| Description | Date | Identifier | |
| The failure of rear springs on a Goshawk 11 car after 14,700 miles in France. | 14th Sep 1922 | West Wittering \ I \ September1922 Scan62 | |
| Tests of moulded insulating materials and moulded commutators. | 14th Sep 1922 | West Wittering \ I \ September1922 Scan63 | |
| Use of moulded commutators for the Goshawk production starter motor. | 14th Sep 1922 | West Wittering \ I \ September1922 Scan64 | |
| Comparative heat test on insulation specimens of Sho, Bakelite, and Mouldensite. | 12th Sep 1922 | West Wittering \ I \ September1922 Scan65 | |
| Test results for diameter changes, shrinkage, and blistering of three material specimens: Elo, Bakelite, and Mouldensite. | 12th Sep 1922 | West Wittering \ I \ September1922 Scan66 | |
| The comparative testing of insulating materials named Elo, black Mouldensite, and brown Mouldensite. | 10th Aug 1922 | West Wittering \ I \ September1922 Scan67 | |
| Results of a heating test on specimens of Black and Brown Mouldenite, detailing weight increase and physical degradation. | 10th Aug 1922 | West Wittering \ I \ September1922 Scan68 | |
| Temperature-related properties of three material specimens. | 10th Aug 1922 | West Wittering \ I \ September1922 Scan69 | |
| Recommendation to adopt the P & R Battery BD.11 as a simultaneous standard for the 40/50 model. | 15th Sep 1922 | West Wittering \ I \ September1922 Scan70 | |
| Comparative petrol consumption tests from Brooklands and other road tests. | 15th Sep 1922 | West Wittering \ I \ September1922 Scan71 | |
| Table comparing petrol consumptions from tests conducted at Brooklands with different axle and compression setups. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan72 | |
| The cause and potential solutions for engine gear rattles in the Goshawk II model. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan73 | |
| Note about an agreement with the D.O. to make a T-shaped plate for the Goshawk-II. | 9th Sep 1922 | West Wittering \ I \ September1922 Scan74 | |
| Comparison of petrol consumption for different axle configurations and compression ratios under various test conditions. | 16th Sep 1922 | West Wittering \ I \ September1922 Scan75 | |
| Responding to a telegram about testing the Goshawk-11 Silencer and Cut-out. | 16th Sep 1922 | West Wittering \ I \ September1922 Scan76 | |
| Sending of paint colour pattern books and a sample for the 6.EX Car. | 19th Sep 1922 | West Wittering \ I \ September1922 Scan77 | |
| Goshawk 11 radiator shutter sample, suggesting it is too light and should be made from thicker material. | 20th Sep 1922 | West Wittering \ I \ September1922 Scan78 | |
| Suggesting a change to a vacuum feed petrol system from a pressure system. | 18th Sep 1922 | West Wittering \ I \ September1922 Scan79 | |
| Tests to eliminate engine pulsations on a 4-Goshawk-11 car. | 1st Sep 1922 | West Wittering \ I \ September1922 Scan80 | |
| The weights of the Goshawk chassis and its various accessories. | 1st Sep 1922 | West Wittering \ I \ September1922 Scan81 | |
| Preparation of two Goshawk-11 cars for the Paris Show. | 23th Sep 1922 | West Wittering \ I \ September1922 Scan82 | |
| Proposal to handle alterations in design for the Goshawk 11 chassis using standardisation sheets. | 26th Sep 1922 | West Wittering \ I \ September1922 Scan83 | |
| Issues with demountable straight-sided rims coming off when tyres are deflated, and the subsequent improvements and tools supplied by Dunlop. | 30th Sep 1922 | West Wittering \ I \ September1922 Scan84 | |
| Investigations and improvements for the Goshawk dynamo, focusing on brushes and vibrator regulators. | 1st Apr 1923 | West Wittering \ J \ April1923 Scan0 | |
| Starter motor gear ratios and engine starting speeds. | 1st Apr 1923 | West Wittering \ J \ April1923 Scan1 | |
