| Description | Date | Identifier | |
| Comparison of the Marles and LaSalle steering systems used on Spectre models to investigate performance differences. | 26th Jun 1935 | Box 95 \ 1 scan0177 | |
| Analysis of mechanical efficiency tests on steering gears, comparing different designs and their performance under various loads. | 26th Jun 1935 | Box 95 \ 1 scan0178 | |
| Outlining a program of experiments on the Spectre gear, focusing on cam track crowning and gear angles. | 26th Jun 1935 | Box 95 \ 1 scan0179 | |
| Proposed modifications to the Marles type steering for the Spectre model to reduce joggling. | 26th Jun 1935 | Box 95 \ 1 scan0180 | |
| Sending a blueprint for Marles Type Steering on a Spectre Chassis to Adamant Engineering Co. | 28th Jun 1935 | Box 95 \ 1 scan0181 | |
| Oil weep from a Spectre-Marles type steering box and suggesting adding an extra bolt to the joint. | 6th Jul 1935 | Box 95 \ 1 scan0182 | |
| Programme of experiments on Spectre steering components. | 8th Jul 1935 | Box 95 \ 1 scan0183 | |
| Modifications to the Spectre Steering Gears due to excessive clearance in the rockshaft pin. | 9th Jul 1935 | Box 95 \ 1 scan0184 | |
| Status report outlining seven different design options and their progress for the Spectre steering system. | 12th Jul 1935 | Box 95 \ 1 scan0185 | |
| Trial of Timken Roller Bearings on the Spectre steering gear. | 12th Jul 1935 | Box 95 \ 1 scan0186 | |
| Suggesting a test to diagnose the cause of steering shocks on the Spectre model. | 16th Jul 1935 | Box 95 \ 1 scan0187 | |
| Steering shocks on the Spectre model and proposing a test to identify the cause. | 16th Jul 1935 | Box 95 \ 1 scan0188 | |
| Turning circle measurements for the Spectre and Phantom models. | 2nd Aug 1935 | Box 95 \ 1 scan0189 | |
| On a 10,000-mile Marles steering test for the Spectre II, requesting a specific cam be fitted. | 13th Sep 1935 | Box 95 \ 1 scan0190 | |
| Secret memo regarding a modification to the Spectre centre steering lever to improve lubrication. | 15th Aug 1935 | Box 95 \ 1 scan0191 | |
| New method for lubricating the Spectre steering column's pendulum lever ball end to prevent oil leakage. | 20th Aug 1935 | Box 95 \ 1 scan0192 | |
| Letter to British Timken Ltd. regarding the bore of steering gear housing and bearings. | 23th Aug 1935 | Box 95 \ 1 scan0193 | |
| Letter from a supplier discussing manufacturing tolerances and dimensions for steering gear bearings. | 24th Aug 1935 | Box 95 \ 1 scan0194 | |
| Letter from British Timken Ltd. regarding dimensions for a roller and cup, and thanking for a works visit. | 24th Aug 1935 | Box 95 \ 1 scan0195 | |
| Implementation of 'N' Scheme Timken Taper Roller Bearings for the Spectre chassis steering cam. | 24th Aug 1935 | Box 95 \ 1 scan0196 | |
| Letter to British Timken Ltd. regarding the trial of bearings and the satisfactory limits for bearing cups. | 26th Aug 1935 | Box 95 \ 1 scan0197 | |
| Letter from British Timken regarding bearings for a steering gear experiment. | 27th Aug 1935 | Box 95 \ 1 scan0198 | |
| Request to produce a stiffer rockershaft and a corresponding race for the Spectre Steering Gear. | 29th Aug 1935 | Box 95 \ 1 scan0199 | |
| Requesting parts for a modification to the Spectre steering lubrication system due to oil loss. | 3rd Sep 1935 | Box 95 \ 1 scan0200 | |
| Engine rattle, ignition system weaknesses, and insufficient turning circle after a road test. | 3rd Sep 1935 | Box 95 \ 1 scan0201 | |
| Road testing, covering turning circles, hill climb performance, cooling issues, and component updates. | 3rd Sep 1935 | Box 95 \ 1 scan0202 | |
| Blueprint graph of vehicle temperatures during a climb up the Stelvio Pass, Italy. | 4th Sep 1935 | Box 95 \ 1 scan0203 | |
| Table outlining Spectre steering cam and roller combinations. | 4th Sep 1935 | Box 95 \ 1 scan0204 | |
| Modifications and testing of Spectre Type Steering on a 25 HP car. | 4th Sep 1935 | Box 95 \ 1 scan0205 | |
| Issues with the 'Spectre' steering and proposing a development plan using car 21-G-IV for testing in France. | 6th Sep 1935 | Box 95 \ 1 scan0206 | |
| Steering modifications and trial arrangements for the Spectre & 20/25 HP models. | 6th Sep 1935 | Box 95 \ 1 scan0207 | |
| Details and modification requests for different build configurations of Gear No. 2. | 6th Sep 1935 | Box 95 \ 1 scan0208 | |
| Parts list for two gear assemblies to be supplied by Adamant Engineering Co. and Timkens. | 6th Sep 1935 | Box 95 \ 1 scan0209 | |
