| Description | Date | Identifier | |
| Experimental scheme for fitting Cadillac type rubbers to the Wraith III yoke piece lower bearing for front suspension flexibility. | 12th Apr 1937 | Box 9 \ 5 05-page051 | |
| Request for a covering order for 4 main plates for springs, previously ordered by telephone. | 12th Apr 1937 | Box 9 \ 5 05-page052 | |
| Experimental job for the front anchorage of the rear spring on the Wraith III. | 12th Apr 1937 | Box 9 \ 5 05-page053 | |
| Design improvements for the Wraith III front suspension, including the use of rubber mountings and Silentbloc bushes. | 14th Apr 1937 | Box 9 \ 5 05-page054 | |
| Page discussing transverse shivering at the rear of the frame, and tyre noises. | 14th Apr 1937 | Box 9 \ 5 05-page055 | |
| Letter to T.B. Andre & Co. Ltd. regarding the use of Silentbloc bushes for independent front wheel suspension. | 14th Apr 1937 | Box 9 \ 5 05-page056 | |
| Letter from a supplier regarding the failure and examination of laminated springs. | 15th Apr 1937 | Box 9 \ 5 05-page057 | |
| Continuation sheet of a letter from Jonas Woodhead & Sons Ltd regarding a bumper test failure on springs. | 15th Apr 1937 | Box 9 \ 5 05-page058 | |
| The Wraith III front suspension and frame, detailing the introduction of a new cross member. | 15th Apr 1937 | Box 9 \ 5 05-page059 | |
| Design modification for the Wraith III front suspension bump buffers, detailing the use of hexagon headed bolts. | 19th Apr 1937 | Box 9 \ 5 05-page060 | |
| Particulars of a top leaf for replacing a broken one on Woodhead springs. | 21th Apr 1937 | Box 9 \ 5 05-page061 | |
| Suggested modifications to the spring suspension system for the Wraith model. | 21th Apr 1937 | Box 9 \ 5 05-page062 | |
| List of suggestions and answers regarding design modifications for various components. | 21th Apr 1937 | Box 9 \ 5 05-page063 | |
| Discussion document on potential design and manufacturing alterations for components GW.740 and GW.847. | 21th Apr 1937 | Box 9 \ 5 05-page064 | |
| Modifications to the Bell Crank Lever on the Yoke Piece for the Wraith III front suspension. | 21th Apr 1937 | Box 9 \ 5 05-page065 | |
| Order of various road springs from Firths. | 1st May 1937 | Box 9 \ 5 05-page066 | |
| Request to investigate an issue with front suspension top triangular levers contacting the outer aluminium spring housing. | 4th May 1937 | Box 9 \ 5 05-page067 | |
| Internal request to order 12 silent-bloc bushes with part number E.2134. | 4th May 1937 | Box 9 \ 5 05-page068 | |
| Covering order for 2 pairs of springs for Messrs Jonas Woodhead. | 5th May 1937 | Box 9 \ 5 05-page069 | |
| Letter to a supplier regarding the poor quality of spring eyes and ordering further parts. | 5th May 1937 | Box 9 \ 5 05-page070 | |
| Requested modifications for the Wraith model's suspension and damper systems. | 6th May 1937 | Box 9 \ 5 05-page071 | |
| Trouble with Wraith rear spring rubber bushes and requesting replacements with specific diameters. | 11th May 1937 | Box 9 \ 5 05-page072 | |
| The abandoned application of a Wraith III independent front suspension to a Bentley III. | 22th May 1937 | Box 9 \ 5 05-page073 | |
| Proposed lightening modification for the Wraith Chassis front suspension housing and the suitability of materials. | 24th May 1937 | Box 9 \ 5 05-page074 | |
| Investigation into criticisms of the Wraith III rear damper suspension. | 26th May 1937 | Box 9 \ 5 05-page075 | |
