| Description | Date | Identifier | |
| The correct front and rear springs for models 14-G-1V and 19-EX. | 10th Dec 1928 | Box 106 \ 1 scan0148 | |
| Order for additional G.1V springs. | 10th Dec 1928 | Box 106 \ 1 scan0149 | |
| Suggestion for a centralised spring lubrication system and the intent to patent the idea. | 23th Jan 1929 | Box 106 \ 1 scan0150 | |
| Letter from Melbourne about frequent breakages of front spring top leaves, comparing the poor quality and high cost of Derby parts to superior, cheaper, locally-made alternatives. | 30th Jan 1929 | Box 106 \ 1 scan0151 | |
| Forwarding of a locally made leaf for inspection and criticism. | 30th Jan 1929 | Box 106 \ 1 scan0152 | |
| From Melbourne discussing a customer complaint about being overcharged for a replacement top spring leaf on a Chassis GF 17. | 5th Feb 1929 | Box 106 \ 1 scan0153 | |
| Standardizing the 20 HP car's springing for all markets. | 20th Mar 1929 | Box 106 \ 1 scan0154 | |
| Letter from Melbourne discussing the high cost of rear spring leaves for 20 HP cars due to Australian duties. | 7th Mar 1929 | Box 106 \ 1 scan0155 | |
| Details for ordering experimental front and rear road springs for the INDIA III chassis. | 5th Apr 1928 | Box 106 \ 1 scan0156 | |
| Testing larger bore springs on a 20 HP car and their lubrication. | 1st May 1929 | Box 106 \ 1 scan0157 | |
| Spring gaiter fouling issues on the 20 HP chassis and potential lubrication solutions. | 28th May 1929 | Box 106 \ 1 scan0158 | |
| Design change to the 20 HP 'P' Series springs, replacing the rolled eye with a solid forged eye. | 12th Jul 1929 | Box 106 \ 1 scan0159 | |
| Questioning the expense of a new road spring manufacturing method compared to its unproven benefits over existing reliable methods. | 23th Jul 1929 | Box 106 \ 1 scan0160 | |
| Urgent order for two pairs of 20 HP front springs for the 'P' series. | 20th Aug 1929 | Box 106 \ 1 scan0161 | |
| The increased life of road springs with the fitting of hydraulic shock absorbers. | 23th Oct 1929 | Box 106 \ 1 scan0162 | |
| Manufacturing a hollow rolled plate spring to improve bedding and save costs. | 8th Jan 1930 | Box 106 \ 1 scan0163 | |
| Results of a bumping test on 20 HP drilled and grooved road springs. | 8th Jan 1930 | Box 106 \ 1 scan0164 | |
| Recommending spring poundage for model 14-G4. | 14th Jan 1930 | Box 106 \ 1 scan0165 | |
| Complaints of creaking road springs on centrally lubricated 20-HP cars. | 24th Jan 1930 | Box 106 \ 1 scan0166 | |
| Creaking road springs on 20HP cars, noting they are not automatically lubricated. | 29th Jan 1930 | Box 106 \ 1 scan0167 | |
| Road spring lubrication scheme, test results, and proposed improvements for 20 HP and 40/50 models. | 25th Apr 1930 | Box 106 \ 1 scan0168 | |
| With recommendations on springs and damping for Phantom II and 25 HP models based on American and European road conditions. | 14th May 1930 | Box 106 \ 1 scan0169 | |
| Springing for Phantom II and 20 HP cars, comparing flexible versus stiffer spring types. | 14th May 1930 | Box 106 \ 1 scan0170 | |
| Analysis of vehicle ride quality complaints, specifically focusing on rear seat observations. | 14th May 1930 | Box 106 \ 1 scan0171 | |
| Vehicle suspension issues, including spring rating, deflection, and the impact on steering. | 14th May 1930 | Box 106 \ 1 scan0172 | |
| Poor road holding at high speeds, evaluating current suspension systems and proposing a new front suspension design. | 14th May 1930 | Box 106 \ 1 scan0173 | |
| Fitting of new front and rear springs to chassis 82-AL to solve issues with pitching and bumping. | 5th May 1930 | Box 106 \ 1 scan0174 | |
| Leaf spring construction, ratings, and deflection under load for front springs. | 15th May 1930 | Box 106 \ 1 scan0175 | |
| Urgent order request for a pair of special 20 HP front springs from Firths with detailed specifications. | 14th May 1930 | Box 106 \ 1 scan0176 | |
| Comparison of standard and proposed specifications for 20 HP front springs. | 1st May 1930 | Box 106 \ 1 scan0177 | |
| From the Paris Depot concerning car springing issues, particularly for the Phantom II, and the need for more accurate load specifications. | 21th May 1930 | Box 106 \ 1 scan0178 | |
| Urgent memo addressing an epidemic of weak springing on 25 HP and Phantom II chassis. | 15th May 1930 | Box 106 \ 1 scan0179 | |
