| Description | Date | Identifier | |
| Letter from Donald Sessions & Co. Ltd. regarding the standardization, modification, and supply of D.W.S. Permanent Jacks. | 2nd Jan 1934 | Box 139 \ 2 scan0006 | |
| The 10,000-mile trial and planned standardisation of D.W.S. Jacks for the C.2 Series. | 3rd Jan 1934 | Box 139 \ 2 scan0007 | |
| Letter from S. Smith & Sons suggesting a design modification for the rear fixing brackets for Jackalls. | 4th Jan 1934 | Box 139 \ 2 scan0008 | |
| Order for a set of D.W.S. Jacks for a 20/25 HP car. | 5th Jan 1934 | Box 139 \ 2 scan0009 | |
| Letter to Donald Sessions & Co, Ltd. regarding modifications for 20/25 HP Jacks and specifications for a 40/50 sample Jack. | 5th Jan 1934 | Box 139 \ 2 scan0010 | |
| Letter to Donald Sessions & Co. Ltd. requesting a set of jacks for a 10,000-mile trial car. | 5th Jan 1934 | Box 139 \ 2 scan0011 | |
| Letter from Donald Sessions & Company Ltd. regarding a set of jacks for a 10,000 mile test on a 20/25 HP car. | 8th Jan 1934 | Box 139 \ 2 scan0012 | |
| Letter from Donald Sessions & Company Ltd. regarding the standardization and supply of permanent jacks for 20/25 HP cars. | 8th Jan 1934 | Box 139 \ 2 scan0013 | |
| The standardisation of the D.W.S. 2-Speed Jack Handle. | 13th Jan 1934 | Box 139 \ 2 scan0014 | |
| Letter to supplier Donald Sessions & Co. Ltd. regarding the supply and standardization of vehicle parts. | 13th Jan 1934 | Box 139 \ 2 scan0015 | |
| Letter to Donald Sessions & Co. Ltd. regarding the fitting of jacks and a 2-speed handle tag. | 15th Jan 1934 | Box 139 \ 2 scan0016 | |
| Letter from a supplier regarding a standardization order for 40/50 Jacks and the return of a sample Mark III Jack. | 15th Jan 1934 | Box 139 \ 2 scan0017 | |
| Letter to Donald Sessions & Co. Ltd. confirming the despatch of a Mark III Sample Jack. | 16th Jan 1934 | Box 139 \ 2 scan0018 | |
| Letter to S. Smith & Sons regarding a suggestion for fitting 'Jackalls' integral with spring pads, requesting a sketch for approval. | 16th Jan 1934 | Box 139 \ 2 scan0019 | |
| Inquiry about supplying a two-geared jack handle for the 20/25 HP model. | 13th Jan 1934 | Box 139 \ 2 scan0020 | |
| Query regarding the proposed standard supply of a two-geared jack handle for the 20/25 HP model. | 16th Jan 1934 | Box 139 \ 2 scan0021 | |
| Letter from Donald Sessions & Company Ltd. concerning the fitting of D.W.S. Jacks to cars. | 16th Jan 1934 | Box 139 \ 2 scan0022 | |
| Letter from S. Smith & Sons regarding experimentation and samples for a new Jack Bracket design. | 17th Jan 1934 | Box 139 \ 2 scan0023 | |
| The standardisation of D.W.S. jacks for the 20/25 HP C2 series. | 17th Jan 1934 | Box 139 \ 2 scan0024 | |
| Confirming the completion of a 10,000-mile test on D.W.S. Jacks for the 20/25 HP and their subsequent standardisation. | 18th Jan 1934 | Box 139 \ 2 scan0025 | |
| The fitting of Bentley Jack Pads to vehicle 4-B-IV. | 20th Jan 1934 | Box 139 \ 2 scan0026 | |
| Letter from S. Smith & Sons regarding a drawing for a 'Jackall' rear axle clamp and support bracket. | 24th Jan 1934 | Box 139 \ 2 scan0027 | |
| Letter to S. Smith & Sons about fitting a new bracket for 'Jackalls'. | 25th Jan 1934 | Box 139 \ 2 scan0028 | |
| Letter to a supplier detailing issues with a received set of 20/25 HP Jacks and requesting a replacement. | 29th Jan 1934 | Box 139 \ 2 scan0029 | |
| Letter detailing the return of a handle due to a sizing issue with the squares on the Jack Shafts. | 30th Jan 1934 | Box 139 \ 2 scan0030 | |
