| Description | Date | Identifier | |
| Note on an engine regulating device designed to reduce power upon failure until near the ground. | 1st Jun 1917 | Morton \ M8 img024 | |
| Fitting of different piston types and rings to Commander Brigg's car. | 4th Jul 1917 | Morton \ M8 img025 | |
| Proposed engine and suspension modifications, and observations on braking and bodywork issues. | 4th Jul 1917 | Morton \ M8 img026 | |
| Proposed car alterations to prevent tyres rubbing the body, awaiting approval from a Commander Briggs. | 2nd May 1917 | Morton \ M8 img027 | |
| Proposed design changes for the 7 CA car engine, including piston, connecting rod, and camshaft modifications. | 2nd May 1917 | Morton \ M8 img028 | |
| Requirements and modifications for an experimental car, including springing, tyres, and engine components. | 11th May 1917 | Morton \ M8 img029 | |
| Proposed modifications to the 7 CA car engine, including pistons, connecting rods, and camshafts. | 2nd May 1917 | Morton \ M8 img030 | |
| Potential car modifications including the back axle, induction pipe, and gear ratios for improved performance and economy. | 12th May 1918 | Morton \ M8 img031 | |
| Responding to a laboratory report on spring steels and suggesting further testing on the Upton-Lewis machine. | 8th Aug 1917 | Morton \ M8 img032 | |
| Modifications and the urgent dispatch of the 'Falcon' engine for America. | 13th Aug 1917 | Morton \ M8 img033 | |
| Testing of a new magneto model for future aero engines. | 28th Aug 1917 | Morton \ M8 img034 | |
| Porosity of a new piston alloy and agreeing to tests without zinc or tin. | 4th Sep 1917 | Morton \ M8 img035 | |
| Directive from Mr. Royce to arrange for the testing of engines on coal gas for production work. | 7th Sep 1917 | Morton \ M8 img036 | |
| Successful use of stamped crankshafts over ordinary forged ones and recommending their adoption. | 1st Nov 1917 | Morton \ M8 img037 | |
| Value of aeroplane gearing, engine efficiency, and propeller safety at high speeds. | 10th Dec 1917 | Morton \ M8 img038 | |
| Letter from F.H. Royce regarding the policy on body weights for the 20 HP and Goshawk chassis, with criticism of coachbuilding practices. | 2nd May 1923 | Morton \ M9 img001 | |
| Urging a change in development priorities for aero engines and expressing frustration with the slow pace of progress. | 26th Aug 1925 | Morton \ M9 img002 | |
| Standardisation sheet for a design alteration to flap-type bonnet ventilator shutter pivots. | 14th Jul 1931 | Morton \ M9 img003 | |
| Specifications for a proposed harmonic damper, including its polar moment of inertia and natural frequency. | 21th Aug 1931 | Morton \ M9 img004 | |
| Calculations for a harmonic damper. | 28th Aug 1931 | Morton \ M9 img005 | |
| Testing of balanced crankshafts and the production implications for the 25 HP and Phantom models. | 21th Aug 1931 | Morton \ M9 img006 | |
| Examination and road test of a 27 HP Buick 8-cylinder engine. | 4th Sep 1931 | Morton \ M9 img007 | |
| Testing Chrysler balance weights on a 25 HP engine to eliminate flywheel vibration. | 21th Sep 1931 | Morton \ M9 img008 | |
| Bench tests for improved performance of the 25 HP engine. | 5th Aug 1931 | Morton \ M9 img009 | |
| Vehicle performance testing, detailing modifications to the propeller shaft and exhaust, and analysing lap speeds. | 5th Aug 1931 | Morton \ M9 img010 | |
| Blueprint graph of engine performance tests from Brooklands showing BHP and MEP against RPM. | 1st Aug 1931 | Morton \ M9 img011 | |
| Performance comparison graph of different exhaust systems against engine RPM. | 11th Aug 1931 | Morton \ M9 img012 | |
| Performance data from a Brooklands test comparing different car configurations and components. | 14th Aug 1931 | Morton \ M9 img013 | |
| Technical memorandum discussing proposals for increasing the performance of the 25 HP car. | 5th Aug 1931 | Morton \ M9 img014 | |
| Treatment of rivetless bonnets and concealed hinges, comparing manufacturing methods with other car makers. | 22th Jun 1931 | Morton \ M9 img015 | |
| Schemes to overcome rear brake groans and squeaks. | 9th Jun 1931 | Morton \ M9 img016 | |
| Brooklands test results comparing acceleration and maximum speed for three different car configurations. | 23th Jun 1931 | Morton \ M9 img017 | |
| Performance comparison report of various car configurations, focusing on speed and acceleration. | 23th Jun 1931 | Morton \ M9 img018 | |
| Performance comparison and analysis of a closed 8-cylinder Buick, noting its engine, weight, and handling characteristics. | 23th Jun 1931 | Morton \ M9 img019 | |
