| Description | Date | Identifier | |
| Performance data for a Bijur Pump at different reservoir levels. | 30th Apr 1930 | Box 27 \ 1 Scan340 | |
| Test results for a Bijur Pump, 50% larger than standard, using Amber 'A' oil. | 30th Apr 1930 | Box 27 \ 1 Scan341 | |
| Road springs and damping for Phantom II and 25 HP models, discussing issues found with shock dampers and making recommendations. | 5th Apr 1930 | Box 27 \ 1 Scan342 | |
| Important complaint detailing design faults in the Phantom II shock damper and central lubrication system. | 5th May 1930 | Box 27 \ 1 Scan343 | |
| Oiling system modifications, damping failures causing seasickness, and an admission of design oversight. | 5th May 1930 | Box 27 \ 1 Scan344 | |
| Proposals for modifications to shock dampers for present and future production. | 10th May 1930 | Box 27 \ 1 Scan345 | |
| Schemes for front shock dampers and centralised lubrication for the 2nd L.H. Phantom II. | 11th May 1930 | Box 27 \ 1 Scan346 | |
| Design changes and proposals for the central lubrication system of front shock dampers. | 12th May 1930 | Box 27 \ 1 Scan347 | |
| The design and potential issues with rear dampers and coil placement. | 12th May 1930 | Box 27 \ 1 Scan348 | |
| Solutions for making the filling of the hypoid axle less difficult. | 17th May 1930 | Box 27 \ 1 Scan349 | |
| Modifications to the central oiling system and shock dampers. | 19th May 1930 | Box 27 \ 1 Scan350 | |
| Methods for the lubrication of an axle control ball end. | 22th May 1930 | Box 27 \ 1 Scan351 | |
| Central lubrication schemes for front and rear axles. | 28th May 1930 | Box 27 \ 1 Scan352 | |
| Two schemes for the centralized chassis lubrication dashboard pump. | 30th May 1930 | Box 27 \ 1 Scan353 | |
| The delayed adoption of aluminium drip plugs pending a chassis lubrication system redesign. | 3rd Jun 1930 | Box 27 \ 1 Scan354 | |
| From the Experimental Department deciding to standardise the axle lubrication scheme from the Bijur system. | 12th Jun 1930 | Box 27 \ 1 Scan355 | |
| Sending design schemes for the centralised chassis lubrication on the 20/25 HP model. | 24th Jul 1930 | Box 27 \ 1 Scan356 | |
| The centralised chassis lubrication system for the 20 HP front axle. | 18th Aug 1930 | Box 27 \ 1 Scan357 | |
| The piping arrangement on the rear axle for the 20/25 HP centralised chassis lubrication system. | 20th Aug 1930 | Box 27 \ 1 Scan358 | |
| Proposal to lubricate the dynamo from the central lubrication scheme on the Phantom II & 25 HP models. | 30th Aug 1930 | Box 27 \ 1 Scan359 | |
| Standardisation of a 50% increased capacity Bijur pump and improved filler. | 3rd Jun 1930 | Box 27 \ 1 Scan360 | |
| Oil and paraffin contamination of the servo suspension bracket's ferodo lining and proposing a solution. | 10th Sep 1930 | Box 27 \ 1 Scan361 | |
| Failure of Bijur drip plugs received from the production stores and fitted to chassis. | 1st Oct 1930 | Box 27 \ 1 Scan362 | |
| Standardisation of a central oiling system for front and rear axles. | 2nd Jun 1930 | Box 27 \ 1 Scan363 | |
| The central lubrication system of demonstration car 91-XJ, detailing an issue with insufficient oiling of the rear springs in hot climates. | 9th Oct 1930 | Box 27 \ 1 Scan364 | |
| The central lubrication system's supply to springs and felt pads, with a proposal to fit additional lubricators. | 9th Oct 1930 | Box 27 \ 1 Scan365 | |
