| Description | Date | Identifier | |
| Letter to Smith's Jacking Systems regarding an order for portable jacks. | 2nd Jan 1939 | Box 140 \ 2 scan0138 | |
| Letter from Smith's Jacking Systems regarding the design of Hydrolift jack handles for a Bentley. | 10th Jan 1939 | Box 140 \ 2 scan0139 | |
| Requesting payment for a special sample hydrolift jack from Smith's Jacking Systems Ltd. | 13th Jan 1939 | Box 140 \ 2 scan0140 | |
| Letter from Smith's Jacking Systems Ltd. proposing a meeting to discuss jacking requirements for the 25/30 HP and Phantom III chassis. | 6th Feb 1939 | Box 140 \ 2 scan0141 | |
| The standardization of new DWS jacks for the Wraith 'C' series and the requirements for a mock-up. | 10th Feb 1939 | Box 140 \ 2 scan0142 | |
| Letter from Smith's Jacking Systems Ltd. confirming the outside diameter of a new type jack and its despatch. | 10th Feb 1939 | Box 140 \ 2 scan0143 | |
| Letter from Smith's Jacking Systems Ltd. regarding the future supply of hydraulic jacks for Rolls-Royce and Bentley cars. | 14th Feb 1939 | Box 140 \ 2 scan0144 | |
| Letter regarding supply issues for D.W.S. Permanent Hydraulic Jacks from supplier R.T. Shelley Ltd. | 13th Feb 1939 | Box 140 \ 2 scan0145 | |
| Comparing different design and supply schemes for Jackall rams and distributor boxes. | 13th Feb 1939 | Box 140 \ 2 scan0146 | |
| Alterations and test results for a new design of jack ram. | 13th Feb 1939 | Box 140 \ 2 scan0147 | |
| Letter from Smith's Jacking Systems Limited regarding production timelines and supply of jacking equipment. | 13th Feb 1939 | Box 140 \ 2 scan0148 | |
| To hold all machining on Wraith C. Series front and rear jack bracket castings. | 14th Feb 1939 | Box 140 \ 2 scan0149 | |
| Letter from Smith's Jacking Systems Ltd. regarding the status of a Jackall Distributor Box left for examination. | 17th Feb 1939 | Box 140 \ 2 scan0150 | |
| Cancelling instructions to hold up machining of Wraith 'C' Series jack brackets as no alteration is necessary. | 17th Feb 1939 | Box 140 \ 2 scan0151 | |
| Return of loaned jacking equipment to Smiths Jacking Systems for examination. | 18th Feb 1939 | Box 140 \ 2 scan0152 | |
| Letter from Smith's Jacking Systems Ltd. requesting chassis drawings for the 25/30 HP and Phantom III cars. | 9th Mar 1939 | Box 140 \ 2 scan0153 | |
| Letter to Smith's Jacking Systems Ltd. regarding the layout for a new type of jack on the Wraith chassis. | 11th Mar 1939 | Box 140 \ 2 scan0154 | |
| Letter from Smith's Jacking Systems requesting further blueprints for the Wraith and Phantom III chassis for record purposes. | 13th Mar 1939 | Box 140 \ 2 scan0155 | |
| Letter to Messrs. Smith's Jacking Systems Ltd. confirming the despatch of chassis prints for the Phantom III and Wraith models. | 15th Mar 1939 | Box 140 \ 2 scan0156 | |
| Letter from Smith's Jacking Systems Ltd. acknowledging receipt of chassis prints for the Phantom III and Wraith. | 16th Mar 1939 | Box 140 \ 2 scan0157 | |
| Comparing the expensive, inefficient built-in jacks on Phantom III and Wraith models with a proposed cheaper, portable hydraulic jack. | 10th Mar 1939 | Box 140 \ 2 scan0158 | |
| Trial of an alternative scheme for fitting jacks onto various car bodies. | 16th Mar 1939 | Box 140 \ 2 scan0159 | |
| Specifying the correct jack fluid for the Wraith 'C' Series vehicles and updating user instructions. | 23th Mar 1939 | Box 140 \ 2 scan0160 | |
| Fitting of B.V. jack scheme brackets to a Wraith 29.G.VI. | 23th Mar 1939 | Box 140 \ 2 scan0161 | |
