| Description | Date | Identifier | |
| Four technical points or modifications to a vehicle. | 3rd Aug 1934 | Box 18 \ 4 Scan130 | |
| Instructions for fitting Cadillac type automatic tappets to SG's car 104-MY. | 3rd Aug 1934 | Box 18 \ 4 Scan131 | |
| Confirmation of arrangements for work on car 104-MY and the temporary use of a loaner car, 20-G-1V. | 23th Aug 1934 | Box 18 \ 4 Scan132 | |
| Instruction regarding Sg's Car to replace the Marles-Weller steering with a standard one and return it to the makers. | 28th Aug 1934 | Box 18 \ 4 Scan133 | |
| From J.S. to Hs. regarding the return of Sg's car. | 30th Aug 1934 | Box 18 \ 4 Scan134 | |
| Specification revision for Chassis 104-MY and Engine Unit No.KB.25, detailing changes to the steering and rear axle. | 3rd Sep 1934 | Box 18 \ 4 Scan135 | |
| Modifications made to car 104-MY, including the fitting of Cadillac silent tappets. | 5th Sep 1934 | Box 18 \ 4 Scan136 | |
| Effectiveness of draughtless ventilation systems in closed coachwork. | 2nd Apr 1935 | Box 18 \ 4 Scan137 | |
| Expressing a negative opinion on the 'Fisher Scheme of Ventilation' after several months of use. | 9th Apr 1935 | Box 18 \ 4 Scan138 | |
| The removal of experimental parts from car 104-MY before its sale and delivery. | 12th Apr 1935 | Box 18 \ 4 Scan139 | |
| Listing engine parts to be retained or made standard, specifically relating to the cylinder head and oil system. | 17th Apr 1935 | Box 18 \ 4 Scan140 | |
| Leaving hydraulic tappets on a sold car and advising the new owner on future decarbonising. | 18th Apr 1935 | Box 18 \ 4 Scan141 | |
| Successful use of larger brake drums on a customer's Phantom II car and proposing experimental brakes for his future vehicles. | 2nd Feb 1934 | Box 18 \ 5 Scan001 | |
| Brake and engine modifications for a Mr. Fairey's car and future considerations for other models. | 5th Feb 1934 | Box 18 \ 5 Scan002 | |
| From Sg. to Hs. about correspondence with Mr. Fairey and developments concerning camshafts and rockers. | 6th Feb 1934 | Box 18 \ 5 Scan003 | |
| Letter regarding the inspection of experimental brakes on a Phantom II car. | 6th Feb 1934 | Box 18 \ 5 Scan004 | |
| Mr. Fairey's Phantom II car being sent for examination due to metal in the sump, and discussing a potential overhaul. | 8th Feb 1934 | Box 18 \ 5 Scan005 | |
| Confirming the expected arrival of Mr. Fairey's car in Derby for an overhaul and inspection of brake components. | 12th Feb 1934 | Box 18 \ 5 Scan006 | |
| Letter from a customer reporting metal in the crankcase of his Phantom and requesting a full overhaul. | 12th Feb 1934 | Box 18 \ 5 Scan007 | |
| Letter to C.R. Fairey of Fairey Aviation concerning a report on his car's brakes and a discussion about the Bentley model. | 15th Feb 1934 | Box 18 \ 5 Scan008 | |
| Review of an overhaul estimate for Mr. Fairey's car before it is sent to him. | 15th Feb 1934 | Box 18 \ 5 Scan009 | |
| A customer's, Mr. Fairey, dissatisfaction with his 40/50 HP car, chassis 20-PY. | 28th Feb 1934 | Box 18 \ 5 Scan010 | |
| Customer complaint letter from C. P. Fairey regarding performance issues with a new 'Phantom' car. | 20th Feb 1934 | Box 18 \ 5 Scan011 | |
| Modifications to the engine valves and guides for chassis 1-GN, Gliksten Esq. | 2nd Mar 1934 | Box 18 \ 5 Scan012 | |
