| Description | Date | Identifier | |
| Drawing for an automatic air pump cut-out device for the four-wheel brakes on the 'Heron' model. | 12th Oct 1922 | Morton \ M22 img215 | |
| Air pump control device for four-wheel brakes on the 'Heron' model, referencing drawings. | 12th Oct 1922 | Morton \ M22 img216 | |
| Defining the nomenclature for experimental chassis, codenamed 'Heron' and 'Seagull'. | 12th Oct 1922 | Morton \ M22 img217 | |
| Defining the nomenclature for two new experimental chassis, named 'heron' and 'seagull'. | 12th Oct 1922 | Morton \ M22 img218 | |
| Modifications required for fitting 'Stork' pneumatic brakes, including changes to the frame, dashboard, and pedal controls. | 14th Oct 1922 | Morton \ M22 img219 | |
| Modifications for pneumatic four-wheel brakes on the 'Stork' model. | 14th Oct 1922 | Morton \ M22 img220 | |
| The decision not to proceed with pneumatic four-wheel brakes, and a subsequent reversal for experimental testing. | 18th Oct 1922 | Morton \ M22 img221 | |
| Adjustments to the 'Heron' model's front wheel brake cams for the air brake and servo system. | 19th Oct 1922 | Morton \ M22 img222 | |
| Testing of shackle configurations for front springs in relation to front-wheel brakes on the Goshawk model. | 23th Oct 1922 | Morton \ M22 img223 | |
| Drawings for the 'Heron' air pump for four-wheel brakes, noting a necessary modification to the springs. | 19th Oct 1922 | Morton \ M22 img224 | |
| Experimental production of 'Heron' pneumatic brakes and associated chassis modifications. | 11th Nov 1922 | Morton \ M22 img225 | |
| Modifications to the 'Heron' front wheel brake system and new engine feet. | 17th Nov 1922 | Morton \ M22 img226 | |
| Providing preliminary information on the Heron Four Wheel Brakes hand brake operating gear and servo motor. | 18th Nov 1922 | Morton \ M22 img227 | |
| Revised pedal gear for the 'Stork' model, suitable for pneumatic brakes or a new servo system. | 19th Oct 1922 | Morton \ M22 img228 | |
| Listing outstanding work for the 'Stork' and 'Heron' chassis, detailing parts and departmental responsibilities. | 8th Nov 1922 | Morton \ M22 img229 | |
| The design, materials, and alternatives for a servo motor for brakes on the 'Heron' project. | 22th Nov 1922 | Morton \ M22 img230 | |
| The arrangement and material choices for a Heron servo motor for brakes on a 3-speed gearbox. | 22th Nov 1922 | Morton \ M22 img231 | |
| Conclusions from investigations into front spring anchorage and its effect on steering geometry. | 30th Nov 1922 | Morton \ M22 img232 | |
| Steering mechanism modifications for the Goshawk, Heron, and Seagull models. | 2nd Dec 1922 | Morton \ M22 img233 | |
| Responding to a query on the capacity and specifications of the 'Seagull' engine. | 9th Dec 1922 | Morton \ M22 img234 | |
| Engine capacity, bore, and stroke for the 'Seagull' P1 Prototype engine. | 9th Dec 1922 | Morton \ M22 img235 | |
| Request for weight information on the Goshawk and 40/50 engines to estimate the weight of the 'Seagull' engine. | 9th Dec 1922 | Morton \ M22 img236 | |
| Telegram from Basil Johnson to Hives requesting particulars of a conference concerning the Heron and Seagull projects. | 20th Apr 1922 | Morton \ M22 img237 | |
| Goshawk and Seagull prototype axles and gearboxes, comparing them to the 20HP and 40/50 models. | 21th Dec 1922 | Morton \ M22 img238 | |
| Design and production status of components for the Goshawk and Seagull models, including axles and gearboxes. | 27th Dec 1922 | Morton \ M22 img239 | |
