| Description | Date | Identifier | |
| Request to review and update maintenance notes for B.V. and Corniche cars, noting deficiencies such as missing tyre pressures. | 2nd Jun 1940 | Box 139 \ 3 scan0250 | |
| Suggested additions for the second edition of the running and maintenance notes for B.V. & Corniche cars. | 5th Jun 1940 | Box 139 \ 3 scan0251 | |
| Requesting a review of running and maintenance notes for B.V. and Corniche cars to identify deficiencies. | 2nd Jun 1940 | Box 139 \ 3 scan0252 | |
| Availability and distribution of Bentley V preliminary instructions. | 29th May 1940 | Box 139 \ 3 scan0253 | |
| Confirming the dispatch of various Bentley instruction books and maintenance notes. | 22th Feb 1941 | Box 139 \ 3 scan0254 | |
| Supercharger options and the potential for building a new engine if current modifications are unsuccessful. | 11th May 1932 | Box 140 \ 1 scan0001 | |
| Design delays on the 'Bensport' model due to changing the supercharger position. | 29th Jun 1932 | Box 140 \ 1 scan0002 | |
| Urgency of a blower and induction pipe experiment for Bensport. | 28th Jun 1932 | Box 140 \ 1 scan0003 | |
| Blueprint for a Bensport engine with a side blower drive. | 2nd Jul 1932 | Box 140 \ 1 scan0004 | |
| Options for a fan drive and blower on the Bensport project, comparing a Powerplus blower with a new design. | 13th Aug 1932 | Box 140 \ 1 scan0005 | |
| Page 2 of a memo discussing a compromise design for a blower and its effect on the chassis layout. | 13th Aug 1932 | Box 140 \ 1 scan0006 | |
| Proposing an experiment to fit a Peregrine chassis with a Powerplus blower for road testing. | 13th Aug 1932 | Box 140 \ 1 scan0007 | |
| Design progress on the Bensport engine, supercharger, and fan drive, including challenges with the blower length. | 15th Aug 1932 | Box 140 \ 1 scan0008 | |
| Mr Eyston's opinion on the possibility of engine boiling if the fan is removed. | 15th Aug 1932 | Box 140 \ 1 scan0009 | |
| Use of a flat endless belt for the Bensport fan drive and blower. | 15th Aug 1932 | Box 140 \ 1 scan0010 | |
| Body options and modifications for a Bensport (Bentley 'B') chassis. | 16th Aug 1932 | Box 140 \ 1 scan0011 | |
| Supercharger and chassis specifications for the Bensport model. | 20th Aug 1932 | Box 140 \ 1 scan0012 | |
| Repositioning of the steering column and improvements to control springs on the 25 HP and Peregrine models. | 20th Aug 1932 | Box 140 \ 1 scan0013 | |
| Letter discussing a blueprint for mounting a Bensport blower and its effect on the radiator and starting handle. | 20th Aug 1932 | Box 140 \ 1 scan0014 | |
| Technical notes regarding a Powerplus blower for a Bensport car, covering delivery, specifications, and modifications. | 24th Aug 1932 | Box 140 \ 1 scan0015 | |
| Design notes on a blower, covering oil accumulation, fuel-oil mixing, and carburetor modifications. | 24th Aug 1932 | Box 140 \ 1 scan0016 | |
| The power testing and modification of a No.10 blower from Messrs. Powerplus. | 24th Aug 1932 | Box 140 \ 1 scan0017 | |
| The mounting and drive for a Bensport blower on the crankcase. | 24th Aug 1932 | Box 140 \ 1 scan0018 | |
| Design document detailing a special Bibby-type spring coupling for a blower. | 24th Aug 1932 | Box 140 \ 1 scan0019 | |
| Technical memorandum detailing the design and lubrication of a blower and crankshaft coupling. | 24th Aug 1932 | Box 140 \ 1 scan0020 | |