| Work on valves and cylinder heads for Chassis 1-GW belonging to Gliksten Esq. | 2nd Mar 1934 | Box 18 \ 5 Scan013 | |
| Instructions for maintenance and performance restoration on Mr. Fairey's Phantom II, chassis 34-GN. | 17th Aug 1934 | Box 18 \ 5 Scan014 | |
| Inspection and testing of shock dampers on chassis No. 34-GN for Mr. Fairey. | 22th Aug 1934 | Box 18 \ 5 Scan015 | |
| Performance work on chassis 34-GN for Mr. Fairey, referencing its previous speed at Brooklands. | 23th Aug 1934 | Box 18 \ 5 Scan016 | |
| Note requesting braking distance information for Chassis 147 RY, with the data subsequently added by hand. | 8th Sep 1934 | Box 18 \ 5 Scan017 | |
| Braking performance test results for chassis 147-RY. | 10th Sep 1934 | Box 18 \ 5 Scan018 | |
| Customer feedback letter from Paris regarding car 70 SK and the service received. | 29th Dec 1934 | Box 18 \ 5 Scan019 | |
| Closing lines and signature from a handwritten letter. | 12th Jan 1935 | Box 18 \ 5 Scan020 | |
| Suggestions for work on car 36-PY, referencing work done on car 20-PY. | 12th Jan 1935 | Box 18 \ 5 Scan021 | |
| Customer complaint from Major A.H. Wilkie about the performance of his Phantom II Continental car. | 9th Jan 1935 | Box 18 \ 5 Scan022 | |
| Engine improvements and performance of chassis 36-PY for Major A.H. Wilkie. | 15th Jan 1935 | Box 18 \ 5 Scan023 | |
| Conversation regarding Sir Malcolm Campbell's satisfaction with his Bentley and his original Phantom 34-GN. | 18th Jan 1935 | Box 18 \ 5 Scan024 | |
| Internal memorandum discussing the modifications and performance of Mr. Fairey's old car, 34-GN. | 21th Jan 1935 | Box 18 \ 5 Scan025 | |
| Visit from Mr. Emmott of Borg & Becks to have his Phantom worked on and a request for a tour. | 7th Feb 1935 | Box 18 \ 5 Scan026 | |
| List of complaints for a 40/50 HP chassis belonging to Mr. W.E. Emmott. | 8th Feb 1935 | Box 18 \ 5 Scan027 | |
| Customer complaint letter regarding faulty brakes on a Continental Phantom, chassis 80 MS. | 12th Feb 1935 | Box 18 \ 5 Scan028 | |
| Page 2 of a letter detailing persistent braking problems on a Phantom II and a reference to an Autocar article. | 14th Dec 1934 | Box 18 \ 5 Scan029 | |
| Customer complaint letter regarding poor brake performance on a 3.5 litre Bentley and a Phantom. | 14th Dec 1934 | Box 18 \ 5 Scan030 | |
| The final page of a typed letter signed by E. M. Thomas and addressed to Hives Esq. | 13th Feb 1935 | Box 18 \ 5 Scan031 | |
| Customer complaint regarding brake performance on a Phantom, chassis 80-MS. | 13th Feb 1935 | Box 18 \ 5 Scan032 | |
| Summary of brake troubles and repairs for chassis number 80-MS. | 14th Feb 1935 | Box 18 \ 5 Scan033 | |
| Internal memorandum regarding a customer's braking issue on chassis 80-MS and the proposed modifications. | 20th Feb 1935 | Box 18 \ 5 Scan034 | |
| Alterations for Mr. Thomas's car and arranging for it to be sent to the Works. | 22th Feb 1935 | Box 18 \ 5 Scan035 | |
| Letter to a customer regarding post-service car performance, specifically the carburettor, springs, and shock absorbers. | 25th Feb 1935 | Box 18 \ 5 Scan036 | |
| Arrangements to retrieve Mr. Thomas' car, chassis number 80-MS. | 27th Feb 1935 | Box 18 \ 5 Scan037 | |
| Letter to a customer about an opportunity to improve their car's brakes at the Experimental Department. | 27th Feb 1935 | Box 18 \ 5 Scan038 | |
