| Description | Date | Identifier | |
| Requesting a system to track suggestions and failures from extended runs to prevent future issues and loss of information. | 7th Dec 1923 | Box 53 \ 4 Scan049 | |
| Qualifying report on a 10,000-mile test for production car 12-EM, detailing top speed, fuel consumption, and a universal joint issue. | 11th Dec 1923 | Box 53 \ 4 Scan050 | |
| Report investigating the causes of passenger sea-sickness during a 10,000 miles test. | 17th Dec 1923 | Box 53 \ 4 Scan051 | |
| Passenger motion sickness during a 10,000-mile test, analyzing potential causes including the position of the hood, fumes, and suspension. | 17th Dec 1923 | Box 53 \ 4 Scan052 | |
| Passenger's motion sickness during a 10,000-mile test, investigating factors like the car's hood, fumes, and springing. | 17th Dec 1923 | Box 53 \ 4 Scan053 | |
| Internal query requesting information. | 5th Dec 1923 | Box 53 \ 4 Scan054 | |
| Technical memo discussing the causes and remedies for passenger sickness in cars, such as vibration, rolling, and exhaust fumes. | 5th Dec 1923 | Box 53 \ 4 Scan055 | |
| Passenger sickness from exhaust fumes and proposing preventative measures. | 1st Jan 1924 | Box 53 \ 4 Scan056 | |
| Letter quoting T.B. Andre & Co. Ltd. regarding shock absorber and bearing issues on a 10,000 miles trial car. | 1st Jan 1924 | Box 53 \ 4 Scan057 | |
| Page 2 of a typed letter requesting a reply to be communicated to T.B. Andre & Co. | 1st Jan 1924 | Box 53 \ 4 Scan058 | |
| Instructions for changing engine oil and a proposal to address oil pressure failures for the 40/50 Chassis. | 15th Jan 1924 | Box 53 \ 4 Scan059 | |
| Involuntary stop due to oil pressure failure on Chassis No. 12-EM during a 10,000 miles trial run. | 15th Jan 1924 | Box 53 \ 4 Scan060 | |
| Conflict of opinion with Dunlop Rubber Co. regarding the condition of road wheels from a 40/50 HP Chassis. | 21th Jan 1924 | Box 53 \ 4 Scan061 | |
| Visit from Dunlop Rubber Co. Ltd. for the wheels of chassis 12-EM during its 10,000-mile trial run. | 23th Jan 1924 | Box 53 \ 4 Scan062 | |
| Attaching a list of points and actions taken from a 10,000-mile trial run on chassis 12-EM. | 24th Jan 1924 | Box 53 \ 4 Scan063 | |
| Listing points to be addressed and actions taken following a 10,000 miles trial run on Chassis No. 12-EM. | 5th Dec 1923 | Box 53 \ 4 Scan064 | |
| List of technical faults and the corresponding actions taken or proposed solutions. | 5th Dec 1923 | Box 53 \ 4 Scan065 | |
| List of points for review and actions taken on various vehicle components. | 5th Dec 1923 | Box 53 \ 4 Scan066 | |
| List of vehicle faults and the corresponding actions taken for issues with brakes, magneto, wheels, and tanks. | 5th Dec 1923 | Box 53 \ 4 Scan067 | |
| List of points to be addressed regarding vehicle components and the corresponding actions taken. | 22th Nov 1923 | Box 53 \ 4 Scan068 | |
| Letter from North & Sons Ltd. discussing the breakdown and redesign of an E.O.6 Magneto H.T. Collector Brush Holder. | 22th Nov 1923 | Box 53 \ 4 Scan069 | |
| Letter from Lucas Electrical Co. Ltd. regarding the examination of a returned dynamo due to bearing noise. | 28th Nov 1923 | Box 53 \ 4 Scan070 | |
| The inspection and repair of a noisy Watford Magneto from trial car chassis 12-EM. | 17th Jan 1924 | Box 53 \ 4 Scan071 | |