| Graph from Brooklands tests comparing horsepower, RPM, and road speed for different engine configurations. | 19th Jun 1931 | Morton \ M9 img020 | |
| Performance graph from Brooklands tests comparing Clutch HP and B.M.E.P. for two different vehicle configurations. | 19th Jun 1931 | Morton \ M9 img021 | |
| Graph plotting Brake Horsepower and Brake Mean Effective Pressure against engine RPM from Brooklands tests. | 19th Jun 1931 | Morton \ M9 img022 | |
| Tests on R. engine timing and camshafts, including diagrams comparing different timing settings. | 24th Jun 1931 | Morton \ M9 img023 | |
| Camshaft alterations and their effects on engine performance, including M.E.P. and valve timing. | 24th Jun 1931 | Morton \ M9 img024 | |
| Experiments on carburetter positioning to determine the best all-round arrangement for a car engine. | 11th Jul 1931 | Morton \ M9 img025 | |
| Analysis of different carburetter arrangements and types, including Claudel and Zenith models. | 11th Jul 1931 | Morton \ M9 img026 | |
| Continued report on the characteristics and performance of S.U. carburettors. | 11th Jul 1931 | Morton \ M9 img027 | |
| Performance graph comparing various carburetor arrangements for a PII engine with an aluminum head. | 10th Jul 1931 | Morton \ M9 img028 | |
| Performance chart comparing different carburettor arrangements for a 25 HP engine. | 10th Jul 1931 | Morton \ M9 img029 | |
| Alternative designs and materials, particularly aluminium versus steel, for rivetless bonnets. | 15th Jul 1931 | Morton \ M9 img030 | |
| Summary of quarterly complaints and investigations into various brake-related issues. | 28th Jul 1931 | Morton \ M9 img031 | |
| Report page detailing issues and modifications for shock absorbers, springing, fabric couplings, steering, and exhaust systems. | 28th Jul 1931 | Morton \ M9 img032 | |
| Modifications and resolutions for recurring vehicle complaints. | 28th Jul 1931 | Morton \ M9 img033 | |
| List of resolved issues and ongoing improvements for various vehicle components. | 28th Jul 1931 | Morton \ M9 img034 | |
| Report page detailing resolutions for a list of numbered customer complaints and component failures. | 28th Jul 1931 | Morton \ M9 img035 | |
| List of reported complaints and their corresponding resolutions for items 26 through 32. | 28th Jul 1931 | Morton \ M9 img036 | |
| Tests for a water pump fabric drive and a fix for engine water leaks from cylinders. | 4th Aug 1931 | Morton \ M9 img037 | |
| Proposed wind tunnel experiments to reduce the windage of streamlined car bodies. | 4th Aug 1931 | Morton \ M9 img038 | |
| Alternative car body shapes for aerodynamic testing and referencing recent American studies. | 4th Aug 1931 | Morton \ M9 img039 | |
| Investigation into three recorded failures of the low inertia damper spring plate. | 24th Aug 1931 | Morton \ M9 img040 | |
| Summary of a 1926 analysis comparing the fatty oil composition of Price's and Wakefield's lubricating oils. | 24th Aug 1931 | Morton \ M9 img041 | |
| The chemical analysis of two oil samples, 'A' and 'B'. | 22th Feb 1926 | Morton \ M9 img042 | |
| Report comparing the viscosity and asphaltic bodies of two oil samples, 'A' and 'B', after a heat test. | 24th Aug 1931 | Morton \ M9 img043 | |
| Design rationale, conclusions from testing, and future plans for the auto friction damper on the 40/50 model. | 24th Aug 1931 | Morton \ M9 img044 | |
| Complaints of cracked exhaust manifolds on Phantom I & 20 HP models, proposing to test modified replacements on customer cars. | 22th Jul 1931 | Morton \ M9 img045 | |
| Quarterly complaints of cracked exhaust manifolds on Phantom I & P.2 models. | 28th Jul 1931 | Morton \ M9 img046 | |
| The dispatch of various experimental exhaust manifolds for Phantom I and 20 HP models for testing. | 4th Sep 1931 | Morton \ M9 img047 | |
| Request for information and monthly reports on the performance of experimental modified exhaust manifolds for P.1. and 20 HP cars. | 2nd Oct 1931 | Morton \ M9 img048 | |
| Power output difference between balanced and unbalanced twin carburettors. | 2nd Oct 1931 | Morton \ M9 img049 | |
| Graph comparing the power output of balanced and unbalanced twin carburettor configurations. | 2nd Oct 1931 | Morton \ M9 img050 | |
| Power output difference between balanced and unbalanced twin carburetters. | 2nd Oct 1931 | Morton \ M9 img051 | |
| Bringing the battery ignition system up to date with an attached list of recommendations. | 14th Oct 1931 | Morton \ M9 img052 | |
