| Description | Date | Identifier | |
| Ineffective dampers and tests being carried out on a 20 HP car. | 7th Jan 1929 | Box 17 \ 3 Scan351 | |
| Blueprint showing a cross-section and mounting plate for an experimental engine test. | 7th Jan 1929 | Box 17 \ 3 Scan352 | |
| The testing and results of 'SS' engine mountings to reduce vibration. | 8th Jan 1929 | Box 17 \ 3 Scan353 | |
| The advantages of a rigid frame with a cross member for improved car control. | 8th Jan 1929 | Box 17 \ 3 Scan354 | |
| Secret memo regarding the steering and body type for vehicle 23-EX. | 8th Jan 1929 | Box 17 \ 3 Scan355 | |
| Request for a scheme to modify controls on the S.S. steering wheel, as suggested by 'R.' at Le Canadel. | 16th Jan 1929 | Box 17 \ 3 Scan356 | |
| Design for lowering the controls on the steering column. | 19th Jan 1929 | Box 17 \ 3 Scan357 | |
| Proposal for altering the controls on top of the steering wheel to reduce their height. | 22th Jan 1929 | Box 17 \ 3 Scan358 | |
| Outstanding work for the 'SS' Production 10,000 mile car, including items from 'Camacha' and controls. | 21th Jan 1929 | Box 17 \ 3 Scan359 | |
| Performance of side steering tube ends on SS cars during a 10,000-mile test. | 22th Jan 1929 | Box 17 \ 3 Scan360 | |
| Lowering steering column controls and standardizing larger steering wheels. | 23th Jan 1929 | Box 17 \ 3 Scan361 | |
| Wear and failure issues with spring bearings and steering components, comparing SS and Phantom models. | 30th Jan 1929 | Box 17 \ 3 Scan362 | |
| Suggestions for protecting overflow pipes and problems with soldered joints on petrol and lubrication pipes. | 25th Jan 1929 | Box 17 \ 3 Scan363 | |
| Wear issues and proposed solutions for side steering tube ends, scheme 2301. | 1st Mar 1929 | Box 17 \ 3 Scan364 | |
| Assembly and standardisation instructions for 'SS' type side steering tube ends. | 3rd Mar 1929 | Box 17 \ 3 Scan365 | |
| Cross-sectional diagram of the S.S. Side Steering Tube Ends, highlighting points for fitting up. | 7th Jun 1929 | Box 17 \ 3 Scan366 | |
| Cross steering tube ball ends. | 1st Apr 1929 | Box 17 \ 3 Scan367 | |
| The return of four springs for a special test on Chassis No. 89 - KR. | 10th Apr 1929 | Box 17 \ 3 Scan368 | |
| Letter discussing a broken shock absorber and requesting steering system experiments on car 22-EX. | 10th Apr 1929 | Box 17 \ 3 Scan369 | |
| Propeller shaft leaks, shock absorber arrangements, and the K.S. telegage. | 11th Apr 1929 | Box 17 \ 3 Scan370 | |
| Return of four special side steering tube springs for chassis 89-KR. | 11th Apr 1929 | Box 17 \ 3 Scan371 | |
| Letter discussing braking linkage efficiency and the supply of new Ferobestos brake linings. | 19th Apr 1929 | Box 17 \ 3 Scan372 | |
| Continued memorandum discussing brake lining performance, modifications, and steering problems. | 19th Apr 1929 | Box 17 \ 3 Scan373 | |
| Modifications and testing for steering and suspension components. | 22th Apr 1929 | Box 17 \ 3 Scan374 | |
| 10,000-mile test on the 22-EX car, detailing issues with steering, shock absorbers, slipper drive and the starter motor. | 22th Apr 1929 | Box 17 \ 3 Scan375 | |
| High load required on the 'SS' steering system and requesting a spring design. | 23th Apr 1929 | Box 17 \ 3 Scan376 | |
| Schemes for controls on the steering column for the India 4 model, including an option with a Klaxon switch. | 23th Apr 1929 | Box 17 \ 3 Scan377 | |
| Letter to Mr. Hancock in France discussing steering setup, tyre effects, and a damaged starter motor/flywheel. | 6th May 1929 | Box 17 \ 3 Scan378 | |
| Letter discussing braking tests and requesting details and feedback on cross steering tube springs. | 14th May 1929 | Box 17 \ 3 Scan379 | |