| Issue with locking rings on wire wheels and clarifying assembly responsibility with Dunlop Co. | 1st Dec 1923 | Box 53 \ 4 Scan072 | |
| Examination of a dynamo from a trial car, referencing a letter from Joseph Lucas Ltd. | 4th Jan 1924 | Box 53 \ 4 Scan073 | |
| Ball bearing clearance in dynamos to reduce noise and humming effects on a trial car. | 1st Jan 1924 | Box 53 \ 4 Scan074 | |
| Adjustment timing of Whittle belts for the dynamo and fan drives during a 10,000-mile test run. | 15th Jan 1924 | Box 53 \ 4 Scan075 | |
| Unsettled points from the 10,000-mile trial run report for Chassis No. 12-EM. | 24th Jan 1924 | Box 53 \ 4 Scan076 | |
| Outstanding issues following a 10,000-mile trial run for Chassis No. 12-EM. | 15th Jan 1924 | Box 53 \ 4 Scan077 | |
| Instructions for changing engine oil on the 40/50 Chassis and proposals to resolve oil pressure failures. | 15th Jan 1924 | Box 53 \ 4 Scan078 | |
| Responding to an enquiry about a 10,000-mile trial run on chassis No. 12-EM, discussing valve wear and piston ring clearance. | 29th Jan 1924 | Box 53 \ 4 Scan079 | |
| Correspondence with Dunlop Co. regarding wheel and rim issues on a 40/50 HP Chassis following a trial run. | 15th Feb 1924 | Box 53 \ 4 Scan080 | |
| Provision of a 20 HP car for the Demonstration School, the policy on using new vs older models, and transferring an experimental car. | 21th Aug 1923 | Box 53 \ 4 Scan081 | |
| The allocation of a 20 HP car to the Demonstration School and the use of experimental parts. | 22th Aug 1923 | Box 53 \ 4 Scan082 | |
| Delivery note for a 40/50 HP chassis, wheels, spares and tools. | 15th Sep 1922 | Box 53 \ 4 Scan083 | |
| Suggesting the new 20-HP Demonstration Cars be fitted with R.O.1 magnetos and a torque reaction damping device. | 13th Oct 1923 | Box 53 \ 4 Scan084 | |
| Alternative designs and fixing methods for piston pins in car and aero engines. | 1st Sep 1923 | Box 53 \ 4 Scan085 | |
| Experimental piston and gudgeon pin designs for the 'Condor' III aero engine. | 1st Sep 1923 | Box 53 \ 4 Scan086 | |
| Standardisation document for a design improvement to the piston pin locking screw. | 24th Sep 1923 | Box 53 \ 4 Scan087 | |
| Standardisation sheet for a Piston with a Floating Gudgeon Pin. | 11th Jun 1924 | Box 53 \ 4 Scan088 | |
| Alteration note for an aero engine piston with a floating gudgeon pin. | 19th May 1924 | Box 53 \ 4 Scan089 | |
| Testing 'L' shaped piston rings on 'Condor' and 'V' Series engines to reduce oil consumption. | 1st May 1925 | Box 53 \ 4 Scan090 | |
| Oil consumption tests using different piston ring configurations on a Condor III engine. | 11th May 1925 | Box 53 \ 4 Scan091 | |
| Urgent request for a test with 6:1 compression pistons, part number E.13289. | 1st Jul 1925 | Box 53 \ 4 Scan092 | |
| Proposal to standardize the isolation of the dashboard from the scuttle by replacing a rubber piece with an air space. | 18th Jul 1923 | Box 53 \ 4 Scan093 | |
| Insulation of car bodies from the dashboard to reduce vibration. | 18th Jul 1923 | Box 53 \ 4 Scan094 | |
| The mounting of car bodies on rubber buffers to reduce vibration. | 15th Aug 1923 | Box 53 \ 4 Scan095 | |
| Standardisation of chassis parts for the isolation of the scuttle from the dashboard to prevent booming and vibrations. | 27th Jul 1923 | Box 53 \ 4 Scan096 | |
| Two typed extracts from the Coachbuilders sub-committee meetings concerning scuttle separation and design schemes. | 27th Jul 1923 | Box 53 \ 4 Scan097 | |
