| Description | Date | Identifier | |
| The present position of the Wraith III designs. | 3rd Mar 1937 | Box 6 \ 6 06-page143 | |
| Table listing vehicle sections that are now cleared or partially cleared, with accompanying remarks on their status. | 3rd Mar 1937 | Box 6 \ 6 06-page144 | |
| Status update on cleared or partially cleared sections regarding valves, fittings, flywheel, and clutch. | 25th Feb 1937 | Box 6 \ 6 06-page145 | |
| Progress report on the design status of various vehicle components. | 3rd Mar 1937 | Box 6 \ 6 06-page146 | |
| Status report detailing the progress on various vehicle design sections. | 3rd Mar 1937 | Box 6 \ 6 06-page147 | |
| Status update on various component designs that have not yet been cleared by 'E'. | 3rd Mar 1937 | Box 6 \ 6 06-page148 | |
| List of vehicle design sections that have not yet been cleared, with remarks on their status. | 3rd Mar 1937 | Box 6 \ 6 06-page149 | |
| List of designs not yet cleared, with sections and remarks on outstanding actions. | 3rd Mar 1937 | Box 6 \ 6 06-page150 | |
| Sending a report on tests for serrated pressed fits for levers and ball pins. | 3rd Mar 1937 | Box 6 \ 6 06-page151 | |
| Tests carried out on serrated/pressed fit levers comparing knurled shafts with serrated ones. | 2nd Jun 1937 | Box 6 \ 6 06-page152 | |
| Shaft failure indicated by the shape of serrations when a lever was removed. | 6th Feb 1937 | Box 6 \ 6 06-page153 | |
| Graph showing the results of lever tests, plotting torque against the angle of twist for different fit types. | 26th Apr 1937 | Box 6 \ 6 06-page154 | |
| Graph plotting torque against the angle of twist for serrated/pressed fit lever tests. | 2nd Jan 1937 | Box 6 \ 6 06-page155 | |
| Design modifications for the Wraith III engine, focusing on cost reduction by replacing shouldered studs with plain studs. | 5th Mar 1937 | Box 6 \ 6 06-page156 | |
| Secret memo discussing the fitting of a raised engine mounting for the Wraith III. | 5th Mar 1937 | Box 6 \ 6 06-page157 | |
| Brief status update memo regarding the Wraith III design, specifically the gearbox and crankcase. | 9th Sep 1937 | Box 6 \ 6 06-page158 | |
| Status report on cleared or partially cleared vehicle sections and components. | 9th Mar 1937 | Box 6 \ 6 06-page159 | |
| Status report on parts which are now cleared or partially cleared for production. | 3rd Mar 1937 | Box 6 \ 6 06-page160 | |
| Progress report on the status of various engineering design sections being detailed. | 9th Mar 1937 | Box 6 \ 6 06-page161 | |
| Design status report detailing the progress of various automotive components. | 10th Mar 1937 | Box 6 \ 6 06-page162 | |
| Status report on designs that have not yet been cleared by 'E'. | 9th Mar 1937 | Box 6 \ 6 06-page163 | |
| Status report on designs awaiting clearance by H.S. | 11th Mar 1937 | Box 6 \ 6 06-page164 | |
| Design details and accompanying drawings for the Wraith III engine. | 11th Mar 1937 | Box 6 \ 6 06-page165 | |
| Four modification and inspection jobs to be carried out on car 24-G-VI. | 12th Mar 1937 | Box 6 \ 6 06-page166 | |
| Dispatch of drawings for a Wraith III engine water pipe and twin coils. | 16th Mar 1937 | Box 6 \ 6 06-page167 | |
| Status update on the Wraith III design, noting the front suspension as the main outstanding item. | 18th Mar 1937 | Box 6 \ 6 06-page168 | |
| Status report on which vehicle sections are cleared or partially cleared for issue. | 18th Mar 1937 | Box 6 \ 6 06-page169 | |
| Status report on sections which are now cleared or partially cleared. | 3rd Mar 1937 | Box 6 \ 6 06-page170 | |
| Design status report detailing the progress on various vehicle components. | 18th Mar 1937 | Box 6 \ 6 06-page171 | |
| Status report on the progress of various design sections being detailed. | 18th Mar 1937 | Box 6 \ 6 06-page172 | |
| Progress report on various component designs not yet cleared by 'E'. | 18th Jan 1937 | Box 6 \ 6 06-page173 | |
| Status report on designs not yet cleared, detailing the progress of various sections. | 19th Mar 1937 | Box 6 \ 6 06-page174 | |
| Unsuitability of the battery terminal arrangement for the Wraith Battery Box and its impact on wiring. | 19th Mar 1937 | Box 6 \ 6 06-page175 | |
| Transmittal note listing parts sent for the Wraith III model. | 19th Mar 1937 | Box 6 \ 6 06-page176 | |
| Release of drawings LeC.5580 and LeC.5590 for the Wraith III engine test bed. | 22th Mar 1937 | Box 6 \ 6 06-page177 | |