| The expense of changing springs for customers free of cost, which is the second page of a larger document. | 23th May 1930 | Box 106 \ 1 scan0180 | |
| Poor road holding of a 25 HP car, suggesting the front springs are too highly rated and proposing a modification. | 23th May 1930 | Box 106 \ 1 scan0181 | |
| Customer complaints about the springing and riding qualities of the Phantom II and 25 HP models. | 23th May 1930 | Box 106 \ 1 scan0182 | |
| Shock absorber loading, damping tests, and ride comfort for various car models. | 23th May 1930 | Box 106 \ 1 scan0183 | |
| Customer complaints and improvements for the Phantom and 20 HP models, particularly regarding drilled valves and ride quality. | 23th May 1930 | Box 106 \ 1 scan0184 | |
| List of customer complaints regarding suspension bumping on buffers, with suggested solutions. | 23th May 1930 | Box 106 \ 1 scan0185 | |
| Log of customer and trial vehicle suspension issues and proposed remedies. | 23th May 1930 | Box 106 \ 1 scan0186 | |
| List of vehicle chassis numbers with notes on complaints, remedies, and observations. | 26th May 1930 | Box 106 \ 1 scan0187 | |
| Shock absorber loads for model 16-G4 and methods for adjustment. | 26th May 1930 | Box 106 \ 1 scan0188 | |
| Adjustments to vehicle springing for Continental cars compared to English conditions. | 26th May 1930 | Box 106 \ 1 scan0189 | |
| Suspension issues, including requirements for weaker front springs and adjustments to rear spring buffer clearance. | 31th May 1930 | Box 106 \ 1 scan0190 | |
| How to handle spring complaints from a service point of view. | 4th Jul 1930 | Box 106 \ 1 scan0191 | |
| Notes on improving the springing and ride qualities of cars, with recommendations for rear and front spring and damper settings. | 4th Jul 1930 | Box 106 \ 1 scan0192 | |
| Vehicle suspension tuning, body rattles, and the design of seat cushions and squabs for improved comfort. | 4th Jul 1930 | Box 106 \ 1 scan0193 | |
| Suspension tuning, focusing on the interplay between spring stiffness and shock absorber damping. | 10th Jul 1930 | Box 106 \ 1 scan0194 | |
| The failure and return of two 20 HP front springs for a rebuild. | 10th Jul 1930 | Box 106 \ 1 scan0195 | |
| Standardisation of chassis parts for lubricated road springs to improve riding qualities. | 8th Apr 1930 | Box 106 \ 1 scan0196 | |
| Availability of experimental 20/25 HP front road springs. | 3rd Sep 1930 | Box 106 \ 1 scan0197 | |
| Specification and order for special low rating front springs for the 20/25 HP chassis. | 26th Sep 1930 | Box 106 \ 1 scan0198 | |
| Urgent internal memo requesting an order for two pairs of 20 HP front springs. | 26th Sep 1930 | Box 106 \ 1 scan0199 | |
| 'Wor' to 'Hs' requesting information on a 20/25 HP Chassis to reply to a Mr. Beaver. | 26th Sep 1930 | Box 106 \ 1 scan0200 | |
| Suggested reply to a customer complaint regarding the ride quality of a 25 HP car. | 3rd Oct 1930 | Box 106 \ 1 scan0201 | |
| Requests for the alteration and procurement of low-rating road springs. | 8th Oct 1930 | Box 106 \ 1 scan0202 | |
| Refurbishment requirements for a set of 20 HP rear road springs. | 23th Oct 1930 | Box 106 \ 1 scan0203 | |
| Specifications for spare springs for the 25-EX U.S.A. model and 20 HP front springs. | 27th Oct 1930 | Box 106 \ 1 scan0204 | |
| Causes of and solutions for weak rear springs on the Phantom II chassis. | 1st Nov 1930 | Box 106 \ 1 scan0205 | |
| Procedures and specifications for fitting stronger springs and setting buffer clearances. | 1st Nov 1930 | Box 106 \ 1 scan0206 | |
| Complaints about uncomfortable springs on Phantom II cars and the influence of body type. | 1st Nov 1930 | Box 106 \ 1 scan0207 | |
| Future suspension improvements and analysis of springing complaints for various car models. | 1st Nov 1930 | Box 106 \ 1 scan0208 | |
| Resolving complaints about hard low-speed riding and spring squeaks in 25 HP and Phantom I cars. | 1st Nov 1930 | Box 106 \ 1 scan0209 | |
| Shock damper load alterations and spring lubrication for 20 HP and 25 HP cars. | 1st Nov 1931 | Box 106 \ 1 scan0210 | |
| The 20/25 model should be sprung for fast touring using special springs and less severe damping. | 7th Nov 1930 | Box 106 \ 1 scan0211 | |
| Car springing design, flexibility, and weight distribution. | 19th Nov 1930 | Box 106 \ 1 scan0212 | |