| Proposal to revise the standard set of feeler blades for the 40/50 and Goshawk chassis. | 4th Apr 1923 | West Wittering \ J \ April1923 Scan2 | |
| Experimental report on a wheel carrier for the 40/50 model before selling it to coachbuilders. | 14th Apr 1923 | West Wittering \ J \ April1923 Scan3 | |
| Request to trial a set of Goshawk 11 dipping headlights with a hand lever control mounted on the steering column. | 24th Apr 1923 | West Wittering \ J \ April1923 Scan4 | |
| Critique of the Goshawk saloon body and proposals for a new standard design for the 20.HP chassis. | 26th Apr 1923 | West Wittering \ J \ April1923 Scan5 | |
| The performance and proposed design changes for two 20.HP 'Goshawk' cars tested in the South of France. | 26th Apr 1923 | West Wittering \ J \ April1923 Scan6 | |
| New larger crankshaft design for the Goshawk engine pending a 10,000-mile trial. | 26th Apr 1923 | West Wittering \ J \ April1923 Scan7 | |
| Modifying the Goshawk fan drive by using a belt from the dynamo drive to reduce rattling. | 26th Apr 1923 | West Wittering \ J \ April1923 Scan8 | |
| Technical memorandum discussing ignition options for the Goshawk engine, comparing battery versus magneto systems. | 26th Apr 1923 | West Wittering \ J \ April1923 Scan9 | |
| Page detailing considerations for a new cobalt steel magnet and magneto driving shaft coupling. | 26th Apr 1923 | West Wittering \ J \ April1923 Scan10 | |
| Recommending the immediate adoption of a third design for the Goshawk Damped Spring Drive. | 26th Apr 1923 | West Wittering \ J \ April1923 Scan11 | |
| Improvements to the Goshawk rear axle, including a stronger casting and a coarser bevel gear. | 26th Apr 1923 | West Wittering \ J \ April1923 Scan12 | |
| Advantages and disadvantages of moving the oil pump drive to the centre of the engine. | 27th Apr 1923 | West Wittering \ J \ April1923 Scan13 | |
| Shortcomings of braking systems, engine vibrations, and competitor vehicles. | 28th Apr 1924 | West Wittering \ J \ April1923 Scan14 | |
| Hand-drawn sketch with typed annotations of a pawl and ratchet mechanism. | 30th Apr 1923 | West Wittering \ J \ April1923 Scan15 | |
| Outlining communication procedures for officials traveling abroad on business. | 30th Apr 1923 | West Wittering \ J \ April1923 Scan16 | |
| From 'Hs.' to R. Le Canadel regarding the preparation and transportation of a Goshawk car for testing. | 8th Apr 1923 | West Wittering \ J \ April1923 Scan17 | |
| The use of coarser pitch bevel and ground gears for the rear axle and engine. | 15th Apr 1923 | West Wittering \ J \ April1923 Scan18 | |
| Sticking issue with the Bijur starter drive pinion and proposing a clearance fix. | 4th Apr 1923 | West Wittering \ J \ April1923 Scan19 | |
| Modifications to the 'Heron' & 'Stork' front axle radius rods and associated components. | 10th Dec 1922 | West Wittering \ J \ December1922 Scan0 | |
| Design modifications to steering components, including the cross steering tube, adjusting screw, and cotter pin taper. | 8th May 1934 | West Wittering \ J \ December1922 Scan1 | |
| Replacement of the Bendix starter motor drive with a Bijur type pinion for the Goshawk model. | 1st Dec 1922 | West Wittering \ J \ December1922 Scan2 | |
| Proposed change to the fan drive arrangement on the Goshawk engine and its implications for the 'Seagull' engine. | 8th Dec 1922 | West Wittering \ J \ December1922 Scan3 | |
| New arrangement and modifications for the Goshawk engine ignition system, including the coil, distributor, and wiring. | 1st Dec 1922 | West Wittering \ J \ December1922 Scan4 | |
| From RS to HS & HL regarding trialling a 'New Process Oil' from Alex: Duckham & Co. Ltd. | 12th Dec 1922 | West Wittering \ J \ December1922 Scan5 | |
