| Description | Date | Identifier | |
| The non-use of a specific body for the 20/25 HP chassis. | 5th Jul 1935 | Box 102 \ 2 scan0168 | |
| Unsatisfactory design for fitting wind tone horns on the 20/25 HP car and proposing an alternative scheme. | 6th Sep 1935 | Box 102 \ 2 scan0169 | |
| Transfer of a second-hand Limousine body to an experimental 20/25HP chassis. | 9th Jan 1936 | Box 102 \ 2 scan0170 | |
| Cover note for an attached copy of a letter addressed to Messrs. Thrupp & Maberly. | 15th Jan 1936 | Box 102 \ 2 scan0171 | |
| Letter to coachbuilder Thrupp & Maberly regarding changes to interior upholstery and headlining. | 15th Jan 1936 | Box 102 \ 2 scan0172 | |
| Requesting an official order for hessian and paperbacked materials purchased by telephone from Carpet Trades, Kidderminster. | 20th Jan 1936 | Box 102 \ 2 scan0173 | |
| Cover note for a letter to Messrs. Thrupp & Maberly regarding a 20/25 HP Enclosed Limousine. | 22th Jan 1936 | Box 102 \ 2 scan0174 | |
| Letter to coachbuilders regarding the dispatch of a chassis and anti-noise material for a 20/25 Enclosed Limousine. | 22th Jan 1936 | Box 102 \ 2 scan0175 | |
| Short message to a representative regarding a call about noise insulation upon arrival. | 24th Jan 1936 | Box 102 \ 2 scan0176 | |
| Typed telegram giving instructions to not fit felt to a dashboard. | 27th Jan 1936 | Box 102 \ 2 scan0177 | |
| Requesting an official order for Hessian and paper backed materials from Carpet Trades, Kidderminster. | 27th Jan 1936 | Box 102 \ 2 scan0178 | |
| Letter to The Ruberoid Co. Ltd. arranging a meeting at Messrs. Thrupp & Maberly's to fix material to a car body. | 27th Jan 1936 | Box 102 \ 2 scan0179 | |
| Internal request to order two types of Seapak material from The Ruberoid Co. Ltd. for delivery to the Experimental Garage. | 30th Jan 1936 | Box 102 \ 2 scan0180 | |
| Request to place an official order for rubber packings and blocks. | 30th Jan 1936 | Box 102 \ 2 scan0181 | |
| Letter to Messrs. Thrupp & Maberly Ltd. requesting particulars of a rubber solution used on a 22-G-V body. | 3rd Feb 1936 | Box 102 \ 2 scan0182 | |
| Particulars of the rubber solution, Bortick No. 292 C., as used on the 22-G-IV body. | 5th Feb 1936 | Box 102 \ 2 scan0183 | |
| Increasing the length of headlamp pillars for fitting windhorns on the 25 HP chassis. | 10th Feb 1936 | Box 102 \ 2 scan0184 | |
| Issues with fitting Lucas wind tone horns to the 25 HP model, involving bracket modifications and coachwork clearance. | 26th Feb 1936 | Box 102 \ 2 scan0185 | |
| Proposal and testing of Silent Bloc rubber mountings on the 25 HP car. | 26th Mar 1936 | Box 102 \ 2 scan0186 | |
| Internal memorandum discussing the testing schedule for a Silent Bloc body mounting on a 25 HP car. | 4th Apr 1936 | Box 102 \ 2 scan0187 | |
| The reduction of the rear floor level on the 25/30 HP model due to a new third cross member design. | 9th May 1936 | Box 102 \ 2 scan0188 | |
| Letter to Park Ward & Co. about an experimental 'E' Steering Limousine body and dummy chassis. | 23th Sep 1936 | Box 102 \ 2 scan0189 | |
| Letter listing various chassis and body component drawings and discussing pricing arrangements. | 23th Sep 1936 | Box 102 \ 2 scan0190 | |
| Letter to Park Ward & Co. Ltd. concerning a foul on the front wings of Wide Frame 25/30 HP bodies. | 23th Dec 1937 | Box 102 \ 2 scan0191 | |
