| Description | Date | Identifier | |
| Modifications to the Goshawk 11 'B' type accelerator pedal. | 25th Apr 1922 | West Wittering \ H \ April1922 Scan31 | |
| Drawing No. LeC 1557 for a larger air valve for the Goshawk 11 carburetter. | 25th Apr 1922 | West Wittering \ H \ April1922 Scan32 | |
| Design of the Peregrine hand and foot brake equalising mechanism. | 25th Apr 1922 | West Wittering \ H \ April1922 Scan33 | |
| Design changes for the Goshawk 11 distribution box cover, including materials and lining. | 27th Apr 1922 | West Wittering \ H \ April1922 Scan34 | |
| Modifications to a broken front spring for a Goshawk 11. | 27th Apr 1922 | West Wittering \ H \ April1922 Scan35 | |
| Issue of flats forming on Goshawk 11 valve rockers and proposing a new design with a larger roller. | 28th Apr 1922 | West Wittering \ H \ April1922 Scan36 | |
| Design changes for the Goshawk 11 cross steering tube. | 28th Apr 1922 | West Wittering \ H \ April1922 Scan37 | |
| Design of a shock absorber ball joint connecting rod. | 29th Apr 1922 | West Wittering \ H \ April1922 Scan38 | |
| Response clarifying the average speed of the Goshawk chassis on a bumper, assuming specific tyres are fitted. | 6th Apr 1922 | West Wittering \ H \ April1922 Scan39 | |
| Ignition advance curve for the Goshawk II engine governor. | 20th Apr 1922 | West Wittering \ H \ April1922 Scan40 | |
| Continued note discussing an ignition modification, governor operation, and communication with Mr. Hives. | 20th Apr 1922 | West Wittering \ H \ April1922 Scan41 | |
| Sending an advance blueprint for the Goshawk Condenser materials question. | 1st Dec 1921 | West Wittering \ H \ December1921 Scan0 | |
| Goshawk 11 starter switch, pedal, brushes, and related drawings. | 1st Feb 1922 | West Wittering \ H \ February1922 Scan0 | |
| Return and testing of a Weyman Exhaust Feed Tank on a Goshawk chassis. | 2nd Feb 1922 | West Wittering \ H \ February1922 Scan1 | |
| Proposal for a 2-seater, boat-shaped speed body for the 'Swallow'/'Peregrine' model, detailing a staggered seating layout. | 1st Feb 1922 | West Wittering \ H \ February1922 Scan2 | |
| Alterations to the Goshawk 11 'B' type pedals to improve driver comfort. | 3rd Feb 1922 | West Wittering \ H \ February1922 Scan3 | |
| Requesting modifications to the Goshawk 11 distribution board diagram. | 14th Feb 1922 | West Wittering \ H \ February1922 Scan4 | |
| Drawing Lec 1531 for the Goshawk 11 starter motor cable connection. | 4th Feb 1922 | West Wittering \ H \ February1922 Scan5 | |
| Requesting further details about a specimen steering wheel and conveying Mr. Royce's instructions for the Goshawk steering wheel. | 6th Feb 1922 | West Wittering \ H \ February1922 Scan6 | |
| Relaying Mr. Royce's decision against adding a stop on the back shackle for the rear springs. | 7th Feb 1922 | West Wittering \ H \ February1922 Scan7 | |
| Suggestion for lubricating the back shackle on Goshawk 11 rear springs. | 7th Feb 1922 | West Wittering \ H \ February1922 Scan8 | |
| Complaints and proposed modifications regarding the accelerator pedal cutting into the body runner. | 8th Feb 1922 | West Wittering \ H \ February1922 Scan9 | |
| Scheme number for a revised connecting rod for the 40/50 front shock absorber. | 2nd Feb 1922 | West Wittering \ H \ February1922 Scan10 | |
| Recommendation to fit Hartford pattern double acting shock dampers to the rear of the 40/50 chassis to address issues with rear springs and cord tyres. | 10th Feb 1922 | West Wittering \ H \ February1922 Scan11 | |
| Page 2 of a letter advising on the use of Hartford pattern shock dampers and flexible springs for maximum damping effect. | 10th Feb 1922 | West Wittering \ H \ February1922 Scan12 | |
| The arrangement of the magneto control gear for the Goshawk II engine. | 10th Feb 1922 | West Wittering \ H \ February1922 Scan13 | |
