| Description | Date | Identifier | |
| Instructions for fitting alternative engine mountings to Wraith car 26-G-VI to test for steering column shake. | 7th Oct 1937 | Box 8 \ 7 07-page46 | |
| Modification to the engine rear suspension for the Wraith III model. | 26th Oct 1937 | Box 8 \ 7 07-page47 | |
| Requesting instructions to issue a covering order for an invoice for verbally ordered rubber blocks. | 29th Oct 1937 | Box 8 \ 7 07-page48 | |
| Request to place an official order for two rubber blocks to be used for experimental engine mountings. | 2nd Nov 1937 | Box 8 \ 7 07-page49 | |
| Modifications for Wraith car 24.G.VI in the fitting shop. | 10th Nov 1937 | Box 8 \ 7 07-page50 | |
| Letter from British Tyre & Rubber Co. Ltd. concerning a delivery delay for metal parts FW.1410 and FW.1411. | 10th Nov 1937 | Box 8 \ 7 07-page51 | |
| Rough sketch for a front high engine mounting on the Wraith III. | 29th Nov 1937 | Box 8 \ 7 07-page52 | |
| Changes to the engine mounting for the Wraith III model. | 30th Nov 1937 | Box 8 \ 7 07-page53 | |
| Design memorandum for the Wraith III high front engine mounting with an offset nose. | 1st Dec 1937 | Box 8 \ 7 07-page54 | |
| Temporary scheme for a Torque Reaction Damper for the Wraith III with high front engine mounting. | 9th Dec 1937 | Box 8 \ 7 07-page55 | |
| Wraith III rear engine mounting and a modification to a cross member. | 20th Dec 1937 | Box 8 \ 7 07-page56 | |
| The decision for a raised engine mounting on the Wraith model. | 12th Jan 1938 | Box 8 \ 7 07-page57 | |
| Modifications to the Wraith Crankcase, including the removal of front engine feet. | 14th Jan 1938 | Box 8 \ 7 07-page58 | |
| Schemes for pipes and wiring for the Wraith III model. | 18th Jan 1938 | Box 8 \ 7 07-page59 | |
| The deletion of crankcase facings for front engine supports on Wraith III and Bentley III engines. | 18th Jan 1938 | Box 8 \ 7 07-page60 | |
| Request to place an official order for four rubber blocks from British Tyre & Rubber Co. Ltd. | 19th Feb 1938 | Box 8 \ 7 07-page61 | |
| Letter confirming the prices for two different specifications of rubber blocks. | 26th Feb 1938 | Box 8 \ 7 07-page62 | |
| Contents note for four rubber blocks following verbal instructions from Mr. Whyman. | 2nd Mar 1938 | Box 8 \ 7 07-page63 | |
| Contents note for a verbal order of four rubber blocks. | 3rd Mar 1937 | Box 8 \ 7 07-page64 | |
| Request to send an official order to the British Tyre & Rubber Co. Ltd. for four rubber blocks. | 4th Mar 1938 | Box 8 \ 7 07-page65 | |
| Requesting an order for more rubber blocks and confirming others have been despatched for testing. | 8th Mar 1938 | Box 8 \ 7 07-page66 | |
| Completed design modifications for the Wraith III rear engine suspension. | 10th Mar 1938 | Box 8 \ 7 07-page67 | |
| Dimensions and required modifications for the Wraith III front engine support rubbers. | 16th Mar 1938 | Box 8 \ 7 07-page68 | |
| Requesting an official order for four rubber blocks previously ordered by telephone. | 20th Apr 1938 | Box 8 \ 7 07-page69 | |
| Improvements to the Wraith engine mounting by using more rubber to increase smoothness. | 25th May 1938 | Box 8 \ 7 07-page70 | |
| Notification regarding a blueprint for rubbers of increased thickness for the Wraith III chassis rear engine mounting. | 31th May 1938 | Box 8 \ 7 07-page71 | |