| Design drawing for a Hooper Sports Saloon body on a 25-30 HP chassis. | 23th Dec 1937 | Box 102 \ 2 scan0192 | |
| Suggesting an increase in the thickness of the rear brake shoe linings for a 20 HP model. | 6th Feb 1930 | Box 102 \ 3 scan0001 | |
| Suggesting a reduction in direct braking for a 20 HP car during a 10,000-mile test. | 6th Feb 1930 | Box 102 \ 3 scan0002 | |
| Recommending the thickening of front brake shoe linings for the Phantom II and 25 HP models. | 7th Feb 1930 | Box 102 \ 3 scan0003 | |
| Extract from quarterly complaints regarding brake squeaks on the 20 HP model. | 27th Feb 1930 | Box 102 \ 3 scan0004 | |
| Testing and production of 25 HP car brake squeak dampers. | 6th Mar 1930 | Box 102 \ 3 scan0005 | |
| Design and principle of an anti-squeaking device for road wheel brakes. | 30th May 1930 | Box 102 \ 3 scan0006 | |
| Testing scheme for a new road wheel brake device. | 4th Jun 1930 | Box 102 \ 3 scan0007 | |
| Methods to eliminate brake squeak by modifying brake shoes. | 4th Jun 1930 | Box 102 \ 3 scan0008 | |
| Standardisation of the GL.377 Operating Lever on the rear Brake Equalizing Shaft. | 25th Apr 1930 | Box 102 \ 3 scan0009 | |
| The 25 HP Japan model, discussing brakes, crankchamber modifications, and hill-climbing tests. | 1st Sep 1930 | Box 102 \ 3 scan0010 | |
| Cause of brake thumping on the 25 HP car and a proposed addition to the instruction manual. | 5th Sep 1930 | Box 102 \ 3 scan0011 | |
| Technical discussion on brake and clutch materials, heat dissipation, and performance issues. | 5th Sep 1930 | Box 102 \ 3 scan0012 | |
| Brake thumping issues on the 25 HP car and a proposed update to the instruction manual. | 5th Sep 1930 | Box 102 \ 3 scan0013 | |
| Technical discussion on brake system performance, focusing on friction materials, servo linings, and heat dissipation. | 5th Sep 1930 | Box 102 \ 3 scan0014 | |
| Temporary brake failure and extra crankcase oil for a 25 HP car in Japan. | 8th Sep 1930 | Box 102 \ 3 scan0015 | |
| Reviewing brake shoe design and comparing the brake lining areas of various cars. | 16th Dec 1930 | Box 102 \ 3 scan0016 | |
| Table detailing the dimensions of servo-operated front and rear brakes for various models. | 5th Dec 1929 | Box 102 \ 3 scan0017 | |
| Tabular blueprint detailing the particulars of servo-operated brakes for various car models. | 4th Dec 1930 | Box 102 \ 3 scan0018 | |
| 25 HP car in Japan, discussing a brake failure and crankcase oil levels. | 8th Sep 1930 | Box 102 \ 3 scan0019 | |
| Urgent order for special Ferodo brake linings for a 25HP chassis. | 12th Nov 1930 | Box 102 \ 3 scan0020 | |
| Proposal to test a special type of brake lining (AMR.2) on a 25HP car, with a contingency plan for testing in France. | 12th Nov 1930 | Box 102 \ 3 scan0021 | |
| The development and modification of brake drums and shoes for 25HP and 45HP cars. | 11th Dec 1930 | Box 102 \ 3 scan0022 | |
| Brake shoe design and lining areas for the 40/50 and 25 HP models, comparing them to other vehicles. | 16th Dec 1930 | Box 102 \ 3 scan0023 | |
| Specification table for the dimensions of servo-operated brakes on various car models. | 5th Dec 1929 | Box 102 \ 3 scan0024 | |
| Specification table for front and rear servo-operated brakes on various car models. | 4th Dec 1930 | Box 102 \ 3 scan0025 | |