| Customer thank you letter regarding car improvements. | 1st Mar 1935 | Box 18 \ 5 Scan039 | |
| Letter from a customer arranging for car repairs including brakes, a top overhaul, and decarbonization. | 2nd Mar 1935 | Box 18 \ 5 Scan040 | |
| Letter to a customer confirming an appointment to bring their car to the works. | 4th Mar 1935 | Box 18 \ 5 Scan041 | |
| Brake efficiency and a decarbonisation request for chassis 80-MS. | 4th Mar 1935 | Box 18 \ 5 Scan042 | |
| Instruction to fit a longer differential lever for a front brake equaliser and modify the undertray to accommodate it. | 13th Mar 1935 | Box 18 \ 5 Scan043 | |
| Letter to a customer confirming the time and date for their car delivery. | 14th Mar 1935 | Box 18 \ 5 Scan044 | |
| Modification to the front equaliser lever on Mr. Thomas' Car, 80-MS. | 15th Mar 1935 | Box 18 \ 5 Scan045 | |
| Customer's persistent braking issues on Chassis 80-MS, the investigation, and the proposed solution. | 15th Mar 1935 | Box 18 \ 5 Scan046 | |
| Follow-up letter regarding the repair of ineffective brakes for a customer's car and potential further adjustments. | 18th Mar 1935 | Box 18 \ 5 Scan047 | |
| Letter to Mr. Robotham thanking him for his interest in a car and promising future feedback on the brakes. | 22th Mar 1935 | Box 18 \ 5 Scan048 | |
| Postscript to a letter discussing cracking issues with a 3 1/2 Bentley's saloon body. | 1st Apr 1935 | Box 18 \ 5 Scan049 | |
| Letter from E.M. Thomas to Mr Robotham proposing a scheme for adjusting front and rear shock dampers. | 1st Apr 1935 | Box 18 \ 5 Scan050 | |
| Letter to Mr. G.M. Thomas regarding a suggested scheme and feedback on his car's brakes. | 3rd Apr 1935 | Box 18 \ 5 Scan051 | |
| Letter from a customer to Mr Robotham regarding the excellent performance of new brakes on his car. | 8th Apr 1935 | Box 18 \ 5 Scan052 | |
| To Mr. de Romero regarding a customer complaint about a car's carburettor and requesting his advice for a fix. | 9th Apr 1935 | Box 18 \ 5 Scan053 | |
| Letter to Mr. Thomas concerning the improved performance of his brakes. | 10th Apr 1935 | Box 18 \ 5 Scan054 | |
| Cover note for an attached letter from Mr. Thomas regarding chassis 80-MS. | 10th Apr 1935 | Box 18 \ 5 Scan055 | |
| Carburetter issue and repair request for Mr. de Romero's car, chassis 199-RY. | 10th Apr 1935 | Box 18 \ 5 Scan056 | |
| The return of a carburettor for car 199-RY to Mr. de Romero. | 11th Apr 1935 | Box 18 \ 5 Scan057 | |
| Acknowledging customer satisfaction regarding Chassis No. 80-MS. | 13th Apr 1935 | Box 18 \ 5 Scan058 | |
| Investigation into a carburation 'luffing up' complaint on car 199-RY, resolved by reducing the low speed jet size. | 24th Apr 1935 | Box 18 \ 5 Scan059 | |
| Customer complaint letter regarding brake fade and erratic servo action. | 8th May 1935 | Box 18 \ 5 Scan060 | |
| Page 2 of a letter from E.M. Thomas inviting W.A. Robotham to test drive a car. | 9th May 1935 | Box 18 \ 5 Scan061 | |
| Letter to Mr. G.M. Thomas regarding a visit to Brooklands to try his car. | 9th May 1935 | Box 18 \ 5 Scan062 | |
| Letter regarding a customer complaint about carburation failures and suspected petrol boiling on chassis 163-TA. | 14th Aug 1935 | Box 18 \ 5 Scan063 | |
