| Description | Date | Identifier | |
| The arrangement for Messrs. Smith to produce a switchbox sample. | 24th Jul 1920 | Morton \ M22 img115 | |
| Telegraphed confirmation regarding difficulties with a 12-volt earth scheme and suggestions for alternative electrical wiring. | 26th Jul 1920 | Morton \ M22 img116 | |
| Choice of Admiralty or battleship grey paint for car 6 EX. | 2nd Aug 1920 | Morton \ M22 img117 | |
| New instrument board design for the 6 EX model, detailing three novelties to meet Sales and American requirements. | 3rd Sep 1920 | Morton \ M22 img118 | |
| Electrical installation errors found on a car (model 6 EX) and the subsequent provision of complete diagrams to prevent recurrence. | 1st Sep 1920 | Morton \ M22 img119 | |
| Requesting a comparison between the experimental 'Hawk' Northcliffe chassis and a production model to evaluate proposed modifications. | 8th Sep 1920 | Morton \ M22 img120 | |
| Design specifications for a car body, windscreen, scuttle, and instrument panel. | 4th Sep 1920 | Morton \ M22 img121 | |
| Query regarding the dimensions and positioning of side levers on various car chassis. | 25th Sep 1920 | Morton \ M22 img122 | |
| With a diagram regarding a required alteration to the brake lever dimension on drawing Lec.1280. | 1st Sep 1920 | Morton \ M22 img123 | |
| Petrol consumption for the 40/50 chassis, detailing modifications to achieve 35-37 MPG. | 30th Sep 1920 | Morton \ M22 img124 | |
| Methods for achieving and measuring excellent petrol consumption. | 30th Sep 1920 | Morton \ M22 img125 | |
| Improving car performance, focusing on petrol consumption and speed to manage sales perceptions against competitors. | 30th Sep 1920 | Morton \ M22 img126 | |
| Visit to West Wittering regarding the experimental Goshawk engine, detailing issues with cylinder jackets and inlet water pipes. | 5th Oct 1920 | Morton \ M22 img127 | |
| Notes on camshaft drive, valve gear, sparking plug positions, fuel consumption on a 40/50 HP chassis, and an engine thud. | 8th Oct 1920 | Morton \ M22 img128 | |
| Crankshaft bearing issue, steering wobble, improvements for rear shock dampers, and proposed back axle ratios based on vehicle weight. | 8th Oct 1920 | Morton \ M22 img129 | |
| Design decisions for components like axles, gearboxes, and magnetos, particularly for the Buzzard model. | 8th Oct 1920 | Morton \ M22 img130 | |
| Decisions regarding impulse starters for armoured cars and the design of a tyre air pump. | 8th Oct 1920 | Morton \ M22 img131 | |
| Proposed hand starter mechanism involving a pinion and flywheel gear for an engine. | 8th Oct 1920 | Morton \ M22 img132 | |
| Extract discussing fuel consumption of a 40/50 HP chassis, following a visit by Messrs. Hives & Day to West Wittering. | 5th Oct 1920 | Morton \ M22 img133 | |
| Tests on petrol consumption for the 40/50 chassis, including road tests and mixture adjustments. | 28th Oct 1920 | Morton \ M22 img134 | |
| Test report analysing fuel consumption and mechanical efficiency under various engine load and ignition settings. | 28th Oct 1920 | Morton \ M22 img135 | |
| Fuel consumption (M.P.G.) tests under various driving conditions to determine optimal economy. | 28th Oct 1920 | Morton \ M22 img136 | |
| Continued note on reducing transmission losses and improving fuel efficiency with thin oil. | 28th Oct 1920 | Morton \ M22 img137 | |
| The progress of body frame fitting on the 6.EX car and a list of new parts to be installed. | 13th Nov 1920 | Morton \ M22 img138 | |
| Problems with a petrol level indicator on the 4.EX Car, including inaccurate readings and petrol leaks. | 10th Feb 1921 | Morton \ M22 img139 | |
| 6-EX car received from coachbuilders, detailing the fix for a faulty petrol level indicator and outstanding work. | 2nd Feb 1921 | Morton \ M22 img140 | |
| Starting and slow running device issue on a 40/50 HP chassis, specifically an explosion behind the throttle. | 8th Jun 1921 | Morton \ M22 img141 | |
| Standard throttle modification on the 40/50 chassis, specifically the blocking of a hole. | 8th Jun 1921 | Morton \ M22 img142 | |
| Memo discussing design problems and defending a designer referred to as 'DA' against another named 'E'. | 13th Jan 1922 | Morton \ M22 img143 | |
| Movement of the 6.EX car and clarification on design perfection priorities. | 13th Jan 1922 | Morton \ M22 img144 | |
| Logistics and modifications for the 6 EX experimental car. | 13th Jan 1922 | Morton \ M22 img145 | |
| Proposal to modify car 6.EX with fittings for low-grade petrol and test a Goshawk type battery ignition in France. | 16th Jan 1922 | Morton \ M22 img146 | |
| Preference for black upholstery and the method for mixing grey paint. | 19th Jul 1922 | Morton \ M22 img147 | |
