| Description | Date | Identifier | |
| List of specifications for radiator components and their assembly. | 19th Jan 1937 | Box 9 \ 3 03-page014 | |
| Letter from the Experimental Department requesting blueprints for a brass drain tap and a quick-releasing filler. | 9th Feb 1937 | Box 9 \ 3 03-page015 | |
| Letter from Rotherham & Sons Ltd. regarding the unavailability of blueprints and sending samples for a tap and ebonite filler. | 10th Feb 1937 | Box 9 \ 3 03-page016 | |
| Letter to Fisher & Ludlow Ltd. regarding the practicability of spot welding mild steel to 'Staybrite' stainless steel for bonnet and radiator parts. | 11th Feb 1937 | Box 9 \ 3 03-page017 | |
| Letter to Rotherham Ltd. requesting a quotation and technical details on a sample filler and drain tap. | 13th Feb 1937 | Box 9 \ 3 03-page018 | |
| Letter from Fisher & Ludlow discussing the practicality of spot welding mild steel to Staybrite stainless steel for radiator cases. | 16th Feb 1937 | Box 9 \ 3 03-page019 | |
| Holding letter to Messrs. Fisher & Ludlow Ltd. acknowledging their letter and advising that Mr. Steadman is away. | 17th Feb 1937 | Box 9 \ 3 03-page020 | |
| Request to obtain and forward mild steel channel portions for spot welding tests. | 22th Feb 1937 | Box 9 \ 3 03-page021 | |
| Letter to Fisher & Ludlow Ltd. regarding experiments in spot welding stiffeners to radiator shells and bonnet sides. | 22th Feb 1937 | Box 9 \ 3 03-page022 | |
| Revised design and specifications for the Wraith III radiator. | 19th Mar 1937 | Box 9 \ 3 03-page023 | |
| Experimental modifications to the radiator design, including filler cap alternatives and water level considerations. | 19th Mar 1937 | Box 9 \ 3 03-page024 | |
| Design, bearings and controls for the Wraith III Radiator Shutters. | 22th Mar 1937 | Box 9 \ 3 03-page025 | |
| Outlining the design and instructions for the Wraith III radiator shutters. | 22th Mar 1937 | Box 9 \ 3 03-page026 | |
| Invoice from Rotherham & Sons Ltd. and requesting payment approval for parts received on approval. | 31th Mar 1937 | Box 9 \ 3 03-page027 | |
| Request to send an official order to Messrs. Rotherham & Sons Ltd. for a tap and a filter. | 1st Apr 1937 | Box 9 \ 3 03-page028 | |
| The revised design for Wraith III front apron supports. | 21th Apr 1937 | Box 9 \ 3 03-page029 | |
| Forgotten drawing for the Wraith III water connections. | 15th May 1937 | Box 9 \ 3 03-page030 | |
| Request to create a detail drawing for a modified Wraith III radiator part. | 1st Jun 1937 | Box 9 \ 3 03-page031 | |
| Secret memo requesting a detail drawing for a new one-piece radiator side plate and bonnet angle for the Wraith III. | 1st Jun 1937 | Box 9 \ 3 03-page032 | |
| Design and materials for the Wraith III radiator stays. | 14th Jun 1937 | Box 9 \ 3 03-page033 | |
| Modification to the Wraith III radiator blanking plate to prevent rattling. | 15th Jun 1937 | Box 9 \ 3 03-page034 | |
| Correcting the specified material for the Wraith III radiator rest strip lacing. | 18th Jun 1937 | Box 9 \ 3 03-page035 | |
| Proposals to resolve clearance issues between the Wraith III radiator and the front wheel suspension. | 24th Jun 1937 | Box 9 \ 3 03-page036 | |
| Provision of clips and a hole for the radiator and dash wiring on the Wraith III. | 25th Jun 1937 | Box 9 \ 3 03-page037 | |
| Wiring arrangements and parts for the Wraith III radiator and dash. | 25th Jun 1937 | Box 9 \ 3 03-page038 | |