| The investigation into failures of the central lubrication system pipes. | 3rd Nov 1930 | Box 27 \ 1 Scan366 | |
| Dryness of rear springs and the replacement of S.2 drip plugs with S.3 plugs to improve oil supply. | 12th Nov 1930 | Box 27 \ 1 Scan367 | |
| Failure of the central lubrication coil tubing for the rear axle and a proposed fix. | 3rd Dec 1930 | Box 27 \ 1 Scan368 | |
| Visit for Mr. Tweedie and the unfavourable outlook for a contract on a two-stroke unit. | 12th Jan 1933 | Box 27 \ 2 Scan001 | |
| Authorizing the charging of one gallon of petrol to a private account. | 13th Jan 1933 | Box 27 \ 2 Scan002 | |
| Suggesting a convenient day for Mr. Tweedie to visit. | 14th Jan 1933 | Box 27 \ 2 Scan003 | |
| Request to make and fit a spar with specified dimensions for mounting a condenser. | 17th Jan 1933 | Box 27 \ 2 Scan004 | |
| Vapour locking in petrol systems, proposing attendance at a joint S.B.A.C. and A.R.C. meeting. | 17th Jan 1933 | Box 27 \ 2 Scan005 | |
| Vapour lock issues in aero engines versus motor-cars and potential preventative measures. | 18th Jan 1933 | Box 27 \ 2 Scan006 | |
| Petty cash query regarding the purchase of a silencer and air cleaner from Chrysler Service Station for the Experimental Department. | 20th Jan 1933 | Box 27 \ 2 Scan007 | |
| Letter from Alleyne's Grammar School arranging a lecture. | 21th Jan 1933 | Box 27 \ 2 Scan008 | |
| Letter to C. Hawkins at Alleyne's Grammar School confirming the date and time for a lecture. | 23th Jan 1933 | Box 27 \ 2 Scan009 | |
| Recommending to charge a silencer to the 25 HP Experimental Order No. 54105. | 24th Jan 1933 | Box 27 \ 2 Scan010 | |
| Inquiry about a rumoured high-performance sporting super-charged car to compete in racing events. | 28th Jan 1933 | Box 27 \ 2 Scan011 | |
| Order for experimental work on making lead-bronze bearings for Aero Engines. | 1st Feb 1933 | Box 27 \ 2 Scan012 | |
| Disputed £10 bill from Aston Martin for an accident to car MU.2792. | 1st Feb 1933 | Box 27 \ 2 Scan013 | |
| Cancelling order number 512 for Experimental Department expenses due to misuse. | 4th Feb 1933 | Box 27 \ 2 Scan014 | |
| Request for assistance in locating a paper on thermocouples by Alcock. | 4th Feb 1933 | Box 27 \ 2 Scan015 | |
| Letter to Mr. H.J. Hatch clarifying the company's position on building racing cars. | 14th Feb 1933 | Box 27 \ 2 Scan016 | |
| Letter from M. A. McEvoy to Arthur Robotham regarding a transfer application and work on superchargers. | 21th Feb 1933 | Box 27 \ 2 Scan017 | |
| Letter to M.A. McEvoy discussing supercharger development and a membership application. | 22th Feb 1933 | Box 27 \ 2 Scan018 | |
| Letter from M. A. McEvoy to Arthur Robotham regarding supercharging, performance, and engine quietness. | 25th Feb 1933 | Box 27 \ 2 Scan019 | |
| Letter from the Showrooms requesting the B.HP for the 20/25 HP, Phantom II Continental, and PH.II long chassis models, with a handwritten reply. | 16th Mar 1933 | Box 27 \ 2 Scan020 | |
| The approximate clutch horse-powers for the P.11. Continental, P.11. Standard, and 20/25 HP chassis. | 18th Mar 1933 | Box 27 \ 2 Scan021 | |
| The correct procedure for addressing correspondence within a department. | 20th Mar 1933 | Box 27 \ 2 Scan022 | |
