| Description | Date | Identifier | |
| The scheduling of a car, Chassis No. 117-MC, owned by G. Summers. | 18th Jul 1927 | Box 47 \ 2 Scan002 | |
| Customer's letter detailing vehicle performance issues, including oil consumption and steering, after a European trip. | 15th Jul 1927 | Box 47 \ 2 Scan003 | |
| The second page of a letter from Geoffrey Summers detailing feedback on a car's performance during a Continental run. | 19th Jul 1927 | Box 47 \ 2 Scan004 | |
| Quarterly report on prevalent complaints for New Phantom and late 20HP chassis. | 19th Jul 1927 | Box 47 \ 2 Scan005 | |
| Quarterly report summarizing customer complaints for the 40/50HP Phantom model. | 24th Jun 1927 | Box 47 \ 2 Scan006 | |
| Table of customer complaints, car counts, and remedial actions. | 24th Jun 1927 | Box 47 \ 2 Scan007 | |
| Summary table of vehicle complaints, the number of cars affected, and remarks on the remedies. | 23th Sep 1927 | Box 47 \ 2 Scan008 | |
| Sir John Latta's long-standing complaints about the springing and suspension on his 40/50 HP cars, specifically chassis No. 82-LC. | 23th Sep 1927 | Box 47 \ 2 Scan009 | |
| Vehicle suspension issues, specifically a 'kick' defect in the 20 HP model, comparing cantilever and elliptical springs. | 23th Sep 1927 | Box 47 \ 2 Scan010 | |
| Car's poor springing, detailing its weight distribution and original spring specifications. | 27th Sep 1927 | Box 47 \ 2 Scan011 | |
| Alterations to the springing on Sir John Latta's Chassis No. 82-LC for high-speed conditions. | 27th Sep 1927 | Box 47 \ 2 Scan012 | |
| Springing modifications for specific cars, including vehicle weight data and addressing a customer complaint about handling. | 29th Sep 1927 | Box 47 \ 2 Scan013 | |
| List of weight allowances for a car fitted with a sporting body. | 1st Oct 1927 | Box 47 \ 2 Scan014 | |
| Order and trial of 10-EX type springs on a closed car. | 1st Oct 1927 | Box 47 \ 2 Scan015 | |
| Altered method of rear springing for four specific cars. | 1st Oct 1927 | Box 47 \ 2 Scan016 | |
| Ordering and trial fitting of 10-EX type springs for car 65-EF, which is unavailable until after the Motor Show. | 3rd Oct 1927 | Box 47 \ 2 Scan017 | |
| Correspondence to coachbuilders Barkers & Co. regarding modifications to the springing on Capt. Kruse's car. | 4th Nov 1927 | Box 47 \ 2 Scan018 | |
| With recommendations regarding the suspension and steering for Captain Kruse's car. | 1st Nov 1927 | Box 47 \ 2 Scan019 | |
| Letter from coachbuilder Barker & Co. concerning a letter for Mr. Manning who is away at the Scottish Show. | 7th Nov 1927 | Box 47 \ 2 Scan020 | |
| Customer's noise complaint, comparing the performance of Dunlop and Michelin tyres on a Phantom car. | 9th Nov 1927 | Box 47 \ 2 Scan021 | |
| Harm and expense caused by Dunlop tyres. | 9th Nov 1927 | Box 47 \ 2 Scan022 | |
| Letter from coachbuilder Barker & Co. regarding alterations and delayed response concerning Captain Kruse's car. | 16th Nov 1927 | Box 47 \ 2 Scan023 | |
| Customer complaints about a knocking sound in Phantom engines at low speeds. | 23th Nov 1927 | Box 47 \ 2 Scan024 | |
| Diagnosis of a customer complaint regarding engine noise on a Phantom car. | 24th Nov 1927 | Box 47 \ 2 Scan025 | |
| List of reported worst features and required improvements for the 40/50 HP and 20 HP models. | 25th Nov 1927 | Box 47 \ 2 Scan026 | |