| Sectional view showing the proposed separation of the scuttle of the body from the dashboard. | 12th Sep 1923 | Box 53 \ 4 Scan098 | |
| Methods to reduce engine heat in the passenger cabin. | 12th Sep 1923 | Box 53 \ 4 Scan099 | |
| Methods for reducing under-bonnet air temperature and comparing the 40/50 and 20 HP car models. | 19th Sep 1923 | Box 53 \ 4 Scan100 | |
| Standardisation of insulation between the dash and scuttle for the 20HP chassis. | 19th Sep 1923 | Box 53 \ 4 Scan101 | |
| Insulation and stiffening between the dash and scuttle for the 20 HP model. | 21th Sep 1923 | Box 53 \ 4 Scan102 | |
| Isolation of bodywork from the chassis to address a customer's complaint about vibrations. | 21th Sep 1923 | Box 53 \ 4 Scan103 | |
| Query regarding whether Mr. Royce viewed the separation dashboard scheme on Lord Herbert Scott's car. | 5th Oct 1923 | Box 53 \ 4 Scan104 | |
| Brief internal note confirming Mr. Royce did not examine Lord Herbert Scot's car in London. | 8th Oct 1923 | Box 53 \ 4 Scan105 | |
| The construction of an experimental landaulette body on stiffeners. | 22th Nov 1923 | Box 53 \ 4 Scan106 | |
| 20 HP body underframe suspension, dashboard construction, and modifications for the coachbuilder. | 1st Dec 1923 | Box 53 \ 4 Scan107 | |
| On the results of tests for insulating the exhaust to reduce heat on the floorboards and under the scuttle. | 21th Dec 1923 | Box 53 \ 4 Scan108 | |
| Tests to reduce heat on floorboards and under the scuttle of a 40/50 HP car. | 11th Dec 1923 | Box 53 \ 4 Scan109 | |
| Modifications to reduce floor and scuttle temperature. | 12th Jul 1923 | Box 53 \ 4 Scan110 | |
| Modifications to the undershield for mud protection and testing of cork covering for floorboards. | 11th Dec 1923 | Box 53 \ 4 Scan111 | |
| Tests of a double dash air insulated dashboard following complaints of cold air in the driver's footwell. | 12th Jul 1923 | Box 53 \ 4 Scan112 | |
| Test report comparing temperature readings inside a car under various insulation and modification conditions. | 11th Dec 1923 | Box 53 \ 4 Scan113 | |
| Graph plotting the relationship between top radiator water temperature and the air temperature at the rear of the fan. | 17th Oct 1923 | Box 53 \ 4 Scan114 | |
| Graphs detailing experiments to reduce floor-board temperature through various insulation and airflow modifications. | 23th Dec 1925 | Box 53 \ 4 Scan115 | |
| Extract from a visit report discussing scuttle isolation for the 20 HP model. | 12th Feb 1924 | Box 53 \ 4 Scan116 | |
| Excessive scuttle movement on the 40/50 chassis and the proposed remedy. | 22th Feb 1924 | Box 53 \ 4 Scan117 | |
| Scuttle isolation schemes for 20 HP and 40/50 cars. | 25th Feb 1924 | Box 53 \ 4 Scan118 | |
| Secret memorandum about isolating the 40/50 model scuttle and dash to reduce excessive movement. | 24th May 1924 | Box 53 \ 4 Scan119 | |
| Alteration to reduce heat from the floorboards and under the scuttle on cars undergoing testing in France. | 1st Jul 1924 | Box 53 \ 4 Scan120 | |
| Extract discussing issues with the 40/50 carburetter control on the instrument board and a proposed solution. | 10th Jul 1924 | Box 53 \ 4 Scan121 | |
| Methods for isolating the scuttle and instrument board on 20 HP 'B' and 'D' type cars to prevent rattles. | 14th Jul 1924 | Box 53 \ 4 Scan122 | |