| Short typed memo concerning the special handling required for an important client, Mr. Verrells. | 19th Aug 1935 | Box 18 \ 5 Scan064 | |
| Fix for a vapour lock issue on chassis 163-TA by fitting an isolating plate. | 19th Aug 1935 | Box 18 \ 5 Scan065 | |
| Letter seeking advice on the best method to change a fanbelt, either by removing the radiator or the engine. | 27th Aug 1935 | Box 18 \ 5 Scan066 | |
| Letter to G.M. Thomas regarding the difficulty of changing a fan belt. | 10th Sep 1935 | Box 18 \ 5 Scan067 | |
| Letter from coachbuilders Park Ward & Co. Ltd. inquiring about fitting a second-hand body to car 22-EX and asking for its history. | 11th Sep 1935 | Box 18 \ 5 Scan068 | |
| Letter to Park Ward & Co. Ltd. regarding chassis 22-EX, confirming subframe and delivery details. | 13th Sep 1935 | Box 18 \ 5 Scan069 | |
| From Sg. to Hs. regarding Mr. E.M. Thomas, enclosing a copy of a letter. | 25th Sep 1935 | Box 18 \ 5 Scan070 | |
| Letter arranging to inspect a customer's car following a complaint about the brakes. | 25th Sep 1935 | Box 18 \ 5 Scan071 | |
| Customer's complaint about an oil leak affecting the brakes. | 4th Oct 1935 | Box 18 \ 5 Scan072 | |
| Communication with a Mr. Thomas about a visit to Brooklands. | 4th Oct 1935 | Box 18 \ 5 Scan073 | |
| Letter to a customer regarding brake repairs on their Phantom II car and a potential new car purchase. | 4th Oct 1935 | Box 18 \ 5 Scan074 | |
| Page 2 of a typed letter discussing car handling, comparing it to a Bentley, and requesting feedback. | 4th Oct 1935 | Box 18 \ 5 Scan075 | |
| Telegram sent to Robotham at the Experimental department in Derby regarding a car being brought the next morning. | 17th Oct 1935 | Box 18 \ 5 Scan076 | |
| Confirming delivery details for chassis 80-MS to Mr. Thomas. | 9th Oct 1935 | Box 18 \ 5 Scan077 | |
| Thank-you letter from S.A. Thomas to Mr. Robotham regarding a visit to Derby and the new Phantom. | 8th Oct 1935 | Box 18 \ 5 Scan078 | |
| Owner over-lubricating their car's brakes by misinterpreting the instruction manual. | 9th Oct 1935 | Box 18 \ 5 Scan079 | |
| Clarifying a customer's complaint about oil-flooded brakes. | 10th Oct 1935 | Box 18 \ 5 Scan080 | |
| Letter from a customer to Mr. Robotham regarding car servicing, commenting on brake improvements and a minor oil trace. | 13th Oct 1935 | Box 18 \ 5 Scan081 | |
| Follow-up note from a customer regarding a potential oil leak. | 14th Oct 1935 | Box 18 \ 5 Scan082 | |
| Letter to a customer regarding brake trouble caused by excessive Bijur lubrication and oil on the servo. | 14th Oct 1935 | Box 18 \ 5 Scan083 | |
| Letter to Mr. Robotham seeking confirmation on the usage frequency for the Bijur lubricator. | 6th Oct 1935 | Box 18 \ 5 Scan084 | |
| Letter discussing the source of an oil leak found on a servo. | 6th Oct 1935 | Box 18 \ 5 Scan085 | |
| Letter discussing a crankcase oil leak and a visit to a Mercedes Benz showroom. | 6th Oct 1935 | Box 18 \ 5 Scan086 | |
| Continuation of a handwritten letter of thanks regarding car maintenance at Derby after recent races. | 17th Mar 1936 | Box 18 \ 5 Scan087 | |
| Request for advice on petrol and oil for a customer travelling to the U.S.A. | 17th Mar 1936 | Box 18 \ 5 Scan088 | |
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