| Description | Date | Identifier | |
| Booklet for the Marles-Weller patent steering gear. | 12th Oct 1932 | Box 28 \ 2 Scan078 | |
| Letter to The Adamant Eng. Co. regarding a pendulum lever, a drawing, and the progress of a steering box. | 12th Oct 1932 | Box 28 \ 2 Scan079 | |
| Letter from Adamant Engineering Company regarding the receipt of drawing F.79770, the arrival of a drop arm stamping, and the delivery of steering gear. | 13th Oct 1932 | Box 28 \ 2 Scan080 | |
| Letter to Cam Gears Ltd enquiring about their Bishop steering gear for use on a Phantom II car. | 17th Oct 1932 | Box 28 \ 2 Scan081 | |
| Promotional letter from Burman & Sons Ltd. regarding their new Burman-Douglas steering gears. | 17th Oct 1932 | Box 28 \ 2 Scan082 | |
| Letter from Cam Gears Ltd. regarding an enquiry for Bishop Patent Steering Gear for the Phantom II Model. | 18th Oct 1932 | Box 28 \ 2 Scan083 | |
| Letter from Adamant Engineering Company regarding the despatch of a 'Q' type Marles-Weller Steering Gear. | 19th Oct 1932 | Box 28 \ 2 Scan084 | |
| Letter from Adamant Engineering Company regarding a manufacturing issue with a Marles-Weller Steering Gear drop arm. | 20th Oct 1932 | Box 28 \ 2 Scan085 | |
| Letter to Messrs Burman & Sons Ltd declining interest in their new Burman-Douglas Steering Gear. | 26th Oct 1932 | Box 28 \ 2 Scan086 | |
| Letter from Adamant Engineering Company regarding the supply of a second drop arm and following up on testing for the Marles-Weller Steering gear. | 5th Nov 1932 | Box 28 \ 2 Scan087 | |
| Letter to Adamant Engineering Co. Ltd. acknowledging receipt of a drop arm and advising of upcoming road tests. | 8th Nov 1932 | Box 28 \ 2 Scan088 | |
| Letter from CAM GEARS LTD. regarding their Bishop Patent Steering Gear, following up on previously sent information. | 10th Nov 1932 | Box 28 \ 2 Scan089 | |
| Letter from Adamant Engineering Company Limited acknowledging correspondence and discussing the road testing of a gear. | 12th Nov 1932 | Box 28 \ 2 Scan090 | |
| Letter to Cam Gears Ltd. regarding the testing of a Bishop steering system and requesting measured efficiency curve data. | 21th Nov 1932 | Box 28 \ 2 Scan091 | |
| Letter from Cam Gears Ltd. concerning the manufacture of a trial steering gear based on blueprints. | 22th Nov 1932 | Box 28 \ 2 Scan092 | |
| Letter from Cam Gears Ltd. regarding modifications to a steering gear box and efficiency tests of a Bishop gear. | 22th Nov 1932 | Box 28 \ 2 Scan093 | |
| Request for a support bracket and pendulum lever for a Bishop steering system being made for Bensport. | 24th Nov 1932 | Box 28 \ 2 Scan094 | |
| Letter to Cam Gears Ltd. regarding the supply of steering column drawings and parts. | 24th Nov 1932 | Box 28 \ 2 Scan095 | |
| Letter to Adamant Engineering providing feedback on road tests of their steering system, noting faults with the gear ratio and slack. | 28th Nov 1932 | Box 28 \ 2 Scan096 | |
| Bensport Steering system, requesting a dashboard bracket. | 29th Nov 1932 | Box 28 \ 2 Scan097 | |
| Letter from Adamant Engineering discussing the gear ratio and helix angle of a sample Marles-Weller steering gear. | 29th Nov 1932 | Box 28 \ 2 Scan098 | |
| Letter from Adamant Engineering Company regarding testing a car and the adoption of a steering system. | 29th Nov 1932 | Box 28 \ 2 Scan099 | |
| Copy of telegrams regarding a meeting to discuss steerings. | 29th Nov 1932 | Box 28 \ 2 Scan100 | |
| Letter from Adamant Engineering Company regarding a test and order for a Marles-Weller steering gear. | 1st Dec 1932 | Box 28 \ 2 Scan101 | |
