| Description | Date | Identifier | |
| 10,000-mile test drive identifying a cracked steering column flange on a 'Phantom' car. | 3rd May 1926 | Morton \ M2.7 img019 | |
| The 10,000-mile test of a 20 HP car in France, detailing a cracked steering column flange and its replacement. | 1st May 1926 | Morton \ M2.7 img020 | |
| List of faults noted from reports and inspections of chassis No. 10-G-3 during a 10,000-mile test. | 26th May 1926 | Morton \ M2.7 img021 | |
| Faults and issues found on chassis number 10-G-3. | 16th Jun 1926 | Morton \ M2.7 img022 | |
| From Hs. to E. regarding the preparation of a 20 HP car for a 10,000-mile test in France. | 16th Jun 1926 | Morton \ M2.7 img023 | |
| 20 HP experimental car, its gear ratio, and upcoming performance tests. | 8th Feb 1927 | Morton \ M2.7 img024 | |
| Proposed reduction in axle ratio for the 20 HP car, considering engine crankshaft limitations. | 2nd Feb 1927 | Morton \ M2.7 img025 | |
| The handover of a 'Lorraine Dietrich' car and subsequent issues found on a trip to Paris. | 11th Apr 1927 | Morton \ M2.7 img026 | |
| Graph showing representative Ampere output curves for a 20 HP dynamo under various operating conditions. | 4th Mar 1924 | Morton \ M2.7 img027 | |
| EAC 'V' series engine oil consumption, comparing different piston designs and oil supply to bearings. | 1st Apr 1925 | Morton \ M3.1 img001 | |
| Graph comparing oil consumption versus R.P.M. for an E.A.C. Engine V Series at 3/4 full load, testing different piston and ring configurations. | 31th Mar 1925 | Morton \ M3.1 img002 | |
| Graph of oil consumption for E.A.C V Series engines with different pistons, calculated on power at full load. | 31th Mar 1928 | Morton \ M3.1 img003 | |
| 'V' series oil consumption tests involving crankcase baffles and piston ring configurations. | 6th Apr 1925 | Morton \ M3.1 img004 | |
| Continued report on testing 'L' shaped rings and their impact on engine oil consumption. | 1st Apr 1925 | Morton \ M3.1 img005 | |
| The failure of 'V' series pistons due to ten broken rings. | 1st Apr 1925 | Morton \ M3.1 img006 | |
| Oil consumption tests for the EAC 'V' Series car in France. | 15th Apr 1925 | Morton \ M3.1 img007 | |
| Piston and oil consumption, comparing different piston ring designs and testing methods. | 15th Apr 1925 | Morton \ M3.1 img008 | |
| Comparative oil temperature and consumption tests for 'V' series and 40/50 HP cars. | 1st Apr 1925 | Morton \ M3.1 img009 | |
| Testing 'V' Series pistons with different ring configurations to assess oil consumption. | 22th Apr 1925 | Morton \ M3.1 img010 | |
| Testing 'L' shaped piston rings on EAC 'V' Series and Condor engines. | 1st May 1925 | Morton \ M3.1 img011 | |
| Graph of oil consumption test bench results for an E.A.C. engine, comparing pistons with scraper rings to standard pistons with plain rings. | 19th May 1925 | Morton \ M3.1 img012 | |
| Inconsistent oil consumption results obtained with 'L' shaped piston rings. | 13th May 1925 | Morton \ M3.1 img013 | |
| Cylinder barrel temperature and expansion for the EAC engine, focusing on oiling issues. | 16th May 1925 | Morton \ M3.1 img014 | |
| Oil consumption issues related to piston and scraper ring design. | 19th May 1925 | Morton \ M3.1 img015 | |
| Car oil consumption, comparing trial results and detailing modifications to the low-pressure oil system. | 4th Jun 1925 | Morton \ M3.1 img016 | |
| Over-oiling on an EAC engine, with a proposed test to isolate the cause. | 6th Jun 1925 | Morton \ M3.1 img017 | |
| Secret memo regarding the production schedule and challenges of the 'W' Series body subframe, proposing the use of a modified 40/50 chassis. | 1st Mar 1925 | Morton \ M3.2 img001 | |
| Implications of introducing a stepped or recessed dashboard design. | 17th Jan 1925 | Morton \ M3.2 img002 | |
| The design of undershields and guards for 'V' & 'W' series chassis. | 1st Aug 1925 | Morton \ M3.2 img003 | |
| Modifications to the fabric engine coupling and the epicyclic starter gear on the gearbox. | 1st Jan 1925 | Morton \ M3.2 img004 | |
| Design improvements and testing for gears, shafts, and bearings. | 10th Jan 1925 | Morton \ M3.2 img005 | |
| Urgent arrangement of a fabric coupling on a gearbox shaft and specifications for motor coils. | 10th Jan 1925 | Morton \ M3.2 img006 | |
| Design and operation of a throttle governor, comparing the EAC and 40/50 chassis. | 1st Jan 1925 | Morton \ M3.2 img007 | |