| Letter from Donald Sessions & Co Ltd regarding a specification misunderstanding for D.W.S. Jacks on a 20/25 HP car. | 30th Jan 1934 | Box 139 \ 2 scan0031 | |
| Letter from Donald Sessions & Company, Limited confirming the satisfactory position of the 20/25 HP Jacks. | 30th Jan 1934 | Box 139 \ 2 scan0032 | |
| Letter to S. Smith & Sons regarding a drawing of proposed rear 'Jackall' Jack Brackets submitted for approval. | 30th Jan 1934 | Box 139 \ 2 scan0033 | |
| Letter to Donald Sessions & Co. Ltd. clarifying a mistake in an order for 20/25 HP Jacks. | 31th Jan 1934 | Box 139 \ 2 scan0034 | |
| Letter from Donald Sessions & Co. Ltd. concerning an order for permanent jacks and the supply of new samples for the 40/50 and 20/25 HP cars. | 8th Feb 1934 | Box 139 \ 2 scan0035 | |
| Letter to Donald Sessions & Co. Ltd. regarding the supply and production of chassis jacks. | 10th Feb 1934 | Box 139 \ 2 scan0036 | |
| Standardisation of D.W.S. permanent jacks for the 20/25 HP chassis. | 14th Feb 1934 | Box 139 \ 2 scan0037 | |
| Decision to fit jacks as standard on the 20/25 HP car following satisfactory testing. | 4th Dec 1933 | Box 139 \ 2 scan0038 | |
| Letter from Donald Sessions & Company Ltd. regarding sending a sample 2-speed handle for D.W.S. Jacks on a 40/50 HP Chassis. | 12th Feb 1934 | Box 139 \ 2 scan0039 | |
| Questioning a cost increase of £3.7.8 related to a Standardisation Sheet for Permanent Jacks. | 13th Feb 1934 | Box 139 \ 2 scan0040 | |
| Letter from S. Smith & Sons regarding the fitting and performance of D.W.S. jacks on a 'Pantom 11' car. | 16th Feb 1934 | Box 139 \ 2 scan0041 | |
| Letter confirming the dispatch of a set of D.W.S. Permanent Jacks for standardization on 20/25 HP cars. | 19th Feb 1934 | Box 139 \ 2 scan0042 | |
| Standardisation of D.W.S. permanent jacks for the 20/25 HP chassis. | 22th Jan 1934 | Box 139 \ 2 scan0043 | |
| Standardisation of parts for a 2-Speed D.W.S. Jack Handle. | 22th Jan 1934 | Box 139 \ 2 scan0044 | |
| Letter to Donald Sessions & Co. Ltd. about the satisfactory performance of 20/25 HP chassis permanent jacks and the placing of an official order. | 24th Feb 1934 | Box 139 \ 2 scan0045 | |
| Requesting an opinion on fitting Jackall Jacks, submitted by Messrs. Smith & Sons, to Phantom II rear axles. | 27th Feb 1934 | Box 139 \ 2 scan0046 | |
| The difficulty of fitting Jackall Jacks onto a Phantom model due to spatial constraints. | 1st Mar 1934 | Box 139 \ 2 scan0047 | |
| Letter to S. Smith & Sons regarding fitting issues with Jackall Jacks on the Phantom II car. | 7th Mar 1934 | Box 139 \ 2 scan0048 | |
| Instructions for fitting D.W.S. Jacks to a 20/25 HP model. | 9th Mar 1934 | Box 139 \ 2 scan0049 | |
| Operational difficulties and user dissatisfaction with the D.W.S. jack. | 9th Mar 1934 | Box 139 \ 2 scan0050 | |
| Comparing the efficiency of D.W.S. jacks against Dunlop jacks. | 12th May 1934 | Box 139 \ 2 scan0051 | |
| Letter to Donald Sessions & Co. Ltd. requesting a 2-Speed Jack Handle for testing and information on modifications. | 13th Mar 1934 | Box 139 \ 2 scan0052 | |
| Letter from S. Smith & Sons regarding a design issue and requested exchange of a sample set of Jackall Jacks. | 9th Mar 1934 | Box 139 \ 2 scan0053 | |
| Letter to S. Smith & Sons regarding the testing of Jackall Jacks on a Phantom car. | 15th Mar 1934 | Box 139 \ 2 scan0054 | |
| Letter from a supplier concerning modifications to a car jack to suit specific ground clearance requirements. | 10th Mar 1934 | Box 139 \ 2 scan0055 | |