| Numbered list of required improvements and noted issues with a vehicle, page 2. | 25th Nov 1927 | Box 47 \ 2 Scan027 | |
| To arrange a discussion about finding a cure for Phantom Engine Knocks. | 25th Nov 1927 | Box 47 \ 2 Scan028 | |
| Strategy for handling incurable engine knocks in Phantom models. | 4th Nov 1927 | Box 47 \ 2 Scan029 | |
| Responding to a 'List of Worst Features' regarding vehicle faults and design issues. | 28th Nov 1927 | Box 47 \ 2 Scan030 | |
| List of numbered responses to issues regarding the Phantom and 20 HP models. | 25th Nov 1927 | Box 47 \ 2 Scan031 | |
| Minutes of a conference discussing a knock in the Phantom Engine. | 25th Nov 1927 | Box 47 \ 2 Scan032 | |
| Seeking instructions before incurring the expense of changing an early engine in Chassis No. 61-MC. | 28th Nov 1927 | Box 47 \ 2 Scan033 | |
| Customer complaints about a 'knock' in Phantom engines and the strategy for handling the issue. | 30th Nov 1927 | Box 47 \ 2 Scan034 | |
| Knocking issue in a Phantom engine for chassis 61-MC. | 1st Dec 1927 | Box 47 \ 2 Scan035 | |
| Customer complaint letter chasing a diagnosis for an engine knock on Chassis No. 61-MC. | 30th Nov 1927 | Box 47 \ 2 Scan036 | |
| Confirmation note for the handover of a 'Phantom' chassis and engine for investigation of an engine knock. | 13th Oct 1927 | Box 47 \ 2 Scan037 | |
| Noise and vibration issues with the latest pattern Michelin tyres compared to Dunlop patterns. | 1st Dec 1927 | Box 47 \ 2 Scan038 | |
| Investigation of a 'galloping knock' in car 84-LG and arrangements for testing and potential repairs. | 2nd Dec 1927 | Box 47 \ 2 Scan039 | |
| Engine knock issue with Major Victor Walker's car, chassis 7-LF. | 10th Dec 1927 | Box 47 \ 2 Scan040 | |
| Performance of two sets of stronger rear springs and their suitability for specific cars. | 12th Dec 1927 | Box 47 \ 2 Scan041 | |
| Discussion about a list of worst features compiled from customer complaints for the 40/50 HP and 20 HP models. | 16th Dec 1927 | Box 47 \ 2 Scan042 | |
| Test report on Major Victor Walker's car regarding an engine knock, body vibration, and steering issues. | 20th Dec 1927 | Box 47 \ 2 Scan043 | |
| Rear suspension settings and buffer clearances for the 40/50 model. | 23th Dec 1927 | Box 47 \ 2 Scan044 | |
| Customer complaint about steering and the proposed solution. | 23th Dec 1927 | Box 47 \ 2 Scan045 | |
| Chasing a reply to a previous letter. | 28th Dec 1927 | Box 47 \ 2 Scan046 | |
| Customer complaint letter regarding steering issues, road shock, and suitability for a female driver. | 31th Oct 1927 | Box 47 \ 2 Scan047 | |
| Memo on a telegram form discussing the urgent need to create patterns and castings for a 'C. Plate' component. | 26th Nov 1927 | Box 47 \ 2 Scan048 | |
| Letter to a customer regarding experiments and improvements on steering systems. | 28th Dec 1927 | Box 47 \ 2 Scan049 | |
| Brief typed memo requesting an update on the acceptance of a previous communication regarding 'worst features'. | 4th Jan 1928 | Box 47 \ 2 Scan050 | |
| Crankshaft damper stiction issues and potential solutions, including using woven cotton. | 1st Jan 1928 | Box 47 \ 2 Scan051 | |
| Engine thud and exhaust noise issues in current car models. | 17th Jan 1928 | Box 47 \ 2 Scan052 | |
| Customer complaints about thuds and a 'tingy' exhaust sound on the Phantom model. | 23th Jan 1928 | Box 47 \ 2 Scan053 | |