| Approved alteration to the switch box, removing the need for a separate tumbler switch. | 17th Jan 1935 | Morton \ M3.2 img008 | |
| Simplification of ignition and charging switch schemes. | 9th Jan 1925 | Morton \ M3.2 img009 | |
| Requesting agreement to a proposal for modifications to switchbox contacts. | 21th Jan 1925 | Morton \ M3.2 img010 | |
| Secret memo regarding testing a carburetter with a smaller high speed throat and larger air valve. | 21th Jan 1925 | Morton \ M3.2 img011 | |
| Revisions and requirements for the body subframe of the 40/50 model. | 27th Jan 1925 | Morton \ M3.2 img012 | |
| Advantages and disadvantages of different ignition control systems, including magneto and battery options. | 1st Jan 1925 | Morton \ M3.2 img013 | |
| Secret memo from 'E.' to 'HS.' regarding the erection of 'V' series underguards and shields on chassis. | 28th Feb 1925 | Morton \ M3.2 img014 | |
| Secret 'V' Series memo urging progress on new side levers and detailing a specific 4-door cabriolet body for the steel underframe. | 13th Mar 1925 | Morton \ M3.2 img015 | |
| Proposing a revised design for steering box levers to eliminate friction and improve cost-effectiveness. | 5th Sep 1925 | Morton \ M3.2 img016 | |
| Secret memo discussing the weight and inertia of a new clutch and flywheel, with a request to reduce its weight and cost. | 13th Mar 1925 | Morton \ M3.2 img017 | |
| Piston failure and scraper rings, proposing modifications to reduce stress. | 16th Mar 1925 | Morton \ M3.2 img018 | |
| Piston failure, scraper rings, and a proposed new ring design with a sketch. | 17th Mar 1925 | Morton \ M3.2 img019 | |
| Review and proposed modifications for an adjustable throttle lever design. | 17th Mar 1925 | Morton \ M3.2 img020 | |
| Proposed modifications to pistons, referencing drawings for an experimental reinforced type and a standard type. | 3rd Mar 1925 | Morton \ M3.2 img021 | |
| Proposed modifications to pistons based on blueprint drawings Lec. 2029 and 2030. | 1st Mar 1925 | Morton \ M3.2 img022 | |
| Secret memo from 'R' to 'E.A.C.' proposing a modification to a piston design, including a diagram. | 19th Mar 1925 | Morton \ M3.2 img023 | |
| Modifications to a throttle governor control mechanism, including lever and roller designs. | 3rd Mar 1925 | Morton \ M3.2 img024 | |
| Potential causes and solutions for heavy steering, comparing the existing design with the Hispano type. | 1st Mar 1925 | Morton \ M3.2 img025 | |
| Proposal for a stronger 20HP piston and a multiple scraper ring scheme to prevent over-oiling for the India specification. | 23th Mar 1925 | Morton \ M3.2 img026 | |
| Secret memo from E. to H.S. discussing modifications to a throttle governor spring and dynamo drive. | 28th Mar 1925 | Morton \ M3.2 img027 | |
| Failure of a transmission coupling, its likely cause of torque overload, and potential design solutions. | 31th Mar 1925 | Morton \ M3.2 img028 | |
| Car manufacturing material stock, cost estimates, and proposed weight-saving modifications. | 26th Apr 1917 | Morton \ M3.3 img001 | |
| Design specifications for brake straps, rear springs, road wheels, and the procurement of alloy steels for drop forgings. | 28th May 1911 | Morton \ M3.3 img002 | |
| Decisions on radiators, ignition systems, and electrical components for cars. | 15th Feb 1917 | Morton \ M3.3 img003 | |
| Proposed improvements to valve springs, carburetter, air pump, undershield and brakes. | 15th Feb 1917 | Morton \ M3.3 img004 | |
| Brake testing, instrument board arrangement, and speedometer drive design. | 23th Jan 1918 | Morton \ M3.3 img005 | |
| Use of a 6-volt lighting system from an After-the-War model with an unorthodox gearbox. | 23th Jan 1918 | Morton \ M3.3 img006 | |
| Engine ignition issues, a request for parts, and details of repairs carried out. | 24th Jan 1918 | Morton \ M3.3 img007 | |
| Engine running backwards on Chassis 7-CA, with a sketch proposing a needle valve modification. | 30th Jan 1918 | Morton \ M3.3 img008 | |
| Failure of a magneto contact maker due to fibre swelling, proposing modifications to the cam and rocker. | 30th Jan 1918 | Morton \ M3.3 img009 | |
| Surprising efficiency results of the Lucas 20 lb starter motor test compared to previous models. | 25th Feb 1918 | Morton \ M3.3 img010 | |
| Modifications to improve the function of a trembler on a coil for 7-CA. | 2nd May 1918 | Morton \ M3.3 img011 | |
| Schematic diagram of a pin and cam actuating switch mechanism, including its method of control. | 2nd Jul 1918 | Morton \ M3.3 img012 | |
