| Description | Date | Identifier | |
| Letter from Cantilever Constructions offering their toggle jack designs for cars. | 24th Oct 1932 | Box 26 \ 3 Scan159 | |
| Letter from Cantilever Constructions regarding special designs and a collapsible toggle-type jack. | 24th Oct 1932 | Box 26 \ 3 Scan160 | |
| Promotional leaflet for 'The Universal Jack', detailing its features, benefits, and user testimonials. | 24th Oct 1932 | Box 26 \ 3 Scan161 | |
| Promotional leaflet for 'The Universal Jack', an all-British car accessory. | 26th Oct 1932 | Box 26 \ 3 Scan162 | |
| Comparing the D.W.S. and Smith's hydraulic jacking systems. | 26th Oct 1932 | Box 26 \ 3 Scan163 | |
| Letter from Donald Sessions & Co. Ltd. regarding a delay in supplying D.W.S. Permanent Jacks due to difficulty procuring a special ball race. | 27th Oct 1932 | Box 26 \ 3 Scan164 | |
| Rejecting the 'Jack in the Box' car jack from Cantilever Constructions. | 31th Oct 1932 | Box 26 \ 3 Scan165 | |
| The unavailability of improved D.W.S. jacks for chassis No. 156-MS and the decision to fit a standard jack. | 31th Oct 1932 | Box 26 \ 3 Scan166 | |
| Reasons for rejecting the Jackall jacking system after testing, concluding that the D.W.S. system is superior. | 31th Oct 1932 | Box 26 \ 3 Scan167 | |
| Letter to Donald Sessions & Co, Ltd concerning the urgent need to supply modified jacks for chassis. | 3rd Nov 1932 | Box 26 \ 3 Scan168 | |
| Post office telegraph confirming readiness for a Jack Test. | 5th Nov 1932 | Box 26 \ 3 Scan169 | |
| Chasing the progress on sample jacks for approval and introduction to production. | 14th Nov 1932 | Box 26 \ 3 Scan170 | |
| Production status of modified D.W.S. jacks and their brackets. | 14th Nov 1932 | Box 26 \ 3 Scan171 | |
| Follow-up letter from Lake & Elliot Ltd. regarding a demonstration of their patented car jacking system. | 16th Nov 1932 | Box 26 \ 3 Scan172 | |
| Letter from Lake & Elliot, Limited listing features of a jacking system. | 16th Nov 1932 | Box 26 \ 3 Scan173 | |
| Drawing for modifications to brackets for securing D.W.S. jacks on the Phantom II chassis. | 17th Nov 1932 | Box 26 \ 3 Scan174 | |
| Arranging the fitting of D.W.S. Permanent Jacks to the Phantom II chassis, including modifications to the brackets. | 17th Nov 1932 | Box 26 \ 3 Scan175 | |
| Sending a D.W.S. Jack Handle to Lillie Hall for chassis No. 19-EX. | 18th Nov 1932 | Box 26 \ 3 Scan176 | |
| The fitting and dispatch of D.W.S. Jacks for car 19-EX. | 18th Nov 1932 | Box 26 \ 3 Scan177 | |
| Clarifying why an opinion was given on the jacks for car 19-EX. | 19th Nov 1932 | Box 26 \ 3 Scan178 | |
| Requesting recommendations for D.W.S. jacks, highlighting a ground clearance issue when fitted to the 20/25 HP front axle. | 21th Nov 1932 | Box 26 \ 3 Scan179 | |
| Letter from Donald Sessions & Company Ltd. regarding the postponement of a visit. | 22th Nov 1932 | Box 26 \ 3 Scan180 | |
| Inquiry from sales about fitting D.W.S. Jacks to the 20/25 model. | 22th Nov 1932 | Box 26 \ 3 Scan181 | |
| Letter to Donald Sessions & Co. Ltd. regarding a ground clearance issue caused by D.W.S. Jacks on the 20/25HP car. | 22th Nov 1932 | Box 26 \ 3 Scan182 | |
| Testing and standardisation of D.W.S. Jacks on Phantom II and 20/25HP models. | 22th Nov 1932 | Box 26 \ 3 Scan183 | |
| Letter to Donald Sessions & Co. Ltd. discussing modifications to jack brackets and handles, and arranging a meeting. | 26th Nov 1932 | Box 26 \ 3 Scan184 | |