| Insufficient clearance for a bolt located between the road spring and the damper arm. | 26th May 1937 | Box 9 \ 5 05-page076 | |
| Suggestions concerning the construction of the pan of the front suspension for the Wraith III. | 1st Jun 1937 | Box 9 \ 5 05-page077 | |
| Letter from British Tyre & Rubber Co. Ltd. confirming the price for 12 Rubber Bushes. | 1st May 1937 | Box 9 \ 5 05-page078 | |
| Payment for two invoices for Rubber Bushes from the British Tyre & Rubber Co. Ltd. | 1st Jun 1937 | Box 9 \ 5 05-page079 | |
| Letter to British Tyre & Rubber Co. Ltd. regarding a pricing discrepancy for rubber bushes. | 3rd Jun 1937 | Box 9 \ 5 05-page080 | |
| Fitting of 1100 lbs Firth's rear springs to car 26-G-IV. | 3rd Jun 1937 | Box 9 \ 5 05-page081 | |
| Invoices received from the British Tyre & Rubber Co. Ltd. for F.W.1055 Rubber Bushes. | 4th Jun 1937 | Box 9 \ 5 05-page082 | |
| Modifications to the Wraith III rear roll rod and shock absorber to resolve a fouling issue with the jack. | 5th Jun 1937 | Box 9 \ 5 05-page083 | |
| Letter from a supplier regarding a pricing query on an order for rubber bushes. | 7th Jun 1937 | Box 9 \ 5 05-page084 | |
| The issue of a covering order to The British Tyre & Rubber Co.Ltd. for 52 rubbers. | 9th Jun 1937 | Box 9 \ 5 05-page085 | |
| Modifications to the Wraith III front suspension, including a simplified bracing scheme and damper fitting. | 7th Jun 1937 | Box 9 \ 5 05-page086 | |
| And a sketch detailing dimensional changes and assembly instructions for a hub component. | 11th Jun 1937 | Box 9 \ 5 05-page087 | |
| Modifications to the Wraith front suspension, including replacing bearings and seals. | 11th Jun 1937 | Box 9 \ 5 05-page088 | |
| Confirming the type of springs to be fitted on a Wraith for a 15,000 miles test. | 12th Jun 1937 | Box 9 \ 5 05-page089 | |
| Use of Woodhead and Firth's rear road springs for the Wraith model. | 14th Jun 1937 | Box 9 \ 5 05-page090 | |
| Spring eye bushes and a faulty top plate to Jonas Woodhead & Sons Ltd. | 17th Jun 1937 | Box 9 \ 5 05-page091 | |
| Fitting and swapping rear road springs between vehicles 26.G.VI and 27.G.VI. | 17th Jun 1937 | Box 9 \ 5 05-page092 | |
| Letter from Jonas Woodhead & Sons awaiting confirmation to manufacture four leaves following a conversation with Mr. Leslie. | 24th Jun 1937 | Box 9 \ 5 05-page093 | |
| The inadequacy of the Wraith III front suspension rebound buffer and proposals for a solution. | 24th Jun 1937 | Box 9 \ 5 05-page094 | |
| Letter of complaint to a supplier regarding faulty spring components and undrilled oil holes. | 25th Jun 1937 | Box 9 \ 5 05-page095 | |
| The pricing, design alterations, and testing of Woodhead road springs for the Wraith model. | 26th Jun 1937 | Box 9 \ 5 05-page096 | |
| Unreliability and cost of Woodhead springs, leading to a decision to co-operate with supplier Firths. | 25th Jun 1937 | Box 9 \ 5 05-page097 | |
| Laboratory photograph showing a cross-section of a machined metal component, possibly a connecting rod big-end. | 28th Jun 1937 | Box 9 \ 5 05-page098 | |
| Letter from a supplier regarding the manufacture and replacement of back plates for springs. | 28th Jun 1937 | Box 9 \ 5 05-page099 | |
| Covering order be sent to Messrs. Woodhead & Sons Ltd. for 4 top plates. | 29th Jun 1937 | Box 9 \ 5 05-page100 | |
