| Description | Date | Identifier | |
| Whether to design a cylinder with a solid crown or a plug for testing purposes. | 1st May 1919 | Morton \ M3.6 img014 | |
| Solutions for cooling the floor boards by ventilating the scuttle dash. | 6th Jun 1919 | Morton \ M3.6 img015 | |
| Case for fitting louvres or shutters to radiators to control engine temperature. | 20th May 1919 | Morton \ M3.6 img016 | |
| Use of radiator louvres and thermometers for controlling engine water temperature. | 1st Jun 1919 | Morton \ M3.6 img017 | |
| Value of bonnet air shutters and the design of the bonnet handle mechanism. | 4th Jun 1919 | Morton \ M3.6 img018 | |
| Suggestion to simplify the priming system on a 40/50 HP chassis by removing a redundant spring from the induction pipe cock. | 26th Jun 1919 | Morton \ M3.6 img019 | |
| Arguing for the adoption of a satisfactory aluminium piston design for repair engines. | 9th Jun 1919 | Morton \ M3.6 img020 | |
| Mr. Royce's wish for front axle swivel pins to be made with a taper instead of a parallel fit. | 9th Jun 1919 | Morton \ M3.6 img021 | |
| Use of the vehicle frame for the electrical return path (earthing) versus a fully insulated two-wire system. | 9th Jun 1919 | Morton \ M3.6 img022 | |
| Vulnerability of electrical connections to seawater and advocating for a double wiring system. | 9th Jun 1919 | Morton \ M3.6 img023 | |
| Advantages of using smaller tyres on the front wheels of a 40/50 HP Chassis. | 11th Jun 1919 | Morton \ M3.6 img024 | |
| Re-design of the re-distributing board for 40/50 HP cars, moving to a single fuse system. | 16th Sep 1919 | Morton \ M3.6 img025 | |
| Page describing insulation testing and the results of accidental earth faults in electrical circuits. | 1st Jun 1919 | Morton \ M3.6 img026 | |
| Mr. Royce's decision on the design of rear shock dampers for the 40/50 HP chassis. | 18th Jun 1919 | Morton \ M3.6 img027 | |
| Experiments on a new 40/50 HP trial chassis, focusing on the positioning of springs and shock absorbers. | 3rd Jul 1919 | Morton \ M3.6 img028 | |
| Expansion of pistons and the potential risks of tight pistons in multi-cylinder engines. | 8th Jul 1919 | Morton \ M3.6 img029 | |
| Exchange of car 1X for car 7 CA for the purpose of gaining experience. | 1st Jul 1919 | Morton \ M3.6 img030 | |
| Safety interlock for the electric starter to prevent operation unless the vehicle is in neutral. | 1st Jul 1919 | Morton \ M3.6 img031 | |
| Methods for controlling engine water temperature, comparing bye-pass and louvred systems. | 28th Jul 1919 | Morton \ M3.6 img032 | |
| Suggesting primers be fitted to existing 40/50 HP chassis to improve ease of starting. | 28th Jul 1919 | Morton \ M3.6 img033 | |
| Recurring breakages of gauze petrol filters on 40/50 chassis, recommending biennial replacement and a more accessible design. | 22th Jul 1919 | Morton \ M3.6 img034 | |
| The preliminary tests of new type shock absorbers, comparing them against the original plates with data on movement and friction. | 23th Jul 1919 | Morton \ M3.6 img035 | |
| Design flaw in new shock absorbers that causes mud collection, with a recommendation for modification. | 25th Jul 1919 | Morton \ M3.6 img036 | |
| Fitting of new rear shock absorbers on car 49-GB. | 5th Jun 1919 | Morton \ M3.6 img037 | |
| Delivery timeline for a new car and suggesting the installation of large ventilators to resolve hot floorboards. | 5th Jun 1919 | Morton \ M3.6 img038 | |
| Evaluation of radiator shutters and bonnet improvements for the 40/50 chassis. | 5th Jun 1919 | Morton \ M3.6 img039 | |
| Recommendation for an alteration regarding the engagement of spring clips. | 1st Jun 1919 | Morton \ M3.6 img040 | |
| Material and design of a radiator blanking-off piece, comparing aluminium to 3-ply wood. | 5th Jun 1919 | Morton \ M3.6 img041 | |
| Mileage of short connecting rods fitted to chassis 49-CB and I.E.X. | 7th Jun 1919 | Morton \ M3.6 img042 | |
| Hard spots found on aluminium pistons for the 40/50 ATW chassis, recommending clearance around the gudgeon pin hole. | 21th Jun 1919 | Morton \ M3.6 img043 | |
| Fitting and testing a cooling system bye-pass pipe for a 40/50 chassis. | 10th Jun 1919 | Morton \ M3.6 img044 | |
| Radiator temperature control, preventing freezing, and the effectiveness of a blind and thermometer on model 49-GB. | 10th Jun 1919 | Morton \ M3.6 img045 | |
| Testing and negative assessment of 'Rapid' Jacks proposed by Mr. Lionel Rapson. | 27th Jun 1919 | Morton \ M3.6 img046 | |
