| Description | Date | Identifier | |
| Failure of rear springs on a Goshawk 11 car after 14,700 miles. | 14th Sep 1922 | Box 49 \ 3 Scan154 | |
| Weight specifications and spring adjustments for Goshawk cars. | 18th Sep 1922 | Box 49 \ 3 Scan155 | |
| Performance and suspension of the No. 6 Goshawk car. | 10th Sep 1922 | Box 49 \ 3 Scan156 | |
| Imperfect springing on Goshawk models and the potential damage to the company's reputation. | 9th Oct 1922 | Box 49 \ 3 Scan157 | |
| The delivery of four pairs of modified front road springs for fatigue testing. | 16th Oct 1922 | Box 49 \ 3 Scan158 | |
| Order for two sets of experimental front road springs for the Goshawk II model. | 28th Aug 1922 | Box 49 \ 3 Scan159 | |
| Options for front spring arrangement in conjunction with steering and front wheel brakes. | 23th Oct 1922 | Box 49 \ 3 Scan160 | |
| Weight limits and spring specifications for the Goshawk car. | 5th Oct 1922 | Box 49 \ 3 Scan161 | |
| Importance of weight saving on the chassis, which is negated by heavy bodies and accessories. | 5th Oct 1922 | Box 49 \ 3 Scan162 | |
| List of chassis spares with their corresponding weights for front, rear, and total. | 1st Jun 1922 | Box 49 \ 3 Scan163 | |
| The weight distribution calculations for car bodies and passengers. | 1st Jun 1922 | Box 49 \ 3 Scan164 | |
| Weight distribution analysis for maximum and minimum car configurations, detailing front, rear, and total loads in pounds. | 1st Jun 1922 | Box 49 \ 3 Scan165 | |
| Calculations for car springing, including maximum and minimum loads and proposed spring ranges. | 23th Oct 1922 | Box 49 \ 3 Scan166 | |
| Improvements and stock levels for road springs on the 40/50 and Goshawk models. | 23th Oct 1922 | Box 49 \ 3 Scan167 | |
| Potential design improvements for spring shackles, including using tight bushes with deep flanges. | 4th Dec 1922 | Box 49 \ 3 Scan168 | |
| The performance of C.H.N.S. bushes in spring shackles, detailing wear issues and suggestions for improvement. | 4th Dec 1922 | Box 49 \ 3 Scan169 | |
| Recommendation to revert to fixed bushes for springs on 20 HP models due to wear on floating bushes. | 1st Dec 1922 | Box 49 \ 3 Scan170 | |
| Standardisation of chassis parts for Goshawk, specifically fixed bushes for spring eyes. | 8th Dec 1922 | Box 49 \ 3 Scan171 | |
| Standardisation sheet awaiting the cost for fixed bushes for spring eyes. | 9th Jan 1923 | Box 49 \ 3 Scan172 | |
| Standardisation of fixed bushes for spring eyes on the Goshawk chassis. | 8th Dec 1922 | Box 49 \ 3 Scan173 | |
| Standardisation of fixed bushes for spring eyes on the Goshawk model to prevent wear. | 8th Dec 1922 | Box 49 \ 3 Scan174 | |
| Adopting a flanged bush for springs on a 20 HP model and clarifying wear measurements. | 13th Dec 1922 | Box 49 \ 3 Scan175 | |
| Delays in approving standardisation sheets and the urgent need to test new fixed bushes on the Goshawk. | 8th Jan 1923 | Box 49 \ 3 Scan176 | |
| Request from Mr. Royce for information and testing on the effects of torsion and side bending in road springs. | 27th Jan 1923 | Box 49 \ 3 Scan177 | |
| Calculations and specifications for Goshawk chassis springing. | 6th Mar 1923 | Box 49 \ 3 Scan178 | |
| Spring weight calculations and specifications based on weight distribution. | 19th Jul 1917 | Box 49 \ 3 Scan179 | |