| Induction pipe arrangements for the Seagull, Hawk-Northcliffe, and Goshawk engines. | 27th Dec 1922 | Morton \ M22 img240 | |
| Relocating the brake servo motor to the right-hand side of the 'Heron' gearbox. | 30th Dec 1922 | Morton \ M22 img241 | |
| Urgent ordering of a car body for the 'Stork' and 'Heron' chassis. | 6th Jan 1923 | Morton \ M22 img242 | |
| Preparation of open touring and closed bodies for 'Stork' and 'Heron' models. | 8th Jan 1923 | Morton \ M22 img243 | |
| Proposal for a light speed body for the 'Stork' and 'Heron' models. | 10th Jan 1923 | Morton \ M22 img244 | |
| Providing feedback on the performance of car 6-EX, noting noise issues and a proposal for its sale. | 10th Jan 1923 | Morton \ M22 img245 | |
| The specifications for a sports touring body for the 'Stork' and 'Heron' chassis. | 1st Jan 1923 | Morton \ M22 img246 | |
| Specifications for a car's finish, color, wheels, and body construction. | 3rd Jan 1923 | Morton \ M22 img247 | |
| Front axle pivot lean for Stork and Heron models, comparing specifications with Goshawk, 40/50, and Delage cars. | 3rd Jan 1923 | Morton \ M22 img248 | |
| Query seeking details of a Delage steering system to understand and compare its stiffness characteristics. | 17th Jan 1923 | Morton \ M22 img249 | |
| Policy memo discussing the development of experimental cars, the 'Heron' and 'Seagull', and the future 40/50 model. | 17th Jan 1923 | Morton \ M22 img250 | |
| Policy statement regarding the fitting of front wheel brakes to the 40/50 chassis. | 18th Jan 1928 | Morton \ M22 img251 | |
| The cancellation of the Heron chassis design in favour of prioritising the Seagull design. | 18th Jan 1928 | Morton \ M22 img252 | |
| Future development strategy for the 40/50, Heron, and Seagull models. | 19th Jan 1923 | Morton \ M22 img253 | |
| Proposal for a sports body for the 'Stork' chassis, its suitability for other models, and coachbuilding estimates. | 20th Jan 1923 | Morton \ M22 img254 | |
| Arrangements for building a speed body for the 'Stork' project with Park Wards and other coachbuilders. | 20th Jan 1923 | Morton \ M22 img255 | |
| Procurement and specifications for a sports body for the 'Stork' chassis. | 23th Jan 1923 | Morton \ M22 img256 | |
| Clarifying that a specific body design is for experimental purposes only and requires review by the Coachbuilding Committee. | 23th Jul 1928 | Morton \ M22 img257 | |
| Confidential memo on the decision to abandon the 'Stork' and 'Heron' models and progress with the 'Seagull' model. | 26th Jan 1923 | Morton \ M22 img258 | |
| Testing of a new front axle with front wheel brakes on the 'Stork' chassis, and also the potential trial of a pneumatic brake operating mechanism. | 29th Jan 1923 | Morton \ M22 img259 | |
| Directive to halt work on the Heron and Stork projects to prioritize development of the Seagull (P1 Prototype). | 29th Jan 1923 | Morton \ M22 img260 | |
| Basic tests for engine torque reaction vibrations. | 17th Jul 1923 | Morton \ M22 img261 | |
| Measuring engine torque and fitting a spring-controlled, frictionally-damped arm to estimate friction damping. | 1st Sep 1923 | Morton \ M22 img262 | |
| Secret memo detailing schemes for engine torque reaction dampers and ignition wiring for the 40/50 chassis. | 13th Oct 1923 | Morton \ M22 img263 | |
| Exposed valve stems and tappets enclosure scheme for a 10,000 miles trial run on Chassis No. 12-EM. | 1st Jan 1924 | Morton \ M22 img264 | |
| Secret memo detailing plans for a visit to W.W., listing cars to be brought for testing and approval. | 17th Oct 1924 | Morton \ M22 img265 | |