| Mr. Royce's specifications for chassis 6EX, including suspension, paint, and upholstery. | 19th Jul 1922 | Morton \ M22 img148 | |
| Feasibility of using Goshawk electrical equipment on the 40/50 chassis. | 1st Aug 1922 | Morton \ M22 img149 | |
| Modifying the ignition switch box and wiring for the 40/50 model, including feedback from Springfield. | 1st Aug 1922 | Morton \ M22 img150 | |
| Advantages and feasibility of adapting Goshawk electrical equipment for the 40/50 model. | 1st Aug 1922 | Morton \ M22 img151 | |
| The suitability of Goshawk-type front and rear shock absorbers for the 40/50 HP model. | 14th Sep 1922 | Morton \ M22 img152 | |
| Post-accident repairs and the proposed fitting of new electrical components for the 6.EX car. | 14th Sep 1922 | Morton \ M22 img153 | |
| Communication detailing car body finishing timelines and paint samples. | 22th Sep 1922 | Morton \ M22 img154 | |
| Improvements to the 40/50 chassis by fitting Goshawk electrical equipment and a vacuum fuel feed system. | 22th Sep 1922 | Morton \ M22 img155 | |
| The instrument board, ignition switch modifications, and a larger generator for the 40/50 model. | 21th Sep 1922 | Morton \ M22 img156 | |
| Paint colour options for car models 6.EX and No.4.Goshawk. | 21th Sep 1922 | Morton \ M22 img157 | |
| Avoidance of a vapouriser scheme in favour of a modified induction pipe for 6.EX and other 40/50s models. | 10th Oct 1922 | Morton \ M22 img158 | |
| The pros and cons of the vaporiser scheme for the 40/50 chassis, specifically relating to the boiler and exhaust heated throttle. | 15th Oct 1922 | Morton \ M22 img159 | |
| Analysis of the limitations of the exhaust heated throttle and a comparison with a vapouriser scheme. | 10th Oct 1922 | Morton \ M22 img160 | |
| Experiments with induction pipes to improve fuel distribution and prevent engine misfiring. | 10th Oct 1922 | Morton \ M22 img161 | |
| Tests and modifications to a boiler and vaporiser system to resolve cold starting and fuel mixture issues. | 10th Oct 1922 | Morton \ M22 img162 | |
| Recommendation based on road tests of an exhaust heated throttle and its effect on the vapouriser scheme. | 10th Nov 1922 | Morton \ M22 img163 | |
| Proposed new positioning of the central control levers. | 10th Nov 1922 | Morton \ M22 img164 | |
| Observations on a Goshawk chassis, comparison to a Renault, and modifications to car 6.EX using Goshawk electrical equipment. | 10th Nov 1922 | Morton \ M22 img165 | |
| List of modifications for the 6.EX. car, detailing the parts and their origin. | 10th Nov 1922 | Morton \ M22 img166 | |
| List of parts and modifications fitted to the 6.EX experimental car for testing and critique. | 10th Nov 1922 | Morton \ M22 img167 | |
| List of fitted parts and modifications to a vehicle, including the Barker arrangement and Ferodo threading. | 14th Nov 1922 | Morton \ M22 img168 | |
| From RS to HS regarding standardisation sheets for various parts, noting Mr. Royce's rejection of a vaporiser scheme. | 14th Nov 1922 | Morton \ M22 img169 | |
| Mr. Royce's feedback on the Goshawk steering wheel rim for the 6.EX model and a proposal for a new 18-inch wheel design. | 14th Nov 1922 | Morton \ M22 img170 | |
| Explaining the inability to work on left-hand controls for the Goshawk due to being overloaded with other projects. | 16th Nov 1922 | Morton \ M22 img171 | |
| Test drive of the 6.EX Goshawk 40/50 model, discussing performance, body suitability, and fuel economy. | 1st Dec 1922 | Morton \ M22 img172 | |
| Alterations to the throttle closing spring mechanism for chassis 6.EX based on Mr. Royce's wishes. | 16th Dec 1922 | Morton \ M22 img173 | |
| Exhaust valve seat angles, burning issues, and the effects of valve clearances on engine performance. | 27th Dec 1922 | Morton \ M22 img174 | |
| Burnt valves, discussing potential causes such as pre-ignition from spark plugs and engine performance characteristics. | 29th Dec 1922 | Morton \ M22 img175 | |
| The merits of pinning piston rings, comparing American and 40/50 practice. | 11th Aug 1920 | Morton \ M22 img176 | |
| Reducing engine torque reaction vibration on the 40/50 HP chassis. | 1st Oct 1923 | Morton \ M22 img177 | |
| From 'E' to 'Hs' regarding a request from Mr. Royce for distance tubes to conduct a rigid feet experiment on a 40/50 model. | 27th Sep 1923 | Morton \ M22 img178 | |
| Chasing the dispatch of parts for a rigid front feet experiment on the 6.EX car. | 29th Sep 1923 | Morton \ M22 img179 | |
| Analysing tractive and wind resistance at high speeds to predict the increase in speed from a power increase. | 1st Feb 1924 | Morton \ M22 img180 | |