| Spring requirements for the 20HP chassis, proposing changes to the standard springs used. | 1st May 1923 | Box 49 \ 3 Scan180 | |
| Modifications to the Goshawk 11 front radius rod system, including shackles and springs. | 23th Mar 1923 | Box 49 \ 3 Scan181 | |
| Spring options for the flexible steering joint on a 20 HP model with front axle radius rods. | 27th Mar 1923 | Box 49 \ 3 Scan182 | |
| Cover letter forwarding correspondence about the Nicholls 20 HP Trials Car and requesting information on spring specifications. | 19th Apr 1923 | Box 49 \ 3 Scan183 | |
| Letter discussing the incorrect springs fitted to a 20 HP Trials Touring Car and seeking an opinion on their suitability. | 10th Apr 1923 | Box 49 \ 3 Scan184 | |
| Letter from Hooper & Co. Ltd. discussing the suspension performance on a 20 HP Trials Touring Car. | 13th Apr 1923 | Box 49 \ 3 Scan185 | |
| Spring specifications for a 20-HP Trials Car, chassis 46-G6. | 20th Apr 1923 | Box 49 \ 3 Scan186 | |
| 9,500-mile test comparing the wear of casehardened bushes versus bronze bushes for spring shackles on a Goshawk-11. | 16th May 1923 | Box 49 \ 3 Scan187 | |
| Pair of broken front springs returned from a 20-HP car, chassis 41-G-3. | 24th Oct 1923 | Box 49 \ 3 Scan188 | |
| Following up on a report from Madrid about broken front springs on a 20-HP Chassis trials car. | 9th Nov 1923 | Box 49 \ 3 Scan189 | |
| 20-HP Springs, forwarding a copy of another memo for a reply. | 21th Nov 1923 | Box 49 \ 3 Scan190 | |
| Complaint from Madrid about broken front springs on a 20-HP car. | 3rd Dec 1923 | Box 49 \ 3 Scan191 | |
| Decision to supply Mr Royce's car with 45' springs instead of the unequal ended springs. | 6th Feb 1934 | Box 49 \ 3 Scan192 | |
| Suspension setup for 20-HP cars due to complaints of them being under-sprung in France. | 1st Feb 1924 | Box 49 \ 3 Scan193 | |
| The concluding page of a typed memo seeking an opinion on a compromise. | 11th Feb 1924 | Box 49 \ 3 Scan194 | |
| Springing philosophy and compromise for the 20 HP Chassis. | 12th Feb 1924 | Box 49 \ 3 Scan195 | |
| The effects of stiffer front springs on vehicle ride quality. | 27th Feb 1924 | Box 49 \ 3 Scan196 | |
| Customer acceptance of ride comfort changes due to the addition of front brakes. | 1st Mar 1924 | Box 49 \ 3 Scan197 | |
| Responding to queries on a standardisation sheet regarding spring stiffness and modifications for front wheel brakes. | 1st Mar 1924 | Box 49 \ 3 Scan198 | |
| Standardisation of road springs for 40/50 HP and 20 HP models to suit bad roads abroad. | 22th Jan 1924 | Box 49 \ 3 Scan199 | |
| With remarks on the standardisation of chassis parts, specifically springs, camber and buffers. | 2nd Jan 1923 | Box 49 \ 3 Scan200 | |
| Complaints of squeaking springs on the 20HP model and potential solutions. | 19th Nov 1924 | Box 49 \ 3 Scan201 | |
| Potential trouble with 20HP springs following an inspection report. | 12th Nov 1924 | Box 49 \ 3 Scan202 | |
| Examining broken front springs on a 20 HP car and recommending improvements for the springs and rear brakes. | 27th Nov 1924 | Box 49 \ 3 Scan203 | |
| Typed report discussing scored rear brake drums and wear on 4-wheel brake systems compared to 2-wheel systems. | 15th Jan 1925 | Box 49 \ 3 Scan204 | |