| The petrol consumption and engine performance of car 7 CA. | 12th Mar 1918 | Morton \ M3.3 img013 | |
| Request for improved four-volt and six-volt trembler coils for testing and experience purposes. | 26th Mar 1918 | Morton \ M3.3 img014 | |
| The progress of sales for Automobiles Rolls-Royce (France) Ltd, detailing chassis sales figures from 1910-1913. | 1st Oct 1913 | Morton \ M3.3 img015 | |
| Sales and market conditions in France and Spain, discussing coachbuilders, commissions, and sales figures for 1914. | 1st Oct 1913 | Morton \ M3.3 img016 | |
| Business conditions in Austria and Russia, referencing the Balkan war and the Alpenfahrt Trials. | 2nd Jul 1917 | Morton \ M3.3 img017 | |
| Poor design for a piston testing rig, with a promise to provide a better alternative soon. | 2nd Jul 1917 | Morton \ M3.3 img018 | |
| Policy memorandum regarding alterations and modifications for old type chassis. | 24th May 1919 | Morton \ M3.3 img019 | |
| Stiff and seized brake cable forks and proposing design improvements. | 4th Aug 1919 | Morton \ M3.3 img020 | |
| List of recommended and non-recommended improvements for early 40/50 HP cars. | 26th Apr 1917 | Morton \ M3.3 img021 | |
| List of notes and proposed improvements for vehicle components including radiators, carburetters, tool kits and oil systems. | 25th Oct 1920 | Morton \ M3.3 img022 | |
| Comparing the 'Condor', 'Eagle', and 'Falcon' aero engines against the Napier 'Lion' engine. | 25th Oct 1920 | Morton \ M3.3 img023 | |
| Testing and performance of a special four-volt trembler coil. | 24th Feb 1920 | Morton \ M3.3 img024 | |
| Test results and analysis of experimental work on trembler coils, including a table of their electrical properties. | 20th Feb 1920 | Morton \ M3.3 img025 | |
| Analysis of electrical coil performance, detailing issues with current stability, trembler fitting, and condenser connections. | 24th Feb 1920 | Morton \ M3.3 img026 | |
| Communication regarding the testing and performance of different electrical coils and tremblers. | 24th Feb 1920 | Morton \ M3.3 img027 | |
| The dispatch of a dummy chassis and other components to the coachbuilder, Messrs. Barkers. | 30th Sep 1924 | Morton \ M3.4 img001 | |
| 10,000-mile test in France concerning an adopted scheme of brakes. | 6th Jul 1924 | Morton \ M3.4 img002 | |
| Front spring failures, brake safety, and brake wear. | 20th Mar 1924 | Morton \ M3.4 img003 | |
| Findings on brake wear and steering spring performance. | 8th Jul 1924 | Morton \ M3.4 img004 | |
| Engine modifications, issues with guards, and servo gear noise. | 8th Jul 1924 | Morton \ M3.4 img005 | |
| Serious accident in France with car 35-PK during stiffer front spring testing. | 8th Aug 1924 | Morton \ M3.4 img006 | |
| High-speed steering and braking issues, car accidents, and ongoing tests. | 20th Aug 1924 | Morton \ M3.4 img007 | |
| Copy of Mr. Shepard's report on a car accident in Vigneux-sur-Barangeon, France. | 13th Aug 1924 | Morton \ M3.4 img008 | |
| Accident involving a 4-wheel brake test car in France. | 8th Aug 1924 | Morton \ M3.4 img009 | |
| Letter discussing a car accident involving car 35-PK, focusing on braking systems and speed. | 21th Aug 1924 | Morton \ M3.4 img010 | |
| Front spring failures during tests in France on a 40/50 HP Landaulet, chassis 9-PK, comparing two different suppliers. | 8th Aug 1924 | Morton \ M3.4 img011 | |
| Testing of rushed Firths springs for cars destined for France. | 1st Sep 1924 | Morton \ M3.4 img012 | |
| Defending the department against claims of wasting time and money by detailing car tests with new brakes and springs. | 1st Sep 1924 | Morton \ M3.4 img013 | |
| Car spring configurations and their effect on performance and comfort. | 9th Sep 1924 | Morton \ M3.4 img014 | |
| Road spring breakage statistics from tests on various car models in France. | 1st Sep 1924 | Morton \ M3.4 img015 | |
| Road spring failures, comparing on-road mileage tests with laboratory bump tests. | 5th Sep 1924 | Morton \ M3.4 img016 | |
| Over-heating, comparing the heat transfer to water in high versus low compression engines. | 1st Sep 1924 | Morton \ M3.4 img017 | |
| The relative amounts of heat rejected to cooling water in engines. | 1st Sep 1924 | Morton \ M3.4 img018 | |
| Comparing the engine cooling and petrol consumption of an E.A.C. car against a 40/50 HP model. | 8th Sep 1924 | Morton \ M3.4 img019 | |
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