| Description | Date | Identifier | |
| Letter to New Hudson Ltd. regarding specifications for leading shoe brakes and the thickness of the web. | 22th Feb 1939 | Box 121 \ 1 scan0125 | |
| Letter of apology for being unable to attend a dance due to a month-long absence from work. | 22th Feb 1939 | Box 121 \ 1 scan0126 | |
| Letter from New Hudson Ltd regarding the acceptance of an order for shoes with rivet holes and enclosing a revised print. | 25th Feb 1939 | Box 121 \ 1 scan0127 | |
| Covering order for eight special brake shoes for Bentley V brakes from New Hudson Ltd. | 28th Feb 1939 | Box 121 \ 1 scan0128 | |
| Letter to Messrs. New Hudson Ltd. acknowledging receipt of a letter and a correct blueprint. | 1st Mar 1939 | Box 121 \ 1 scan0129 | |
| Letter to Automotive Products Ltd. ordering a master cylinder and requesting a parts catalogue. | 20th Mar 1939 | Box 121 \ 1 scan0130 | |
| Request to issue an official order for a master cylinder from Automotive Products Ltd. | 20th Mar 1939 | Box 121 \ 1 scan0131 | |
| Letter from New-Hudson Ltd. concerning a modification to Girling adjuster units. | 20th Mar 1939 | Box 121 \ 1 scan0132 | |
| Letter from Automotive Products Company Ltd regarding a 1¼ inch Barrel type Master Cylinder. | 22th Mar 1939 | Box 121 \ 1 scan0133 | |
| Letter to New Hudson Ltd. concerning alterations to an adjuster for an aluminium brake shoe. | 28th Mar 1939 | Box 121 \ 1 scan0134 | |
| Letter from New-Hudson Ltd confirming an agreement to accept standard machining on plungers and enclosing a revised print. | 29th Mar 1939 | Box 121 \ 1 scan0135 | |
| Letter to New Hudson Ltd. regarding altered expander unit plungers and a request for special taps and drawings. | 6th Apr 1939 | Box 121 \ 1 scan0136 | |
| Letter from New-Hudson Ltd discussing a modification to adjuster plungers. | 7th Apr 1939 | Box 121 \ 1 scan0137 | |
| Letter from New Hudson Limited regarding tapping sizes and the supply of a standard tap. | 7th Apr 1939 | Box 121 \ 1 scan0138 | |
| Letter from the Experimental Dept. to New Hudson Ltd. requesting a pair of new adjuster units. | 13th Apr 1939 | Box 121 \ 1 scan0139 | |
| Request for a scheme showing hydraulic brake pipes and fittings for the B.V. B.50 and Silver Wraith chassis. | 13th Apr 1939 | Box 121 \ 1 scan0140 | |
| Letter from New-Hudson Ltd. concerning a communication issue and the status of order number 87420. | 14th Apr 1939 | Box 121 \ 1 scan0141 | |
| Order confirmation letter for Lockheed hydraulic fittings sent to Automotive Products Ltd. | 27th Apr 1939 | Box 121 \ 1 scan0142 | |
| Official order for a duplicate set of parts to be issued to Automotive Products Ltd. | 27th Apr 1939 | Box 121 \ 1 scan0143 | |
| Letter from Automotive Products Company Ltd regarding an order for a duplicate set of Hydraulic Fittings. | 28th Apr 1939 | Box 121 \ 1 scan0144 | |
| Letter from Automotive Products Company Ltd. regarding an untraceable customer letter related to an order. | 3rd May 1939 | Box 121 \ 1 scan0145 | |
| Letter to Automotive Products Ltd. requesting a Hill holder for experimental purposes. | 4th May 1939 | Box 121 \ 1 scan0146 | |
| Request to issue an official order to Automotive Products Ltd. for a Hill holder for experimental work. | 4th May 1939 | Box 121 \ 1 scan0147 | |
| Letter from New-Hudson Ltd. regarding the supply and fitting of Girling Brakes. | 4th May 1939 | Box 121 \ 1 scan0148 | |
| Letter from Automotive Products Company regarding the specification and delivery delay of a Hill Holder. | 8th May 1939 | Box 121 \ 1 scan0149 | |