| Progress and challenges of supercharging the Peregrine engine for the Bensport car. | 21th Sep 1932 | Box 140 \ 1 scan0021 | |
| Completed design of a 2250 cc Bensport Blower, comparing it with a standard No.10 blower. | 23th Sep 1932 | Box 140 \ 1 scan0022 | |
| The merits and integration of a Roots-type blower, comparing it to other designs and considering modifications. | 23th Sep 1932 | Box 140 \ 1 scan0023 | |
| Design modifications and the fitting of a shortened Bensport Blower, referencing drawing LeC.3228. | 4th Oct 1932 | Box 140 \ 1 scan0024 | |
| Delays and modifications to the Bensport and Peregrine engines, specifically regarding engine length and low-speed torque. | 1st Oct 1932 | Box 140 \ 1 scan0025 | |
| The slow progress of the Bensport engine supercharger project and the consideration of a new supplier. | 1st Oct 1932 | Box 140 \ 1 scan0026 | |
| Lubrication of a supercharged engine (blower), referencing a Bugatti design. | 5th Oct 1932 | Box 140 \ 1 scan0027 | |
| Necessity of adding oil to petrol for supercharger lubrication on the 'Bensport' model. | 6th Oct 1932 | Box 140 \ 1 scan0028 | |
| Need for an additional test bench to expedite work on the supercharged Bensport engine. | 7th Oct 1932 | Box 140 \ 1 scan0029 | |
| The development and testing of superchargers for the Bentsport engine. | 7th Oct 1932 | Box 140 \ 1 scan0030 | |
| Design and modification of Powerplus and Rootes type superchargers. | 7th Oct 1932 | Box 140 \ 1 scan0031 | |
| Modifications and test failures of a Bensport/Powerplus blower. | 12th Oct 1932 | Box 140 \ 1 scan0032 | |
| Blower balance and bearing load calculations in relation to 'Bensport' and print LeC.3234. | 14th Oct 1932 | Box 140 \ 1 scan0033 | |
| Reliability and performance of various superchargers, including Bensport, Powerplus, and Rootes types. | 17th Oct 1932 | Box 140 \ 1 scan0034 | |
| Page regarding the requirement for a drawing of a Roots type blower for a Bensport engine. | 27th Oct 1932 | Box 140 \ 1 scan0035 | |
| Design modifications for a Roots-type Bensport blower, including rotors and gearing. | 27th Oct 1932 | Box 140 \ 1 scan0036 | |
| The despatch of a No.10 Powerplus Blower for free repair. | 23th Jun 1933 | Box 140 \ 1 scan0037 | |
| Providing the delivery address for a supercharger to Superchargers Limited for Mr G.E.T. Eyston. | 23th Jun 1933 | Box 140 \ 1 scan0038 | |
| Updated instructions and fuel recommendations for Powerplus Superchargers. | 3rd Jul 1933 | Box 140 \ 1 scan0039 | |
| Powerplus supercharger dispatched to Superchargers Ltd and plans for its future use in experiments. | 7th Jun 1933 | Box 140 \ 1 scan0040 | |
| Letter to Superchargers Limited regarding the return of a Powerplus Supercharger for fitting with new pumps. | 26th Jul 1933 | Box 140 \ 1 scan0041 | |
| The parts and modifications required to supercharge a Bentley chassis with a Powerplus Blower. | 1st Jan 1934 | Box 140 \ 1 scan0042 | |
| Note confirming instructions to modify a B-4 unit crankshaft to fit a Powerplus Supercharger on a Bentley. | 24th Apr 1934 | Box 140 \ 1 scan0043 | |
| Urgent request to Mr. Bradley for a wooden model of a supercharger to HR. 86. | 16th May 1934 | Box 140 \ 1 scan0044 | |
| Letter from Superchargers Limited regarding the supply of a Powerplus Supercharger for experimental use. | 16th May 1934 | Box 140 \ 1 scan0045 | |