| Report evaluating the shortcomings of a permanently fixed car jack system, focusing on its weight, locking mechanism, and safety. | 27th Jun 1919 | Morton \ M3.6 img047 | |
| Continued discussion comparing different types of car jacks and recommending modifications for axle pads. | 27th Jun 1919 | Morton \ M3.6 img048 | |
| Letter discussing the supply and safety benefits of integrating four Rapson Jacks into a car chassis. | 14th Jun 1919 | Morton \ M3.6 img049 | |
| Letter from F. Lionel Rapson discussing the standardization of a jack and related advertising. | 16th Apr 1919 | Morton \ M3.6 img050 | |
| Specification and pricing details for 'Rapson' Jacks, including a proposal for standardization. | 16th Apr 1919 | Morton \ M3.6 img051 | |
| Effects of fitting new shock absorbers and moving the rear springs from below to above the axle. | 27th Jun 1919 | Morton \ M3.7 img001 | |
| Road tests measuring rear wheel revolutions under different speeds and tyre pressures to analyze springing. | 27th Jun 1919 | Morton \ M3.7 img002 | |
| Comparison of rear springs positioned above and below the axle. | 27th Jun 1919 | Morton \ M3.7 img003 | |
| Road test of new type shock absorbers and comparing them to the Trauffault model. | 27th Jun 1919 | Morton \ M3.7 img004 | |
| Hand-drawn sketch showing a stepped profile with dimensional measurements. | 27th Jun 1919 | Morton \ M3.7 img005 | |
| Report comparing the expansion and required clearances for aluminium and cast iron pistons, including a diagram. | 27th Jun 1919 | Morton \ M3.7 img006 | |
| Data sheet detailing heat expansion test results for various cast iron and aluminium pistons at different temperatures. | 27th Jun 1919 | Morton \ M3.7 img007 | |
| Proposal for a radiator bypass system to improve engine warm-up times and prevent piston knock during city driving. | 22th Jul 1919 | Morton \ M3.7 img008 | |
| Suggestion to fit primers to existing pre-electric cars to assist with hand-starting on the 40/50 Chassis. | 22th Jul 1919 | Morton \ M3.7 img009 | |
| Dynamo drive belt slipping and noise issues from E.575 dynamos. | 1st Aug 1919 | Morton \ M3.7 img010 | |
| Investigation into dynamo noise, detailing a change in bearing supplier from Skeffko to Hoffmann following a failure. | 1st Aug 1919 | Morton \ M3.7 img011 | |
| Diagnosing engine knocking and popping in car 7-CA, caused by a rotted petrol filter and pre-ignition. | 12th Aug 1919 | Morton \ M3.7 img012 | |
| Engine knocking complaint, diagnosing the cause as tight pistons and incorrect sparking plugs. | 12th Aug 1919 | Morton \ M3.7 img013 | |
| 40/50 chassis bumping test, detailing the test rig setup, modifications, and comparison with pre-war results. | 18th Aug 1919 | Morton \ M3.7 img014 | |
| Engine knocking issues with aluminium pistons on standard cars when the engine is cold. | 18th Aug 1919 | Morton \ M3.7 img015 | |
| Piston knock standards, clearances for aluminium pistons, and the associated risk of seizure. | 22th Aug 1919 | Morton \ M3.7 img016 | |
| The policy on aluminium pistons and managing customer expectations regarding piston knock. | 20th Mar 1926 | Morton \ M3.7 img017 | |
| Piston knock issues in car 49-GB, discussing fitting new pistons and the risk of seizing. | 20th Apr 1928 | Morton \ M3.7 img018 | |
| The reduction of piston knocks by adjusting ignition timing. | 25th Aug 1919 | Morton \ M3.7 img019 | |
| The design and required modifications for an improved clutch brake for the 40/50 chassis. | 26th Aug 1919 | Morton \ M3.7 img020 | |
| Design of the standard oil pumps, their 20° obliquity gears, and the absence of noise complaints. | 29th Aug 1919 | Morton \ M3.7 img021 | |
| Note on a brake test for car 1482, detailing the total weight held on a 1 in 4 gradient. | 3rd Jan 1911 | Morton \ M4.1 img001 | |
| Modification to shorten rear brake liners to prevent them from catching. | 6th Dec 1911 | Morton \ M4.1 img002 | |
| Short typed note regarding the fitting of extra rivets. | 26th Jan 1921 | Morton \ M4.1 img003 | |
| Comparison of 'Marmon' steering with the company's own, detailing issues with non-centre point steering. | 26th Jan 1921 | Morton \ M4.1 img004 | |
| Continued memo from R. to HS, EP & OY discussing principles for achieving perfect steering. | 1st Jan 1921 | Morton \ M4.1 img005 | |
| Marmon Car, detailing its engine power, compression, gear ratios, and fuel consumption compared to a standard model. | 1st Feb 1921 | Morton \ M4.1 img006 | |
