| Description | Date | Identifier | |
| Telegram from Royce regarding design modifications involving extra core length to facilitate connections. | 9th Jul 1918 | West Wittering \ J \ November1922 Scan28 | |
| Requirements and issues for the Goshawk engine ignition coil. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan29 | |
| Telegram about testing Goshawk coils, specifically the 'hedgehogg' core design and the effect of increased dimensions. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan30 | |
| Telegram regarding a design suitable for paraffin wax filling. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan31 | |
| From DA to HS requesting the collection of personal items from Spondon. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan32 | |
| P. & R. battery, favouring saving weight over increasing capacity. | 18th Nov 1922 | West Wittering \ J \ November1922 Scan33 | |
| Preliminary drawing for the Heron four-wheel brakes, hand brake operating gear, and Servo motor. | 18th Nov 1922 | West Wittering \ J \ November1922 Scan34 | |
| Trade-offs of using a P. & R. battery, focusing on weight versus capacity and reliability. | 18th Nov 1922 | West Wittering \ J \ November1922 Scan35 | |
| Telegram detailing the location of a test coil and the plan to measure its temperature. | 20th Nov 1922 | West Wittering \ J \ November1922 Scan36 | |
| Correcting a measurement from four and a half inches to three and a half inches for the Goshawk Coil. | 21th Nov 1922 | West Wittering \ J \ November1922 Scan37 | |
| From RS to HS regarding Mr. Royce's opinion on the commercial viability of extra small plugs. | 22th Nov 1922 | West Wittering \ J \ November1922 Scan38 | |
| Controls for the Goshawk II dipping headlights. | 22th Nov 1922 | West Wittering \ J \ November1922 Scan39 | |
| Proposed design for dipping head lights and collaboration with lamp manufacturer Lucas. | 22th Nov 1922 | West Wittering \ J \ November1922 Scan40 | |
| The implementation of a larger fan with spring tightening for the fan belt on all production Goshawk engines. | 23th Nov 1922 | West Wittering \ J \ November1922 Scan41 | |
| Present and future modifications to the Goshawk engine's ignition coil. | 23th Nov 1922 | West Wittering \ J \ November1922 Scan42 | |
| Testing a Westinghouse Vibrator for dynamo control on the Goshawk II lighting system. | 30th Nov 1922 | West Wittering \ J \ November1922 Scan43 | |
| Requesting experiments on the Goshawk engine ignition system, focusing on the stabilite coil and dry batteries. | 30th Nov 1922 | West Wittering \ J \ November1922 Scan44 | |
| The expected designs for a brake on the generator drive and a bonnet fastener. | 1st Nov 1922 | West Wittering \ J \ November1922 Scan45 | |
| External voltage and current regulators for chassis dynamos. | 3rd Nov 1922 | West Wittering \ J \ November1922 Scan46 | |
| Dynamo protection, fusing systems, and the volt-ampere characteristics of 'inherently controlled' dynamos. | 3rd Nov 1922 | West Wittering \ J \ November1922 Scan47 | |
| The requirements for dynamo and battery charging systems and their control methods. | 1st Nov 1922 | West Wittering \ J \ November1922 Scan48 | |
| Description of the operating principles of automatic regulators for dynamo output. | 13th Nov 1922 | West Wittering \ J \ November1922 Scan49 | |
| The regulation of dynamo output for a chassis electrical system. | 3rd Nov 1922 | West Wittering \ J \ November1922 Scan50 | |
| Comparative analysis of various dynamo and regulator systems, with a detailed description of the Aero type U.B. | 13th Nov 1922 | West Wittering \ J \ November1922 Scan51 | |
| Experiments and bench tests of an R. Bosch dynamo and regulator. | 3rd Nov 1922 | West Wittering \ J \ November1922 Scan52 | |
| The performance and issues with six-volt and twelve-volt Bijur electrical sets. | 3rd Nov 1922 | West Wittering \ J \ November1922 Scan53 | |
| Comparison of Liberty, Scott, and Westinghouse dynamo and regulator systems. | 3rd Nov 1922 | West Wittering \ J \ November1922 Scan54 | |