| Letter to Powerplus Superchargers Ltd. regarding the experimental exchange of a No. 10 for a No. 11 blower. | 18th May 1934 | Box 140 \ 1 scan0046 | |
| Letter from Superchargers Limited declining a request to exchange a No. 10 for a No. 11 blower. | 25th May 1934 | Box 140 \ 1 scan0047 | |
| Request to arrange for a spare set of higher ratio worm gears for a Supercharged Bentley. | 6th Jun 1934 | Box 140 \ 1 scan0048 | |
| Requesting an additional Graham-Paige supercharger unit for parallel testing. | 19th Jun 1934 | Box 140 \ 1 scan0049 | |
| Arranging the purchase of a blower from Grahams for approximately £20. | 21th Jun 1934 | Box 140 \ 1 scan0050 | |
| Letter from Harrison Radiator Corporation requesting pamphlets on super-chargers from Mr. Laurence Pomeroy, Jr. | 19th Jun 1934 | Box 140 \ 1 scan0051 | |
| Letter to Laurence Pomeroy Jr. recommending collaboration with an American expert on radiators and cooling systems. | 3rd Jul 1934 | Box 140 \ 1 scan0052 | |
| Letter from M. A. McEvoy (London) Ltd. regarding a mailing list for technical notes. | 7th Jul 1934 | Box 140 \ 1 scan0053 | |
| Letter to The Harrison Radiator Corporation regarding radiator core thickness specifications and a blueprint. | 9th Jul 1934 | Box 140 \ 1 scan0054 | |
| Potential purchase of a second Graham Blower (supercharger) for a Bentley. | 20th Jul 1934 | Box 140 \ 1 scan0055 | |
| Request to build and fit a Graham supercharger, distributor head, and dynamo. | 18th Jul 1934 | Box 140 \ 1 scan0056 | |
| Letter from Graham-Paige Motors Corporation confirming the dispatch of a blower unit free of charge. | 9th Jul 1934 | Box 140 \ 1 scan0057 | |
| The Graham Car Supercharger. | 23th Jul 1934 | Box 140 \ 1 scan0058 | |
| Description and test results for a Graham Car Supercharger. | 23th Jul 1934 | Box 140 \ 1 scan0059 | |
| Continued analysis of blower and supercharger performance characteristics, including boost, efficiencies, and engine power. | 23th Jul 1934 | Box 140 \ 1 scan0060 | |
| Report page detailing the effects of removing the carburetter and an easing joint washer on blower performance, with comments on running. | 25th Jul 1934 | Box 140 \ 1 scan0061 | |
| General conclusion and a table of leading particulars for a Graham blower. | 23th Jul 1934 | Box 140 \ 1 scan0062 | |
| Performance characteristic graph for a Graham Car Supercharger with carburetter, less air cleaner, using petrol at 3000 engine RPM. | 18th Jun 1934 | Box 140 \ 1 scan0063 | |
| Performance characteristics graph for a Graham Car Supercharger at 1000 engine RPM. | 15th Jun 1934 | Box 140 \ 1 scan0064 | |
| Performance characteristic graph for a Graham Car Supercharger at 2000 Engine RPM. | 15th Jun 1934 | Box 140 \ 1 scan0065 | |
| Performance characteristics graph for a Graham Car Supercharger with carburetter and without an air cleaner. | 16th Jun 1934 | Box 140 \ 1 scan0066 | |
| Performance characteristics graph for a Graham car supercharger with carburetter less air cleaner at 3500 engine RPM. | 18th Jun 1934 | Box 140 \ 1 scan0067 | |
| Performance characteristics graph for a Graham Car Supercharger at 3000 engine RPM. | 18th Jun 1934 | Box 140 \ 1 scan0068 | |
| Letter concerning the supply of a supercharger and an issue with engine detonation. | 30th Jul 1934 | Box 140 \ 1 scan0069 | |
| Letter from Laycock Engineering Co regarding the supply of Layrub Patented Couplings. | 12th Oct 1934 | Box 140 \ 1 scan0070 | |