| Letter from M. A. McEvoy (London) Limited regarding the application of supercharging to touring cars. | 21th Mar 1933 | Box 27 \ 2 Scan023 | |
| Letter from M. A. McEvoy Ltd. to A. Robotham Esq. quoting press reviews on supercharged cars. | 21th Mar 1933 | Box 27 \ 2 Scan024 | |
| Request for a tour of the works for three friends on a Saturday morning. | 24th Mar 1933 | Box 27 \ 2 Scan025 | |
| Private memo about returning a two-reel film to be replaced with a better copy that includes Sir Malcolm Campbell's successful record attempt. | 28th Mar 1933 | Box 27 \ 2 Scan026 | |
| Requesting permission for an employee to use their personal aeroplane for company business. | 31th Mar 1933 | Box 27 \ 2 Scan027 | |
| Cancelling standing order number 801 and introducing new order numbers for tools in the Experimental Department, split between chassis and aero work. | 23th Oct 1934 | Box 27 \ 2 Scan028 | |
| Requesting an order for a fan and fittings for Delco-Remy & Hyatt Ltd to settle an account with Cadillac. | 7th Apr 1933 | Box 27 \ 2 Scan029 | |
| Requesting insurance coverage for a loaner car while the owner's car is being borrowed by Aston Martin's. | 11th Apr 1933 | Box 27 \ 2 Scan030 | |
| Telegram confirming the arrangement of registration and insurance for a loan car. | 13th Apr 1933 | Box 27 \ 2 Scan031 | |
| Letter requesting advice on how to silence the induction roar on a 'Minx' car after a carburetter change. | 19th Apr 1933 | Box 27 \ 2 Scan032 | |
| Letter to D.S. Paul of Anglo-American Oil Co, regarding the return of some films. | 19th Apr 1935 | Box 27 \ 2 Scan033 | |
| Letter discussing carburettor and intake silencer options for a 'Minx' vehicle. | 20th Apr 1933 | Box 27 \ 2 Scan034 | |
| Letter from Anglo-American Oil Company Limited regarding the return of films. | 24th Apr 1933 | Box 27 \ 2 Scan035 | |
| Inquiry regarding a process for creating a hard skin on aluminium to prevent piston seizure. | 26th Apr 1933 | Box 27 \ 2 Scan036 | |
| Anodic oxidation processes for skin hardening of aluminium. | 1st May 1933 | Box 27 \ 2 Scan037 | |
| Letter from Aircraft Exchange and Mart to W.A. Rowbotham announcing a new business partnership and requesting referrals. | 8th May 1933 | Box 27 \ 2 Scan038 | |
| Inquiry to Dunlop Rubber Co. Ltd. regarding low pressure tyres and wheels for a D.H. Moth aeroplane. | 8th May 1933 | Box 27 \ 2 Scan039 | |
| Letter to 'The Autocar' Map Department regarding a special offer for a map. | 19th May 1933 | Box 27 \ 2 Scan040 | |
| Experimental Reports following a change in personnel and office location. | 22th May 1933 | Box 27 \ 2 Scan041 | |
| Letter from The Autocar magazine regarding a request for their sectional map. | 23th May 1933 | Box 27 \ 2 Scan042 | |
| Thank you letter to 'The Autocar' for the offer of a free, linen-mounted map with rollers. | 24th May 1933 | Box 27 \ 2 Scan043 | |
| Query and a forthcoming discussion. | 25th May 1933 | Box 27 \ 2 Scan044 | |
| Letter from 'The Autocar' motoring journal confirming they are sending a wall map of England and Wales. | 25th May 1933 | Box 27 \ 2 Scan045 | |
| Letter of thanks to Messrs Iliffe & Sons Ltd. for a road map. | 27th May 1933 | Box 27 \ 2 Scan046 | |
| Personal letter discussing arrangements for attending the Tourists Trophy Race in the Isle of Man. | 9th Jun 1933 | Box 27 \ 2 Scan047 | |
