| Description | Date | Identifier | |
| Blueprint schematic of a double main pressure regulating valve explaining its operation. | 4th Apr 1932 | Box 179 \ 3 img173 | |
| Increasing the wheelbase to 10 ft 6 ins due to the front positioning of the supercharger. | 10th Aug 1932 | Box 179b \ 1 img001 | |
| The design, cost, and performance of Peregrine shock dampers. | 10th Aug 1932 | Box 179b \ 1 img002 | |
| Issues with the Peregrine starter motor stalling and proposing alterations to the winding and gear ratio. | 10th Aug 1932 | Box 179b \ 1 img003 | |
| Request for a wheel, tyre, and dummy hub for the Bensport - Bentley 'B' Model bodywork. | 11th Aug 1932 | Box 179b \ 1 img004 | |
| Confirming an agreement on modifying steering column controls for both RR and Bentley cars. | 8th Aug 1932 | Box 179b \ 1 img005 | |
| Progress report on the Bensport chassis, discussing challenges with the supercharger, fan drive, and hand brake lever. | 13th Aug 1932 | Box 179b \ 1 img006 | |
| Issues with Peregrine controls, specifically the spring pressure and the change speed lever, with proposed solutions. | 13th Aug 1932 | Box 179b \ 1 img007 | |
| Modifications to the gear lever shaft for the 25HP model. | 16th Aug 1932 | Box 179b \ 1 img008 | |
| Seeking clarification on the design origin of the Peregrine front axle control. | 1st May 1938 | Box 179b \ 1 img009 | |
| Requesting a sample set of wheels and a dummy hub for a Bensport Bentley '3' model. | 16th Aug 1932 | Box 179b \ 1 img010 | |
| Alterations to car body designs for Saloons and Coupes, including bonnet modifications. | 16th Aug 1932 | Box 179b \ 1 img011 | |
| Revised Benlyport layout, superseding a previous version and instructing on part ordering. | 18th Aug 1932 | Box 179b \ 1 img012 | |
| Modifications to the 'J. 3. Type' shock damper piston to reduce manufacturing costs. | 19th Aug 1932 | Box 179b \ 1 img013 | |
| Design considerations for the Bensport chassis, including supercharger proportions and control layouts. | 20th Aug 1932 | Box 179b \ 1 img014 | |
| Gear modifications and ratios for the Peregrine & Belsport rear axles. | 20th Sep 1932 | Box 179b \ 1 img015 | |
| Troubleshooting history and ongoing design improvements for shock dampers. | 20th Aug 1932 | Box 179b \ 1 img016 | |
| Sending an obsolete drawing, sch 3523, showing the layout of Bensport with the overhead camshaft engine. | 20th May 1932 | Box 179b \ 1 img017 | |
| Modifications to the Peregrine & Bensport starter motor to improve performance. | 20th Aug 1932 | Box 179b \ 1 img018 | |
| Query about altering the travel of the reverse shaft to increase gear overlap. | 22th Aug 1932 | Box 179b \ 1 img019 | |
| Request for a critique on a new damper piston design to reduce manufacturing costs. | 1st Aug 1936 | Box 179b \ 1 img020 | |
| Borg & Beck clutch experiment on a 25HP model, with reference to alternative design schemes. | 23th Aug 1932 | Box 179b \ 1 img021 | |
| Latest arrangement of the gearbox and clutch, referencing scheme N. sch. 3526. | 24th Mar 1932 | Box 179b \ 1 img022 | |
| Decision on a shorter propeller tube and a Lancia-style separate bearing design. | 25th Mar 1932 | Box 179b \ 1 img023 | |
| Modifications to the front dumb iron and the position of the wing stay and lamp bracket for a new chassis layout. | 27th Aug 1932 | Box 179b \ 1 img024 | |
| New scheme for a Bensport steering column support. | 27th Aug 1932 | Box 179b \ 1 img025 | |
| Layout of the chassis front end, detailing the starting handle, blower position, and axle modifications. | 27th Aug 1932 | Box 179b \ 1 img026 | |
| Commenting on the design of a Donflex clutch disc, specifically regarding spring softening and slipping surface area. | 27th Aug 1932 | Box 179b \ 1 img027 | |
| Comparing gearbox configurations for Peregrine and Bensport models. | 27th Aug 1932 | Box 179b \ 1 img028 | |
| Letter sending a blueprint and specifications for a two-stroke sleeve valve compression ignition test unit. | 31th Mar 1932 | Box 179b \ 1 img029 | |
| Improvements of a new type of circular condenser for battery ignition. | 31th Aug 1932 | Box 179b \ 1 img030 | |
| Technical memorandum discussing calculations for the theoretical whirling speed of a Peregrine propeller shaft. | 15th May 1932 | Box 179b \ 1 img031 | |
| Phenomenon of 'brake thumps' and proposing an experimental oil dashpot as a solution. | 20th Aug 1932 | Box 179b \ 1 img032 | |
| Telegram confirmation regarding propeller vibration attributed to the overhang of the coupling on the flexible tailshaft of the gearbox. | 23th Aug 1932 | Box 179b \ 1 img033 | |