| Internal order request for two sets of 20 HP springs, with an urgent delivery request to Messrs. Firths for one pair. | 13th Dec 1930 | Box 106 \ 1 scan0213 | |
| Specifications for lower rating springs required for model 18-G4. | 13th Dec 1930 | Box 106 \ 1 scan0214 | |
| Decision to proceed with testing low-rating 20 HP springs for potential standardization. | 13th Dec 1930 | Box 106 \ 1 scan0215 | |
| Road spring specifications for the Phantom II and 20 HP models ordered in 1930. | 19th May 1930 | Box 106 \ 1 scan0216 | |
| Suspension work and spring testing for the 25 HP trials car. | 17th Jan 1931 | Box 106 \ 1 scan0217 | |
| Modifications to the 25 HP car's springing following complaints from Springfield. | 19th Jan 1931 | Box 106 \ 1 scan0218 | |
| Modifications to the 25 HP springing and associated costs. | 20th Jan 1931 | Box 106 \ 1 scan0219 | |
| Internal order request for two pairs of 20 HP front road springs. | 23th Jan 1931 | Box 106 \ 1 scan0220 | |
| The desirable proportions for sports type road springs on the 20 HP model. | 27th Jan 1931 | Box 106 \ 1 scan0221 | |
| Proposing rear road springs to lower the Continental Touring 20/25 HP chassis. | 28th Jan 1931 | Box 106 \ 1 scan0222 | |
| Cost-saving design changes for the 'Japan 3' model's spring anchorages. | 29th Jan 1931 | Box 106 \ 1 scan0223 | |
| Proposing road spring specifications for a special 25 HP touring car. | 2nd Feb 1931 | Box 106 \ 1 scan0224 | |
| Preliminary specifications for a low rating suspension for 20 HP cars. | 2nd Mar 1931 | Box 106 \ 1 scan0225 | |
| The cost of the 25HP anchorage, proposing a new design forged from solid metal. | 2nd Mar 1931 | Box 106 \ 1 scan0226 | |
| Design improvements and simplifications for the Japan 3 rear spring front anchorage. | 1st Feb 1931 | Box 106 \ 1 scan0227 | |
| Modifications to the front anchorage of the rear springs for the Japan 3 model. | 14th Feb 1931 | Box 106 \ 1 scan0228 | |
| Cover note for particulars of cars fitted with low rating road springs. | 7th Mar 1931 | Box 106 \ 1 scan0229 | |
| Specification sheet for springing, damper loads, car weight and buffer clearances. | 7th Mar 1931 | Box 106 \ 1 scan0230 | |
| Specification sheet for front and rear springs, damper loads, car weight, and buffer clearances. | 17th Apr 1931 | Box 106 \ 1 scan0231 | |
| Specification sheet for vehicle springing, damper loads, car weight, and buffer clearances. | 17th Apr 1931 | Box 106 \ 1 scan0232 | |
| Specification sheet detailing spring, damper, weight, and clearance measurements. | 17th Apr 1931 | Box 106 \ 1 scan0233 | |
| Springing specifications for vehicle 18-EX as it left Derby before proceeding to Le Canadel. | 17th Apr 1931 | Box 106 \ 1 scan0234 | |
| Specifications for springing, damper loads, car weight, and buffer clearances. | 17th Apr 1931 | Box 106 \ 1 scan0235 | |
| Specification sheet for model 22-EX springing, weights and clearances. | 11th May 1931 | Box 106 \ 1 scan0236 | |
| Standardisation of road springs for the Phantom and 25 HP models. | 11th May 1931 | Box 106 \ 1 scan0237 | |
| Summary of front spring testing for a 25 HP vehicle since January 1st, 1931. | 13th Apr 1931 | Box 106 \ 1 scan0238 | |
| Log sheet detailing tests and specifications for 25 HP rear springs. | 27th Mar 1931 | Box 106 \ 1 scan0239 | |
| Request to test converted 20/25 HP chassis road springs on the bumping rig before fitting them to customer cars. | 2nd Apr 1931 | Box 106 \ 1 scan0240 | |
| Ordering lower rated front and rear springs for a 20/25 HP chassis and clarifying lubrication requirements. | 1st May 1931 | Box 106 \ 1 scan0241 | |
| The parts required for supplying front and rear lubricated road springs for 20/25 HP chassis models. | 5th May 1931 | Box 106 \ 1 scan0242 | |
| Continued parts list for rear springs and fittings, detailing part replacements and obsolete items. | 5th May 1931 | Box 106 \ 1 scan0243 | |
| Design, stress, and manufacture of road springs. | 19th May 1931 | Box 106 \ 1 scan0244 | |
| Review of road springs, discussing the effects and disadvantages of fitting low-rating springs on riding comfort and steering. | 13th May 1931 | Box 106 \ 1 scan0245 | |
| Analysis of maximum stress in spring leaves and a summary of standardisation sheets for various models. | 13th May 1931 | Box 106 \ 1 scan0246 | |
| Specification table detailing the particulars of low rating springs for various car models. | 13th May 1931 | Box 106 \ 1 scan0247 | |
| | | | |