| Analysis of a vibrator regulator's performance and a proposal for designing a new one to resolve issues with battery charging and dynamos. | 3rd Nov 1922 | West Wittering \ J \ November1922 Scan55 | |
| Suggestion to experimentally study regulators and develop a new design to prolong battery life. | 13th Nov 1922 | West Wittering \ J \ November1922 Scan56 | |
| Responding to a telegram about a Goshawk battery ignition coil fault, discussing insulation and colouring materials. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan57 | |
| Alternative materials such as wood dust, Elo, and Bakelite for use in coil cases. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan58 | |
| Battery ignition issues on the Goshawk engine, specifically electrical effects from the coil case at high temperatures. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan59 | |
| Experiments with Goshawk and other coils, focusing on the electrical characteristics of case materials. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan60 | |
| Investigation into coil failures, specifically the effects of temperature, casing materials, and condenser action causing electric shocks. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan61 | |
| Experiments to improve coil insulation and reduce dielectric loss using materials like mouldensite, bakelite, and paraffin wax. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan62 | |
| Analysis of an electrical effect on ignition coils, comparing different case materials and mounting methods. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan63 | |
| Analysis of D.C. leakage and insulation properties of a coil, particularly concerning the effects of temperature on bakelite components. | 1st Nov 1922 | West Wittering \ J \ November1922 Scan64 | |
| Ignition coil failure analysis, testing results with paraffin wax insulation, and proposing rubber sheathing as a solution. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan65 | |
| Experiments with ignition coils, comparing turn counts, insulation, and materials like bakelite and mouldensite. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan66 | |
| Notes from further experiments on ignition coils, discussing different materials and failure conditions. | 19th Nov 1922 | West Wittering \ J \ November1922 Scan67 | |
| The test results of a coil and future plans for coils in stabalite and bakelite cases. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan68 | |
| Reporting the failure of a modified fixing for Goshawk steering during a bump test. | 9th Nov 1922 | West Wittering \ J \ November1922 Scan69 | |
| Comparison of desirable features of the P & R Type BD.11 battery versus the Exide battery. | 14th Nov 1922 | West Wittering \ J \ November1922 Scan70 | |
| The specifications and testing of battery cell cases, comparing P & R patent material to standard Exide batteries. | 11th Nov 1925 | West Wittering \ J \ November1922 Scan71 | |
| Distributing electrical diagrams for external voltage and current regulators for chassis dynamos. | 14th Nov 1922 | West Wittering \ J \ November1922 Scan72 | |
| Schematics and descriptions for two types of external chassis dynamo regulators. | 14th Nov 1922 | West Wittering \ J \ November1922 Scan73 | |
| Description of the operation of a Bijur Vibrator Regulator & Dynamo. | 14th Nov 1922 | West Wittering \ J \ November1922 Scan74 | |
| Wiring diagram showing the connections for a Bijur Dynamo Regulator and Cutout. | 14th Nov 1922 | West Wittering \ J \ November1922 Scan75 | |
| Circuit diagrams for a Liberty Dynamo & Regulator and a Westinghouse Dynamo & Regulator. | 14th Nov 1922 | West Wittering \ J \ November1922 Scan76 | |
| Description of Scott, Liberty Dynamo, and Westinghouse Dynamo & Vibrator regulators. | 14th Nov 1922 | West Wittering \ J \ November1922 Scan77 | |
| Bench tests and experimental modifications for Goshawk ignition coil cases. | 14th Nov 1922 | West Wittering \ J \ November1922 Scan78 | |