| Reliability of front springs on the 20 HP model, potential modifications, and a 10,000-mile failure target. | 15th Jan 1925 | Box 49 \ 3 Scan205 | |
| Complaints of spring squeaks on 20-HP cars and a proposed solution with leather extensions to the gaiters. | 28th Jan 1925 | Box 49 \ 3 Scan206 | |
| Comparative testing of new front springs from Firths' design for the 20 HP model. | 3rd Feb 1925 | Box 49 \ 3 Scan207 | |
| Issue with the bore size of spring eyes on 650 lbs springs supplied by Firth & Sons Ltd for a pumping test. | 2nd Feb 1925 | Box 49 \ 3 Scan208 | |
| The testing of 20 HP road springs supplied by Messrs. Firths. | 14th Mar 1925 | Box 49 \ 3 Scan209 | |
| Visit to supplier Thos. Firth & Sons Ltd. regarding failures and design issues with 20 HP road springs. | 18th Mar 1925 | Box 49 \ 3 Scan210 | |
| The testing, examination, and modification of 20 HP road springs. | 19th Mar 1925 | Box 49 \ 3 Scan211 | |
| The widespread breakage of front springs on 20 HP Pre-F.W.B. models and a proposed solution. | 27th Jun 1928 | Box 49 \ 3 Scan212 | |
| Outlining the policy for replacing broken car springs under different circumstances. | 27th Jun 1928 | Box 49 \ 3 Scan213 | |
| Replacement and modification of front road springs on 20 HP G2 models. | 18th Sep 1928 | Box 49 \ 3 Scan214 | |
| Modification of 20HP front road springs to mitigate a £10,000 financial loss. | 19th Sep 1928 | Box 49 \ 3 Scan215 | |
| Proposed design for the Goshawk petrol tank, including capacity, fittings, and required chassis modifications. | 30th Nov 1920 | Box 49 \ 3 Scan216 | |
| Titled 'Goshawk Petrol Tank' detailing modifications to the Goshawk exhaust system and related rear components, referencing schemes 644 and 730. | 20th Jan 1921 | Box 49 \ 3 Scan217 | |
| The fitting of a temporary Simms petrol gauge to the Goshawk I petrol tank. | 20th Apr 1921 | Box 49 \ 3 Scan218 | |
| Modifications to the Goshawk II petrol system and its level indicator. | 1st Feb 1922 | Box 49 \ 3 Scan219 | |
| Proposed modifications to a fuel tank design, referencing Scheme 739 and Figure 2. | 31th Jan 1921 | Box 49 \ 3 Scan220 | |
| Drawing LeC.1367 for the 'Goshawk II' petrol tank, including a proposed size increase. | 17th Mar 1921 | Box 49 \ 3 Scan221 | |
| Drawing Lec.1370 for the 'Goshawk II' Petrol Tank, confirming a decision by Mr. Royce on the manufacturing pattern. | 3rd Mar 1921 | Box 49 \ 3 Scan222 | |
| Drawings for the Goshawk II's petrol tank and spare wheel carrier, and the temporary fitting of a petrol level indicator. | 11th Apr 1921 | Box 49 \ 3 Scan223 | |
| Distributing prints for the Goshawk II petrol tank and spare wheel carrier, noting outstanding work. | 11th Apr 1921 | Box 49 \ 3 Scan224 | |
| The position of the No. 2 rear cross member and spare wheel for the Goshawk 11 model. | 3rd May 1921 | Box 49 \ 3 Scan225 | |
| The modification of the 'Goshawk 11' petrol tanks. | 22th Jun 1921 | Box 49 \ 3 Scan226 | |
| Revisions to the Goshawk 11 spare wheel carrier, petrol tank, filler, and filler cap. | 9th Jul 1921 | Box 49 \ 3 Scan227 | |
| Distribution memo for blueprints of the Goshawk 11 revised spare wheel carrier, petrol tank, petrol filler, and filler cap. | 12th Jul 1921 | Box 49 \ 3 Scan228 | |