| Internal memorandum discussing design options and recommendations for spring shackles. | 14th Dec 1922 | West Wittering \ J \ December1922 Scan6 | |
| Dipping headlamps in light of new legislation and improvements to instrument board lamps. | 5th Dec 1922 | West Wittering \ J \ December1922 Scan7 | |
| Various sales requests and engineering considerations for Goshawk, 40/50, and 20.HP chassis. | 11th Aug 1920 | West Wittering \ J \ December1922 Scan8 | |
| Querying the correct weight of a Goshawk chassis. | 7th Dec 1922 | West Wittering \ J \ December1922 Scan9 | |
| Drawings for a fan driven from the dynamo drive on a Goshawk 11 engine to reduce gear noise. | 7th Dec 1922 | West Wittering \ J \ December1922 Scan10 | |
| The Goshawk starter motor, discussing pinion replacement and the material for the flywheel gear. | 7th Dec 1922 | West Wittering \ J \ December1922 Scan11 | |
| Modifications to the rear shackles on the front springs for the 'Stork' & 'Heron' models. | 8th Dec 1922 | West Wittering \ J \ December1922 Scan12 | |
| Operating gear for the 'Heron' & 'Stork' exhaust system cutout. | 8th Dec 1922 | West Wittering \ J \ December1922 Scan13 | |
| Sending a general arrangement for the 'Stork' & 'Heron' radius rods and steering components. | 8th Dec 1922 | West Wittering \ J \ December1922 Scan14 | |
| Modifications to the Goshawk II engine's battery ignition system, with reference to three new drawings. | 1st Dec 1922 | West Wittering \ J \ December1922 Scan15 | |
| Proposed improvements to the ignition system and wiring layout. | 9th Dec 1922 | West Wittering \ J \ December1922 Scan16 | |
| Mr. Royce's instruction to use double-ended tubular box spanners to simplify the tool kit. | 9th Dec 1922 | West Wittering \ J \ December1922 Scan17 | |
| Proposing modifications to Goshawk 11 valves following a burnt valve incident. | 9th Dec 1922 | West Wittering \ J \ December1922 Scan18 | |
| The internal H.T. connection for the Goshawk II battery ignition coil. | 9th Dec 1922 | West Wittering \ J \ December1922 Scan19 | |
| Potential legislation on headlights, requesting the creation of experimental dipping headlight sets. | 12th Dec 1922 | West Wittering \ J \ December1922 Scan20 | |
| The rectification of a Maythorn Saloon, car X3730. | 12th Dec 1922 | West Wittering \ J \ December1922 Scan21 | |
| Bushes for springs on a 20.HP model, clarifying wear on the top spring leaf. | 13th Dec 1922 | West Wittering \ J \ December1922 Scan22 | |
| Failure of a Goshawk aluminium steering box during testing and proposing modifications for its fixing. | 13th Dec 1923 | West Wittering \ J \ December1922 Scan23 | |
| Modifications for the 'Stork' & 'Heron' front wheel brakes. | 13th Dec 1922 | West Wittering \ J \ December1922 Scan24 | |
| Modifications to lever angles and the design of the cross steering lever boss. | 13th Dec 1922 | West Wittering \ J \ December1922 Scan25 | |
| Clerical error in the calculations for an RR. 40/50 dynamo. | 13th Dec 1922 | West Wittering \ J \ December1922 Scan26 | |
| Temporary bracket for the front shock absorber on 'Stork' & 'Heron' four-wheel brake models. | 15th Dec 1922 | West Wittering \ J \ December1922 Scan27 | |
| Three methods for managing pinion end thrust in the 'Seagull' rear axle design. | 16th Dec 1922 | West Wittering \ J \ December1922 Scan28 | |
| Design reconsideration points for the Goshawk II magneto ignition system. | 16th Dec 1922 | West Wittering \ J \ December1922 Scan29 | |
| Modifications for an 18' steering wheel model and related construction queries. | 16th Dec 1922 | West Wittering \ J \ December1922 Scan30 | |
| Approval from Mr. Royce for modifications to the Goshawk 11 Magneto Coupling Shaft. | 16th Dec 1922 | West Wittering \ J \ December1922 Scan31 | |
| Mr. Royce's design suggestions for an oil level indicator on the 40/50 chassis. | 16th Dec 1922 | West Wittering \ J \ December1922 Scan32 | |