| Performance and specification data for a Marrion Car, including weight, gear ratios, fuel consumption, and test results. | 16th Dec 1920 | Morton \ M4.1 img007 | |
| Vehicle performance characteristics including braking, engine timing, suspension, and steering. | 16th Dec 1920 | Morton \ M4.1 img008 | |
| Specifications for steering, transmission, inlet valves, springs, and chassis frame. | 4th Apr 1922 | Morton \ M4.1 img009 | |
| Recommendation to perform a dynamometer curve test on an Essex car's chassis before disposal. | 4th Apr 1922 | Morton \ M4.1 img010 | |
| Performance and specification data for an Essex Car. | 19th Jan 1922 | Morton \ M4.1 img011 | |
| Specifications and test results for an Essex Car, continued from a previous page. | 19th Jul 1917 | Morton \ M4.1 img012 | |
| List of specifications and a sketch of a brake lever mechanism for an Essex Car. | 4th Jan 1921 | Morton \ M4.1 img013 | |
| Comparing the driving experience of American cars to the Napier, focusing on comfort and gear controls. | 10th Feb 1921 | Morton \ M4.1 img014 | |
| Specification and performance data for a 15.9 Horse Power Humber Car. | 12th Mar 1921 | Morton \ M4.1 img015 | |
| Performance and specification report covering clutch, brakes, engine, and suspension. | 10th Dec 1920 | Morton \ M4.1 img016 | |
| Engineering notes and critique on the steering, suspension, and drivetrain of a Humber Car. | 10th Dec 1920 | Morton \ M4.1 img017 | |
| Data table for Humber Car valve contours, listing inlet and exhaust cam lift at various degrees of rotation. | 10th Dec 1920 | Morton \ M4.1 img018 | |
| Hill climb performance data for a Humber Car loaded with the equivalent of four passengers. | 10th Dec 1930 | Morton \ M4.1 img019 | |
| Starter gear failure on a Marmon car, comparing its Bendix pinion spring drive with others. | 17th Mar 1921 | Morton \ M4.1 img020 | |
| Blueprint for a lengthened Goshawk 11 dumb iron, with a comparison to a 10-15 HP Fiat part. | 11th Apr 1922 | Morton \ M4.1 img021 | |
| Sale of four American cars and a request for their cost price. | 14th Jan 1921 | Morton \ M4.1 img022 | |
| Disposal and pricing of American cars in stock. | 24th May 1921 | Morton \ M4.1 img023 | |
| Prices and conditions of second-hand American cars for sale. | 26th Jan 1921 | Morton \ M4.1 img024 | |
| Letter from International Distributors Ltd. to a client regarding a scale drawing of a 7-passenger limousine. | 30th Oct 1935 | Morton \ M4.1 img025 | |
| Letter to W. Turner Smith discussing the Hupmobile and a potential exchange of rides with a Phantom III. | 11th Nov 1935 | Morton \ M4.1 img026 | |
| Specifications of a Buick car. | 5th May 1919 | Morton \ M4.1 img027 | |
| Engine performance data sheet detailing horsepower, valve timing, and valve contour measurements. | 5th May 1919 | Morton \ M4.1 img028 | |
| Impressions from short test drives of competitor cars at the Olympia Show. | 11th Nov 1920 | Morton \ M4.1 img029 | |
| Road test report comparing competitor vehicles, including a Lanchester. | 11th Nov 1920 | Morton \ M4.1 img030 | |
| Comparative review of a Packard car, detailing its performance against a Rolls-Royce. | 11th Nov 1920 | Morton \ M4.1 img031 | |
| Performance data of a Hispano servo unit. | 1st Mar 1924 | Morton \ M4.1 img032 | |
| Servo efficiency, temperature effects, and the calculation of the coefficient of friction for servo shoes. | 12th Jul 1923 | Morton \ M4.1 img033 | |
| Hispano Car detailing issues with the clutch, seized pistons, and piston knock. | 16th Jan 1924 | Morton \ M4.1 img034 | |
| The steering geometry and measurements for a Hispano vehicle. | 7th Feb 1924 | Morton \ M4.1 img035 | |
| The specifications of Hispano front springs. | 12th Jul 1923 | Morton \ M4.1 img036 | |
| Test results for a Hispano engine. | 11th Mar 1924 | Morton \ M4.1 img037 | |
| Comparing the specifications and power output of Hispano and E.A.C. engines. | 11th Mar 1924 | Morton \ M4.1 img038 | |
| Engine distribution, valve temperature, and the effect of dual ignition on a Hispano engine. | 11th Mar 1924 | Morton \ M4.1 img039 | |
| Hispano engine indicator tests. | 12th Jul 1923 | Morton \ M4.1 img040 | |
| Continued discussion on the performance of an indicator valve for detecting detonation and measuring efficiency. | 12th Jul 1923 | Morton \ M4.1 img041 | |
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