| Issues with the petrol tank, spring drive, and radiator on the Goshawk 11. | 1st Sep 1921 | Box 49 \ 3 Scan229 | |
| Modifications to the Goshawk 11 petrol tank and brake levers for improved clearance. | 19th Sep 1921 | Box 49 \ 3 Scan230 | |
| Petrol tap for a 20 HP model with a vacuum tank. | 1st Oct 1921 | Box 49 \ 3 Scan231 | |
| Position of pedals for B and D steering configurations on the Goshawk 11 model. | 19th Dec 1921 | Box 49 \ 3 Scan232 | |
| Spare wheel placement, luggage carriers, and wheel options like Rudge Whitworth or Dunlop for the 'Swallow' model. | 19th Dec 1921 | Box 49 \ 3 Scan233 | |
| Troubleshooting of petrol filter blockages caused by fine silt on a Goshawk-11 carburetter. | 19th Apr 1922 | Box 49 \ 3 Scan234 | |
| Treatment and testing of petrol-resistant coatings for cork floats on the 'Goshawk' project. | 1st May 1922 | Box 49 \ 3 Scan235 | |
| Letter discussing the testing of cork floats treated with Necol Black enamel and dope from Titanine Ltd. | 18th Jul 1922 | Box 49 \ 3 Scan236 | |
| Request for a spare filler cap for the petrol tank on No.4 Goshawk. | 18th Jul 1922 | Box 49 \ 3 Scan237 | |
| Clarifying the need for a dashboard petrol indicator for the Goshawk project, as a division in the tank is not possible. | 27th Jul 1922 | Box 49 \ 3 Scan238 | |
| Petrol level indicator design and fitting for the Goshawk model. | 27th Jul 1922 | Box 49 \ 3 Scan239 | |
| Lost petrol tank filler caps on the Goshawk model and a recommendation to secure them with a chain. | 10th Aug 1922 | Box 49 \ 3 Scan240 | |
| Fitting issues for a new pipe on a rear petrol tank and design improvements for the petrol gauge. | 21th Aug 1922 | Box 49 \ 3 Scan241 | |
| Telegram reporting an unsoldered petrol pipe and requesting a complete replacement be sent to Wittering. | 22th Aug 1932 | Box 49 \ 3 Scan242 | |
| Issues with petrol joint washers on the 20 HP carburetter and proposing material changes. | 1st Feb 1923 | Box 49 \ 3 Scan243 | |
| Request to order two gross agglomerated cork washers for the Goshawk II petrol tank and indicator. | 22th Feb 1923 | Box 49 \ 3 Scan244 | |
| Testing of agglomerate cork washer samples from Arthur Bates & Co. Ltd. | 5th Mar 1923 | Box 49 \ 3 Scan245 | |
| Letter from a supplier regarding samples and pricing for cork washers. | 1st Mar 1923 | Box 49 \ 3 Scan246 | |
| Alteration memo for a 'Goshawk II' petrol tank, replacing a fibre washer with one made of agglomerated cork. | 2nd May 1923 | Box 49 \ 3 Scan247 | |
| Outlining suggestions for the finish of the 'Goshawk II' petrol tank level indicator glass. | 11th May 1923 | Box 49 \ 3 Scan248 | |
| Dust ingress under the petrol filler cap on a 20-HP chassis, based on a report from India. | 23th May 1923 | Box 49 \ 3 Scan249 | |
| Design and potential loss of the 20 HP+ chassis petrol tank filler cap. | 2nd Jul 1923 | Box 49 \ 3 Scan250 | |
| Modifying the Goshawk 11 petrol tank filter and sump to increase ground clearance. | 5th Jul 1923 | Box 49 \ 3 Scan251 | |
| Follow-up on customer complaints regarding the 20-HP chassis petrol filler cap being too easy to remove and allowing dust ingress. | 2nd Jul 1923 | Box 49 \ 3 Scan252 | |
| Customer's criticism regarding the design of the petrol filler on a 20 HP chassis. | 31th Jul 1923 | Box 49 \ 3 Scan253 | |
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