| Letter from Donald Sessions & Company regarding a postponed visit to discuss brackets and the fitting of jacks to a 20/25 HP car. | 26th Nov 1932 | Box 26 \ 3 Scan185 | |
| Letter discussing the standardisation and redesign of jacks for Phantom II and 20/25 HP chassis. | 28th Nov 1932 | Box 26 \ 3 Scan186 | |
| Letter to Donald Sessions & Co. Ltd. regarding the fitting of jacks to cars and lift issues. | 29th Nov 1932 | Box 26 \ 3 Scan187 | |
| Decision to standardise D.W.S. permanent mechanical jacks for the Phantom II chassis. | 30th Nov 1932 | Box 26 \ 3 Scan188 | |
| Instruction to produce a set of aluminium brackets and delete the Dunlop screw type jack from the parts list. | 30th Nov 1932 | Box 26 \ 3 Scan189 | |
| Fitting of D.W.S. Jacks to the 20/25HP car. | 1st Dec 1932 | Box 26 \ 3 Scan190 | |
| Summary of conclusions regarding the supply and fitting of D.W.S. Jacks on Phantom II cars. | 1st Dec 1932 | Box 26 \ 3 Scan191 | |
| Using jacks from the Phantom II model to increase ground clearance on the 20/25HP car. | 1st Dec 1932 | Box 26 \ 3 Scan192 | |
| Letter to Donald Sessions & Co. Ltd. regarding blueprints for a 20/25HP car's rear axle spring mounting. | 3rd Dec 1932 | Box 26 \ 3 Scan193 | |
| Instructions for the production and supply of brackets, clips, and associated parts for the D.W.S. jacks on the Phantom II chassis. | 6th Dec 1932 | Box 26 \ 3 Scan194 | |
| Letter from Donald Sessions & Company Ltd. arranging a visit to discuss the jacks they supply. | 7th Feb 1933 | Box 26 \ 3 Scan195 | |
| Letter to Donald Sessions & Co, Ltd. confirming availability for a meeting. | 8th Feb 1933 | Box 26 \ 3 Scan196 | |
| Letter from Donald Sessions & Co. Ltd. regarding the stiffness of an early batch of 'D.W.S. Permanent Jacks' and arranging their return. | 11th Feb 1933 | Box 26 \ 3 Scan197 | |
| Letter addressing a complaint about the stiffness of a batch of jacks and the decision not to take action. | 13th Feb 1933 | Box 26 \ 3 Scan198 | |
| Letter from Donald Sessions & Co. Ltd. responding to a complaint about a stiff batch of D.W.S. Permanent Jacks. | 16th Feb 1933 | Box 26 \ 3 Scan199 | |
| Letter to Donald Sessions & Co. Ltd. requesting a set of suitable car jacks. | 17th Feb 1933 | Box 26 \ 3 Scan200 | |
| Letter from Donald Sessions & Company Ltd. acknowledging correspondence and promising a reply regarding D.W.S. Jacks. | 18th Feb 1933 | Box 26 \ 3 Scan201 | |
| Letter from Lake & Elliot Ltd. concerning the supply of jacking levers following an interview. | 20th Feb 1933 | Box 26 \ 3 Scan202 | |
| Product sheet for Millennium Jacking Levers for cars with closed rear panelling. | 1st Jan 1933 | Box 26 \ 3 Scan203 | |
| Letter from Donald Sessions & Company Ltd. concerning the provision of permanent jacks for testing purposes on two cars. | 21th Feb 1933 | Box 26 \ 3 Scan204 | |
| Report from a car tester regarding the excessive time and effort required to use the D.W.S. jacking system on the Phantom II chassis. | 6th Mar 1933 | Box 26 \ 3 Scan205 | |
| Operating time of the D.W.S. jacking system for the Phantom II chassis. | 7th Mar 1933 | Box 26 \ 3 Scan206 | |
| Letter to Donald Sessions & Co. Ltd. suggesting improvements to the D.W.S. jack. | 7th Mar 1933 | Box 26 \ 3 Scan207 | |
| Letter from Donald Sessions & Company Ltd. regarding modifications to D.W.S. Jacks for the 40/50 HP Chassis. | 8th Mar 1933 | Box 26 \ 3 Scan208 | |