| Instruction to alter the Wraith radiator details to accommodate a different size rest strip. | 5th Jul 1937 | Box 9 \ 3 03-page039 | |
| Cost-saving proposal from John Marstons for the supply of the Wraith Radiator. | 17th Aug 1937 | Box 9 \ 3 03-page040 | |
| Request to detail and instruct radiator filling cap washers for the Wraith III. | 20th Aug 1937 | Box 9 \ 3 03-page041 | |
| Blueprints for a copper asbestos washer for the Wraith radiator filler cap, requesting an order of 6 sets for testing. | 28th Aug 1937 | Box 9 \ 3 03-page042 | |
| Blueprints for a copper asbestos washer for the Wraith radiator filler cap and requesting a test order. | 28th Aug 1937 | Box 9 \ 3 03-page043 | |
| Request to produce a rough scheme for a V-shaped transverse baffle for a Wraith III radiator to prevent water loss. | 14th Sep 1937 | Box 9 \ 3 03-page044 | |
| Design request for a knurled filler cap for the Wraith radiator, similar to the one for the Continental Ph.III. | 21th Sep 1937 | Box 9 \ 3 03-page045 | |
| Requesting the fitting of a new baffle scheme and modification of the inlet nozzle on a car's radiator. | 21th Sep 1937 | Box 9 \ 3 03-page046 | |
| Correspondence regarding blueprints for a Wraith radiator steam escape pipe. | 23th Sep 1937 | Box 9 \ 3 03-page047 | |
| Confirming the dispatch of blueprints for the Wraith radiator steam escape pipe. | 23th Sep 1937 | Box 9 \ 3 03-page048 | |
| Requesting the fitting of baffle scheme SCD.92 to all future Wraith radiators. | 29th Sep 1937 | Box 9 \ 3 03-page049 | |
| Instruction to supply six sets of parts for Wraith III Chassis radiator shutters. | 1st Oct 1937 | Box 9 \ 3 03-page050 | |
| Version of the PD.19 scheme for the bottom water connections on the Wraith III and Bentley III. | 1st Oct 1937 | Box 9 \ 3 03-page051 | |
| Work instructions for modifications to car 26-G-VI, involving swapping parts with cars 27-G-VI and 28-G-VI. | 4th Oct 1937 | Box 9 \ 3 03-page052 | |
| Radiator filler cap design issues and proposed modifications for the Wraith and other models. | 1st Oct 1937 | Box 9 \ 3 03-page053 | |
| Request to test a cheapened production idea on the Wraith model. | 5th Oct 1937 | Box 9 \ 3 03-page054 | |
| Alteration notice for Wraith III chassis, radiator, and associated fittings, detailing part changes and new drawings. | 6th Oct 1937 | Box 9 \ 3 03-page055 | |
| Modifications to the Wraith radiator top tank to improve clearance for assembly and the bonnet rest strip. | 26th Oct 1937 | Box 9 \ 3 03-page056 | |
| Blueprints and sample parts for a Wraith III radiator filler cap. | 27th Oct 1937 | Box 9 \ 3 03-page057 | |
| Technical note detailing increased clearance for the thermostat cover on the Wraith III radiator due to growing shutter lever forgings. | 11th Nov 1937 | Box 9 \ 3 03-page058 | |
| Arrangement drawing for the front apron of a Wraith III chassis for 6 sets. | 10th Nov 1937 | Box 9 \ 3 03-page059 | |
| Instructions to fit undershields, a radiator baffle, and a thermometer bulb to a 26-u-VI car. | 11th Nov 1937 | Box 9 \ 3 03-page060 | |
| Instructions for radiator modifications and the swapping of matrix units between 26.G.VI and 27.G.VI cars. | 7th Dec 1937 | Box 9 \ 3 03-page061 | |
| New filler cap and joint washer for a Wraith radiator, including blueprints. | 7th Dec 1937 | Box 9 \ 3 03-page062 | |