| Tests on Goshawk ignition coil cases to determine their electrostatic and leakage effects under hot and cold conditions. | 13th Nov 1922 | West Wittering \ J \ November1922 Scan79 | |
| Continuation of a report on electrical tests of components and materials like Elo, bakelite, and stabalite for leakage and spark performance. | 15th Nov 1922 | West Wittering \ J \ November1922 Scan80 | |
| The delivery and specifications of Peto & Radford batteries for the Goshawk engine. | 15th Nov 1922 | West Wittering \ J \ November1922 Scan81 | |
| Technical evaluation of battery components, capacity, and a comparison between different battery models. | 15th Nov 1922 | West Wittering \ J \ November1922 Scan82 | |
| Quantity for an order of Goshawk batteries and the arrangement of samples from Peto & Radford. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan83 | |
| Description of external voltage and current regulators for chassis dynamos, comparing pre-war and post-war R. Bosch systems. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan84 | |
| Recommendations for an electrical system, suggesting the acquisition of a Bosch set for the Goshawk. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan85 | |
| Circuit diagram for a post-war R. Bosch dynamo and regulator unit. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan86 | |
| The modification of a Bleriot phi cutout for 24-volt operation. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan87 | |
| Proposed modifications to the Goshawk II front axle, specifically about pivot length and adjusting screw design. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan88 | |
| Total weight limits for the Goshawk car and the conditions for the guarantee. | 16th Nov 1922 | West Wittering \ J \ November1922 Scan89 | |
| Packard 27.HP car, comparing its capacity and merits against the Goshawk and other American cars. | 17th Nov 1922 | West Wittering \ J \ November1922 Scan90 | |
| Performance, testing, and potential improvements for the Mohawk battery ignition coil. | 18th Nov 1922 | West Wittering \ J \ November1922 Scan91 | |
| Methods for measuring the electrical properties and breakdown potential of insulating materials. | 18th Nov 1922 | West Wittering \ J \ November1922 Scan92 | |
| Experiments on coil construction, insulation, and performance to diagnose inefficiencies and ignition issues. | 18th Nov 1922 | West Wittering \ J \ November1922 Scan93 | |
| Experiments on ignition coils, their insulation, and performance characteristics. | 18th Nov 1922 | West Wittering \ J \ November1922 Scan94 | |
| Report discussing electrical leakage, the Johnsen and Rahbek effect, inductivity, and hysteresis loss in circuits. | 18th Nov 1922 | West Wittering \ J \ November1922 Scan95 | |
| Methods to reduce electrical loss in coils and transformers by impregnation and immersion. | 20th Nov 1922 | West Wittering \ J \ November1922 Scan96 | |
| Correcting previously stated Goshawk chassis weights and discussing guaranteed weight. | 20th Nov 1922 | West Wittering \ J \ November1922 Scan97 | |
| Performance comparison between the Goshawk and 40/50 models based on weight, engine displacement, and gear ratios. | 19th Jul 1917 | West Wittering \ J \ November1922 Scan98 | |
| Testing miniature Bosch sparking plugs on Goshawk and 40/50 engines, proposing dual ignition systems. | 20th Nov 1922 | West Wittering \ J \ November1922 Scan99 | |
| Magneto arrangements with automatic advance and the possibilities of a new miniature plug. | 19th Jul 1917 | West Wittering \ J \ November1922 Scan100 | |
| Proposal to bring two cars, Hawk Northcliffe and 7-Goshawk-11, to a location for inspection and fitting of new parts. | 21th Nov 1922 | West Wittering \ J \ November1922 Scan101 | |
| Technical memorandum detailing the specifications and testing of an experimental Goshuk battery ignition coil. | 21th Nov 1922 | West Wittering \ J \ November1922 Scan102 | |