| Advice note for the despatch of two Layrub patented couplings from Laycock Engineering Co. | 26th Oct 1936 | Box 140 \ 1 scan0071 | |
| Letter from Laycock Engineering Co. regarding the supply of Layrub Couplings. | 1st Nov 1934 | Box 140 \ 1 scan0072 | |
| Letter to The Laycock Engineering Co. confirming a design modification for couplings. | 3rd Nov 1934 | Box 140 \ 1 scan0073 | |
| Requesting a duralumin rotor for a Graham Supercharger due to high-speed testing concerns. | 12th Nov 1934 | Box 140 \ 1 scan0074 | |
| Modifications to a duralumin impeller for a car supercharger to reduce clearance. | 15th Nov 1934 | Box 140 \ 1 scan0075 | |
| Requesting the creation of parts for an auto boost control system for a Bentley. | 16th Nov 1934 | Box 140 \ 1 scan0076 | |
| Experiments and durability testing of a Graham supercharger on a Bentley. | 15th Nov 1934 | Box 140 \ 1 scan0077 | |
| Requesting a modification to the pipe on a Supercharged Unit B-12 to improve slow running. | 7th Dec 1934 | Box 140 \ 1 scan0078 | |
| Blueprint drawing of an induction pipe for a supercharged Bentley. | 7th Dec 1934 | Box 140 \ 1 scan0079 | |
| Design of a supercharger for a Bentley engine, referencing print Hs.1642. | 8th Dec 1934 | Box 140 \ 1 scan0080 | |
| Blueprint of the leading dimensions for a Bentley supercharger. | 6th Dec 1934 | Box 140 \ 1 scan0081 | |
| Requesting an examination of a Graham Blower after 10,000 miles and discussing an order for new gears. | 12th Dec 1934 | Box 140 \ 1 scan0082 | |
| Three alternative schemes for positioning a B-12 supercharged unit. | 13th Dec 1934 | Box 140 \ 1 scan0083 | |
| Replacement of 'Layrub' couplings with Hardy couplings to reduce gear drive noise on Supercharged Unit B-12. | 13th Dec 1934 | Box 140 \ 1 scan0084 | |
| Troubles with gear noise and slow running on a supercharged Bentley. | 13th Dec 1934 | Box 140 \ 1 scan0085 | |
| Blueprint for a high-power Straight '8' engine for a Bentley chassis, focusing on supercharger induction systems. | 15th Dec 1934 | Box 140 \ 1 scan0086 | |
| Expressing urgency to complete supercharger tests before the arrival of Spectre and Wraith engines. | 13th Dec 1934 | Box 140 \ 1 scan0087 | |
| Trialling a Buick hot spot on the test bed exhaust system for a Graham Supercharger on a B-12 unit. | 17th Dec 1934 | Box 140 \ 1 scan0088 | |
| Durability, slow running, and mechanical reliability of centrifugal superchargers. | 18th Dec 1934 | Box 140 \ 1 scan0089 | |
| Technical report on supercharging a Bentley engine, discussing power curves, boost levels, and blower efficiency. | 18th Dec 1934 | Box 140 \ 1 scan0090 | |
| Summary of the positive experience with centrifugal blowers (superchargers) on cars like the Bentley, predicting their future standardization. | 16th Dec 1934 | Box 140 \ 1 scan0091 | |
| Power curve graph comparing a naturally aspirated Bentley engine with estimated and measured supercharged configurations. | 17th Dec 1934 | Box 140 \ 1 scan0092 | |
| Communication regarding the circulation of a progress report on the Bentley supercharger. | 19th Dec 1934 | Box 140 \ 1 scan0093 | |
| Inquiring about progress on putting a supercharger on the Bentley chassis, with a handwritten reply. | 18th Dec 1934 | Box 140 \ 1 scan0094 | |
| Data summary from test bed runs of a Graham Supercharger fitted to a Bentley. | 19th Dec 1934 | Box 140 \ 1 scan0095 | |
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