| Short typed message, likely a telegram, regarding the scheduling of a demonstration. | 25th Mar 1939 | Box 140 \ 2 scan0162 | |
| Telegram from Cowen to Roycar Derby arranging a demonstration for Grylls. | 5th Mar 1939 | Box 140 \ 2 scan0163 | |
| Apologising for a delay in communication regarding the 'Jack' car. | 25th Mar 1939 | Box 140 \ 2 scan0164 | |
| Short memo confirming the availability of a demonstration regarding 'Jacks'. | 25th Mar 1939 | Box 140 \ 2 scan0165 | |
| Invoice from Smith's Jacking Systems Ltd for hand pumps and jacks. | 28th Mar 1939 | Box 140 \ 2 scan0166 | |
| Letter to Messrs. Smith's Jacking Systems Ltd. regarding trouble with a portable jack. | 28th Mar 1939 | Box 140 \ 2 scan0167 | |
| Order for six portable hydraulic jacks with specific features. | 29th Mar 1939 | Box 140 \ 2 scan0168 | |
| Order be sent to Smith's Jacking Systems Ltd for various parts that have already been received. | 29th Mar 1939 | Box 140 \ 2 scan0169 | |
| Letter from Smith's Jacking Systems Ltd. regarding a faulty Bentley Hydrolift jack and filling instructions. | 29th Mar 1939 | Box 140 \ 2 scan0170 | |
| Page 2 of a letter from Smith's Jacking Systems Ltd. discussing the re-filling and potential faults of their jacks. | 29th Mar 1939 | Box 140 \ 2 scan0171 | |
| Letter from Smith's Jacking Systems Ltd. enclosing copies of correspondence in connection with Fluid. | 30th Mar 1939 | Box 140 \ 2 scan0172 | |
| Letter from Smith's Jacking Systems regarding an investigation into slow-returning jack rams and the suitability of 'Castrolic' fluid. | 30th Jan 1939 | Box 140 \ 2 scan0173 | |
| Letter to Smith's Jacking Systems Ltd. regarding slow ram return in hydraulic jacks due to gland swelling caused by incorrect oil. | 27th Jan 1939 | Box 140 \ 2 scan0174 | |
| From G. Hancock to Mr. Bailey regarding a complaint about the slow return of hydraulic jacks after service. | 26th Jan 1939 | Box 140 \ 2 scan0175 | |
| Analysis and conclusions on 'Jackall Fluid' and Wakefield's Castraulic Fluid. | 6th Mar 1939 | Box 140 \ 2 scan0176 | |
| Concluding recommendation on the regular renewal of castor oil-based hydraulic fluids. | 31th Mar 1939 | Box 140 \ 2 scan0177 | |
| Letter to a supplier regarding faults found in a jacking system and suggestions for improvement. | 31th Mar 1939 | Box 140 \ 2 scan0178 | |
| Page 2 of a letter to Smith's Jacking Systems Ltd. requesting a drawing of a pump chamber. | 31th Mar 1939 | Box 140 \ 2 scan0179 | |
| Demonstration of a hand-operated hydraulic jack and checking stock levels for the Phantom III. | 31th Mar 1939 | Box 140 \ 2 scan0180 | |
| Proposal to substitute hydraulic jacks with hand-operated jacks on Wraith and Bentley models. | 27th Mar 1939 | Box 140 \ 2 scan0181 | |
| Letter from Smith's Jacking Systems Ltd. concerning a failed Hydrolift jack and proposed design modifications. | 3rd Apr 1939 | Box 140 \ 2 scan0182 | |
| Requesting the urgent manufacture of six aluminium bronze brackets for portable jacks. | 4th Apr 1939 | Box 140 \ 2 scan0183 | |
| Correspondence with Smith's Jacking Systems Ltd. regarding a portable jack pump failure and a proposed modification for a hardened steel insert. | 6th Apr 1939 | Box 140 \ 2 scan0184 | |
| Letter from Smith's Jacking Systems Ltd. regarding a fault with a Hydrolift jack and proposed modifications. | 12th Apr 1939 | Box 140 \ 2 scan0185 | |
| Letter to Messrs. Smith's Jacking Systems Ltd. regarding a suggested insert for a pump body and a proposed meeting. | 17th Apr 1939 | Box 140 \ 2 scan0186 | |