| Request to order three sets of Lockheed Hydraulic fittings from Automotive Products Ltd. | 12th May 1939 | Box 121 \ 1 scan0150 | |
| List of parts with quantities, part numbers, and descriptions for one set. | 12th May 1939 | Box 121 \ 1 scan0151 | |
| Letter to Automotive Products Ltd. regarding the ordering of Hill Holders and hoses for an experimental chassis. | 12th May 1939 | Box 121 \ 1 scan0152 | |
| List of parts by part number and description, with quantities for one set. | 12th May 1939 | Box 121 \ 1 scan0153 | |
| Letter from Automotive Products Company Ltd. regarding the despatch of a Lockheed Hill Holder, hoses, and fittings. | 15th May 1939 | Box 121 \ 1 scan0154 | |
| Urgent internal memo to order 1 gallon of Lockheed brake fluid Orange. | 17th May 1939 | Box 121 \ 1 scan0155 | |
| Letter to a supplier about an issue with white grease melting and a request to switch to Mobiloil grease No.5. | 17th May 1939 | Box 121 \ 1 scan0156 | |
| Correspondence regarding changing the grease for Girling Brake Expanders to Mobiloil Grease No. 5. | 19th May 1939 | Box 121 \ 1 scan0157 | |
| Instructing a change of grease for Girling brakes operating wedges and adjustors. | 12th Jun 1939 | Box 121 \ 1 scan0158 | |
| Instructing the conversion of 12.B.V. models from mechanical to hydraulic front brakes. | 26th Jun 1939 | Box 121 \ 1 scan0159 | |
| Confirming the completion of the scheme for a hand brake lever with a Bowden operated release pawl. | 30th Jun 1939 | Box 121 \ 1 scan0160 | |
| Letter from New-Hudson Ltd. enclosing a print of a Girling two-leading shoe brake assembly. | 4th Jul 1939 | Box 121 \ 1 scan0161 | |
| Letter from New-Hudson Ltd regarding a delay on special springs and arranging for a replacement set to be sent. | 5th Jul 1939 | Box 121 \ 1 scan0162 | |
| Directive to standardize brake linings and servo cams on all future experimental chassis. | 11th Jul 1939 | Box 121 \ 1 scan0163 | |
| Instruction to modify the hydraulic front brakes on experimental chassis. | 11th Jul 1939 | Box 121 \ 1 scan0164 | |
| Requesting an official order be issued to Automotive Products Ltd. for various parts. | 14th Jul 1939 | Box 121 \ 1 scan0165 | |
| Insufficient return spring for the hydraulic brake master cylinder, requesting a stronger spring and an interim fix. | 24th Jul 1939 | Box 121 \ 1 scan0166 | |
| Letter to New Hudson Ltd. chasing the delivery of special springs for two leading shoe Girling brakes. | 24th Aug 1939 | Box 121 \ 1 scan0167 | |
| Letter from a supplier regarding new ordering procedures and supply chain challenges due to the outbreak of war. | 13th Sep 1939 | Box 121 \ 1 scan0168 | |
| Letter from Automotive Products Company Ltd. advising of probable price increases for materials. | 15th Sep 1939 | Box 121 \ 1 scan0169 | |
| Letter to Automotive Products Co. Ltd. acknowledging their remarks regarding an increase of prices. | 19th Sep 1939 | Box 121 \ 1 scan0170 | |
| Payment for an invoice from New-Hudson Ltd. for hand-made Girling brake shoe springs. | 27th Sep 1939 | Box 121 \ 1 scan0171 | |
| Letter to A.F. Martindale discussing the brake specifications for a small car, including set-up, drum size, and linkage. | 28th Sep 1939 | Box 121 \ 1 scan0172 | |
| Recommending linings for leading and trailing brake shoes on an 11.B.V. model. | 5th Oct 1939 | Box 121 \ 1 scan0173 | |
| Covering order for Girling Brake Shoe springs. | 6th Oct 1939 | Box 121 \ 1 scan0174 | |