| Experimental thicker torque rubbers for the Wraith III chassis rear engine mounting. | 8th Jun 1938 | Box 8 \ 7 07-page72 | |
| Experimental modification to the Wraith III front engine mounting using more rubber. | 15th Jun 1938 | Box 8 \ 7 07-page73 | |
| Requesting the preparation of parts for a Wraith III front engine mounting modification. | 16th Jun 1938 | Box 8 \ 7 07-page74 | |
| Increase in thickness for the front engine mounting retaining plate on Wraith III and Bentley III cars. | 21th Jun 1938 | Box 8 \ 7 07-page75 | |
| The failure of mild steel exhaust pipes, requesting an examination of a sample to find a more durable material. | 27th Jun 1938 | Box 8 \ 7 07-page76 | |
| Request to send an official order to the British Tyre & Rubber Co. Ltd for stripping and re-rubbering torque rubbers. | 27th Jun 1938 | Box 8 \ 7 07-page77 | |
| Request to send an official order for two rubber blocks to The British Tyre & Rubber Co. Ltd. | 13th Jul 1938 | Box 8 \ 7 07-page78 | |
| Approving the use of tested rear engine mounting torque rubbers for the Wraith model production cars. | 14th Jul 1938 | Box 8 \ 7 07-page79 | |
| Technical memo discussing experimental low single point front engine mounting designs for the Wraith III car. | 25th Aug 1938 | Box 8 \ 7 07-page80 | |
| Request to detail and instruct the parts needed for an experiment on welded sheet metal brackets for rear torque rubbers. | 25th Aug 1938 | Box 8 \ 7 07-page81 | |
| Request to prepare parts for the Wraith III engine mounting. | 2nd Sep 1938 | Box 8 \ 7 07-page82 | |
| Proposed material changes for the front engine support brackets on the Wraith III and Bentley 111 models. | 3rd Nov 1938 | Box 8 \ 7 07-page83 | |
| Material and cost increase for Wraith III and Bentley III front engine support brackets. | 4th Nov 1938 | Box 8 \ 7 07-page84 | |
| Modifications for fitting a Wraith gear and engine rear suspension into a B.V. chassis. | 23th Dec 1938 | Box 8 \ 7 07-page85 | |
| Request to prepare one set of parts for an engine rear suspension for a Wraith Gear in a B.V. chassis. | 17th Jan 1939 | Box 8 \ 7 07-page86 | |
| Request to prepare and fit three sets of a new torque re-action scheme on Wraith cars. | 4th Mar 1939 | Box 8 \ 7 07-page87 | |
| Wraith II exhaust system and low-pressure oil pipe components. | 9th Jul 1936 | Box 8 \ 8 08-page01 | |
| The surface area required for exhaust system parts on the Wraith Chassis. | 9th Jan 1937 | Box 8 \ 8 08-page02 | |
| Request to fabricate a 'trouser piece' for an experimental Wraith exhaust system. | 10th Feb 1937 | Box 8 \ 8 08-page03 | |
| Request to fabricate a tail pipe and alter the swan neck pipe for a Wraith exhaust system. | 6th Mar 1937 | Box 8 \ 8 08-page04 | |
| Request to fabricate a baffle and a nose piece for the Wraith exhaust system. | 2nd Apr 1937 | Box 8 \ 8 08-page05 | |
| Request to fabricate and fit exhaust system components to a Wraith 24-G-VI for testing. | 16th Apr 1937 | Box 8 \ 8 08-page06 | |
| Requesting the build and fitment of a new standard silencer and tailpipe for comparative purposes. | 30th Apr 1937 | Box 8 \ 8 08-page07 | |
| Redesigned exhaust suspension for the Wraith III chassis. | 28th Jun 1937 | Box 8 \ 8 08-page08 | |
| Request to prepare and fit exhaust suspension parts for the Wraith III 10,000 miles car. | 29th Jun 1937 | Box 8 \ 8 08-page09 | |