| Letter to S. Smith & Sons regarding a missing print for 'Jackall Jacks' and the testing of a Phantom II car. | 15th Mar 1934 | Box 139 \ 2 scan0056 | |
| Letter from Donald Sessions & Company Ltd. regarding a delay and modifications to two-speed jack handles. | 15th Mar 1934 | Box 139 \ 2 scan0057 | |
| Comparative efficiency and user effort of various jacking systems. | 16th Mar 1934 | Box 139 \ 2 scan0058 | |
| Article from 'The Autocar' magazine detailing permanently fitted jacking systems and new types available. | 9th Mar 1934 | Box 139 \ 2 scan0059 | |
| Page from 'The Autocar' magazine with articles on oil fraud, road safety, and Glasgow's trams. | 9th Mar 1934 | Box 139 \ 2 scan0060 | |
| Article from 'The Autocar' magazine detailing various types of recently developed car jacking systems. | 9th Mar 1934 | Box 139 \ 2 scan0061 | |
| Article from 'The Autocar' magazine reviewing various permanently fitted and detachable car jacking systems. | 9th Mar 1934 | Box 139 \ 2 scan0062 | |
| Article from 'The Autocar' reviewing various permanently fitted and detachable jacking systems for motor cars. | 9th Mar 1934 | Box 139 \ 2 scan0063 | |
| 'Autocar' magazine page featuring articles on the R.A.C. Rally, Japanese motor industry competition, and two-way radios in police cars. | 9th Mar 1934 | Box 139 \ 2 scan0064 | |
| Letter from S. Smith & Sons regarding Jackall Jacks and adjustments for a Phantom Car. | 16th Mar 1934 | Box 139 \ 2 scan0065 | |
| Impossibility of fitting Jackall Jacks to rear axles without rendering them useless. | 16th Mar 1934 | Box 139 \ 2 scan0066 | |
| Letter to S. Smith & Sons arranging the fitting of Jackall Jacks to a Phantom II Car. | 22th Mar 1934 | Box 139 \ 2 scan0067 | |
| Letter from S. Smith & Sons confirming a mechanic's visit to adjust Jackall Jacks. | 23th Mar 1934 | Box 139 \ 2 scan0068 | |
| Comparison document outlining the pros and cons of fitting the Jackall jacking system to the chassis. | 26th Mar 1934 | Box 139 \ 2 scan0069 | |
| Performance and characteristics of D.W.S. permanent jacks on 40/50 HP and 20/25 HP chassis. | 26th Mar 1934 | Box 139 \ 2 scan0070 | |
| Proposal with a sketch for a built-in jacking system for independent wheel suspension. | 4th Apr 1934 | Box 139 \ 2 scan0071 | |
| Jacking lever and pawl mechanism with accompanying sketches. | 4th Apr 1934 | Box 139 \ 2 scan0072 | |
| Short internal memo chasing up a response to a previous memo from D.W.Sessions. | 6th Apr 1934 | Box 139 \ 2 scan0073 | |
| Jacking system for independent wheels, focusing on designing a single handle to operate both jacks. | 9th Apr 1934 | Box 139 \ 2 scan0074 | |
| Use of a single type of jack handle for both front and rear independent wheel systems. | 10th Apr 1934 | Box 139 \ 2 scan0075 | |
| Request to return a damaged Rubber Flex & Unions to Messrs. S. Smith & Sons for replacement. | 11th Apr 1934 | Box 139 \ 2 scan0076 | |
| Letter to S. Smith & Sons regarding a front flex that burst during initial testing and a request for a replacement. | 11th Apr 1934 | Box 139 \ 2 scan0077 | |
| Issues with D.W.S. and Jackall jacks, including friction, ease of use, and bursting pipes. | 18th Apr 1934 | Box 139 \ 2 scan0078 | |
| Testing of Jackall Jacks and their comparison to D.W.S. jacks. | 19th Apr 1934 | Box 139 \ 2 scan0079 | |
| Letter from S. Smith & Sons concerning modifications to rear jacks and brackets. | 23th Apr 1934 | Box 139 \ 2 scan0080 | |