| Letter to A.F. Martindale regarding brake arrangements for a small car and the start of the War. | 13th Oct 1939 | Box 121 \ 1 scan0175 | |
| Letter from a supplier about potential delays and price increases for Lockheed Brake Fluid due to National Emergency demands. | 23th Oct 1939 | Box 121 \ 1 scan0176 | |
| Requesting the material specification for a washer in a Bendix brake adjusting mechanism. | 24th Nov 1939 | Box 121 \ 1 scan0177 | |
| Request from the laboratory for more washers for a satisfactory material analysis for Bendix Brakes. | 27th Nov 1939 | Box 121 \ 1 scan0178 | |
| Material of a washer in the Bendix brake adjusting mechanism to prevent squeaks. | 24th Nov 1939 | Box 121 \ 1 scan0179 | |
| Letter describing an instructor's job at No. 12 E.F.T.S. RAF Prestwick. | 8th Dec 1939 | Box 121 \ 1 scan0180 | |
| Letter discussing suggestions for brakes and cost analysis. | 8th Dec 1939 | Box 121 \ 1 scan0181 | |
| Twin valve shock damper scheme and related issues with dirt. | 8th Dec 1939 | Box 121 \ 1 scan0182 | |
| Design challenges related to a compound valve, including dirt settlement and component costs. | 8th Dec 1939 | Box 121 \ 1 scan0183 | |
| What is imagined to be a convenient size. | 11th Dec 1939 | Box 121 \ 1 scan0184 | |
| Letter to A.F. Martindale regarding his new job, brake specifications, and the relocation of the Experimental Department. | 11th Dec 1939 | Box 121 \ 1 scan0185 | |
| Laboratory report on the material analysis of a washer from a Bendix brake shoe adjusting mechanism. | 21th Dec 1939 | Box 121 \ 1 scan0186 | |
| Letter from New-Hudson Ltd. announcing a new Service Engineer for client liaison. | 5th Jan 1940 | Box 121 \ 1 scan0187 | |
| Letter to New Hudson Ltd. acknowledging new Service Engineers and advising of a staff change due to an R.A.F. recall. | 9th Jan 1940 | Box 121 \ 1 scan0188 | |
| Letter discussing problems with interleaving and brake linings, comparing different material types. | 14th Jan 1940 | Box 121 \ 1 scan0189 | |
| Memo discussing the trial and sourcing of new materials like V.G.90 for springs from Ferodo. | 14th Jan 1940 | Box 121 \ 1 scan0190 | |
| Costs and testing procedures for new spring materials, specifically mentioning Ferodo and Enaldite. | 14th Jan 1940 | Box 121 \ 1 scan0191 | |
| Letter from A.F. Martindale enquiring about a sketch for a cheap shock damper. | 17th Jan 1940 | Box 121 \ 1 scan0192 | |
| Letter to New Hudson Ltd. requesting figures for the Servo Coefficient of Girling Brakes on an experimental car. | 17th Jan 1940 | Box 121 \ 1 scan0193 | |
| Letter to P/O A.F. Martindale regarding his remarks on brake lining and inter-leaving. | 17th Jan 1940 | Box 121 \ 1 scan0194 | |
| Letter from New-Hudson Ltd. arranging a meeting with Mr. Robotham and confirming information is being prepared. | 19th Jan 1940 | Box 121 \ 1 scan0195 | |
| Brake and lining wear for three car models with hydraulic front and Girling rear systems. | 23th Jan 1940 | Box 121 \ 1 scan0196 | |
| Brake system performance, adjustments, and issues for a vehicle with hydraulic front and Girling rear brakes. | 23th Jan 1940 | Box 121 \ 1 scan0197 | |
| Brake wear inspection and findings, including measurements and car weight. | 23th Jan 1940 | Box 121 \ 1 scan0198 | |
| Brake wear test results for car 33.G.VII, noting a disproportionate wear ratio between the front and rear. | 23th Jan 1940 | Box 121 \ 1 scan0199 | |