| Comparison of the springing and ride quality between car models 1 EX and 6 EX. | 23th Aug 1920 | Morton \ M22 img181 | |
| Comparison of fuel consumption and engine performance between experimental cars 1 EX and 6 EX with different back axle gear ratios. | 23th Aug 1920 | Morton \ M22 img182 | |
| Report comparing the steering systems and road behaviour of experimental cars 1 EX and 6 EX. | 20th Aug 1920 | Morton \ M22 img183 | |
| Comparing the performance of a 1 EX starter with a 6 EX starter, noting noise issues and suggesting improvements. | 24th Aug 1920 | Morton \ M22 img184 | |
| Comparison of ignition systems in cars 1 EX and 6 EX, noting performance and petrol consumption. | 24th Aug 1920 | Morton \ M22 img185 | |
| Complaint regarding falling standards and various defects on chassis 6 EX compared to 1 EX. | 25th Aug 1920 | Morton \ M22 img186 | |
| Fault with a car's priming cock making it difficult to pressurize the petrol tank. | 1st Aug 1920 | Morton \ M22 img187 | |
| Deteriorating workmanship quality, low engine compression, and dynamo belt tension issues on chassis 6 EX. | 30th Aug 1920 | Morton \ M22 img188 | |
| Issues with a dynamo suspension clip and a knock in the transmission. | 1st Aug 1920 | Morton \ M22 img189 | |
| Drivetrain phenomena like knocks and backlash, and potential improvements involving torque tubes and couplings. | 30th Aug 1920 | Morton \ M22 img190 | |
| Log of dates and notes concerning various vehicle models and prototypes from 1922-1923. | 30th Aug 1920 | Morton \ M22 img191 | |
| List of new and proposed car and engine models with brief technical specifications. | 4th Jul 1922 | Morton \ M22 img192 | |
| Query from Mr. Royce regarding an experiment on the effect of radius rods on the steering movement of the new 40/50 car over rough roads. | 4th Jul 1922 | Morton \ M22 img193 | |
| Frame modifications for the 40/50 export model to accommodate various upgrades. | 19th Aug 1922 | Morton \ M22 img194 | |
| Extract regarding the immediate assembly of parts for experimental export chassis 1 and 2. | 25th Aug 1922 | Morton \ M22 img195 | |
| New front axle design with front wheel brakes, comparing it to the Hotchkiss patent. | 28th Aug 1922 | Morton \ M22 img196 | |
| Investigating the possible causes of knocking gears in an engine's camshaft drive. | 15th Sep 1922 | Morton \ M22 img197 | |
| Methods to test and mitigate engine crankshaft speed irregularities. | 9th Sep 1922 | Morton \ M22 img198 | |
| Strategy for introducing improvements to the 40/50 model, specifically the 'Curlew' prototype. | 9th Sep 1922 | Morton \ M22 img199 | |
| Continued letter discussing the need for speed and standardisation between the Drawing Offices and the Works. | 9th Sep 1922 | Morton \ M22 img200 | |
| Production strategy for implementing improvements to the 40/50 model, specifically the 'Curlew' version. | 9th Sep 1922 | Morton \ M22 img201 | |
| Design of the dumb iron and front shackle for the front springs on several models. | 9th Sep 1922 | Morton \ M22 img202 | |
| The final design for the 'Stork' frame, referencing drawing N.sch. 1324. | 16th Sep 1922 | Morton \ M22 img203 | |
| Proposed modifications for the 'Heron' model, including changes to the frame, brakes, and exhaust system. | 18th Sep 1922 | Morton \ M22 img204 | |
| Modifications needed for the 'Heron' model, including front wheel brakes, an air pump, and exhaust system changes. | 18th Sep 1922 | Morton \ M22 img205 | |
| Preliminary arrangement for 'Stork' pneumatic brakes and outlining required modifications. | 30th Sep 1922 | Morton \ M22 img206 | |
| Proposed new exhaust system for the 'Stork' vehicle. | 30th Sep 1922 | Morton \ M22 img207 | |
| Letter concerning the testing of a camshaft-driven air pump for a four-wheel brake system on a 40/50 chassis. | 4th Oct 1922 | Morton \ M22 img208 | |
| Diagram illustrating the drilling positions on coupling flanges for a camshaft pump and wheel. | 6th Aug 1919 | Morton \ M22 img209 | |
| Testing and design of a camshaft-driven brake air pump for the 40/50 chassis and 'Vulture' engine. | 4th Oct 1922 | Morton \ M22 img210 | |
| Continued description of humps on one revolution of a camshaft, referring to original sketches. | 6th Oct 1922 | Morton \ M22 img211 | |
| Fitting of side carriers for spare wheels on various car models. | 6th Oct 1922 | Morton \ M22 img212 | |
| On the completion of front wheel brake designs for new models, and the planning for experimental parts production. | 9th Oct 1922 | Morton \ M22 img213 | |
| Completion of front-wheel brake designs and expediting experimental parts for six chassis. | 19th Oct 1922 | Morton \ M22 img214 | |
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