| Modifications to the back axle, brake gear, and track width for a car with an increased power engine. | 16th Jan 1931 | Box 102 \ 3 scan0026 | |
| Potential cure for groaning rear brakes by adjusting the clearance of the shoe fulcrum pin. | 26th Jan 1931 | Box 102 \ 3 scan0027 | |
| Proposed modifications to the rear axle and brakes, including increasing axle shaft diameter and track width. | 31th Jan 1931 | Box 102 \ 3 scan0028 | |
| Secret memo regarding the design and schematics for the rear axle and brakes on the JAPAN 3 project. | 1st Feb 1931 | Box 102 \ 3 scan0029 | |
| Design of foot and hand brake differentials for the 'Japan 3' project. | 14th Feb 1931 | Box 102 \ 3 scan0030 | |
| Standardisation of a rear brake equaliser to reduce brake sponginess. | 15th Jan 1931 | Box 102 \ 3 scan0031 | |
| Standardization form detailing the first chassis fitment, test date, and costs for a new part. | 12th Feb 1931 | Box 102 \ 3 scan0032 | |
| Metallic noise from brake stops by proposing the re-application of a rubber buffer. | 27th Feb 1931 | Box 102 \ 3 scan0033 | |
| Suggestion to dispense with servo operation for brakes in favour of direct braking. | 21th Mar 1931 | Box 102 \ 3 scan0034 | |
| Unsuccessful results of a test to cure squeaking brakes by tapering the brake shoes. | 1st Apr 1931 | Box 102 \ 3 scan0035 | |
| Standardisation of front and rear brake shoes, .375' thick, for 20/25 HP Chassis. | 14th Jan 1931 | Box 102 \ 3 scan0036 | |
| Costs and implementation details for a new standardised chassis part. | 12th Feb 1931 | Box 102 \ 3 scan0037 | |
| Development and standardisation of brake systems, focusing on pivoted tips and shoe designs to reduce squeaks and improve performance. | 23th Apr 1931 | Box 102 \ 3 scan0038 | |
| Advantages of swivelling brake shoes and the intention to persevere with them. | 1st May 1931 | Box 102 \ 3 scan0039 | |
| Requesting the preparation of the latest Hancock brake shoes with Ferodo lining for experimental cars. | 29th Jun 1931 | Box 102 \ 3 scan0040 | |
| Design and production of rear axles and brakes, discussing alternative schematics. | 23th Sep 1931 | Box 102 \ 3 scan0041 | |
| Sending a scheme for a locomotive-type brake for storage. | 23th Sep 1931 | Box 102 \ 3 scan0042 | |
| Modifications to the front axle and brakes, referencing new schemes. | 13th Oct 1931 | Box 102 \ 3 scan0043 | |
| Standardisation of modified lubrication to rear brake actuating shafts. | 8th Oct 1931 | Box 102 \ 3 scan0044 | |
| Standardisation note for a chassis part detailing first fitment, testing, and tooling costs. | 16th Sep 1919 | Box 102 \ 3 scan0045 | |
| Request to manufacture a modified lever for a front equaliser shaft to increase front braking. | 9th Oct 1931 | Box 102 \ 3 scan0046 | |
| The brake performance of the 19-G-IV model after 15,000 miles, discussing potential causes for inefficiency. | 6th Nov 1931 | Box 102 \ 3 scan0047 | |
| Modifications to the brake linkage for the rear brakes. | 1st Dec 1931 | Box 102 \ 3 scan0048 | |
| Standardisation of chassis parts for an anti-squeak pivot type front brake. | 8th Oct 1931 | Box 102 \ 3 scan0049 | |
| Form detailing costs and the first chassis ('U' Series) for a new standardized part. | 1st Aug 1938 | Box 102 \ 3 scan0050 | |