| List of parts on order for Gear No. 2, including bearings and roller assemblies. | 6th Sep 1935 | Box 95 \ 1 scan0210 | |
| Modification of Spectre Cross Steering Levers to restore steering lock. | 10th Sep 1935 | Box 95 \ 1 scan0211 | |
| The steering locks and turning circles for the Spectre model, comparing it with the Ph.II. | 12th Sep 1935 | Box 95 \ 1 scan0212 | |
| Comparison of anticipated vs measured turning circles for the Phantom II, and anticipated turning circles for the Phantom III. | 13th Sep 1935 | Box 95 \ 1 scan0213 | |
| Requesting measured figures for the Phantom III turning circles after a steering lever modification. | 16th Sep 1935 | Box 95 \ 1 scan0214 | |
| Decision to change the material of the Spectre steering pivot bottom bush from unhardened nickel steel to hard cast Phosphor Bronze for the Spectre 2 for France. | 18th Sep 1935 | Box 95 \ 1 scan0215 | |
| Progress of RHC work on steering experiments. | 19th Sep 1935 | Box 95 \ 1 scan0216 | |
| The turning circles for Spectre I and Spectre II cars. | 20th Sep 1935 | Box 95 \ 1 scan0217 | |
| Requesting a check of the steering lock on the Spectre II car. | 20th Sep 1935 | Box 95 \ 1 scan0218 | |
| Changing the plan for testing a phosphor bronze steering pivot bush on the Phantom III. | 20th Sep 1935 | Box 95 \ 1 scan0219 | |
| Request to return a borrowed paper on U.S.A. car practice to British Timken Ltd. | 20th Sep 1935 | Box 95 \ 1 scan0220 | |
| Specification table for Spectre & 20/25 HP steering part cams. | 27th Sep 1935 | Box 95 \ 1 scan0221 | |
| Table detailing different types of rollers for Spectre & 20/25 HP steering parts. | 27th Sep 1935 | Box 95 \ 1 scan0222 | |
| Requesting a test on the friction of roller bearings on a steering cam removed from a Spectre III. | 27th Sep 1935 | Box 95 \ 1 scan0223 | |
| Letter to British Timken Ltd regarding the return of a paper and the testing of Timken bearings. | 30th Sep 1935 | Box 95 \ 1 scan0224 | |
| Historical and current issues with the production of chassis steering worms, specifically regarding the inclusion or deletion of grooves. | 1st Oct 1935 | Box 95 \ 1 scan0225 | |
| Listing Spectre Steering parts to be held up from production for 200 cars. | 5th Oct 1935 | Box 95 \ 1 scan0226 | |
| Holding up production for specific unsatisfactory parts of the Spectre steering system. | 7th Oct 1935 | Box 95 \ 1 scan0227 | |
| On changing the steering cam crowning specification from 0.005 to 0.002 for test and demonstration cars. | 10th Oct 1935 | Box 95 \ 1 scan0228 | |
| Modifications to the Phantom III steering column, wheel, and controls. | 16th Oct 1935 | Box 95 \ 1 scan0229 | |
| Technical discussion regarding modifications to control levers and the steering column assembly. | 16th Oct 1935 | Box 95 \ 1 scan0230 | |
| Design modifications and specifications for a press-button switch on a steering column. | 6th Nov 1935 | Box 95 \ 1 scan0231 | |
| Specification change for Phantom III steering cam crowning. | 6th Nov 1935 | Box 95 \ 1 scan0232 | |
| Improving the Phantom III steering by sending parts back to the Adamant Co. for correction. | 7th Nov 1935 | Box 95 \ 1 scan0233 | |
| Collection and despatch of Phantom III steering components to Adamant Engineering Co.Ld. | 8th Nov 1935 | Box 95 \ 1 scan0234 | |
| Oil leak in the Ph.III & 25 HP Marles Type Steering and a proposed modification. | 11th Nov 1935 | Box 95 \ 1 scan0235 | |
| Oil leak in the Marles Type Steering system due to a badly fitted sleeve and a proposal for a design modification. | 11th Nov 1935 | Box 95 \ 1 scan0236 | |
| Request to grind a rocker shaft to test a different roller cage for the Phantom III steering. | 12th Nov 1935 | Box 95 \ 1 scan0237 | |
| Steering modifications for the 33-EX model, based on information obtained from a Packard car. | 12th Nov 1935 | Box 95 \ 1 scan0238 | |
| Summary of preliminary Joggle Tests conducted on the 30-EX chassis. | 18th Nov 1935 | Box 95 \ 1 scan0239 | |
| Requesting modifications to the steering system for the 35-EX car. | 23th Nov 1935 | Box 95 \ 1 scan0240 | |
| Specifying the set up loads for the steering gear bearings on the 35-EX model. | 26th Nov 1935 | Box 95 \ 1 scan0241 | |
| Request to detail and construct a set of parts for a Phantom III steering modification using plain bearings. | 26th Nov 1935 | Box 95 \ 1 scan0242 | |
| Wording change for the Phantom III's steering column riding control. | 2nd Dec 1935 | Box 95 \ 1 scan0243 | |