| The testing, purchase, and re-ordering of a steering component from Adamant Engineering Co. Ltd. | 2nd Dec 1932 | Box 28 \ 2 Scan102 | |
| Letter to Adamant Engineering Co. Ltd. regarding the despatch of a pendulum lever for a steering box. | 12th Dec 1932 | Box 28 \ 2 Scan103 | |
| Letter to The Adamant Engineering Co. Ltd. regarding the machining of a drop arm and return of a steering gear. | 14th Dec 1932 | Box 28 \ 2 Scan104 | |
| Letter from Cam Gears Ltd. proposing new steering gear options and comparison tests. | 15th Dec 1932 | Box 28 \ 2 Scan105 | |
| Continuation sheet of a letter from Cam Gears Ltd. discussing efficiency curves and the Bishop Gear. | 15th Dec 1932 | Box 28 \ 2 Scan106 | |
| Graph plotting Reversibility % against Torque on Drop Arm for two different cam gear ratios. | 8th Dec 1932 | Box 28 \ 2 Scan107 | |
| Letter from Adamant Engineering Company acknowledging receipt of a drop arm and noting a discrepancy in its length before proceeding with machining. | 16th Dec 1932 | Box 28 \ 2 Scan108 | |
| Letter to Cam Gears Ltd. regarding the testing and supply of steering gear for a 20 HP model. | 16th Dec 1932 | Box 28 \ 2 Scan109 | |
| Letter from Cam Gears Ltd. explaining the testing methodology for their steering gear. | 20th Dec 1932 | Box 28 \ 2 Scan110 | |
| Continuation sheet from CAM GEARS LTD. comparing the benefits of their gear system against competitor gears. | 20th Dec 1932 | Box 28 \ 2 Scan111 | |
| Sketch showing the method of testing Bishop steering gear for reversibility. | 20th Dec 1932 | Box 28 \ 2 Scan112 | |
| Letter from Cam Gears Ltd. regarding a proposed Bishop Steering Gear replacement, blueprint SK 477, and necessary alterations. | 31th Dec 1932 | Box 28 \ 2 Scan113 | |
| Letter from Cam Gears Ltd. concerning the specifications of a stator tube for a central control unit. | 31th Dec 1932 | Box 28 \ 2 Scan114 | |
| Letter to Cam Gears Limited discussing blueprint specifications for a steering column. | 5th Jan 1933 | Box 28 \ 2 Scan115 | |
| Letter from Cam Gears Ltd. confirming dimensional changes to a steering column. | 6th Jan 1933 | Box 28 \ 2 Scan116 | |
| Letter to the Adamant Engineering Co. about steering endurance tests, invoice queries, and considering a new Marles Weller steering gear. | 16th Jan 1933 | Box 28 \ 2 Scan117 | |
| Letter from Adamant Engineering Company regarding the supply, testing, and cost of sample Marles-Weller steering gears. | 19th Jan 1933 | Box 28 \ 2 Scan118 | |
| Letter from Adamant Engineering Company regarding the correct size of steering gear and enclosed drawings. | 23th Jan 1933 | Box 28 \ 2 Scan119 | |
| Confirming a satisfactory explanation for queried invoices and authorizing them for payment. | 23th Jan 1933 | Box 28 \ 2 Scan120 | |
| Letter to The Adamant Eng. Co, Ltd regarding the suitability of their smaller gear for a car. | 30th Jan 1933 | Box 28 \ 2 Scan121 | |
| Blueprint graph showing the efficiency of a Marles Weller steering system for a Phantom II before and after a bumper test. | 31th Jan 1933 | Box 28 \ 2 Scan122 | |
| Page with a handwritten reference number and a company date stamp. | 8th Feb 1933 | Box 28 \ 2 Scan123 | |
| Follow-up letter from Adamant Engineering Company regarding drawings for J Type Steering Gear. | 30th Jan 1933 | Box 28 \ 2 Scan124 | |
| Letter from Adamant Engineering Company in response to a query about the suitability of a proposed gear. | 31th Jan 1933 | Box 28 \ 2 Scan125 | |
| Request to complete the machining on a steering bracket for Bensport and despatch the parts to Cam Gears Ltd, Luton. | 1st Feb 1933 | Box 28 \ 2 Scan126 | |