| Confirming the use of standard rear brakes for the 20/25 HP Chassis 'U' Series. | 21th Jan 1932 | Box 102 \ 3 scan0051 | |
| Proportion of braking on front wheels and comparing braking systems and ratios across different car models. | 4th Mar 1932 | Box 102 \ 3 scan0052 | |
| Standardisation of the rear brake equalising shaft to suit the synchro mesh gearbox. | 8th Jan 1932 | Box 102 \ 3 scan0053 | |
| Standardisation sheet detailing the introduction of a new part to a chassis. | 19th Mar 1932 | Box 102 \ 3 scan0054 | |
| Adding central friction to the 25HP servo T lever to address brake thumps. | 6th May 1932 | Box 102 \ 3 scan0055 | |
| Experiments using a modified dash pot to cure servo-brake thumps on the 20/25HP car. | 28th Mar 1932 | Box 102 \ 3 scan0056 | |
| Modifications to a brake system to address 'thump' complaints and improve the damper and piston assembly. | 25th May 1932 | Box 102 \ 3 scan0057 | |
| Trialling a cheaper tubular riveting system on brake and clutch components for standardisation. | 12th Jul 1932 | Box 102 \ 3 scan0058 | |
| Test results for 25 HP brake clearances to prevent seizure. | 25th Jul 1932 | Box 102 \ 3 scan0059 | |
| Issues with brake shoe material and performance on the 20/25 model, proposing pressed steel as a solution. | 29th Jul 1932 | Box 102 \ 3 scan0060 | |
| Comparative test report on 25 HP rear brakes, comparing cast iron and aluminium brake straps. | 21th Jul 1932 | Box 102 \ 3 scan0061 | |
| Brake testing, comparing alum and cast iron straps and discussing clearance issues. | 21th Jul 1932 | Box 102 \ 3 scan0062 | |
| Graph comparing the loss of brake pedal movement due to heat between standard aluminium and cast iron brake shoes for the 20/25 model rear brakes. | 17th Mar 1932 | Box 102 \ 3 scan0063 | |
| Servo brake thumps in the 20/25 HP car, comparing dashpot and friction damping methods. | 17th Mar 1932 | Box 102 \ 3 scan0064 | |
| The elimination of 'thumps' on the Peregrine chassis by fitting a damper to the balance lever. | 17th Aug 1932 | Box 102 \ 3 scan0065 | |
| Experimental rig-up of a damper to cure brake thumps on a 20/25HP model. | 8th Aug 1932 | Box 102 \ 3 scan0066 | |
| Issues with 25-HP car brakes seizing up and 'thumping' due to insufficient clearance. | 8th Aug 1932 | Box 102 \ 3 scan0067 | |
| Braking leverage figures for the 'U' series 20/25 chassis. | 26th Aug 1932 | Box 102 \ 3 scan0068 | |
| Graph showing the results of 25 HP servo tests under various loading conditions. | 26th Jul 1933 | Box 102 \ 3 scan0069 | |
| Diagram showing brake leverages and operating levers for the Synchro Mesh Box. | 26th Jul 1933 | Box 102 \ 3 scan0070 | |
| Graph illustrating braking characteristics for the 20/25 HP 'U' series brakes. | 14th Sep 1932 | Box 102 \ 3 scan0071 | |
| Coupling brakes together to eliminate 'thumps' and the potential impact on the servo system. | 14th Sep 1932 | Box 102 \ 3 scan0072 | |
| Requesting the production of three specific levers for the J.111 brakes to align with the 20/25 HP model. | 4th Nov 1932 | Box 102 \ 3 scan0073 | |
| Increase in the proportion of braking on the front wheels for the 40/50 and 20/25 models. | 8th Nov 1932 | Box 102 \ 3 scan0074 | |
| Increase in front braking on the 58-GN model and the rationale for not altering the 20/25 model. | 9th Nov 1932 | Box 102 \ 3 scan0075 | |
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