| Letter on 'Splendide Royal & Excelsior' hotel stationery concerning arranging a car trial for a Bentley. | 12th Jun 1933 | Box 27 \ 2 Scan048 | |
| Letter discussing arrangements and a trip to the Isle of Man. | 12th Jun 1933 | Box 27 \ 2 Scan049 | |
| Letter discussing motor races, testing an Essex Terraplane, and arranging to test Feddon's Alfa Romeo. | 14th Jun 1933 | Box 27 \ 2 Scan050 | |
| Potential Phantom car purchase, a Terraplane at the track, and the completion of another vehicle. | 15th Jun 1933 | Box 27 \ 2 Scan051 | |
| Letter regarding a recruitment request from the Ethyl Export Corporation for a technically qualified agent in Paris. | 15th Jun 1933 | Box 27 \ 2 Scan052 | |
| Short typed memo confirming arrangements for a meeting in Derby. | 16th Jun 1933 | Box 27 \ 2 Scan053 | |
| Letter discussing arrangements for attending the Isle of Man races, running a Bugatti, and accommodation. | 22th Jun 1933 | Box 27 \ 2 Scan054 | |
| Letter to Professor C.E. Inglis at Cambridge requesting research on measuring airflow through Bentley poppet valves to improve engine power. | 22th Jun 1933 | Box 27 \ 2 Scan055 | |
| Request for sailing particulars to the Isle of Man for the T.T. car races. | 24th Jun 1933 | Box 27 \ 2 Scan056 | |
| Letter regarding travel arrangements to attend the T.T. races on the Isle of Man. | 24th Jun 1933 | Box 27 \ 2 Scan057 | |
| Letter from Cambridge Engineering Laboratory regarding research on the flow of air through poppet valves. | 24th Jun 1933 | Box 27 \ 2 Scan058 | |
| Arranging for a car to meet a train arriving in Derby. | 28th Jun 1933 | Box 27 \ 2 Scan059 | |
| Confirming the return of an Aston Martin car, MV.2792. | 28th Jun 1933 | Box 27 \ 2 Scan060 | |
| Cover note attaching a copy of a letter from The Society of Motor Manufacturers and Traders Limited. | 29th Jun 1933 | Box 27 \ 2 Scan061 | |
| Letter from the Society of Motor Manufacturers and Traders regarding petroleum fires caused by petrol leaks. | 21th Jun 1933 | Box 27 \ 2 Scan062 | |
| Log of accidents involving petroleum spirit during the fuelling of internal combustion engines from 1930 to 1933. | 21th Jun 1933 | Box 27 \ 2 Scan063 | |
| List of vehicle accidents detailing the nature and location. | 30th Jun 1933 | Box 27 \ 2 Scan064 | |
| Letter from Stewart Bent to a Mr. Rowbotham concerning a date mix-up for a race, a work visit, and opinions on Essex Terraplane and Alfa Romeo cars. | 30th Jun 1933 | Box 27 \ 2 Scan065 | |
| Typed letter of correspondence to Capt. Burt regarding a previous letter and interesting automobiles. | 4th Jul 1933 | Box 27 \ 2 Scan066 | |
| Requesting the circulation of a book titled 'Rubber and Automobiles'. | 4th Jul 1933 | Box 27 \ 2 Scan067 | |
| Requesting a car and arranging a meeting with 'Wood' due to an overnight stay for 'the Show'. | 5th Jul 1933 | Box 27 \ 2 Scan068 | |
| The routing of correspondence to the Sales department. | 10th Jul 1933 | Box 27 \ 2 Scan069 | |
| Letter to S. Smith & Sons Ltd requesting clock samples on approval from their catalogue. | 31th Jul 1933 | Box 27 \ 2 Scan070 | |
| Letter from Bernard Hopps to W. A. Robotham providing feedback on a Bentley test run and suggesting modifications for touring. | 1st Aug 1933 | Box 27 \ 2 Scan071 | |
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