| Letter discussing the reduction of lever parts on an engine in Derby and arranging for magneto wiring drawings. | 10th Feb 1922 | West Wittering \ H \ February1922 Scan14 | |
| Request for a specimen of a tele-gauge for a proposed new petrol level gauge, for Mr. Royce's inspection. | 10th Feb 1922 | West Wittering \ H \ February1922 Scan15 | |
| Drawing LeC 1533 for the Goshawk 11 engine, detailing a test double valve spring and a modified valve gear cover nut. | 1st Feb 1922 | West Wittering \ H \ February1922 Scan16 | |
| Suggestion for standard body models for the Peregrine and Goshawk cars to be sold as complete vehicles. | 14th Feb 1922 | West Wittering \ H \ February1922 Scan17 | |
| Suggesting standard body types for the Peregrine and Goshawk cars and a liaison for coachbuilders. | 4th Feb 1922 | West Wittering \ H \ February1922 Scan18 | |
| Outlining the requirements for a battery ignition system for the Goshawk engine. | 14th Feb 1922 | West Wittering \ H \ February1922 Scan19 | |
| Telegram from Royce to Hives querying the status of the D7P chassis. | 14th Feb 1922 | West Wittering \ H \ February1922 Scan20 | |
| Logistics for a car, including collecting it, fitting a seat in Derby, and acquiring the chassis. | 4th Feb 1922 | West Wittering \ H \ February1922 Scan21 | |
| Confirmation of a telegram from Royce to Hives concerning a D.F.P. chassis. | 14th Feb 1922 | West Wittering \ H \ February1922 Scan22 | |
| Proposed change to the tail-light and number-plate for the Goshawk 11. | 14th Feb 1922 | West Wittering \ H \ February1922 Scan23 | |
| Gear ratio selection for the Goshawk back axle, concerning the crown wheel and pinion teeth count. | 15th Feb 1922 | West Wittering \ H \ February1922 Scan24 | |
| Confirmation of a wire regarding testing procedures for Goshawk engine components. | 15th Feb 1922 | West Wittering \ H \ February1922 Scan25 | |
| Provision for fitting a shorter thermometer bulb to a Goshawk 11 cylinder head. | 16th Feb 1922 | West Wittering \ H \ February1922 Scan26 | |
| Trial and standardisation of a stronger valve tappet spring for the Goshawk engine. | 16th Feb 1922 | West Wittering \ H \ February1922 Scan27 | |
| Mr. Evernden's role as a liaison to avoid errors between the design department and coachbuilding supervisors. | 17th Feb 1922 | West Wittering \ H \ February1922 Scan28 | |
| On the recommendation to make Goshawk 11 slipper flywheels in steel. | 17th Feb 1922 | West Wittering \ H \ February1922 Scan29 | |
| Proceeding with a C.A.V. starter for pre-war cars, with modifications for a slower speed. | 18th Feb 1922 | West Wittering \ H \ February1922 Scan30 | |
| Position of the motor terminal for a Goshawk II engine. | 22th Feb 1922 | West Wittering \ H \ February1922 Scan31 | |
| Mr. Royce's decision not to add a feature to prevent starter switch terminals from rotating. | 23th Feb 1922 | West Wittering \ H \ February1922 Scan32 | |
| The measurement of a Telegauge part, with results sent to Mr. Bailey. | 28th Feb 1922 | West Wittering \ H \ February1922 Scan33 | |
| Sketch for a new boss on the gearbox to accommodate revised 'D' pedals. | 2nd Jan 1922 | West Wittering \ H \ January1922 Scan0 | |
| Query from Mr. Royce regarding the effectiveness of rounded edges on fly-wheel teeth for the Goshawk starter. | 5th Jan 1922 | West Wittering \ H \ January1922 Scan1 | |
| Urgent telegram requesting dimensions and particulars for a C.A.V. Lucas dynamo and coupling. | 4th Jul 1921 | West Wittering \ H \ January1922 Scan2 | |
| Modifications to the Goshawk 11 'D' pedals to increase leg room. | 4th Jan 1922 | West Wittering \ H \ January1922 Scan3 | |
| The Goshawk radiator fixing with set-up springs. | 14th Jan 1922 | West Wittering \ H \ January1922 Scan4 | |