| Requesting to inspect and take dimensions of a Marle's Weller Steering box when it is pulled down. | 7th Feb 1933 | Box 28 \ 2 Scan127 | |
| Examination report on the condition of a Marles Steering Gear after being stripped from a chassis. | 2nd Mar 1933 | Box 28 \ 2 Scan128 | |
| Letter to The Adamant Eng. Co. regarding the failure of a steering hemisphere during an endurance test. | 4th Feb 1933 | Box 28 \ 2 Scan129 | |
| Letter from Adamant Engineering Company regarding a report on 'Q' type Marles-Weller Steering gear and a test on a Bumper machine. | 7th Feb 1933 | Box 28 \ 2 Scan130 | |
| Letter to The Adamant Eng. Co. regarding road testing their second steering gear and comparing bumping test results. | 8th Feb 1933 | Box 28 \ 2 Scan131 | |
| The concluding page of a letter addressed to Adamant Eng. Co. | 5th Feb 1936 | Box 28 \ 2 Scan132 | |
| Telegram chasing the despatch of a steering gear part. | 5th Feb 1936 | Box 28 \ 2 Scan133 | |
| Letter from Adamant Engineering Company regarding the urgent return of a steering gear for examination. | 10th Feb 1933 | Box 28 \ 2 Scan134 | |
| Postscript to a letter concerning a delay in the arrival of steering equipment. | 10th Feb 1933 | Box 28 \ 2 Scan135 | |
| Copy of a telegram sent from Adamant Engineering Company to Rolls-Royce regarding a non-arrived steering gear. | 10th Feb 1933 | Box 28 \ 2 Scan136 | |
| Letter to Cam Gears Ltd regarding a delay in sending parts and a request for two rocker shafts. | 10th Feb 1933 | Box 28 \ 2 Scan137 | |
| Letter to Adamant Engineering Co, Ltd, regarding a delay in despatching a steering component for examination. | 11th Feb 1933 | Box 28 \ 2 Scan138 | |
| Letter from Adamant Engineering Company regarding the return of a Steering Gear and Drop Arm. | 13th Feb 1933 | Box 28 \ 2 Scan139 | |
| Letter from CAM GEARS LTD regarding the supply of steering gear components including rocker shafts. | 15th Feb 1933 | Box 28 \ 2 Scan140 | |
| Request to send Bishop steering gear parts to Cam Gears Ltd, for the attention of Mr. Pentony. | 16th Feb 1933 | Box 28 \ 2 Scan141 | |
| Letter from Adamant Engineering Company regarding the examination and modification of a Marles-Weller Steering Gear. | 15th Feb 1933 | Box 28 \ 2 Scan142 | |
| The examination of a steering gear, detailing findings on bearings, shake, and a loose flange. | 15th Feb 1933 | Box 28 \ 2 Scan143 | |
| Concluding page of a letter from Adamant Engineering Company Limited. | 15th Feb 1933 | Box 28 \ 2 Scan144 | |
| Letter from Cam Gears Ltd. requesting a steering wheel to assist in machining a steering gear column. | 22th Feb 1933 | Box 28 \ 2 Scan145 | |
| Measurements of slack in a Marles Weller steering system over various time intervals. | 23th Feb 1933 | Box 28 \ 2 Scan146 | |
| Results of a 50-hour test on a Marles steering gear fitted to a Phantom II chassis. | 28th Feb 1933 | Box 28 \ 2 Scan147 | |
| Agreeing to manufacture and test a set of parts for the Marles Steering Gear. | 1st Mar 1933 | Box 28 \ 2 Scan148 | |
| General arrangement drawing of an R1 type Marles steering gear. | 20th Jul 1925 | Box 28 \ 2 Scan149 | |
| Follow-up letter from Cam Gears Ltd. requesting a steering wheel to complete the machining of a steering gear column. | 2nd Mar 1933 | Box 28 \ 2 Scan150 | |
| Letter to Cam Gears Ltd regarding a steering wheel and untraced correspondence. | 3rd Mar 1923 | Box 28 \ 2 Scan151 | |
| Requesting to send a steering wheel to Messrs Cam Gears Ltd for a Bishop steering system for Bensport. | 3rd Mar 1933 | Box 28 \ 2 Scan152 | |
