| Description | Date | Identifier | |
| From France complaining about the poor performance of Gordon Armstrong rear dampers. | 12th Mar 1937 | Box 87 \ 3 scan0167 | |
| Adjustment of Gordon Armstrong rear dampers to prevent pitching. | 17th Mar 1937 | Box 87 \ 3 scan0168 | |
| Blueprints and required parts for a modified Bentley shock damper piston. | 1st Dec 1937 | Box 87 \ 3 scan0169 | |
| Instruction to replace a collapsed valve on Bentley shock dampers with a new part. | 20th Jan 1938 | Box 87 \ 3 scan0170 | |
| Requesting the manufacture of one set of new Bentley shock damper parts for testing rubber glands. | 12th Feb 1938 | Box 87 \ 3 scan0171 | |
| Confirming adjustments to front springs and engine positioning for clearance. | 15th Sep 1932 | Box 87 \ 4 scan0001 | |
| Increase in poundage and ordering of Front Road Springs for the Bensport (J.I. Engine). | 1st Dec 1932 | Box 87 \ 4 scan0002 | |
| The rating of Bensport road springs, with an order for a new pair with specific specifications. | 24th Jan 1933 | Box 87 \ 4 scan0003 | |
| Blueprint for front road springs for the Bensport chassis. | 2nd Feb 1933 | Box 87 \ 4 scan0004 | |
| The road springs for the Bensport car, comparing them to the Peregrine model and recommending stronger replacements. | 3rd Feb 1933 | Box 87 \ 4 scan0005 | |
| Recommendation for poundages of front and rear road springs for the Bentsport Chassis. | 10th Feb 1933 | Box 87 \ 4 scan0006 | |
| Specifying the road spring ratings for the first production Bensport cars. | 18th Mar 1933 | Box 87 \ 4 scan0007 | |
| Change in an order for 200 sets of front springs and fittings for the Bensfort Chassis. | 20th Mar 1933 | Box 87 \ 4 scan0008 | |
| Amending the quantity of road springs ordered for the Bentport chassis from 200 sets to 25. | 25th Mar 1933 | Box 87 \ 4 scan0009 | |
| Internal request for an urgent order of front road springs for the Bensport 4 chassis. | 31th Mar 1933 | Box 87 \ 4 scan0010 | |
| From Mr. Pike to Mr. Cowen discussing the performance of springing and shock absorbers on various car models. | 31th Mar 1932 | Box 87 \ 4 scan0011 | |
| Requesting a price comparison for Bentley car road springs from suppliers Woodhead and Firth's. | 3rd May 1933 | Box 87 \ 4 scan0012 | |
| Delaying instructions for Bensport road springs until a standardisation sheet is available. | 9th May 1933 | Box 87 \ 4 scan0013 | |
| The standardization of road springs for Bentley cars, advising caution due to potential heavier coachbuilt bodies. | 23th May 1933 | Box 87 \ 4 scan0014 | |
| Instruction regarding the specifications for road springs for the 3 1/2 Litre Bentley. | 3rd Jun 1933 | Box 87 \ 4 scan0015 | |
| Recommendation to increase the weight specification for Bentley rear road springs. | 7th Jun 1933 | Box 87 \ 4 scan0016 | |
| Recommendation to change the rear road springs on the 3.5 Litre Bentley. | 9th Jun 1933 | Box 87 \ 4 scan0017 | |
| Arrangements with Woodheads for Bentley Axle Springs, detailing poundages for specific sets. | 17th Oct 1933 | Box 87 \ 4 scan0018 | |
| Instructions for ordering Bentley road springs with specific poundage based on body weights. | 18th Oct 1933 | Box 87 \ 4 scan0019 | |
| Decision not to order stronger road springs for the next set of Bentley chassis. | 13th Nov 1933 | Box 87 \ 4 scan0020 | |
| Bentley road springs, vehicle weights, and test results for stronger springs. | 15th Nov 1933 | Box 87 \ 4 scan0021 | |