| From CJ to Hs enquiring about the outcome of a meeting with Mr. Royce at West Wittering. | 1st Apr 1925 | Morton \ M22 img266 | |
| From Hs. to CJ. regarding a visit to West Wittering to test EAC cars and discuss steering, brakes, and other issues. | 29th Apr 1925 | Morton \ M22 img267 | |
| Modifications to the radiator and bonnet of Mr. Royce's car following his criticism. | 6th Jul 1925 | Morton \ M22 img268 | |
| Recommendation regarding the retention, testing, and disposal of various American competitor cars. | 23th Nov 1920 | Morton \ M22 img269 | |
| Methods for heating the carburation system for the 40/50 HP chassis, referencing American car designs. | 3rd Jan 1921 | Morton \ M22 img270 | |
| Engine starting issues, starter motors, and post-war 3-speed gearbox design. | 3rd Jan 1921 | Morton \ M22 img271 | |
| Water pump with metallic packing, referencing drawing No. LeC.850 and requesting an experimental test. | 1st Aug 1917 | West Wittering \ A \ August1917 Scan0 | |
| Request for quantitative results from testing a new paddle-type rotor water pump. | 2nd Aug 1917 | West Wittering \ A \ August1917 Scan1 | |
| Cancellation notice for an experiment concerning piston clearance when starting up cold. | 13th Aug 1917 | West Wittering \ A \ August1917 Scan2 | |
| Removal and cancellation of an extra oil pipe on the epicyclic gearbox. | 13th Aug 1917 | West Wittering \ A \ August1917 Scan3 | |
| Progress update request on a Single Valve Air Pump and Separate Relief Valve, with instructions for sending models to Mr. Olley in the States. | 13th Aug 1917 | West Wittering \ A \ August1917 Scan4 | |
| Note on roller bearing universal joints for airship engines, favouring the serrated type for light construction. | 13th Aug 1917 | West Wittering \ A \ August1917 Scan5 | |
| Missing coil and condenser parts for a received six-cylinder Remy distributor. | 18th Aug 1917 | West Wittering \ A \ August1917 Scan6 | |
| Suggesting a long duration engine test without crankshaft balance weights to investigate wear. | 28th Aug 1917 | West Wittering \ A \ August1917 Scan7 | |
| New pattern for a more elastic and longer universal shaft for the water pump spring drive. | 28th Aug 1917 | West Wittering \ A \ August1917 Scan8 | |
| Design improvements and material choices for a single valve air pump. | 28th Aug 1917 | West Wittering \ A \ August1917 Scan9 | |
| With sketch and handwritten notes proposing modifications to a single valve air pump. | 27th Aug 1918 | West Wittering \ A \ August1917 Scan10 | |
| Requesting the standardization of the Lightened Wireless Drive. | 29th Aug 1917 | West Wittering \ A \ August1917 Scan11 | |
| Request to arrange for the standardisation of a new type castellated nut and main bearing bolts. | 28th Aug 1917 | West Wittering \ A \ August1917 Scan12 | |
| Memo discussing the testing methodology for an epicyclic gear system. | 3rd Dec 1917 | West Wittering \ A \ December1917 Scan0 | |
| Letter regarding an urgent improved design for a taper cotter fixing for a valve washer. | 11th Dec 1917 | West Wittering \ A \ December1917 Scan1 | |
| The standardization of the lightened camshaft drive and the lightened ignition wiring tube. | 15th Dec 1917 | West Wittering \ A \ December1917 Scan2 | |
| Redesign and standardization of plain washers for aero engines and motor cars. | 22th Dec 1917 | West Wittering \ A \ December1917 Scan3 | |
| Advantages of a new articulated rod pin design. | 22th Dec 1917 | West Wittering \ A \ December1917 Scan4 | |
| Complaints of studs pulling out of aluminium and Mr. Royce's recommendation for thread length. | 3rd Jul 1917 | West Wittering \ A \ July1917 Scan0 | |