| Letter from Smith's Jacking Systems Ltd. regarding the dispatch of parts for a Raith service. | 18th Apr 1939 | Box 140 \ 2 scan0187 | |
| Letter from Smith's Jacking Systems Ltd. enclosing a previously omitted blueprint, No. 2392X4. | 19th Apr 1939 | Box 140 \ 2 scan0188 | |
| General arrangement drawing for a flexible tube with a table of part numbers and corresponding lengths. | 18th Apr 1939 | Box 140 \ 2 scan0189 | |
| Letter from Smith's Jacking Systems Ltd. regarding a suggested modification to a Hydrolift pump body. | 20th Apr 1939 | Box 140 \ 2 scan0190 | |
| Letter to Smith's Jacking Systems Ltd. arranging a visit to discuss the Hydrolift Jack. | 21th Apr 1939 | Box 140 \ 2 scan0191 | |
| Letter from Smith's Jacking Systems Ltd. to S.H. Grylls arranging a meeting and lunch. | 26th Apr 1939 | Box 140 \ 2 scan0192 | |
| Letter from Smith's Jacking Systems Ltd. regarding modifications and testing of Hydrolift jacks for Bentley cars. | 1st May 1939 | Box 140 \ 2 scan0193 | |
| Page 2 of a letter from Smith's Jacking Systems Ltd. regarding permanently fitted jacks. | 1st May 1939 | Box 140 \ 2 scan0194 | |
| Letter to a supplier regarding the specifications and testing of jacking systems. | 2nd May 1939 | Box 140 \ 2 scan0195 | |
| Requesting an official order be placed for a jack bracket die. | 2nd May 1939 | Box 140 \ 2 scan0196 | |
| Letter from Smith's Jacking Systems Ltd. regarding a blueprint and modification to a bracket for the Bentley Hydro-lift. | 4th May 1939 | Box 140 \ 2 scan0197 | |
| Correspondence with Smith's Jacking Systems Ltd. regarding a modified jack bracket drawing. | 5th May 1939 | Box 140 \ 2 scan0198 | |
| The forwarding of six brackets to Messrs Smiths Jacking System Ltd. | 11th May 1939 | Box 140 \ 2 scan0199 | |
| Letter to Smith's Jacking Systems Ltd. concerning jack brackets and a suggestion for a filler position on the reservoir. | 12th May 1939 | Box 140 \ 2 scan0200 | |
| Letter from Smith's Jacking Systems Ltd. regarding the design of Hydrolift jacks, specifically the issue of air expansion. | 13th May 1939 | Box 140 \ 2 scan0201 | |
| Letter from Smith's Jacking Systems Ltd. requesting instructions for fitting brackets to hydraulic jacks. | 13th May 1939 | Box 140 \ 2 scan0202 | |
| Letter to Smith's Jacking Systems Ltd. regarding the position of jack brackets. | 16th May 1939 | Box 140 \ 2 scan0203 | |
| Letter from Smith's Jacking Systems Ltd concerning the mounting of brackets onto jacks for Order 89358. | 18th May 1939 | Box 140 \ 2 scan0204 | |
| Confirming the doubling of brackets required for the Bentley V portable jack. | 27th May 1939 | Box 140 \ 2 scan0205 | |
| Letter chasing an overdue order for six experimental portable jacks from Smith's Jacking Systems Ltd. | 9th Jun 1939 | Box 140 \ 2 scan0206 | |
| Letter from Smith's Jacking Systems Ltd. regarding a delay in supplying experimental Hydrolift Jacks for a Bentley model. | 10th Jun 1939 | Box 140 \ 2 scan0207 | |
| Authorization to pay an invoice from Smith's Jacking Systems Ltd. for various parts. | 12th Jun 1939 | Box 140 \ 2 scan0208 | |
| Covering order for parts from Smith's Jacking Systems Ltd. | 15th Jun 1939 | Box 140 \ 2 scan0209 | |
| Letter from Smith's Jacking Systems Ltd regarding design and production issues with Bentley Hydrolift jacks. | 16th Jun 1939 | Box 140 \ 2 scan0210 | |
| Letter from Smith's Jacking Systems Limited regarding a delay in providing final samples of a new design. | 16th Jun 1939 | Box 140 \ 2 scan0211 | |