| Comparing the reliability of Firths springs and Woodhead springs for the Bentley car. | 9th Jan 1934 | Box 87 \ 4 scan0022 | |
| Use of Firths springs with solid forged eyes versus rolled eyes for Bentley cars. | 11th Jan 1934 | Box 87 \ 4 scan0023 | |
| Stock and allocation of Firths Bentley Road Springs. | 6th Feb 1934 | Box 87 \ 4 scan0024 | |
| Insufficient buffer spring clearance on 3 1/2 Litre Bentley front springs. | 27th Mar 1934 | Box 87 \ 4 scan0025 | |
| The Brinell hardness testing of damaged front spring leaves from a Bentley car, comparing suppliers. | 16th May 1934 | Box 87 \ 4 scan0026 | |
| The distortion of Bentley road springs under braking torque from a customer's car. | 18th May 1934 | Box 87 \ 4 scan0027 | |
| The Brinell hardness testing of Bentley front spring leaves. | 18th May 1934 | Box 87 \ 4 scan0028 | |
| Photograph of two front leaf springs after undergoing a Brinell hardness test. | 23th May 1934 | Box 87 \ 4 scan0029 | |
| Request to fit two new Firth's Front Springs to replace damaged ones on car 1-B-IV. | 23th May 1934 | Box 87 \ 4 scan0030 | |
| The distortion of Bentley road springs, detailing Brinell test figures for an experimental car. | 24th May 1934 | Box 87 \ 4 scan0031 | |
| Distortion of Bentley road springs, including Brinell hardness test results. | 24th May 1934 | Box 87 \ 4 scan0032 | |
| Comparison report on the distortion of Bentley road springs from suppliers Woodhead and Firth, detailing plate sizes and overall quality. | 25th May 1934 | Box 87 \ 4 scan0033 | |
| Comparison of plate thickness and build quality between Woodhead and Firth supplied Bentley road springs. | 25th May 1934 | Box 87 \ 4 scan0034 | |
| The results of spring distortion tests on a car. | 29th May 1934 | Box 87 \ 4 scan0035 | |
| Modifications for Bentley road springs. | 30th May 1934 | Box 87 \ 4 scan0036 | |
| Request for a report on a complaint about bent road springs and brake toggles on chassis B.29-AE. | 31th May 1934 | Box 87 \ 4 scan0037 | |
| Discussion with supplier Alfred Woodhead regarding quality issues with Bentley chassis road springs. | 1st Jun 1934 | Box 87 \ 4 scan0038 | |
| Spring plate Brinell hardness specifications, failures, and acceptable minimums. | 1st Jun 1934 | Box 87 \ 4 scan0039 | |
| Seeking clarification on whether a modification regarding clips for Bentley Chassis Woodhead Road Springs should be applied to existing cars. | 4th Jun 1934 | Box 87 \ 4 scan0040 | |
| Request to draw and order a pair of lower-rating rear road springs for a Bentley 5 car. | 25th Jul 1934 | Box 87 \ 4 scan0041 | |
| Standardisation of parts for front road springs with improved clips for Bentley vehicles. | 15th Sep 1934 | Box 87 \ 4 scan0042 | |
| Note about sourcing new parts from outside suppliers to avoid works tool costs. | 7th Nov 1934 | Box 87 \ 4 scan0043 | |
| Required road springs for Mr. Thompson's car, deferring the order until the body type is confirmed. | 7th Nov 1934 | Box 87 \ 4 scan0044 | |
| Specification for special road springs with increased initial camber for chassis B-10-DG. | 3rd Dec 1934 | Box 87 \ 4 scan0045 | |
| Order for two low rating front springs for a specific car. | 4th Dec 1934 | Box 87 \ 4 scan0046 | |
| Letter to Thomas Firth & John Brown Ltd. requesting a blueprint and information on lighter Bentley axle road springs to save weight. | 17th Jan 1935 | Box 87 \ 4 scan0047 | |