| Methods to standardise scuttle isolation on the 20 HP chassis. | 18th Jul 1924 | Box 53 \ 4 Scan123 | |
| Proposals and existing schemes for scuttle isolation on the 20 HP chassis. | 22th Jul 1924 | Box 53 \ 4 Scan124 | |
| Scuttle isolation schemes for the 20 HP and 40/40 chassis. | 14th Aug 1924 | Box 53 \ 4 Scan125 | |
| Internal memorandum discussing the scuttle and dash isolation for the 20 HP and 40/50 HP chassis. | 1st Sep 1924 | Box 53 \ 4 Scan126 | |
| The accelerator pedal fouling the scuttle armature on the 40/50 HP chassis, proposing a wider dashboard as a solution. | 2nd Sep 1924 | Box 53 \ 4 Scan127 | |
| Scuttle isolation for the 20 HP and 40/50 HP models. | 19th Sep 1924 | Box 53 \ 4 Scan128 | |
| Urgent request to send scuttle isolation parts for two 40/50 chassis to Barkers at Olaf Street. | 25th Sep 1924 | Box 53 \ 4 Scan129 | |
| Difficulty and proposed solutions for instrument board and scuttle isolation on the 20 HP car with a raked column. | 4th Mar 1925 | Box 53 \ 4 Scan130 | |
| Modifications to steering columns and dashboards for future car models, specifically project 'India'. | 4th Mar 1925 | Box 53 \ 4 Scan131 | |
| 'V' Series scuttle isolation scheme. | 24th Mar 1925 | Box 53 \ 4 Scan132 | |
| Standardisation of the scuttle isolation scheme for 'V' series cars. | 4th Apr 1925 | Box 53 \ 4 Scan133 | |
| Secret memorandum discussing the standardization of 'V' series scuttle isolation and objections from coachbuilders. | 1st May 1925 | Box 53 \ 4 Scan134 | |
| Standardisation of scuttle isolation for the 20HP model. | 12th May 1925 | Box 53 \ 4 Scan135 | |
| Standardisation proposal for scuttle and dash isolation on the 40/50 chassis. | 12th May 1925 | Box 53 \ 4 Scan136 | |
| Standardisation sheet proposing a total isolation between the dashboard and body for the 'V' Series scuttle. | 12th May 1925 | Box 53 \ 4 Scan137 | |
| Proposal for a standardised scheme for 20HP scuttle and dash isolation. | 11th Jun 1925 | Box 53 \ 4 Scan138 | |
| Scuttle and dash isolation for the 20 HP model, comparing experiences with one versus two instrument board brackets. | 15th Jun 1925 | Box 53 \ 4 Scan139 | |
| Floorboards, hot air, and water ingress issues on chassis 8-EX. | 29th Oct 1925 | Box 53 \ 4 Scan140 | |
| Water leak complaint in the scuttle area after a sub-frame body was remounted. | 30th Oct 1925 | Box 53 \ 4 Scan141 | |
| Scuttle isolation and experimental steering column designs for the 20 HP chassis. | 9th Jan 1926 | Box 53 \ 4 Scan142 | |
| Inquiry regarding experiments on scuttle ventilation for 20 HP and 40/50 HP cars. | 30th Jan 1926 | Box 53 \ 4 Scan143 | |
| Querying the necessity of a standardisation sheet for an increase to the scuttle isolation gap. | 9th Apr 1926 | Box 53 \ 4 Scan144 | |
| Need for Sales signatures on a standardisation sheet for the scuttle isolation gap width. | 14th Apr 1926 | Box 53 \ 4 Scan145 | |
| Requesting the urgent manufacture of a plate for scuttle reinforcement for testing on experimental cars. | 12th Jul 1926 | Box 53 \ 4 Scan146 | |
| Use of stays for steering column support on 20 HP models with small columns and isolated scuttles. | 15th Jul 1926 | Box 53 \ 4 Scan147 | |
| Implementation of a self-supporting steering column for the 20 HP model. | 9th Jul 1926 | Box 53 \ 4 Scan148 | |
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