| Request to arrange for Geoffrey Summers' car to have a shorter pendulum lever fitted to the steering. | 23th Jan 1928 | Box 47 \ 2 Scan054 | |
| Investigation into the cause of a 'galloping knock' engine noise reported by customers. | 23th Jan 1928 | Box 47 \ 2 Scan055 | |
| Investigation into the cause of engine knock, focusing on slipper wheel settings and crankshaft torsion. | 23th Jan 1928 | Box 47 \ 2 Scan056 | |
| Analysis of torsional stress and engine knock related to the crankshaft and slipper wheels. | 23th Jan 1928 | Box 47 \ 2 Scan057 | |
| Letter to a customer regarding a suggested alteration to their car's steering mechanism. | 23th Jan 1928 | Box 47 \ 2 Scan058 | |
| Cutting down the time for an improvement to reach the customer, by scrutinizing if it is necessary to wait for 10,000 miles of testing. | 24th Jan 1928 | Box 47 \ 2 Scan059 | |
| Customer's car (48-H-0) fitted with a patented worm drive, with an offer for further testing. | 24th Jan 1928 | Box 47 \ 2 Scan060 | |
| Sending stiffer springs to Cricklewood for trials on Sir John Latta's car. | 27th Jan 1928 | Box 47 \ 2 Scan061 | |
| Letter to a customer regarding the fitting of a shorter pendulum lever to improve steering. | 27th Jan 1928 | Box 47 \ 2 Scan062 | |
| Lord Curzon's feedback on a Phantom vehicle, including notes on dampers, clutch, and controls. | 30th Jan 1928 | Box 47 \ 2 Scan063 | |
| Vehicle performance, focusing on speed, body design, compression, and carburation with references to Lord Curzon. | 24th Feb 1928 | Box 47 \ 2 Scan064 | |
| Unresolved issue of an 'elusive knock' in Phantom models, deferring a solution until a Technical Conference. | 24th Feb 1928 | Box 47 \ 2 Scan065 | |
| Investigation into 'Galloping Knock' on a Phantom, comparing Slipper Flywheel performance with Bakelite and cotton duck friction discs. | 24th Feb 1928 | Box 47 \ 2 Scan066 | |
| Limitations on performance improvements and the advantage of reduced loading. | 24th Feb 1928 | Box 47 \ 2 Scan067 | |
| Report confirming the successful repair of 'galloping knocks' on a Phantom Slipper Drive for chassis No. 60-EF. | 17th Mar 1928 | Box 47 \ 2 Scan068 | |
| Request for a car suffering from over-oiling to test a new, more permanent and less expensive correction scheme for Phantom engines. | 3rd Mar 1928 | Box 47 \ 2 Scan069 | |
| Steering modifications and parts fitted to car 117-MC for Geoffrey Summers, addressing issues with a 'jellying' scuttle. | 16th Mar 1928 | Box 47 \ 2 Scan070 | |
| Querying the purpose and undesirable results of drilling four holes in the petrol tank plug for chassis 21-UF. | 11th Apr 1928 | Box 47 \ 2 Scan071 | |
| Investigation into a customer's persistent complaints about the vehicle's springing. | 30th May 1928 | Box 47 \ 2 Scan072 | |
| Road testing the suspension and springs of chassis 11.UF with the owner. | 1st May 1928 | Box 47 \ 2 Scan073 | |
| Difficult customer's complaint about springing and proposing a test with 25% stiffer springs. | 1st May 1925 | Box 47 \ 2 Scan074 | |
| Plan to install stiffer rear springs for a customer, not to fix their complaint but to make them appreciate the original setup. | 31th May 1928 | Box 47 \ 2 Scan075 | |
| Quarterly report memo detailing prevalent complaints for the New Phantom and late 20 HP chassis for the quarter ending March 1928. | 9th Jun 1928 | Box 47 \ 2 Scan076 | |