| List of advantages for an outside primary coil, a reduced capacity condenser, and a lighter contact breaker lever. | 15th Oct 1931 | Morton \ M9 img053 | |
| List of potential improvements for ignition system components. | 15th Oct 1931 | Morton \ M9 img054 | |
| The Delco-Remy vacuum-operated automatic ignition advance system. | 15th Oct 1931 | Morton \ M9 img055 | |
| Road test report on 1931 cars, specifically the Chrysler 6 Cylinder and the Morris Isis. | 27th Oct 1931 | Morton \ M9 img056 | |
| Performance comparison and critique of a 20 HP Wizard car against a standard 25 HP model. | 30th Oct 1931 | Morton \ M9 img057 | |
| Vehicle accessories including dash boards, double batteries for starting, and various headlamp technologies and controls. | 30th Oct 1931 | Morton \ M9 img058 | |
| Trends in automotive electrical equipment observed at the Olympia Motor Show, covering ignition systems, dynamos, and horns. | 30th Oct 1931 | Morton \ M9 img059 | |
| Automotive features including instrument boards, batteries, headlamps, and other accessories. | 30th Oct 1931 | Morton \ M9 img060 | |
| Interesting features, specifically the engine mounting on a Chrysler Plymouth, from the 1931 Motor Show. | 31th Oct 1931 | Morton \ M9 img061 | |
| Gearbox and steering technologies, including synchromesh and flexible shackles, with competitor analysis. | 31th Oct 1931 | Morton \ M9 img062 | |
| Report comparing competitors' flexible shackles, cooling systems, radiator designs, and frame construction. | 31th Oct 1931 | Morton \ M9 img063 | |
| Frame design, radiator mounting, and a detailed analysis of brake drum construction and materials. | 31th Oct 1931 | Morton \ M9 img064 | |
| Brake drum material composition, alternative suppliers, and the increasing use of hydraulic brakes and shock dampers. | 31th Oct 1931 | Morton \ M9 img065 | |
| Page discussing ignition and induction systems, including a diagram of an induction pipe layout. | 31th Oct 1931 | Morton \ M9 img066 | |
| Brief run and test report on a Hillman Wizard '75' car. | 31th Oct 1931 | Morton \ M9 img067 | |
| Road test report comparing the performance of a Wizard 75 with a 25HP model on various test hills. | 31th Oct 1931 | Morton \ M9 img068 | |
| Performance comparison between the 20/25 HP car and the Hillman Wizard, considering the impact of chassis and body weights. | 31th Oct 1931 | Morton \ M9 img069 | |
| Copied letter from Cadillac Motor Car Company detailing information on propeller shaft assemblies. | 21th Oct 1931 | Morton \ M9 img070 | |
| Shaft balance specifications and tube thickness recommendations for the Phantom II shaft. | 21th Oct 1931 | Morton \ M9 img071 | |
| Blueprint diagram of a Plymouth engine front and rear mounting system. | 21th Oct 1931 | Morton \ M9 img072 | |
| Diagrams of flexible shackle designs used on various car makes. | 21th Oct 1931 | Morton \ M9 img073 | |
| Suggested scheme of windings for an outside primary ignition coil design. | 19th Oct 1931 | Morton \ M9 img074 | |
| Letter from Mechanics Universal Joint Company discussing a formula for critical speeds of drive shaft tubes. | 19th Oct 1931 | Morton \ M9 img075 | |
| Performance and measurement of friction torsional vibration dampers. | 7th Nov 1931 | Morton \ M9 img076 | |
| Viability of purchasing and modifying a small Fiat car for the Peregrine class. | 13th Nov 1931 | Morton \ M9 img077 | |
| Review of a 2.5 Litre Fiat Saloon, covering its specifications, performance, and handling characteristics. | 13th Nov 1931 | Morton \ M9 img078 | |
| Road test report and comparison of a car against competitors like the Wizard, Fiat, and Chrysler. | 13th Nov 1931 | Morton \ M9 img079 | |
| Design and limitations of the Diamond engine mounting system. | 16th Nov 1931 | Morton \ M9 img080 | |
| Test results on the average rate of oil displacement in self-adjustable hydraulic shock absorbers. | 9th Nov 1931 | Morton \ M9 img081 | |
| The movement of shock damper levers, comparing pumping action at various speeds. | 9th Nov 1931 | Morton \ M9 img082 | |
| Test data for various rear damper specifications at different speeds on two road surfaces. | 21th Nov 1931 | Morton \ M9 img083 | |
| Comparing clutch spring loads, leverages and pedal pressures between the 25 HP and 40/50 HP models. | 21th Nov 1931 | Morton \ M9 img084 | |
| Fitting a Bosch dynamo and comparing the third brush machine with a voltage control generator. | 23th Nov 1931 | Morton \ M9 img085 | |
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