| Part updates, releases, and status for the Wraith III model. | 22th Mar 1937 | Box 6 \ 6 06-page178 | |
| Table detailing the weights of various components for 1937 Buick vehicles across different series. | 24th Mar 1937 | Box 6 \ 6 06-page179 | |
| The Wraith III, confirming the decision to fit the existing front suspension design and requesting a revised memo. | 31th Mar 1937 | Box 6 \ 6 06-page180 | |
| List of experiments and modifications carried out on a Wraith Car, chassis 24.G.VI. | 31th Mar 1937 | Box 6 \ 6 06-page181 | |
| List of corrections and modifications made to a vehicle concerning the servo, suspension, steering, and engine mounts. | 31th Mar 1937 | Box 6 \ 6 06-page182 | |
| Instruction to manufacture specific Wraith III engine parts from Low Carbon Case Hardening Steel. | 2nd Apr 1937 | Box 6 \ 6 06-page183 | |
| Three proposed experiments to be carried out on a Wraith car frame. | 5th Apr 1937 | Box 6 \ 6 06-page184 | |
| Hand choke controls for the Wraith III model. | 15th Apr 1937 | Box 6 \ 6 06-page185 | |
| Secret memo regarding the addition of bosses to the cylinder block for Wraith III ignition engine controls. | 15th Apr 1937 | Box 6 \ 6 06-page186 | |
| Covering letter for a revised 'gold standard' specification for the Wraith III model. | 15th Apr 1937 | Box 6 \ 6 06-page187 | |
| Specification document for the Wraith III chassis, detailing changes to the engine and other components. | 15th Apr 1937 | Box 6 \ 6 06-page188 | |
| Specification sheet for various vehicle components, referencing associated instruction and schedule numbers. | 15th Apr 1937 | Box 6 \ 6 06-page189 | |
| List of instructions and modifications for various chassis and suspension components. | 15th Apr 1937 | Box 6 \ 6 06-page190 | |
| List of specifications and instructions for various vehicle components, sheet 4. | 15th Apr 1937 | Box 6 \ 6 06-page191 | |
| List of instructions and modifications for various vehicle components, sheet 5. | 15th Apr 1937 | Box 6 \ 6 06-page192 | |
| List of specifications and updates for various vehicle components and electrical systems. | 15th Apr 1937 | Box 6 \ 6 06-page193 | |
| Directive to halt material orders for the Wraith III model until a full factory cost is approved. | 16th Apr 1937 | Box 6 \ 6 06-page194 | |
| Transmittal note for drawings of the Wraith III throttle and damper governor controls. | 16th Apr 1937 | Box 6 \ 6 06-page195 | |
| Test drive report on a Wraith car, detailing its performance and identifying several objectionable features. | 1st Apr 1937 | Box 6 \ 6 06-page196 | |
| Supply of drawings and a temporary distributor solution for the Wraith III engine. | 23th Apr 1937 | Box 6 \ 6 06-page197 | |
| Secret memo regarding the deletion of serrations on Wraith III front axle pivots, rendering three machined sets obsolete. | 26th Apr 1937 | Box 6 \ 6 06-page198 | |
| Technical note detailing specifications and potential modifications for an 8-cylinder engine. | 13th May 1937 | Box 6 \ 6 06-page199 | |
| Specific parts decided upon for the construction of six Wraith III units. | 14th May 1937 | Box 6 \ 6 06-page200 | |
| Comparative table of specifications for various car engines. | 19th May 1937 | Box 6 \ 6 06-page201 | |
| Note comparing the weight of a 'Square engine' to a 'Phoenix' engine. | 19th May 1937 | Box 6 \ 6 06-page202 | |
| Comparison table of engine dimensions for various American car models. | 20th May 1937 | Box 6 \ 6 06-page203 | |
| Erection particulars for four Wraith III chassis, detailing body styles, colours and equipment. | 20th May 1937 | Box 6 \ 6 06-page204 | |
| Supply of retaining rings and bumpers for specific car models. | 20th May 1937 | Box 6 \ 6 06-page205 | |
| Specification memo detailing different configurations for an 8-cylinder engine. | 13th May 1937 | Box 6 \ 6 06-page206 | |
| Fitting of a filter on the rear X member for the Wraith III model. | 4th Jun 1937 | Box 6 \ 6 06-page207 | |
| Resume of work done on the Wraith model regarding noise complaints and subsequent modifications to the engine, suspension and other components. | 4th Jun 1937 | Box 6 \ 6 06-page208 | |
| Investigation into the causes and potential solutions for noise originating in the rear seats of a vehicle. | 4th Apr 1937 | Box 6 \ 6 06-page209 | |
| Frame stiffness experiments, comparing American cars and detailing the development and testing of the new Wraith frame. | 4th Jun 1937 | Box 6 \ 6 06-page210 | |