| Inquiry to a supplier about manufacturing a filler plug, requesting a quotation and material specifications. | 23th Dec 1937 | Box 9 \ 3 03-page063 | |
| Letter from Attwater & Sons declining to undertake a moulding due to a recess on the cap portion. | 28th Dec 1937 | Box 9 \ 3 03-page064 | |
| Letter discussing the manufacturability of a revised filler plug, seeking confirmation and quotations. | 29th Dec 1937 | Box 9 \ 3 03-page065 | |
| Blueprints for a Radiator Filler, required for a 15,000 miles trial on car 26-G-VI. | 30th Dec 1937 | Box 9 \ 3 03-page066 | |
| Quotation from Attwater & Sons for the cost of tools and moulding based on a provided drawing. | 30th Dec 1937 | Box 9 \ 3 03-page067 | |
| Instructions for the production of a Radiator Filler Plug for a Wraith III, including alternative materials and threading details. | 3rd Jan 1938 | Box 9 \ 3 03-page068 | |
| Instructions for nickel and chrome plating spun thread inserts before fitting into a casting. | 3rd Jan 1938 | Box 9 \ 3 03-page069 | |
| Cover sheet for two engine undersheets (G.CD.326) for the Wraith III. | 1st Jan 1938 | Box 9 \ 3 03-page070 | |
| Request for the manufacture of two copper pipe adaptors for testing Wraith radiator shutters. | 6th Jan 1938 | Box 9 \ 3 03-page071 | |
| Confirming modifications to be made to 100 sets of Wraith radiator parts. | 8th Jan 1938 | Box 9 \ 3 03-page072 | |
| Production of 100 sets of radiators for the Wraith model, proposing a more economical design. | 10th Jan 1938 | Box 9 \ 3 03-page073 | |
| Modifications to the top baffle for the Wraith & B.III radiator top tanks. | 12th Jan 1938 | Box 9 \ 3 03-page074 | |
| Modified radiator design for production chassis, detailing cost reductions and production arrangements. | 12th Jan 1938 | Box 9 \ 3 03-page075 | |
| Instruction sheet detailing parts and drawings for the Wraith III chassis radiator and fittings. | 15th Jan 1938 | Box 9 \ 3 03-page076 | |
| Completion and despatch of a new, more economical radiator design for the Wraith production chassis. | 25th Jan 1938 | Box 9 \ 3 03-page077 | |
| Requesting cost figures for various Wraith radiator components for comparative purposes. | 28th Jan 1938 | Box 9 \ 3 03-page078 | |
| New blue prints and alterations for a modified top baffle and radiator fittings on a Wraith III Chassis. | 22th Jan 1938 | Box 9 \ 3 03-page079 | |
| Instructions for minor modifications to the Wraith's temperature control system to correct water temperatures. | 1st Jan 1938 | Box 9 \ 3 03-page080 | |
| Test results for Wraith calorstats under varying shutter tensions and temperatures. | 31th Jan 1938 | Box 9 \ 3 03-page081 | |
| Temperature readings from tests on a car under various conditions, both stationary and on the road. | 31th Jan 1938 | Box 9 \ 3 03-page082 | |
| New scheme for the Wraith III radiator filler cap to prevent it from sticking. | 31th Jan 1938 | Box 9 \ 3 03-page083 | |
| New drawings and part changes for the Wraith III Chassis water connections and radiator fittings. | 1st Feb 1938 | Box 9 \ 3 03-page084 | |
| Continued list of parts for section 5250, including brackets, studs, and supports. | 1st Feb 1938 | Box 9 \ 3 03-page085 | |
| Cost-saving design change for the Wraith model's water connections and the sourcing of new hoses. | 1st Feb 1938 | Box 9 \ 3 03-page086 | |
| Cost-saving design change for Wraith & B.III radiator matrix units. | 2nd Feb 1938 | Box 9 \ 3 03-page087 | |