| Letter to Donald Sessions & Co. Ltd. confirming a meeting to discuss a previous letter. | 20th Mar 1933 | Box 26 \ 3 Scan209 | |
| The failure, recall, and modification of D.W.S. Jacks. | 23th Mar 1933 | Box 26 \ 3 Scan210 | |
| Page discussing the use of larger figures to reduce the possibility of misfitting parts. | 23th Mar 1933 | Box 26 \ 3 Scan211 | |
| Letter from Donald Sessions & Company Ltd. proposing a visit to demonstrate their permanent jacks. | 18th Mar 1933 | Box 26 \ 3 Scan212 | |
| The stamping of D.W.S. Jacks with the letter 'P' to identify correct sets from faulty ones. | 24th Mar 1933 | Box 26 \ 3 Scan213 | |
| Standardisation document for D.W.S. permanent chassis jacks. | 16th Nov 1932 | Box 26 \ 3 Scan214 | |
| Form for tracking the implementation and costs of standardising chassis parts. | 24th Mar 1933 | Box 26 \ 3 Scan215 | |
| Letter from Donald Sessions & Company Ltd. concerning the fitting and proposed alterations of permanent jacks for 20/25 HP and 40/50 HP models. | 24th Mar 1933 | Box 26 \ 3 Scan216 | |
| Letter from a supplier concerning issues with jacks for the 40/50 chassis, including a product recall and experimental models. | 25th May 1933 | Box 26 \ 3 Scan217 | |
| Letter from Donald Sessions & Company Ltd. regarding a set of medium weight D.W.S. Jacks for testing. | 25th May 1933 | Box 26 \ 3 Scan218 | |
| Letter to Donald Sessions & Co. Ltd. providing feedback on the suitability of car jacks for 20/25 HP and 40/50 HP models. | 26th May 1933 | Box 26 \ 3 Scan219 | |
| Letter from a supplier regarding an issue with jacks supplied for testing on a 40/50 HP chassis. | 29th May 1933 | Box 26 \ 3 Scan220 | |
| Letter to Donald Sessions & Co. Ltd arranging a viewing for a set of special 40/50 Jacks and discussing a potential fault. | 30th May 1933 | Box 26 \ 3 Scan221 | |
| Complaints and defects related to D.W.S. Jacks on the 40/50 HP Chassis. | 1st Jun 1933 | Box 26 \ 3 Scan222 | |
| D.W.S. Jacks for a 40/50 HP chassis and a request to forward brackets. | 2nd Jun 1933 | Box 26 \ 3 Scan223 | |
| Letter from Donald Sessions & Company Ltd. proposing a visit to discuss a test set of D.W.S. Jacks. | 15th Jun 1933 | Box 26 \ 3 Scan224 | |
| Letter to Donald Sessions & Co. Ltd. arranging a convenient time for a visit. | 16th Jun 1933 | Box 26 \ 3 Scan225 | |
| Letter from a jack supplier concerning the fitting of jacks to 20/25 HP, Bentley, and 40/50 HP chassis. | 21th Jun 1933 | Box 26 \ 3 Scan226 | |
| Letter from Donald Sessions & Co Ltd regarding modifications and improvements to jacks. | 21th Jun 1933 | Box 26 \ 3 Scan227 | |
| Letter responding to a proposal about the suitability and weight of jacks for 20/25 HP and Bentley cars. | 23th Jun 1933 | Box 26 \ 3 Scan228 | |
| Page 2 of a letter to Donald Sessions & Co. concerning modifications to the 40/50 HP Chassis. | 10th Jul 1933 | Box 26 \ 3 Scan229 | |
| Requesting alterations to U bolts for special jacking levers on Bentley cars. | 10th Jul 1933 | Box 26 \ 3 Scan230 | |
| Fitting of D.W.S. jacks to 20/25 HP cars, their cost and potential standardisation. | 21th Jul 1933 | Box 26 \ 3 Scan231 | |
| D.W.S. jacks, wheel sizes, and clearance for wheel changing on cambered roads. | 28th Jul 1933 | Box 26 \ 3 Scan232 | |
| Issue with using D.W.S. jacks on a Phantom II car. | 28th Jul 1933 | Box 26 \ 3 Scan233 | |
| Sample set of lightened D.W.S. jacks for 20/25 HP cars. | 28th Jul 1933 | Box 26 \ 3 Scan234 | |