| Design improvements for engine valves and spring drives related to the Goshawk project. | 18th Dec 1922 | West Wittering \ J \ December1922 Scan33 | |
| Design decisions for the half-time gears, magneto, tappets, and exhaust valve for the 'Seagull' project. | 20th Dec 1922 | West Wittering \ J \ December1922 Scan34 | |
| Causes and potential solutions for steering wobble, focusing on radius rods and pivot geometry. | 20th Dec 1922 | West Wittering \ J \ December1922 Scan35 | |
| Drawings for the 'Seagull' engine's double oil pump and main oil lead. | 22th Dec 1922 | West Wittering \ J \ December1922 Scan36 | |
| Drawing No. LeC 1662, detailing the camshaft and intermediate gear wheels for the 'Seagull' engine. | 22th Dec 1922 | West Wittering \ J \ December1922 Scan37 | |
| The removal procedure for the 'Seagull' engine camshaft, bearings, and oil pump drive. | 22th Dec 1922 | West Wittering \ J \ December1922 Scan38 | |
| 'Seagull' engine drawing Lec 1658 and requesting the return of a blueprint. | 22th Dec 1922 | West Wittering \ J \ December1922 Scan39 | |
| From R. to HS. regarding personal car requirements and the importance of vehicle appearance for brand reputation. | 27th Dec 1922 | West Wittering \ J \ December1922 Scan40 | |
| Instructing a hold on the current Goshawk Spring Drive design in favour of a superior new one. | 27th Dec 1922 | West Wittering \ J \ December1922 Scan41 | |
| Cylinder configuration for a proposed Diesel aero engine to ensure smooth running and minimise torque. | 28th Dec 1922 | West Wittering \ J \ December1922 Scan42 | |
| Post office telegram message regarding the postponement of a visit. | 29th Dec 1922 | West Wittering \ J \ December1922 Scan43 | |
| Improved spring drive for the Goshawk engine, referencing drawing Lec 1665. | 30th Dec 1922 | West Wittering \ J \ December1922 Scan44 | |
| Design specifications for driving and damping springs. | 30th Dec 1922 | West Wittering \ J \ December1922 Scan45 | |
| Proposal for a cover to conceal the wire wheel hub on the Goshawk 11 side spare wheel carrier. | 30th Dec 1922 | West Wittering \ J \ December1922 Scan46 | |
| Critique of a Maythorn saloon body on a 7.Goshawk chassis, highlighting issues with weight, access, and seating. | 1st Dec 1922 | West Wittering \ J \ December1922 Scan47 | |
| Modification to a distribution board to clear interfering bolt heads. | 9th Dec 1922 | West Wittering \ J \ December1922 Scan48 | |
| Experiments and tests on a Goshawk ignition coil. | 11th Dec 1922 | West Wittering \ J \ December1922 Scan49 | |
| Chassis experiments comparing original Goshawk coils with improved versions and new designs. | 1st Dec 1922 | West Wittering \ J \ December1922 Scan50 | |
| Experiments conducted on coils, detailing tests of resistance, temperature, insulation, and sparking. | 29th Nov 1922 | West Wittering \ J \ December1922 Scan51 | |
| Continued testing of coil windings, including temperature, insulation, and sparking gap performance. | 29th Nov 1922 | West Wittering \ J \ December1922 Scan52 | |
| Test results for inductance and sparking performance before and after sawing off the hedgehogging at the ends of a component. | 12th Dec 1922 | West Wittering \ J \ December1922 Scan53 | |
| Trend by US tyre makers to increase tyre sizes for the 40/50 HP model, outlining the benefits. | 12th Dec 1922 | West Wittering \ J \ December1922 Scan54 | |
| Letter from Dunlop to Rolls Royce regarding tyre development for 20' wheels and the effects of lower pressures. | 28th Nov 1922 | West Wittering \ J \ December1922 Scan55 | |
| Burnt Goshawk engine exhaust valve, its probable cause, and a suggested modification to the radiator. | 1st Dec 1922 | West Wittering \ J \ December1922 Scan56 | |
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