| Letter to Messrs. S. Smith & Sons Ltd. confirming the despatch of two rear Jacks and Brackets. | 24th Apr 1934 | Box 139 \ 2 scan0081 | |
| Request to return 2 rear Jacks & Brackets to Messrs. S. Smith & Sons for alterations. | 24th Apr 1934 | Box 139 \ 2 scan0082 | |
| Letter to S. Smith & Sons regarding an omitted Jack Support Cap from a shipment. | 25th Apr 1934 | Box 139 \ 2 scan0083 | |
| Request to return one Jackall clip to Mr. Bailey of Messrs. S. Smith & Sons. | 2nd May 1934 | Box 139 \ 2 scan0084 | |
| Letter to S. Smith & Sons arranging for a man to re-fit rear jacks in Derby. | 15th May 1934 | Box 139 \ 2 scan0085 | |
| Letter from S. Smith & Sons regarding the fitting of a 'Jackall' jacking system to a Bentley. | 16th May 1934 | Box 139 \ 2 scan0086 | |
| Letter from S. Smith & Sons regarding the S.U. Carburetter and chassis delivery. | 16th May 1934 | Box 139 \ 2 scan0087 | |
| Weight analysis of Jackall components for the Phantom II and Rolls-Bentley models. | 26th May 1934 | Box 139 \ 2 scan0088 | |
| Letter to a supplier regarding the return of incorrect chassis jacks for a 20/25 HP car. | 26th May 1934 | Box 139 \ 2 scan0089 | |
| Letter from S. Smith & Sons reminding W. A. Robotham of a promise to provide a Bentley chassis for the purpose of installing 'Jackalls'. | 28th May 1934 | Box 139 \ 2 scan0090 | |
| Returning a set of D.W.S. Jacks for replacement with a modified type. | 28th May 1934 | Box 139 \ 2 scan0091 | |
| Letter to Messrs. S. Smith & Sons regarding the allotment of a chassis for Jackall Jacks. | 29th May 1934 | Box 139 \ 2 scan0092 | |
| Letter from S. Smith & Sons confirming a set of 'Jackall' Jacks have been ear-marked for a chassis. | 7th Jun 1934 | Box 139 \ 2 scan0093 | |
| Letter to S. Smith & Sons regarding perished and burst flexible tubings on 'Jackall' Jacks fitted to a Phantom II car. | 12th Jun 1934 | Box 139 \ 2 scan0094 | |
| Letter from S. Smith & Sons regarding defective flexes on the Jackalls and arranging replacements. | 15th Jun 1934 | Box 139 \ 2 scan0095 | |
| Letter to Messrs. S. Smith & Sons regarding a delayed chassis. | 16th Jun 1934 | Box 139 \ 2 scan0096 | |
| Letter from S. Smith & Sons regarding testing issues with flexible tubings for Jackall Jacks and a proposal for replacement. | 16th Jun 1934 | Box 139 \ 2 scan0097 | |
| Follow-up letter regarding the trial of Smith's Jackall Jacks on the 20-EX vehicle. | 19th Jun 1934 | Box 139 \ 2 scan0098 | |
| Invoice from S.Smith & Sons for Jackall jacks fitted to a Phantom II, G.H.8034. | 19th Jun 1934 | Box 139 \ 2 scan0099 | |
| Invoice for 'Jackall' Jacks fitted to a 20-EX chassis and requesting a covering order. | 20th Jun 1934 | Box 139 \ 2 scan0100 | |
| Letter from S. Smith & Sons regarding an enquiry for engine operated Jackall equipment with double-acting rams. | 22th Jun 1934 | Box 139 \ 2 scan0101 | |
| Initial testing and issues with the 'Jackall Jacks' system on car 20-EX. | 25th Jun 1934 | Box 139 \ 2 scan0102 | |
| Request to draw up and make one pair of 'Jackall' rear jack brackets to be cast in aluminium. | 26th Jun 1934 | Box 139 \ 2 scan0103 | |
| Letter from S. Smith & Sons confirming a representative's visit to refit parts on a Phantom II. | 2nd Jul 1934 | Box 139 \ 2 scan0104 | |
| Correspondence with S. Smith & Sons regarding testing and modifications to 'Jackall' Jacks. | 5th Jul 1934 | Box 139 \ 2 scan0105 | |
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