| Letter from Donald Sessions & Co. Ltd. regarding a delay in supplying a two-speed handle for the 40/50 chassis and a query about the 25 HP chassis. | 3rd Aug 1933 | Box 26 \ 3 Scan235 | |
| Letter to S. Smith & Sons Ltd. confirming the dispatch of Phantom II car blueprints following a visit concerning Jackall Hydraulic Jacks. | 4th Aug 1933 | Box 26 \ 3 Scan236 | |
| Letter from S. Smith & Sons confirming an engineer's visit to investigate possibilities of 'Jackall' equipment for a Bentley chassis. | 4th Aug 1933 | Box 26 \ 3 Scan237 | |
| Request to obtain prices for a lightened D.W.S. jack for 20/25 HP cars. | 4th Aug 1933 | Box 26 \ 3 Scan238 | |
| Letter inquiring about a design for a permanent combined turntable and four-wheel jack. | 4th Aug 1933 | Box 26 \ 3 Scan239 | |
| Note about two provisional patents, one for a four-wheel jack and another expiring in October. | 9th Aug 1933 | Box 26 \ 3 Scan240 | |
| Letter from S. Smith & Sons regarding drawings for the fitting of a Jackall hydraulic jack system. | 9th Aug 1933 | Box 26 \ 3 Scan241 | |
| Letter from the Experimental Department responding to a patented design for a combined turntable and four-wheel jacking system. | 10th Aug 1933 | Box 26 \ 3 Scan242 | |
| Letter to S. Smith & Sons Ltd. concerning blueprints for a hydraulic jack system and mislaid drawings. | 10th Aug 1933 | Box 26 \ 3 Scan243 | |
| Letter enclosing plans for a jacking apparatus that can be worked from the driver's seat. | 12th Aug 1933 | Box 26 \ 3 Scan244 | |
| Letter from C.R. Acton discussing a meeting arrangement in Derby and explaining his inability to attend due to convalescence. | 28th Aug 1933 | Box 26 \ 3 Scan245 | |
| Letter from the Experimental Department rejecting a proposal for a patent automatic jacking system. | 28th Aug 1933 | Box 26 \ 3 Scan246 | |
| Letter discussing weaknesses in a system and considering the substitution of hydraulic for electric motive power. | 29th Aug 1933 | Box 26 \ 3 Scan247 | |
| Letter from an inventor proposing a new jacking and balance system for vehicles. | 29th Aug 1933 | Box 26 \ 3 Scan248 | |
| Supply, pricing, and potential standardization of jacks for the 20/25 HP chassis. | 29th Aug 1933 | Box 26 \ 3 Scan249 | |
| Rejection letter to an inventor for a proposed four-wheel jacking system. | 30th Aug 1933 | Box 26 \ 3 Scan250 | |
| Pricing and testing of new lightened jacks from Donald Sessions for the 20/25 HP cars. | 7th Sep 1933 | Box 26 \ 3 Scan251 | |
| Relaying a customer's complaint about a DWS jack failing and suggesting a safety clip modification. | 1st Sep 1933 | Box 26 \ 3 Scan252 | |
| Testing of D.W.S. Jacks in response to an issue raised by Sir Norman Watson. | 15th Sep 1933 | Box 26 \ 3 Scan253 | |
| Letter to a supplier regarding a customer's complaint about a failing jack. | 15th Sep 1933 | Box 26 \ 3 Scan254 | |
| Letter from Donald Sessions & Co. Ltd. regarding a broken D.W.S. Jack on a Rolls-Royce car, suggesting causes and future safety measures. | 16th Sep 1933 | Box 26 \ 3 Scan255 | |
| Letter to Donald Sessions & Co, Ltd. concerning a damaged front jack and a proposal to add a special safety catch. | 18th Sep 1933 | Box 26 \ 3 Scan256 | |
| To Sir Norman Watson acknowledging a matter to be investigated concerning a car. | 18th Sep 1933 | Box 26 \ 3 Scan257 | |
| Investigation into a D.W.S. Jack failure and subsequent design modifications and improvements. | 20th Sep 1933 | Box 26 \ 3 Scan258 | |
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