| Modifications to the Phantom III suspension and brakes for car 35-EX. | 5th Jul 1937 | Box 9 \ 5 05-page101 | |
| Letter from Jonas Woodhead & Sons Ltd. discussing the modification of four back plates, detailing a change from welding to drilling. | 8th Jul 1937 | Box 9 \ 5 05-page102 | |
| Dampers for a specific Bentley. | 10th Jul 1937 | Box 9 \ 5 05-page103 | |
| Letter from the Experimental Department to T.Firth & John Brown Ltd. confirming a requirement for 5 pairs of springs. | 10th Jul 1937 | Box 9 \ 5 05-page104 | |
| Letter from a supplier discussing the progress and dispatch of four back plates. | 13th Jul 1937 | Box 9 \ 5 05-page105 | |
| Letter to Messrs Thomas Firth & John Brown Ltd. regarding the supply of experimental springs and temporary centre bolts. | 15th Jul 1937 | Box 9 \ 5 05-page106 | |
| Letter to a supplier acknowledging the receipt of new top plates and providing initial positive feedback. | 15th Jul 1937 | Box 9 \ 5 05-page107 | |
| Letter to a supplier regarding the quotation and manufacture of road springs. | 3rd Aug 1937 | Box 9 \ 5 05-page108 | |
| Letter from Thos Firth & John Brown Ltd acknowledging a request for a quotation for springs. | 4th Aug 1937 | Box 9 \ 5 05-page109 | |
| Covering order for coil springs from the English Steel Corporation Ltd. | 5th Aug 1937 | Box 9 \ 5 05-page110 | |
| Continual drips from the N.S.R. spring shackle and the replacement of specific bijur feeds. | 5th Aug 1937 | Box 9 \ 5 05-page111 | |
| Letter to English Steel Corporation Ltd. requesting replacement springs. | 5th Aug 1937 | Box 9 \ 5 05-page112 | |
| Letter from English Steel Corporation Ltd. confirming a spring replacement order. | 7th Aug 1937 | Box 9 \ 5 05-page113 | |
| Secret memo regarding machining issues with Wraith III front suspension cast steel main lever housings. | 13th Aug 1937 | Box 9 \ 5 05-page114 | |
| Drawing illustrating defects in a cast metal component, showing a blow-hole and insufficient metal on a boss. | 13th Aug 1937 | Box 9 \ 5 05-page115 | |
| Cross-sectional drawing of a component with a thickness callout. | 13th Aug 1937 | Box 9 \ 5 05-page116 | |
| Photograph showing the general condition of cast steel main lever housings after final machining. | 13th Aug 1937 | Box 9 \ 5 05-page117 | |
| Photograph showing blowholes on the internal diameter of cast steel main lever housings. | 13th Aug 1937 | Box 9 \ 5 05-page118 | |
| Cast steel main lever housing that failed machining due to flange issues and blowholes. | 13th Aug 1937 | Box 9 \ 5 05-page119 | |
| Photograph showing blowholes in the bottom face of two cast steel main lever housings. | 15th Jul 1937 | Box 9 \ 5 05-page120 | |
| Cover letter from Thos Firth & John Brown Ltd. enclosing Drawing No. 210. | 15th Jul 1937 | Box 9 \ 5 05-page121 | |
| Letter from a supplier regarding the cost of simplified design rear springs. | 31th Aug 1937 | Box 9 \ 5 05-page122 | |
| Request to fit vent plugs to the front suspension for car LeC 5699. | 3rd Sep 1937 | Box 9 \ 5 05-page123 | |
| Scheme outlining modifications to the Rear Spring Pad and Suspension Bracket for the Wraith III. | 8th Sep 1937 | Box 9 \ 5 05-page124 | |
| Cost and performance of different rear road springs for the Wraith model. | 11th Sep 1937 | Box 9 \ 5 05-page125 | |
| Blueprints for a modified Yoke Piece for the Wraith front suspension. | 17th Sep 1937 | Box 9 \ 5 05-page126 | |