| Alterations to the Goshawk II engine's crank-case for the dynamo drive, referencing scheme LeC 1514. | 1st Jan 1922 | West Wittering \ H \ January1922 Scan5 | |
| Exhaust heated throttle, pilot jet, and instrument board lettering for the 40/50 chassis. | 10th Jan 1922 | West Wittering \ H \ January1922 Scan6 | |
| Requesting a relocation of the Goshawk 11 oil filler for exhaust pipe clearance. | 10th Jan 1922 | West Wittering \ H \ January1922 Scan7 | |
| Modifications to the crankcase, oil filler, breather connection, and magneto drive. | 10th Jan 1922 | West Wittering \ H \ January1922 Scan8 | |
| Starter pinion and adapting engines for an independent dynamo gear wheel mounting. | 26th Apr 1917 | West Wittering \ H \ January1922 Scan9 | |
| The development of a strengthened camshaft wheel for better high-speed running, referencing drawing Lec1515. | 11th Jan 1922 | West Wittering \ H \ January1922 Scan10 | |
| Development progress and priority of a petrol level indicator for the Goshawk 11. | 17th Jan 1922 | West Wittering \ H \ January1922 Scan11 | |
| Proposed improvement to the lubrication method for the Goshawk 11 dynamo bearings. | 8th Oct 1935 | West Wittering \ H \ January1922 Scan12 | |
| Mechanical condition of a specimen vacuum feed tank and a proposal to test it. | 19th Jan 1922 | West Wittering \ H \ January1922 Scan13 | |
| Issues and potential improvements for Goshawk engine brakes, focusing on materials and mechanical design. | 19th Jan 1922 | West Wittering \ H \ January1922 Scan14 | |
| Alterations to brake levers, the effect on wire rope travel, and the elimination of footbrake squeak. | 26th Apr 1917 | West Wittering \ H \ January1922 Scan15 | |
| Wiring specifications for the Goshawk 11, detailing colour and numbering schemes for cables. | 19th Jan 1922 | West Wittering \ H \ January1922 Scan16 | |
| Query about sourcing an alternative for a specified 61/25 cable from Glover's make for drawing LeC 1044. | 26th Apr 1917 | West Wittering \ H \ January1922 Scan17 | |
| Cover note for the unfinished drawing LoC 1517 of the Goshawk 11 electric starter switch and control. | 20th Jan 1922 | West Wittering \ H \ January1922 Scan18 | |
| The Goshawk 11 Distribution Board, detailing its construction and requesting wiring instructions. | 21th Jan 1922 | West Wittering \ H \ January1922 Scan19 | |
| Drawing No. LeC 1520, which details an improved plunger for the Goshawk 11 Bendix Pinion. | 8th May 1933 | West Wittering \ H \ January1922 Scan20 | |
| Two fixing schemes for the Goshawk 11 longer front dumb iron, referencing drawings LeC.1524 and LeC.1525. | 26th Jan 1922 | West Wittering \ H \ January1922 Scan21 | |
| 'E' to 'Hs' regarding Mr. Royce's schedule, the Goshawk project, and car 6.EX. | 31th Jan 1922 | West Wittering \ H \ January1922 Scan22 | |
| Telegram regarding the readiness of a 1921 experimental chassis and required spring improvements. | 24th Nov 1920 | West Wittering \ H \ January1922 Scan23 | |
| Outlining chief dimensions for the 'Swallow' model and considering a French D.F.P. chassis as a guide. | 16th Jan 1922 | West Wittering \ H \ January1922 Scan24 | |
| Particulars of a 10.HP Peugeot chassis and comparing back axle gear ratios. | 8th Jan 1922 | West Wittering \ H \ January1922 Scan25 | |
| Engine specification, comparing 4 versus 6 cylinders, for the 'Swallow' model. | 8th Jan 1922 | West Wittering \ H \ January1922 Scan26 | |
| Acquisition of a D.F.P. car chassis for evaluation and developing new coachwork. | 26th Jan 1922 | West Wittering \ H \ January1922 Scan27 | |
| Proposal and justification for using a 6-cylinder engine in the new 'Swallow'/'Peregrine' model. | 28th Jan 1922 | West Wittering \ H \ January1922 Scan28 | |
| Design philosophy and specifications for a new small car model, comparing it to the Fiat and Goshawk. | 4th Jan 1922 | West Wittering \ H \ January1922 Scan29 | |