| Recommendation for the third Iraith car to be sent to France with a temporary engine unit. | 4th Jun 1937 | Box 6 \ 6 06-page211 | |
| Requesting a specification of parts and tests for a specific car before it enters the fitting shop. | 3rd Jun 1937 | Box 6 \ 6 06-page212 | |
| Requesting a specification of parts and tests for car 25-U-VI before it goes into the fitting shop. | 5th Jun 1937 | Box 6 \ 6 06-page213 | |
| Results of tests conducted on Wraith Car 25-C-VI to achieve 100% slow running and good idling. | 7th Jun 1937 | Box 6 \ 6 06-page214 | |
| Modifications to a Wraith straight-eight engine to achieve a 300 cubic inch displacement. | 8th Jun 1937 | Box 6 \ 6 06-page215 | |
| Electrical specifications for the Wraith III model, referencing specific parts and production changes. | 12th Jun 1937 | Box 6 \ 6 06-page216 | |
| The ineffectiveness of new type wind tone horns on the Wraith 24-G-VI model. | 14th Jun 1937 | Box 6 \ 6 06-page217 | |
| D.O. Instructions regarding the revision of the design and drawing process, using the Wraith chassis as an example. | 15th Jun 1937 | Box 6 \ 6 06-page218 | |
| Report discussing the continual revision of drawings and the challenges of implementing modifications during production, using the Wraith gearbox as an example. | 15th Jun 1937 | Box 6 \ 6 06-page219 | |
| Proposal to establish a cross-departmental committee to scrutinize and approve designs before issue, specifically for the Bentley III and Phoenix models. | 15th Jun 1937 | Box 6 \ 6 06-page220 | |
| Performance test figures comparing acceleration times for Wraith cars 24.G.VI. and 25.G.VI. | 17th Jun 1937 | Box 6 \ 6 06-page221 | |
| Specification of parts to be fitted to a Wraith Car 25.G.Vl. | 17th Jun 1937 | Box 6 \ 6 06-page222 | |
| Specification for re-lining a clutch with Ferodo material No.6777. | 17th Jun 1937 | Box 6 \ 6 06-page223 | |
| Weight comparison of valve gear components for Chevrolet and Wraith models. | 18th Jun 1937 | Box 6 \ 6 06-page224 | |
| Comparison of camshaft and tappet displacement between Chevrolet and Wraith models. | 15th Jun 1937 | Box 6 \ 6 06-page225 | |
| Comparison table of valve spring loads for a Chevrolet and a Wraith model. | 18th Jun 1937 | Box 6 \ 6 06-page226 | |
| Bench test report on the first Wraith III unit, detailing performance and camshaft issues. | 22th Jun 1937 | Box 6 \ 6 06-page227 | |
| Camshaft and piston tappet testing and modifications. | 22th Jun 1937 | Box 6 \ 6 06-page228 | |
| The performance of bottom tappets and issues with valve bounce, comparing a Chevrolet type to an existing design. | 22th Jun 1937 | Box 6 \ 6 06-page229 | |
| Engine performance tests for valve bounce, oil consumption, and oil pressure. | 1st Jun 1937 | Box 6 \ 6 06-page230 | |
| Engine performance concerning oil pressure, slow running, water temperature, and timing gears. | 2nd Jun 1937 | Box 6 \ 6 06-page231 | |
| Issues and potential modifications for timing gears, water pump, oil level indicator, carburettor, and oil pipes. | 22th Jun 1937 | Box 6 \ 6 06-page232 | |
| The necessity of a bend in an oil pipe in relation to fan clearance. | 22th Jun 1937 | Box 6 \ 6 06-page233 | |
| Graph showing power curves and losses for the Wraith III engine with different silencer and exhaust setups. | 15th Jun 1937 | Box 6 \ 6 06-page234 | |
| Performance graph showing ignition advance and detonation for the Wraith III No. 1 unit. | 19th Apr 1927 | Box 6 \ 6 06-page235 | |
| Comparative diagram of inlet and exhaust cam toe profiles, contrasting theory with practice. | 23th Jun 1937 | Box 6 \ 6 06-page236 | |
| Request to refit the standard radiator mounting and replace rubber shackles with bronze bushes on car 24-G.VI. | 23th Jun 1937 | Box 6 \ 6 06-page237 | |
| Pressure type oil filter and carburettor float chamber filter on the Wraith model. | 25th Jun 1937 | Box 6 \ 6 06-page238 | |
| List detailing the instruction status of components for the 'Wraith Straight Eight' engine. | 25th Jun 1937 | Box 6 \ 6 06-page239 | |
| Status log detailing the progress and instructions for various component parts. | 28th Jun 1937 | Box 6 \ 6 06-page240 | |
| Modifications for Wraith Chassis 24-G-VI and its scheduling for the testing programme. | 28th Jun 1937 | Box 6 \ 6 06-page241 | |
| Initial test results and identified issues with the Wraith engine unit. | 28th Jun 1937 | Box 6 \ 6 06-page242 | |
| | | | |