| Blueprints for a modified Wraith front suspension yoke piece. | 17th Sep 1937 | Box 9 \ 5 05-page127 | |
| Scheme for the Wraith III rear springs using threaded shackles and 'Duprene' washers. | 21th Sep 1937 | Box 9 \ 5 05-page128 | |
| Requesting to replace the front suspension breather with a vent plug on the Wraith model. | 28th Sep 1937 | Box 9 \ 5 05-page129 | |
| Instruction to fit new front suspension springs G.W.1716/7 to car 25-G-VI. | 29th Sep 1937 | Box 9 \ 5 05-page130 | |
| Requesting to fit a Rubber Lower Yoke Bearing to car 24-G-VI. | 29th Sep 1937 | Box 9 \ 5 05-page131 | |
| Change to 4-bolt fixings for front suspension main lever housings on the first 6 production Wraith chassis. | 12th Oct 1937 | Box 9 \ 5 05-page132 | |
| Changing the supplier for Wraith rear road springs from Firths to Woodheads for six production chassis. | 4th Nov 1938 | Box 9 \ 5 05-page133 | |
| Letter to Jonas Woodhead & Sons Ltd. ordering 6 pairs of springs and requesting a quotation for a larger quantity. | 4th Nov 1937 | Box 9 \ 5 05-page134 | |
| Letter from Jonas Woodhead & Sons regarding an order for six pairs of laminated springs and arranging a follow-up meeting. | 5th Nov 1937 | Box 9 \ 5 05-page135 | |
| Request to adjust the rear road spring shackles by adding washers to reduce side clearance. | 8th Nov 1937 | Box 9 \ 5 05-page136 | |
| Improvements to the Wraith model's front suspension and steering. | 9th Nov 1937 | Box 9 \ 5 05-page137 | |
| Letter from Jonas Woodhead & Sons Ltd. arranging a meeting to discuss rear springs. | 23th Nov 1937 | Box 9 \ 5 05-page138 | |
| Wraith rear road springs, comparing suppliers Firths and Woodheads, and outlining new specifications. | 24th Nov 1937 | Box 9 \ 5 05-page139 | |
| Data table of spring deflections for chassis types 24.G.VI. and 27.G.VI., with data from prior to November 1937. | 1st Dec 1937 | Box 9 \ 5 05-page140 | |
| Letter from Jonas Woodhead & Sons, Ltd. regarding a recent visit and the supply of laminated springs. | 1st Dec 1937 | Box 9 \ 5 05-page141 | |
| Testing methods for unground spring plates to address decarburization. | 9th Dec 1937 | Box 9 \ 5 05-page142 | |
| Letter from a supplier confirming a telephone conversation regarding the supply of laminated springs. | 11th Dec 1937 | Box 9 \ 5 05-page143 | |
| Telegram received by telephone regarding the movement of two chassis from Leeds to Derby. | 21th Dec 1937 | Box 9 \ 5 05-page144 | |
| Letter from Jonas Woodhead & Sons, Ltd. confirming the wired dispatch details for two springs. | 21th Dec 1937 | Box 9 \ 5 05-page145 | |
| Increased loads on the rubber links of the Oldsmobile front roll rod for the Wraith model. | 22th Dec 1937 | Box 9 \ 5 05-page146 | |
| Letter from Jonas Woodhead & Sons Ltd. confirming the despatch of two springs without bushes. | 22th Dec 1937 | Box 9 \ 5 05-page147 | |
| Visit to the spring manufacturer Jonas Woodhead, covering their output and manufacturing processes. | 22th Dec 1937 | Box 9 \ 5 05-page148 | |
| Page discussing the performance of ground and cadmium plated springs compared to black-bar type springs. | 23th Dec 1937 | Box 9 \ 5 05-page149 | |
| Letter from supplier Jonas Woodhead & Sons, Ltd. regarding an order for rear springs, confirming a drawing change and awaiting further details. | 23th Dec 1937 | Box 9 \ 5 05-page150 | |
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