box 153 \ 2 scan0103 | |
| Letter to The Adamant Engineering Co. Ltd. regarding production issues caused by the eccentricity of roller followers. | 10th Sep 1936 | Box 153 \ 2 scan0104 | |
| Letter from Ransome & Marles Bearing Co. regarding proposals to modify the Steering Cam Roller Assembly for increased capacity. | 10th Sep 1936 | Box 153 \ 2 scan0105 | |
| Letter from Adamant Engineering concerning the manufacture of a Cam and Roller, noting a specification discrepancy and delivery timings. | 11th Sep 1936 | Box 153 \ 2 scan0106 | |
| Page 2 of a letter from Adamant Engineering Company regarding the manufacture of ball bearing rollers. | 11th Sep 1936 | Box 153 \ 2 scan0107 | |
| Letter from Adamant Engineering Company regarding the eccentricity of supplied rollers for steering gears. | 12th Sep 1936 | Box 153 \ 2 scan0108 | |
| Letter to Adamant Engineering Co. Ltd. discussing tolerance limits for the eccentricity of rollers. | 21th Sep 1936 | Box 153 \ 2 scan0109 | |
| F.O.C. invoice for a Cam from Adamant Engineering Co. Ltd. | 22th Sep 1936 | Box 153 \ 2 scan0110 | |
| Clarifying an invoice for a Cam part, stating it was not ordered by or connected to the Experimental Department. | 23th Sep 1936 | Box 153 \ 2 scan0111 | |
| Letter from Adamant Engineering Company regarding a revised order for rollers and manufacturing tools. | 23th Sep 1936 | Box 153 \ 2 scan0112 | |
| Letter to Adamant Engineering Co. Ltd. about grinding races for the 25/30 and Phantom III steering gears. | 29th Sep 1936 | Box 153 \ 2 scan0113 | |
| Letter to Adamant Engineering Co. Ltd. about making direct arrangements with Messrs. Ransome & Marles. | 29th Sep 1936 | Box 153 \ 2 scan0114 | |
| The transfer of 25/30 HP steering rollers to Messrs. Ransome & Marles for grinding. | 1st Oct 1936 | Box 153 \ 2 scan0115 | |
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