| Letter to a supplier regarding the design and weight of Bentley road springs, comparing a proposed version to an existing one. | 7th Feb 1935 | Box 87 \ 4 scan0048 | |
| Letter from a supplier discussing the specifications and delivery of special front springs. | 6th Feb 1935 | Box 87 \ 4 scan0049 | |
| Letter from Thos. Firth & John Brown Ltd. concerning the manufacture and specifications of special front springs. | 6th Feb 1935 | Box 87 \ 4 scan0050 | |
| Letter from Thos Firth & John Brown Ltd concerning the production and delivery of Bentley springs and enclosing blueprints. | 8th Feb 1935 | Box 87 \ 4 scan0051 | |
| Letter to T. Firth & John Brown Ltd. regarding the production and testing of springs based on blueprints 122 and 123. | 12th Feb 1935 | Box 87 \ 4 scan0052 | |
| Request to issue an order to Messrs. Thos. Firth & John Brown Ltd. for two car sets of road springs. | 12th Feb 1935 | Box 87 \ 4 scan0053 | |
| Instructions for refitting a lightened type of road springs to a Bentley Chassis. | 28th Feb 1935 | Box 87 \ 4 scan0054 | |
| Blueprint with suggestions for the lightest possible front and rear springs for a Bentley car. | 29th Jan 1935 | Box 87 \ 4 scan0055 | |
| Letter concerning the modification and creation of experimental springs for a Bentley car. | 9th Mar 1935 | Box 87 \ 4 scan0056 | |
| Letter from Thos Firth & John Brown Ltd regarding modifications to experimental 4-plate Bentley front springs, enclosing blueprint No.122.A. | 11th Mar 1935 | Box 87 \ 4 scan0057 | |
| Letter to Messrs. T. Firth & John Brown Ltd. requesting stress figures for springs 121, 122, and 123. | 11th Mar 1935 | Box 87 \ 4 scan0058 | |
| Requesting an order to be issued to Firths for road springs and to cover alterations to existing springs. | 14th Mar 1935 | Box 87 \ 4 scan0059 | |
| Letter from Thos Firth & John Brown Ltd detailing stress tests on experimental springs for a Bentley car. | 12th Mar 1935 | Box 87 \ 4 scan0060 | |
| Letter regarding the failure of experimental springs for a Bentley car and their free-of-charge replacement. | 15th Mar 1935 | Box 87 \ 4 scan0061 | |
| Letter to T. Firth & J. Brown Ltd. regarding a fractured spring and a request for the broken parts. | 20th Mar 1935 | Box 87 \ 4 scan0062 | |
| Blueprint for a special 40/50 front spring with 17 plates. | 6th Feb 1935 | Box 87 \ 4 scan0063 | |
| Letter concerning the dispatch of a broken 4-Plate Spring for examination. | 21th Mar 1935 | Box 87 \ 4 scan0064 | |
| Bentley V road springs, clarifying that new 122A springs from Firths do not require plate changes. | 25th Mar 1935 | Box 87 \ 4 scan0065 | |
| Replacement and alteration of front and rear springs for a Bentley V. | 25th Mar 1935 | Box 87 \ 4 scan0066 | |
| Order for a set of Bentley road springs to Firth's drawing 122A. | 28th Mar 1935 | Box 87 \ 4 scan0067 | |
| Alterations to the front springs and fittings for a Bentley Chassis. | 29th Mar 1935 | Box 87 \ 4 scan0068 | |
| Complaints of harsh riding in Bentley cars at low speeds by reducing shock damper poundage. | 25th Apr 1935 | Box 87 \ 4 scan0069 | |
| The inadequacy of rear springs on Bentley chassis due to increasing vehicle weights. | 29th Apr 1935 | Box 87 \ 4 scan0070 | |
| Letter to a supplier regarding the failure of road spring plates during testing and proposals for improvement. | 1st May 1935 | Box 87 \ 4 scan0071 | |