| Letter from Cam Gears Ltd. regarding the machining of a column to accurately fit a supplied steering wheel. | 6th Mar 1933 | Box 28 \ 2 Scan153 | |
| Letter from Cam Gears Ltd. regarding a delay in returning a sample steering gear. | 13th Apr 1933 | Box 28 \ 2 Scan154 | |
| Comparing the performance of the Marles Weller R.R. Elliott type steering system against a standard system. | 20th Mar 1933 | Box 28 \ 2 Scan155 | |
| Characteristics of Marles steering gear and recommending specific settings for helix angle and box ratio. | 20th Mar 1933 | Box 28 \ 2 Scan156 | |
| Letter from Cam Gears Ltd. regarding a sample Bishop Steering Gear sent for testing purposes. | 20th Mar 1933 | Box 28 \ 2 Scan157 | |
| Letter to Cam Gears Ltd regarding the receipt and planned testing of a Bishop steering gear. | 22th Mar 1933 | Box 28 \ 2 Scan158 | |
| Inquiry about the result of a set of parts made up for the Marles Steering Gear. | 22th Mar 1933 | Box 28 \ 2 Scan159 | |
| Confirming the manufacturing status and expected completion date for Marles Steering Gear parts. | 25th Mar 1933 | Box 28 \ 2 Scan160 | |
| Tests on Bishop steering gear and a comparison with Marles Weller steering. | 27th Mar 1933 | Box 28 \ 2 Scan161 | |
| The efficiency tests conducted on a Bishop steering gear and an issue found upon dismantling. | 27th Mar 1933 | Box 28 \ 2 Scan162 | |
| Data table showing forward and reverse steering efficiency calculations. | 28th Mar 1933 | Box 28 \ 2 Scan163 | |
| Letter to Cam Gears Ltd discussing the efficiency, ratios and potential modifications of a steering gear. | 28th Mar 1933 | Box 28 \ 2 Scan164 | |
| Letter from Cam Gears Ltd. regarding the return of a steering gear for alteration. | 29th Mar 1933 | Box 28 \ 2 Scan165 | |
| Request to send a Bishop steering lever and spare rocker shaft to Cam Gears Ltd. for ratio alteration. | 30th Mar 1933 | Box 28 \ 2 Scan166 | |
| The despatch of a Bishop Steering Gear and Spare Rocker Shaft to Cam Gears Ltd for ratio alteration. | 30th Mar 1933 | Box 28 \ 2 Scan167 | |
| Letter to Cam Gears Ltd. regarding the return of a Bishop Steering with an altered ratio. | 12th Apr 1933 | Box 28 \ 2 Scan168 | |
| Letter from Adamant Engineering Company inquiring about the progress of tests on Marles-Weller Steering samples. | 25th Apr 1933 | Box 28 \ 2 Scan169 | |
| Letter to Adamant Engineering Co. Ltd. providing feedback on the performance of their steering with tempered pads. | 26th Apr 1933 | Box 28 \ 2 Scan170 | |
| Letter from Adamant Engineering Company regarding the hardness of tempered hemispheres for steering gears. | 27th Apr 1933 | Box 28 \ 2 Scan171 | |
| Letter from Adamant Engineering Company Limited proposing a follow-up meeting regarding a test. | 27th Apr 1933 | Box 28 \ 2 Scan172 | |
| Letter to Adamant Engineering regarding steering gear for a new Bentley car. | 1st May 1933 | Box 28 \ 2 Scan173 | |
| Data for Weller steering for the Bentley. | 1st May 1933 | Box 28 \ 2 Scan174 | |
| Letter from Adamant Engineering Company regarding the selection of a suitable steering gear for a Bentley car, discussing different gear types and referencing drawings. | 2nd May 1933 | Box 28 \ 2 Scan175 | |
| Letter from Adamant Engineering Company discussing gear specifications, efficiency, and offering sample parts. | 2nd May 1933 | Box 28 \ 2 Scan176 | |
| Testing and comparison of a new Bishop steering gear against other models. | 9th May 1933 | Box 28 \ 2 Scan177 | |
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