| Quarterly complaints report for the 40/50 HP model listing issues, number of cars affected, and remarks. | 9th Jun 1928 | Box 47 \ 2 Scan077 | |
| Summary report on vehicle complaints, fault statistics, and remedial actions taken. | 9th Jun 1928 | Box 47 \ 2 Scan078 | |
| Summary of customer complaints, car counts, and corresponding engineering remarks. | 9th Jun 1928 | Box 47 \ 2 Scan079 | |
| Summary table of common vehicle complaints, number of cases, and proposed remedies. | 9th Jun 1928 | Box 47 \ 2 Scan080 | |
| Log sheet detailing a complaint about sticking exhaust cut-outs and the resolution. | 13th Apr 1928 | Box 47 \ 2 Scan081 | |
| Weights of new parts for the 40/50 HP chassis. | 13th Apr 1928 | Box 47 \ 2 Scan082 | |
| Quarterly complaints report for the 40/50 HP Phantom model for the quarter ending 30th June 1928. | 30th Jun 1928 | Box 47 \ 2 Scan083 | |
| Report page detailing customer complaints, the number of affected cars, and engineering remarks. | 30th Jun 1928 | Box 47 \ 2 Scan084 | |
| Quarterly report on customer complaints regarding water pumps, front wheel bearings, and vehicle springing, detailing numbers and remarks. | 30th Jun 1928 | Box 47 \ 2 Scan085 | |
| Vehicle complaints, the number of cars affected, and the corresponding remarks or solutions. | 11th Oct 1928 | Box 47 \ 2 Scan086 | |
| Air valve piston sticking in its cylinder on Chassis 58-AL when the engine is hot. | 11th Oct 1928 | Box 47 \ 2 Scan087 | |
| Fit and condition of a production air valve for chassis 58-AL. | 15th Oct 1928 | Box 47 \ 2 Scan088 | |
| Response suggesting ways to seal the change gear mechanism from the interior of Chassis 59-AL. | 19th Oct 1928 | Box 47 \ 2 Scan089 | |
| Quarterly report on complaints regarding the New Phantom and Late 20 HP chassis for the quarter ending September 1928. | 9th Nov 1928 | Box 47 \ 2 Scan090 | |
| Quarterly report of customer complaints for the 40/50 HP Phantom model. | 30th Sep 1928 | Box 47 \ 2 Scan091 | |
| Tabulated summary of vehicle complaints, detailing the nature and number of reported issues. | 30th Sep 1928 | Box 47 \ 2 Scan092 | |
| Summary table of car complaints, detailing the nature of the issue and the number of affected vehicles. | 26th Nov 1928 | Box 47 \ 2 Scan093 | |
| Customer P.S. Douglas Hamilton's Silver Ghost car (47-UF), its condition, and potential accessories. | 26th Nov 1928 | Box 47 \ 2 Scan094 | |
| Investigation into a hard riding complaint on Chassis No.39-FH with a Limousine body. | 6th Dec 1928 | Box 47 \ 2 Scan095 | |
| Springing complaint for chassis 7-RH, owned by Captain Edward Greene. | 13th Dec 1928 | Box 47 \ 2 Scan096 | |
| Letter discussing an ongoing customer complaint from Captain Edward Greene regarding the car's springing. | 12th Dec 1928 | Box 47 \ 2 Scan097 | |
| Customer complaint letter regarding the poor performance of new springs on chassis 7-EH. | 9th Dec 1928 | Box 47 \ 2 Scan098 | |
| Resolving a shock absorber issue for customer F.H. Blackmore's car, chassis GBM.21. | 3rd Jan 1929 | Box 47 \ 2 Scan099 | |
| Thin and light doors, lock, and window lifter on Mr. Minchin's Mulliner-Weyman bodied car. | 26th Jan 1929 | Box 47 \ 2 Scan100 | |
| Premature wear of a luggage grid on Chassis 33 CL in Australia, with suggestions for improvements. | 13th Mar 1929 | Box 47 \ 2 Scan101 | |
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