| Required chassis modifications for experimental Silver Wraith and Silver Dawn models. | 22th Jun 1939 | Box 140 \ 2 scan0212 | |
| And drawing detailing the bracket position for a 15-inch lift jack on a 12.B.V. model. | 24th Jun 1939 | Box 140 \ 2 scan0213 | |
| The alterations required to fit DWS portable hydraulic jacks to Silver Wraith and Silver Dawn chassis. | 27th Jun 1939 | Box 140 \ 2 scan0214 | |
| Letter from Smith's Jacking Systems Ltd confirming the despatch of a Bentley Hydrolift jack bracket and an updated order requirement for all jacks to have a 15' extension. | 28th Jun 1939 | Box 140 \ 2 scan0215 | |
| Blueprint of a D.W.S. portable hydraulic jack, small type. | 2nd Apr 1939 | Box 140 \ 2 scan0216 | |
| Requesting an experiment on a jointing material called L'hermetic for use on paper joints. | 19th Mar 1918 | Box 140 \ 3 scan0001 | |
| Sales letter from A. A. Brazier & Co. regarding 'Bravilite Jointing' material for engines. | 1st Dec 1921 | Box 140 \ 3 scan0002 | |
| Follow-up memo regarding a sample of 'L'Hermetical' Jointing Solution, requesting a report for the suppliers. | 1st May 1922 | Box 140 \ 3 scan0003 | |
| Follow-up letter from The Patent Motor Products Co. regarding a sample of L'HERMETICAL JOINTING SOLUTION. | 26th Apr 1922 | Box 140 \ 3 scan0004 | |
| Cover note for a letter and sample of 'L'Hermetical' Jointing Solution, requesting a report. | 23th Mar 1922 | Box 140 \ 3 scan0005 | |
| Letter from The Patent Motor Products Co. regarding a sample of their L'HERMETICAL JOINTING SOLUTION. | 17th Mar 1922 | Box 140 \ 3 scan0006 | |
| Substitution of 'Dermatine' with 'Dexine' for jointing materials on the Goshawk 11 engine. | 16th Aug 1922 | Box 140 \ 3 scan0007 | |
| Letter from Ross-Roberts James & Co. Ltd. about 'Holdfast Liquid Jointing'. | 17th Apr 1924 | Box 140 \ 3 scan0008 | |
| Letter promoting 'Holdfast Liquid Jointing' as an alternative to traditional engine gaskets. | 16th Apr 1924 | Box 140 \ 3 scan0009 | |
| Advertisement leaflet for Bailey's 'Holdfast' thermoplastic metallic liquid jointing compound. | 16th Apr 1924 | Box 140 \ 3 scan0010 | |
| Price list for 'OSIRIS' high-class lubricating oils and greases for various machinery. | 2nd Feb 1925 | Box 140 \ 3 scan0011 | |
| Suggestion to trial agglomerated cork for water pipe jointings instead of rubber. | 2nd Feb 1925 | Box 140 \ 3 scan0012 | |
| Covering memo for an attached letter regarding the Weiss Joint. | 24th Nov 1925 | Box 140 \ 3 scan0013 | |
| Letter from Maurice Olley to Mr. A.J. Stent regarding a Weiss universal joint assembly. | 11th Nov 1925 | Box 140 \ 3 scan0014 | |
| Fabric Flexible Couplings from J & A Hillman Ltd, with an enclosed Sheffield Test House Report. | 23th Mar 1927 | Box 140 \ 3 scan0015 | |
| Promotional document for Hillman Fabric Flexible Couplings detailing their construction and test results. | 16th Jan 1925 | Box 140 \ 3 scan0016 | |
| Test report on a rubber impregnated canvas disc, detailing torque versus relative movement. | 16th Jan 1925 | Box 140 \ 3 scan0017 | |
| The use and performance of 'Graphol' on exhaust joints and butterfly valves. | 28th May 1926 | Box 140 \ 3 scan0018 | |
| Substitution and correct application of red fibre material. | 28th Apr 1927 | Box 140 \ 3 scan0019 | |
| Failure of Flexi-Lubri Covers on steering joints during a 10,000-mile test. | 27th May 1927 | Box 140 \ 3 scan0020 | |
| The failure of Flexi-Lubri covers on steering joints following a 10,000-mile road test. | 27th May 1927 | Box 140 \ 3 scan0021 | |
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