| Letter to A.F. Martindale regarding excessive rear brake wear on 8-cylinder cars and a query about using a more durable brake lining. | 24th Jan 1940 | Box 121 \ 1 scan0200 | |
| Official order for two different sizes of Bundy Tubing. | 26th Jan 1940 | Box 121 \ 1 scan0201 | |
| Letter from a supplier advising of material shortages and extended delivery lead times of at least four months. | 31th Jan 1940 | Box 121 \ 1 scan0202 | |
| Letter from Prestwick Aerodrome discussing front wheel skid and braking. | 4th Feb 1940 | Box 121 \ 1 scan0203 | |
| With calculations for vehicle dynamics, specifically braking ratios and front skid safety factors. | 4th Feb 1940 | Box 121 \ 1 scan0204 | |
| Analysing front braking proportions, weight transference, and associated physics calculations including a free-body diagram. | 4th Feb 1940 | Box 121 \ 1 scan0205 | |
| Letter on Officers' Mess letterhead discussing issues with brake system ratios and the development of components. | 4th Feb 1940 | Box 121 \ 1 scan0206 | |
| Letter suggesting altering proportions to address a technical issue described as 'incoherent'. | 4th Feb 1940 | Box 121 \ 1 scan0207 | |
| Master cylinder dimensions and recommendations against using Lepaz brake linings due to accelerated wear. | 16th Feb 1940 | Box 121 \ 1 scan0208 | |
| Conference minutes detailing decisions on brake system modifications due to sticking in snow and slush. | 16th Feb 1940 | Box 121 \ 1 scan0209 | |
| Modifications and testing procedures for Girling wedge units and servo systems. | 16th Feb 1940 | Box 121 \ 1 scan0210 | |
| Brake system issues including servo water ingress, front brake damper stiction, and brake lining wear. | 16th Feb 1940 | Box 121 \ 1 scan0211 | |
| Plan outlining the testing procedure for hydraulic front brakes, including component recommendations and chassis allocation. | 16th Feb 1940 | Box 121 \ 1 scan0212 | |
| Letter to Automotive Products, Co. Ltd. about fitting hydraulic brakes to a 30 HP Bentley for experimental purposes. | 16th Feb 1940 | Box 121 \ 1 scan0213 | |
| Letter page requesting a recommendation for suitable sizes of cylinders and pedal ratio. | 16th Feb 1940 | Box 121 \ 1 scan0214 | |
| Causes of brakes sticking on due to recent snow and slush conditions. | 16th Feb 1940 | Box 121 \ 1 scan0215 | |
| Faults found in a vehicle's servo and brake system. | 16th Feb 1940 | Box 121 \ 1 scan0216 | |
| Comparison of dimensions for equaliser wedge unit rods between Girling and R.R. manufacture. | 16th Feb 1940 | Box 121 \ 1 scan0217 | |
| Design of foot brake linkages for the left-hand senior range of cars. | 23th Feb 1940 | Box 121 \ 1 scan0218 | |
| Short memo reminding someone about the hand brake with modified ground clearance. | 2nd Mar 1940 | Box 121 \ 1 scan0219 | |
| Inquiring about a scheme to prevent carrier plates from rattling. | 2nd Mar 1940 | Box 121 \ 1 scan0220 | |
| Request to The Press Caps Co Ltd. for a quantity of smaller press caps for Girling Hydraulic Brakes. | 12th Mar 1940 | Box 121 \ 1 scan0221 | |
| Requesting production costs for modifications to Girling wedge units, including chromium plating and housing enlargement. | 12th Mar 1940 | Box 121 \ 1 scan0222 | |
| Letter to The Wilcot (Parent) Co. Ltd. requesting a dozen dust excluders for experimental purposes and a quotation for 500. | 12th Mar 1940 | Box 121 \ 1 scan0223 | |
| Hand-drawn sketch of a cylindrical component with fitting dimensions and a reference to another drawing. | 12th Mar 1940 | Box 121 \ 1 scan0224 | |
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