| Procurement and assembly of a matrix unit for a 27.G.VI car and the supply of thermostat units. | 8th Feb 1938 | Box 9 \ 3 03-page088 | |
| Requesting the detailing of a modification to the Wraith water drain tap to prevent antifreeze wastage. | 17th Feb 1938 | Box 9 \ 3 03-page089 | |
| Outsourcing, costs, and procurement of the Wraith radiator bottom tank and matrix unit. | 19th Feb 1938 | Box 9 \ 3 03-page090 | |
| The flow testing procedure for a core unit by Messrs. Marstons. | 19th Feb 1938 | Box 9 \ 3 03-page091 | |
| Changes to the rubber specifications for water hose connections on all Wraith cars. | 22th Feb 1938 | Box 9 \ 3 03-page092 | |
| Costs and recommendations for Wraith and B.III radiator bottom tanks and matrix units. | 23th Feb 1938 | Box 9 \ 3 03-page093 | |
| Manufacturing scheme for the Wraith radiator filler plug and insert. | 28th Feb 1938 | Box 9 \ 3 03-page094 | |
| Request to fabricate a prototype cowl and connections for a car heating system using warm air from the radiator. | 2nd Mar 1938 | Box 9 \ 3 03-page095 | |
| Five alterations to the Wraith Filler Cap EW.1665 drawing. | 5th Mar 1938 | Box 9 \ 3 03-page096 | |
| Request for a design scheme for a steam escape pipe on a Wraith radiator tank. | 29th Mar 1938 | Box 9 \ 3 03-page097 | |
| Request for a scheme for a Wraith radiator central mounting, to be designed to minimise cost. | 29th Mar 1938 | Box 9 \ 3 03-page098 | |
| Specification document for the 28.G.VI. car's cooling system. | 29th Mar 1938 | Box 9 \ 3 03-page099 | |
| Schemes for the bonnet and radiator of the Wraith III model, including modifications for a Widney hinge. | 30th Mar 1938 | Box 9 \ 3 03-page100 | |
| Final adjustment instructions for the radiator shutters on the Wraith III chassis. | 6th Apr 1938 | Box 9 \ 3 03-page101 | |
| Instructions and parts list for a modification to the Wraith III radiator top tank and fittings. | 11th Apr 1938 | Box 9 \ 3 03-page102 | |
| Urgent request to detail a steam valve for a Wraith car, to be included in a radiator rebuild. | 7th May 1938 | Box 9 \ 3 03-page103 | |
| Request for a works cost comparison of the Wraith radiator mounting. | 11th May 1938 | Box 9 \ 3 03-page104 | |
| Parts list for a modified radiator mounting for the Wraith III chassis, detailing required and non-required components. | 16th May 1938 | Box 9 \ 3 03-page105 | |
| Parts list for adapting a standard Firestone rubber mounting to a radiator. | 16th May 1938 | Box 9 \ 3 03-page106 | |
| Parts list memo detailing changes for a Wraith III chassis radiator and fittings. | 16th May 1938 | Box 9 \ 3 03-page107 | |
| Request to modify the radiator mounting on car 26.G.VI. during its rebuild. | 17th May 1938 | Box 9 \ 3 03-page108 | |
| Breakdown of estimated factory costs for various Wraith Radiator components and assemblies. | 28th Jan 1938 | Box 9 \ 3 03-page109 | |
| Instruction to modify a car's radiator by fitting a new steam escape scheme, SCD.730. | 11th Jun 1938 | Box 9 \ 3 03-page110 | |
| Request for blueprints and parts for the radiator and fittings of a Wraith III chassis. | 14th Jun 1938 | Box 9 \ 3 03-page111 | |
| Two schemes for a Wraith radiator steam escape pipe and steam valve. | 15th Jun 1938 | Box 9 \ 3 03-page112 | |
| Outlining the advantages of a production scheme for a steam valve in the cooling system. | 15th Jun 1938 | Box 9 \ 3 03-page113 | |
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