| Experiments on ignition coils, focusing on electrostatic effects, leakage, resistance, and road trial results. | 21th Nov 1922 | West Wittering \ J \ November1922 Scan103 | |
| Observations on the insulation resistance of the high tension system under different conditions. | 21th Nov 1922 | West Wittering \ J \ November1922 Scan104 | |
| Feasibility of having two independent ignition systems on the 20 HP car. | 22th Nov 1922 | West Wittering \ J \ November1922 Scan105 | |
| Developing a dual ignition system with magneto and battery for the Goshawk car. | 19th Jul 1917 | West Wittering \ J \ November1922 Scan106 | |
| Goshawk car's ignition system, arguing against two independent ignitions in favour of a magneto-only setup. | 19th Jul 1917 | West Wittering \ J \ November1922 Scan107 | |
| Requesting a reply regarding the weight of tools and spares for the Goshawk chassis. | 23th Nov 1922 | West Wittering \ J \ November1922 Scan108 | |
| Weight limit for the Goshawk model, proposing a target of 30 cwt for the car to allow for passengers and luggage. | 23th Nov 1922 | West Wittering \ J \ November1922 Scan109 | |
| Urgent memo from R. to H.S. arranging a meeting with Mr. Rowledge, requesting they bring cars. | 23th Nov 1922 | West Wittering \ J \ November1922 Scan110 | |
| Changing the coil on the No. 6 Goshawk car, which resolved mis-fire and power issues. | 23th Nov 1922 | West Wittering \ J \ November1922 Scan111 | |
| Mr. Royce's criticisms of the front seats in a Goshawk Maythorn Saloon and instructions for their replacement. | 29th Nov 1922 | West Wittering \ J \ November1922 Scan112 | |
| Design of seating and windscreens, complaining about current fittings. | 2nd Dec 1922 | West Wittering \ J \ November1922 Scan113 | |
| Particulars of a Johnson & Phillips rectifier and comparing it to a B.T.H. Tungar rectifier. | 29th Nov 1922 | West Wittering \ J \ November1922 Scan114 | |
| Calculations and design considerations for the 'Seagull Dynamo', comparing it to the 'Goshawk' machine. | 29th Nov 1922 | West Wittering \ J \ November1922 Scan115 | |
| Comparison of dynamo machines, specifically the Bosch, Seagull, Goshawk, and Rotax models. | 29th Nov 1922 | West Wittering \ J \ November1922 Scan116 | |
| Performance of production Goshawk dynamos, comparing them to U.S.A. Bosch machines. | 20th Nov 1922 | West Wittering \ J \ November1922 Scan117 | |
| Design calculations and specifications for the Seagull Dynamo. | 20th Nov 1922 | West Wittering \ J \ November1922 Scan118 | |
| Calculations for armature and field coil specifications including resistance, turns, and wire gauge. | 11th Nov 1922 | West Wittering \ J \ November1922 Scan119 | |
| Calculation table for the magnetic circuit of an electrical component. | 11th Nov 1922 | West Wittering \ J \ November1922 Scan120 | |
| Calculations for wire and coil specifications, including resistance, turns, and current for a shunt machine. | 11th Nov 1922 | West Wittering \ J \ November1922 Scan121 | |
| List of principal quantities and calculations for an electrical machine's armature and field. | 28th Nov 1932 | West Wittering \ J \ November1922 Scan122 | |
| Comparison of dimensions and weights for the U.S.A. Bosch Dynamo, Rotax AT.4, and R.R. Goshawk. | 28th Nov 1932 | West Wittering \ J \ November1922 Scan123 | |
| Request for the reduction ratio and piston displacement to calculate the starting torque for the 'Seagull' starter motor. | 30th Nov 1922 | West Wittering \ J \ November1922 Scan124 | |
| Efficiency of French Pognom ignition plugs and requesting an evaluation against those used in England and Springfield. | 8th Aug 1923 | West Wittering \ K \ August1923 Scan0 | |
| Revised positioning of friction dampers for reaction vibration experiments. | 8th Sep 1923 | West Wittering \ K \ August1923 Scan1 | |
| The urgent requirement for larger headlamps for the 20.HP car. | 10th Aug 1923 | West Wittering \ K \ August1923 Scan2 | |
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