| Propeller shaft whirl, vibration, and proposed design modifications to address these issues. | 24th Aug 1932 | Box 179b \ 1 img034 | |
| Whirling speed of propeller shafts and potential reasons for calculation failures. | 1st Aug 1932 | Box 179b \ 1 img035 | |
| Telegram confirmation regarding permanent designs for a separate gearbox and propeller shaft testing. | 25th Aug 1932 | Box 179b \ 1 img036 | |
| Push rod engine behaviour and central ignition plugs for the T.T. Race. | 31th Aug 1932 | Box 179b \ 1 img037 | |
| Fuel consumption issues with the J.3. & Peregrine carburetter. | 31th Aug 1932 | Box 179b \ 1 img038 | |
| Outlining scheme 3530, detailing a supplementary transmission shaft to reduce the propeller shaft length for the Peregrine model. | 1st Sep 1932 | Box 179b \ 1 img039 | |
| Diagram for the Peregrine foot linkage and supplementary propeller shaft. | 11th Sep 1932 | Box 179b \ 1 img040 | |
| Modifications to the Peregrine frame's brake differential cross member. | 1st Sep 1932 | Box 179b \ 1 img041 | |
| Engine design, fuel systems, and key mechanical improvements like the gearbox and crankshaft. | 3rd Sep 1932 | Box 179b \ 1 img042 | |
| Engine development strategy and the relative merits of different fuel delivery systems. | 3rd Sep 1932 | Box 179b \ 1 img043 | |
| Listing vehicle sections and components related to the Bensport and Peregrine projects. | 3rd Sep 1932 | Box 179b \ 1 img044 | |
| List of outstanding sections and details awaiting a ruling for a vehicle project. | 1st Sep 1932 | Box 179b \ 1 img045 | |
| Errors in the clutch mechanism due to engine flexibility and outlining proposed modifications. | 1st Sep 1932 | Box 179b \ 1 img046 | |
| Tolerance limits for ball bearings in the 25HP & Peregrine gearbox. | 6th Sep 1932 | Box 179b \ 1 img047 | |
| Modifications to the Peregrine gearbox, replacing 1.BA. studs with .250 bolts. | 1st Sep 1932 | Box 179b \ 1 img048 | |
| Potential engine failure causes and solutions for Lord Wakefield's boat, Miss England III. | 7th Sep 1932 | Box 179b \ 1 img049 | |
| Delivery of bodies, wheels, hubs, and tools for Peregrine and Bensport models. | 7th Sep 1932 | Box 179b \ 1 img050 | |
| The toolset for Bensport vehicles and the delivery schedule for car bodies. | 7th Sep 1932 | Box 179b \ 1 img051 | |
| Observations and proposed solutions regarding heat in the driving compartment, focusing on heat radiated from the dashboard and hot air leaks. | 7th Sep 1932 | Box 179b \ 1 img052 | |
| Issues with cabin heat from gas leaks and scuttle ventilation, proposing solutions and requesting data from Derby. | 5th Apr 1934 | Box 179b \ 1 img053 | |
| List of recommendations for vehicle body and component fittings, including dash covering, blueprints, pedal stems, and ventilation. | 7th Sep 1932 | Box 179b \ 1 img054 | |
| With a sketch suggesting the use of diagonal rods to secure an engine to the frame. | 7th Sep 1932 | Box 179b \ 1 img055 | |
| Preference for a short engine and bonnet, the need for more than six cylinders, and commissioning a design for a 12-cylinder Vee engine. | 1st Aug 1932 | Box 179b \ 1 img056 | |
| The supply of various lamps and accessories for Peregrine bodies to the coachbuilder Messrs Park Ward. | 10th Sep 1932 | Box 179b \ 1 img057 | |
| Modifications to the Phantom III clutch operation and pedal assembly. | 10th Sep 1932 | Box 179b \ 1 img058 | |
| Design and casting of a Bensport dashboard fixing to the frame. | 10th Sep 1932 | Box 179b \ 1 img059 | |
| The Bensport accelerator pedal design, comparing it to a similar one made for Peregrine. | 10th Sep 1932 | Box 179b \ 1 img060 | |
| Chronic noise of the 2nd gear and evaluating the implementation of synchromesh or helical gears as a solution. | 13th Sep 1932 | Box 179b \ 1 img061 | |
| Unexpected troubles with petrol pumps, potential causes, and a proposed research plan. | 12th Sep 1932 | Box 179b \ 1 img062 | |
| The procurement of Lucas lamps and other accessories for two Bensport car bodies. | 13th Sep 1932 | Box 179b \ 1 img063 | |
| Wheel and tyre specifications and their impact on body panelling for the Peregrine car. | 13th Sep 1932 | Box 179b \ 1 img064 | |
| Potential brake system modifications to eliminate brake thumps and the implications for servo performance. | 14th Sep 1932 | Box 179b \ 1 img065 | |
| Expressing reservations about the S.U. carburetter, detailing modifications for the Bensport engine and highlighting potential safety concerns. | 14th Sep 1932 | Box 179b \ 1 img066 | |