| Request to build a nickel-plated exhaust system for a Wraith III car due to the short lifespan of the existing mild steel system. | 9th Jul 1937 | Box 8 \ 8 08-page10 | |
| Addition of a stay to the Wraith III exhaust system's forward expansion box. | 9th Jul 1937 | Box 8 \ 8 08-page11 | |
| The repair and ongoing issues with the exhaust system stays on a Wraith model. | 28th Jul 1937 | Box 8 \ 8 08-page12 | |
| Instruction memo regarding experimental alterations to the Wraith III car's exhaust system. | 18th Aug 1938 | Box 8 \ 8 08-page13 | |
| Weight reduction for the Wraith III exhaust system. | 7th Sep 1937 | Box 8 \ 8 08-page14 | |
| Specification sheet for exhaust system components, detailing their diameters and material gauges. | 7th Sep 1937 | Box 8 \ 8 08-page15 | |
| New welded construction method for Wraith III exhaust fittings. | 2nd Oct 1937 | Box 8 \ 8 08-page16 | |
| Instructions for fitting a lightened Wraith III exhaust system and preparing a similar system with nickel plating. | 15th Oct 1937 | Box 8 \ 8 08-page17 | |
| List of tracings for Wraith III Chassis exhaust fittings. | 16th Oct 1937 | Box 8 \ 8 08-page18 | |
| List of exhaust system components with an instruction for production of 6 sets. | 16th Oct 1937 | Box 8 \ 8 08-page19 | |
| Request to lag the standard exhaust system for a Wraith car, model 24-G-VI, so it can be re-fitted. | 3rd Nov 1937 | Box 8 \ 8 08-page20 | |
| Collapse of the Wraith's rubber exhaust system suspension and fitting an alternative. | 8th Nov 1937 | Box 8 \ 8 08-page21 | |
| Alternative methods of insulated supports for the Wraith III exhaust system. | 8th Nov 1937 | Box 8 \ 8 08-page22 | |
| New tail-pipe for car 24.G.Vl and a Hardy Spicer propeller shaft for car 25.O.Vl. | 15th Nov 1937 | Box 8 \ 8 08-page23 | |
| Modifications to the clamped joints for the Wraith III exhaust system. | 17th Nov 1937 | Box 8 \ 8 08-page24 | |
| Modification to holes in the chassis frame cruciform to provide clearance for exhaust pipes on the Wraith III model. | 29th Nov 1937 | Box 8 \ 8 08-page25 | |
| Fitting of 'Corrojoint' washers to the exhaust systems of Wraith experimental chassis. | 15th Dec 1937 | Box 8 \ 8 08-page26 | |
| Issues with Phantom III exhaust manifold washers and proposing the use of 'Corrojoint' washers as a solution. | 11th Dec 1937 | Box 8 \ 8 08-page27 | |
| Request to detail and instruct on parts for clamped joints for the Wraith III exhaust system. | 15th Dec 1937 | Box 8 \ 8 08-page28 | |
| List of new tracings for Wraith III Chassis exhaust fittings, to be instructed for 6 sets. | 29th Dec 1937 | Box 8 \ 8 08-page29 | |
| Updated instructions and parts for Wraith III Chassis exhaust fittings. | 31th Dec 1937 | Box 8 \ 8 08-page30 | |
| Proposed modification to the Wraith exhaust system's rear silencer. | 14th Feb 1938 | Box 8 \ 8 08-page31 | |
| Parts list regarding the deletion of sliding joints on the Wraith III chassis exhaust fittings. | 18th Feb 1938 | Box 8 \ 8 08-page32 | |
| The failure of a mild steel exhaust downtake pipe for the Wraith model, instructing a change to staybrite steel and inquiring about other suitable materials. | 5th Mar 1938 | Box 8 \ 8 08-page33 | |
| Whistling noise from the exhaust systems on Wraith cars 24.G.VI & 29.G.VI. | 18th Mar 1938 | Box 8 \ 8 08-page34 | |
| Modifications to the exhaust manifold for the Wraith III and Bentley III models. | 18th Mar 1938 | Box 8 \ 8 08-page35 | |