| Modifications and considerations for fitting La Salle steering gear to a Phantom III chassis. | 5th Dec 1935 | Box 95 \ 1 scan0244 | |
| Comparison table of steering system specifications for various models and configurations. | 5th Dec 1935 | Box 95 \ 1 scan0245 | |
| Modification of a La Salle steering pendulum lever for the Phantom III. | 5th Dec 1935 | Box 95 \ 1 scan0246 | |
| Specific Timken taper roller bearings used for the Phantom III steering gear. | 10th Dec 1935 | Box 95 \ 1 scan0247 | |
| Change in lead cam specifications for Phantom III steering following recent tests. | 13th Dec 1935 | Box 95 \ 1 scan0248 | |
| Noise issues from the Phantom III steering column resonance and proposed solutions. | 13th Dec 1935 | Box 95 \ 1 scan0249 | |
| Requesting an alteration to the steering specification for the 37-EX model, specifically regarding the lead cam. | 14th Nov 1935 | Box 95 \ 1 scan0250 | |
| Specifications for standardizing and improving the Ph.III steering system. | 18th Dec 1935 | Box 95 \ 1 scan0251 | |
| Oil leakage, movement, and weak bolts on the Marles Steering Box for the Phantom III and 25-30 HP Chassis. | 20th Dec 1935 | Box 95 \ 1 scan0252 | |
| Programme of steering experiments for Phantom III and 25 HP models. | 23th Dec 1935 | Box 95 \ 1 scan0253 | |
| Modifications and preloading options for the Marles steering system on the Phantom III model. | 24th Dec 1935 | Box 95 \ 1 scan0254 | |
| Steering joggles in 25 HP and Phantom III models. | 1st Jan 1936 | Box 95 \ 1 scan0255 | |
| Steering experiments and modifications for the 25 HP and Phantom III models. | 1st Jan 1936 | Box 95 \ 1 scan0256 | |
| Friction torque measurements of steering bearings after a 10,000-mile test and subsequent alterations. | 1st Jan 1936 | Box 95 \ 1 scan0257 | |
| Experiments to improve steering gear performance by adjusting bearing loads and rocker shaft stiffness. | 1st Jan 1936 | Box 95 \ 1 scan0258 | |
| Analysis of steering joggle, comparing the standard system with a La Salle gear on a Phantom III. | 1st Jan 1936 | Box 95 \ 1 scan0259 | |
| Steering geometry, bearings, and potential improvements on 25 HP and Ph.III chassis. | 1st Jan 1936 | Box 95 \ 1 scan0260 | |
| Joggle test results for various Marles steering gear configurations on a 21GIII (25HP) model. | 2nd Jan 1936 | Box 95 \ 1 scan0261 | |
| Modifications to the Side Steering Tube for Ph.III Marles Steering on 25/30 HP models. | 2nd Jan 1936 | Box 95 \ 1 scan0262 | |
| Instruction to fit larger bolts to the Marles steering boxes on Phantom III and 25 HP models. | 2nd Jan 1936 | Box 95 \ 1 scan0263 | |
| The condition of the Phantom III steering column needle bearing, concluding that surface hardening is unnecessary. | 8th Jan 1936 | Box 95 \ 1 scan0264 | |
| The characteristics of side steering tube springs, specifically noting an incorrect load adjustment on the 33-EX car. | 9th Jan 1936 | Box 95 \ 1 scan0265 | |
| Graph comparing the characteristics of different side steering tubes. | 9th Jan 1936 | Box 95 \ 1 scan0266 | |
| Characteristics of side steering tube springs, specifically for car 33-EX. | 9th Jan 1936 | Box 95 \ 1 scan0267 | |
| Clarifying steering build instructions for model 36-EX, concerning lead cams and rockershafts. | 10th Jan 1936 | Box 95 \ 1 scan0268 | |
| Request for the return of incorrectly machined Ph.III steering gear roller followers for correction or replacement. | 24th Jan 1936 | Box 95 \ 1 scan0269 | |
| Letter to The Adamant Engineering Co. Ltd. regarding the return of faulty roller followers and progress on steering experiments. | 24th Jan 1936 | Box 95 \ 1 scan0270 | |
| Modifications to be carried out on the steering of chassis 34-EX. | 30th Jan 1936 | Box 95 \ 1 scan0271 | |
| Requesting the fitting of a steel damping tube to Ph.III & 25 HP steering systems. | 31th Jan 1936 | Box 95 \ 1 scan0272 | |
| Cost breakdown and estimate for Bentley and Phantom III side steering tube parts. | 3rd Feb 1936 | Box 95 \ 1 scan0273 | |
| The correct fitting position for 3 spoke steering wheels. | 7th Feb 1936 | Box 95 \ 1 scan0274 | |
| Clarification memo regarding the specification for the Standard Phantom III steering system. | 7th Feb 1936 | Box 95 \ 1 scan0275 | |
| Preloading specifications for Marles Type Steering on Phantom III & 25 HP models. | 7th Aug 1936 | Box 95 \ 1 scan0276 | |
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