| Engine specifications for the proposed new 40/50 model, including cylinder count and bore size. | 14th Sep 1932 | Box 179b \ 1 img067 | |
| The J.3/J.2 & Peregrine front engine mounting, suggesting the use of thicker steel or drop forgings to reduce flexibility. | 14th Sep 1932 | Box 179b \ 1 img068 | |
| New design for the Peregrine clutch operation and the consideration of a provisional patent. | 14th Sep 1932 | Box 179b \ 1 img069 | |
| Unexpectedly high propeller shaft thrust and proposing design modifications or alternative joint systems to mitigate it. | 14th Sep 1932 | Box 179b \ 1 img070 | |
| Design, materials, and performance of brake servos, considering temperature effects and alternative braking systems. | 14th Sep 1932 | Box 179b \ 1 img071 | |
| Confirming design changes to the Bensport front springs and engine position for improved clearance. | 15th Sep 1932 | Box 179b \ 1 img072 | |
| Modification to the Peregrine engine clutch operation scheme. | 16th Sep 1932 | Box 179b \ 1 img073 | |
| Confirmation of a phone message regarding the redesign and simplification of the J.3 & Peregrine clutch. | 16th Sep 1932 | Box 179b \ 1 img074 | |
| Chassis lubrication options for the Bensport model, recommending a centralized system. | 17th Sep 1932 | Box 179b \ 1 img075 | |
| Print of the crankshaft for the Kestrel J. 111 engine, noting the inclusion of balance weights. | 19th Sep 1932 | Box 179b \ 1 img076 | |
| Required modifications for the Bentsport front engine suspension. | 19th Sep 1932 | Box 179b \ 1 img077 | |
| Pending decision on pressed steel brake shoes. | 20th Sep 1932 | Box 179b \ 1 img078 | |
| Bensport clutch operation and pedal arrangement for the Peregrine engine. | 21th Sep 1932 | Box 179b \ 1 img079 | |
| The Bensport rear engine supporting crossmember, front brake/differential, and clutch pedal arrangement. | 21th Sep 1932 | Box 179b \ 1 img080 | |
| Seven improvements for the Peregrine Clutch based on test results. | 9th Sep 1932 | Box 179b \ 1 img081 | |
| Responding to criticisms of the J. 3. Luggage Grid and detailing proposed modifications. | 22th Sep 1932 | Box 179b \ 1 img082 | |
| Controls on the steering column for the Bensport model, including carburetter controls and steering wheel options. | 22th Sep 1932 | Box 179b \ 1 img083 | |
| Rubber coupling for the Peregrine clutch and suggestions for spigot bearing lubrication. | 24th Sep 1932 | Box 179b \ 1 img084 | |
| Modifications and new gear ratios for the Bensport gearbox of separate construction. | 24th Sep 1932 | Box 179b \ 1 img085 | |
| Confirmation of a telephone message regarding issues and improvements for the Peregrine & Bensport engine head joint. | 26th Sep 1932 | Box 179b \ 1 img086 | |
| Of numbered points discussing potential modifications to engine components like exhaust valves, studs and gaskets. | 30th Sep 1932 | Box 179b \ 1 img087 | |
| Modifications and suggestions for the P. 2. clutch on the 19-EX model. | 30th Sep 1932 | Box 179b \ 1 img088 | |
| The Bensport side steering tube, noting an expected additional 2° angle on the R.H. lock. | 30th Sep 1932 | Box 179b \ 1 img089 | |
| Engine reliability testing, focusing on the differences in stress between high and low-speed running. | 21th Oct 1932 | Box 179b \ 1 img090 | |
| Sending a design for the Continental Phantom touring saloon with a revised tail and increased luggage accommodation. | 1st Oct 1932 | Box 179b \ 1 img091 | |
| Design and alignment of the Bensport gearbox, comparing it to other synchro mesh boxes. | 18th Mar 1932 | Box 179b \ 1 img092 | |
| Issues with single-plate clutches and the development of corrected and multi-plate designs. | 1st Oct 1932 | Box 179b \ 1 img093 | |
| Performance of a new single valve shock damper and potential redesigns for its automatic control pump. | 1st Oct 1932 | Box 179b \ 1 img094 | |
| Advantages of direct-acting Bensport brakes over servo, hydraulic, and vacuum-assisted systems. | 1st Oct 1932 | Box 179b \ 1 img095 | |
| Gearbox design, specifically freewheel placement and the use of helical versus straight gears. | 1st Oct 1932 | Box 179b \ 1 img096 | |
| Secret memo regarding the proposed 12-cylinder 'SPECTRE' Vee engine. | 1st Oct 1932 | Box 179b \ 1 img097 | |
| The problems of standardising bonnet length for 'C', 'E', and 'F' type steering configurations. | 5th Oct 1932 | Box 179b \ 1 img098 | |
| From 'R.' to 'HS.' regarding delays and technical considerations for the Bensport and Peregrine engines. | 4th Oct 1932 | Box 179b \ 1 img099 | |
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