| Typed memorandum discussing car models, including the 40/50 and 12.HP, in relation to 'lady drivers' and market strategy. | 3rd Jan 1922 | West Wittering \ H \ January1922 Scan30 | |
| The specifications and construction of a Lucas motor for the Goshawk II. | 3rd Jan 1922 | West Wittering \ H \ January1922 Scan31 | |
| Page 2 of a report detailing motor specifications and performance analysis from a brake test, referencing a Goshawk engine and Lucas motor. | 3rd Jan 1922 | West Wittering \ H \ January1922 Scan32 | |
| Performance comparison of Lucas and C.A.V. motors, detailing figures for torque, speed, power, and efficiency. | 3rd Jan 1922 | West Wittering \ H \ January1922 Scan33 | |
| Comparison of Lucas and C.A.V. motors, noting battery performance and suggesting further tests on an engine. | 3rd Jan 1922 | West Wittering \ H \ January1922 Scan34 | |
| Blueprint graph showing starter motor brake efficiency for a Lucas starter motor on a Goshawk chassis. | 5th Jan 1922 | West Wittering \ H \ January1922 Scan36 | |
| Drawings for Lucas & C.A.V. Goshawk dynamos. | 5th Jan 1922 | West Wittering \ H \ January1922 Scan37 | |
| The rounded teeth on the 'Goshawk' starter for Goshawk II engines. | 6th Jan 1932 | West Wittering \ H \ January1922 Scan38 | |
| Model of a Goshawk 11 vacuum tank, suggesting a lighter construction. | 12th Jan 1922 | West Wittering \ H \ January1922 Scan39 | |
| Fitting a Klaxon horn to the Goshawk 11 dashboard, referencing drawing Lec 1526. | 28th Jan 1922 | West Wittering \ H \ January1922 Scan40 | |
| Printing and modifications for the Goshawk 11 wiring diagram. | 30th Jan 1922 | West Wittering \ H \ January1922 Scan41 | |
| Appropriate wiring gauge for the Goshawk starter motor compared to the 40/50 model. | 28th Jan 1922 | West Wittering \ H \ January1922 Scan42 | |
| Booklet on the Midgley-Scholey chassis electrical equipment and its control method. | 30th Jan 1922 | West Wittering \ H \ January1922 Scan43 | |
| Continued critique of an electrical system, discussing issues with the dynamo, vibrator regulator, Midgley-Scholey system, and junction box. | 30th Jan 1922 | West Wittering \ H \ January1922 Scan44 | |
| Methodology for a special battery efficiency test under starter motor conditions. | 31th Jan 1928 | West Wittering \ H \ January1922 Scan45 | |
| Experiment to determine the efficiency of recharging a car battery after multiple discharge cycles. | 1st Jan 1922 | West Wittering \ H \ January1922 Scan46 | |
| Battery efficiency tests concluding a 70% figure is correct based on replacement charge data. | 1st Jan 1922 | West Wittering \ H \ January1922 Scan47 | |
| With a sketch concerning the position of the steering wheel and front seats for the 10 HP D.F.P. car. | 10th Mar 1922 | West Wittering \ H \ March1922 Scan0 | |
| Telegram regarding the postage of an ignition switch and an enquiry about a starter switch. | 22th Mar 1922 | West Wittering \ H \ March1922 Scan1 | |
| Clarifying that a voltmeter was fitted to a 40/50 chassis for experimental purposes only, not as standard equipment. | 15th Mar 1922 | West Wittering \ H \ March1922 Scan2 | |
| Forwarding a letter about a new lubricant and suggesting a sample be obtained for testing. | 15th Mar 1922 | West Wittering \ H \ March1922 Scan3 | |
| Letter from Alexander Duckham & Co. to F.H. Royce regarding a new lubricating oil discovery. | 10th Mar 1922 | West Wittering \ H \ March1922 Scan4 | |
| Jamming issues with the Goshawk 11 Bendix Pinion and proposing solutions. | 15th Mar 1922 | West Wittering \ H \ March1922 Scan5 | |
| Page 2 of a document describing a mechanism's disengagement by the engine and the timing requirements for its teeth and threads. | 10th Dec 1920 | West Wittering \ H \ March1922 Scan6 | |
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