| Requesting the manufacture of a mild steel Wraith exhaust system for special treatment by Follsain Co. | 22th Mar 1938 | Box 8 \ 8 08-page36 | |
| Instruction to modify and fit an exhaust manifold for a Wraith III. | 25th Mar 1938 | Box 8 \ 8 08-page37 | |
| Buckling issue with the Wraith Exhaust System stay and suggesting a tubular replacement. | 28th Apr 1938 | Box 8 \ 8 08-page38 | |
| Confirming the production instruction for the Wraith exhaust manifold pipe EW.1789. | 3rd May 1938 | Box 8 \ 8 08-page39 | |
| Whistles in the Wraith exhaust system due to a shortened rear silencer. | 5th May 1938 | Box 8 \ 8 08-page40 | |
| Distorted intermediate exhaust pipe and an internal rattle in the rear silencer on a Wraith car. | 12th May 1938 | Box 8 \ 8 08-page41 | |
| Request to fit a pair of SS Jaguar exhaust silencers to a Wraith car using a temporary manifold. | 25th May 1938 | Box 8 \ 8 08-page42 | |
| Modifications to the Wraith III exhaust fittings, specifically the intermediate pipe and stays. | 27th May 1938 | Box 8 \ 8 08-page43 | |
| Analysis of Brake Horsepower (BHP) losses from the exhaust system of a Wraith III No.4 unit. | 18th Jun 1938 | Box 8 \ 8 08-page44 | |
| Table of B.HP and power loss figures for different exhaust system configurations at 3,500 R.P.M. | 18th Jun 1938 | Box 8 \ 8 08-page45 | |
| Performance table comparing Brake Horsepower (B.HP) and Loss for various exhaust system configurations at 4,000 R.P.M. | 22th Jun 1938 | Box 8 \ 8 08-page46 | |
| Letter regarding the dispatch of a 25/30 HP chassis exhaust system layout and an inquiry about the progress on a Bentley silencer. | 22th Jun 1938 | Box 8 \ 8 08-page47 | |
| Confirming a material change for the Wraith exhaust system components to staybright steel. | 23th Jun 1938 | Box 8 \ 8 08-page48 | |
| Request to repair a Wraith exhaust manifold and weld the front expansion box. | 23th Jun 1938 | Box 8 \ 8 08-page49 | |
| Letter regarding a missing 25/30 HP chassis exhaust lay-out print and the dispatch of a preliminary silencer, reference X.422, for a Bentley chassis. | 23th Jun 1938 | Box 8 \ 8 08-page50 | |
| Letter to Burgess Products Ltd. regarding a confidential print, a previously misaddressed correspondence, and a Bentley silencer. | 24th Jun 1938 | Box 8 \ 8 08-page51 | |
| Letter confirming the arrival of a silencer for a Bentley, which will be fitted and tested. | 27th Jun 1938 | Box 8 \ 8 08-page52 | |
| Letter from Burgess Products requesting engine specifications for the design of an experimental exhaust system. | 27th Jun 1938 | Box 8 \ 8 08-page53 | |
| Letter from the Experimental Department to Burgess Products Co. Ltd. detailing engine specifications. | 29th Jun 1938 | Box 8 \ 8 08-page54 | |
| Request to manufacture a tail pipe and downtake pipe for a Wraith exhaust system. | 11th Jul 1938 | Box 8 \ 8 08-page55 | |
| Required work on a Wraith car, including the exhaust, a new clutch lining, and suspension/steering adjustments. | 16th Jul 1938 | Box 8 \ 8 08-page56 | |
| Request to fabricate and fit an exhaust system for a Wraith, chassis 26.G.VI. | 19th Jul 1938 | Box 8 \ 8 08-page57 | |
| Experiments to develop a new, quieter, and more efficient exhaust system for the Wraith III car to reduce BHP loss. | 18th Jun 1938 | Box 8 \ 8 08-page58 | |
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