| Static load test on aluminium crankcase slings to determine their failure point. | 18th Aug 1917 | West Wittering \ A \ July1917 Scan1 | |
| Incorrect springs supplied for the crankshaft gear wheel spring drive. | 5th Jul 1917 | West Wittering \ A \ July1917 Scan2 | |
| Approving the construction of a new carburetter air inlet, warning that it must be petrol-tight to prevent fire. | 5th Jul 1917 | West Wittering \ A \ July1917 Scan3 | |
| Tensile test results for various aluminium piston alloys and proposing further tests. | 6th Jul 1917 | West Wittering \ A \ July1917 Scan4 | |
| Stating the material specification for the Oil Pump Annulus is no longer important as the current practice is sufficient. | 11th Jul 1917 | West Wittering \ A \ July1917 Scan5 | |
| Instructing the Experimental Department to test pistons made from the new B.4 aluminium alloy. | 11th Jul 1917 | West Wittering \ A \ July1917 Scan6 | |
| Requesting a reduction in the quantity of petrol tank measuring sticks from two to one. | 7th Jul 1917 | West Wittering \ A \ July1917 Scan7 | |
| Requesting a reduction in the quantity of petrol tank measuring sticks to be despatched. | 7th Jul 1917 | West Wittering \ A \ July1917 Scan8 | |
| Requesting a report on the casting characteristics of various aluminium alloys for engine tests. | 9th Jul 1917 | West Wittering \ A \ July1917 Scan9 | |
| .010' error in the valve lifter and proposing a modification to curve its surface. | 13th Jul 1917 | West Wittering \ A \ July1917 Scan10 | |
| Suggesting a special fixture for machining cross steering tube joint brasses. | 14th Jul 1917 | West Wittering \ A \ July1917 Scan11 | |
| Errors in cylindrical tappet bolts due to misaligned valve guides and rockers. | 1st Jul 1917 | West Wittering \ A \ July1917 Scan12 | |
| Inquiry regarding the status of obtaining thinner cylinder jackets. | 20th Jul 1917 | West Wittering \ A \ July1917 Scan13 | |
| Requesting standardisation sheets for a new camshaft drive following successful testing. | 20th Jul 1917 | West Wittering \ A \ July1917 Scan14 | |
| Requesting the creation of standardisation sheets for a new camshaft drive. | 20th Jul 1917 | West Wittering \ A \ July1917 Scan15 | |
| Request for a specification for a single drawer cabinet for an experimental index, or for one to be made. | 20th Jul 1917 | West Wittering \ A \ July1917 Scan16 | |
| Instructions to put a large radius on a cylindrical tappet screw face. | 21th Jul 1917 | West Wittering \ A \ July1917 Scan17 | |
| Request for a more complete report on piston head temperature variations for Mr. Royce. | 24th Jul 1917 | West Wittering \ A \ July1917 Scan18 | |
| Report on the use of vaseline or mineral grease in the water system. | 30th Jul 1917 | West Wittering \ A \ July1917 Scan19 | |
| Requesting descriptive booklets for Atwater Kent Ignition Timers. | 31th Jul 1917 | West Wittering \ A \ July1917 Scan20 | |
| Requesting the setup of materials to test an induction pressure regulating device and instructions for related drawings. | 4th Jun 1917 | West Wittering \ A \ June1917 Scan0 | |
| Properties, sourcing, and price of Magnalium Metal. | 6th Jun 1917 | West Wittering \ A \ June1917 Scan1 | |
| Proposing tests for a new, less brittle aluminium-copper alloy for pistons. | 6th Jun 1917 | West Wittering \ A \ June1917 Scan2 | |
| Confirming the standardisation to cease using extra oil pipes for the cylinders or epicyclic gears. | 9th Jun 1917 | West Wittering \ A \ June1917 Scan3 | |
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