| Sending 4 broken spring plates for despatch to Thomas Firth & John Brown Ltd. | 2nd May 1935 | Box 87 \ 4 scan0072 | |
| Suggestions for lightest front and rear springs for a Bentley car. | 25th Jan 1935 | Box 87 \ 4 scan0073 | |
| Letter to Thomas Firth & John Brown Ltd. regarding the positioning of spring clips for Bentley springs. | 3rd May 1935 | Box 87 \ 4 scan0074 | |
| Page two of a letter detailing clip positions on a rear end and requesting criticisms. | 3rd May 1935 | Box 87 \ 4 scan0075 | |
| Request to urgently order two sets of modified Bentley road springs from Firths, based on blueprint FB.2171. | 16th May 1935 | Box 87 \ 4 scan0076 | |
| To Mr. Clarke arranging a visit to test a Bentley fitted with new dampers and discuss springing/shock absorbers. | 17th May 1935 | Box 87 \ 4 scan0077 | |
| Confirmation letter regarding an order for a set of 4 Plate Bentley Springs to drawing No.122.A, with altered clip centres. | 17th May 1935 | Box 87 \ 4 scan0078 | |
| Fitting modified shock dampers to chassis B.158.DG to address a customer complaint of harsh springing. | 20th May 1935 | Box 87 \ 4 scan0079 | |
| Explaining the effects of front spring anchoring on steering joggling in a Bentley. | 28th Jun 1935 | Box 87 \ 4 scan0080 | |
| Axle control, suspension geometry, and its effect on steering and rebound. | 16th Sep 1935 | Box 87 \ 4 scan0081 | |
| Request to supplier Thos. Firth & John Brown Ltd. for a further set of road springs and a new set of special Bentley springs with detailed specifications. | 16th Sep 1935 | Box 87 \ 4 scan0082 | |
| Letter confirming the order for two sets of 25 HP Bentley springs and offering drawings if required. | 16th Sep 1935 | Box 87 \ 4 scan0083 | |
| Request to order special 25 HP road springs and special Bentley springs from Firths. | 16th Sep 1935 | Box 87 \ 4 scan0084 | |
| Letter from a supplier confirming an order for two sets of springs has been put in hand for delivery. | 18th Sep 1935 | Box 87 \ 4 scan0085 | |
| Letter to supplier Thos. Firth & John Brown Ltd. chasing an overdue order for car springs. | 7th Oct 1935 | Box 87 \ 4 scan0086 | |
| Letter from a supplier confirming the delivery date for two sets of springs. | 9th Oct 1935 | Box 87 \ 4 scan0087 | |
| Letter to a supplier regarding the delivery and ordering of car springs. | 10th Oct 1935 | Box 87 \ 4 scan0088 | |
| To Roy requesting a covering order for 3 car sets of springs from Thos. Firth. | 10th Oct 1935 | Box 87 \ 4 scan0089 | |
| Letter from Thos Firth & John Brown Ltd regarding alterations and delivery of Special Bentley Springs. | 11th Oct 1935 | Box 87 \ 4 scan0090 | |
| Specification sheet for special front and rear spring plates, detailing their thicknesses in inches. | 16th Sep 1935 | Box 87 \ 4 scan0091 | |
| Instruction to produce and despatch special jacking pads for newly ordered lightened Bentley road springs. | 14th Oct 1935 | Box 87 \ 4 scan0092 | |
| Choice between Dubonnet and wishbone suspension systems for future models. | 18th Nov 1935 | Box 87 \ 4 scan0093 | |
| Design and layout of a torsion bar suspension system, referencing Citroen and Chenard-Walker designs. | 18th Nov 1935 | Box 87 \ 4 scan0094 | |
| Suspension scheme's advantages over American wishbone or Dubonnet types. | 19th Nov 1935 | Box 87 \ 4 scan0095 | |
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