| Proposal to change the spring rating for the S.S. chassis steering side tube. | 14th May 1929 | Box 17 \ 3 Scan380 | |
| Specifications for S.S. side steering tube springs. | 15th May 1929 | Box 17 \ 3 Scan381 | |
| New springs for 'SS' steering column controls being satisfactory for production and a request to correct lever movement. | 18th Jun 1929 | Box 17 \ 3 Scan382 | |
| Alterations to the 'SS' steering lock to achieve a 38 degree lock. | 23th May 1929 | Box 17 \ 3 Scan383 | |
| Strength requirements for S.S. side steering tube springs. | 15th May 1929 | Box 17 \ 3 Scan384 | |
| Standardisation of the cross steering tube and the two available spring options for different ball end loadings. | 14th Jun 1929 | Box 17 \ 3 Scan385 | |
| New springs for the 'SS' steering column controls and a request for production corrections. | 18th Jun 1929 | Box 17 \ 3 Scan386 | |
| Report from Bourges, France, detailing road tests, fuel supply issues with the Autovac, and speedometer discrepancies on car 21EX. | 23th Jun 1929 | Box 17 \ 3 Scan387 | |
| Vehicle road test detailing issues with steering, engine vibration, and fuel starvation. | 10th Feb 1930 | Box 17 \ 3 Scan388 | |
| Test drive report complaining about the steering and stability of Chassis 20-EX. | 10th Feb 1930 | Box 17 \ 3 Scan389 | |
| Steering performance and radiator 'jellying' on a Phantom II Coupé during road tests. | 1st Apr 1930 | Box 17 \ 3 Scan390 | |
| Test results and recommendations for the Phantom II steering system. | 12th May 1930 | Box 17 \ 3 Scan391 | |
| Recommendations regarding Phantom II steering complaints, focusing on wheel balance, tyre pressure, and pivot lean. | 13th May 1930 | Box 17 \ 3 Scan392 | |
| Technical notes on steering tube adjustments, 'toe-in' settings, and shock absorber issues. | 13th May 1930 | Box 17 \ 3 Scan393 | |
| Poor steering issues related to shock absorbers and tyres, including a diagram for testing cross-steering tube load. | 13th May 1930 | Box 17 \ 3 Scan394 | |
| Blueprint showing a cross-section of a steering tube with assembly and testing specifications. | 13th May 1930 | Box 17 \ 3 Scan395 | |
| Seating positions, dimensions, and adjustments for different driver types. | 29th May 1930 | Box 17 \ 3 Scan396 | |
| Need to improve the design and placement of control levers on the steering wheel. | 30th Jun 1930 | Box 17 \ 3 Scan397 | |
| The design of steering column controls, comparing the company's rack system to American friction-based systems. | 8th Jul 1930 | Box 17 \ 3 Scan398 | |
| Proposal to standardise an all-black finish for the 40/50 Chassis steering wheel. | 14th Jul 1930 | Box 17 \ 3 Scan399 | |
| Proposed controls on the steering column, including the Klaxon switch and control ball height. | 9th Jul 1930 | Box 17 \ 3 Scan400 | |
| Availability of detail drawings for the Phantom II controls on the steering column. | 17th Sep 1930 | Box 17 \ 3 Scan401 | |
| Design of steering column controls, comparing them to American versions. | 8th Jul 1930 | Box 17 \ 3 Scan402 | |
| Standardisation of chassis parts for a steering wheel with an all-black finish. | 14th Jul 1930 | Box 17 \ 3 Scan403 | |
| Proposed modifications to the controls on the steering column and the klaxon switch. | 19th Jul 1930 | Box 17 \ 3 Scan404 | |
| Slight alteration to the S.S. Side Steering Tube setting. | 12th Aug 1929 | Box 17 \ 3 Scan405 | |
| Blueprint detailing the modified S.S. tube setting. | 12th Aug 1929 | Box 17 \ 3 Scan406 | |
| Blank document page with a 'Print Room' date stamp. | 12th Aug 1929 | Box 17 \ 3 Scan407 | |
| Graph plotting load in LBS against the relative movement of two ball ends for different tube settings. | 13th Aug 1929 | Box 17 \ 3 Scan408 | |
| Mostly illegible document with a purple ink stamp from the Print Room in Derby. | 13th Aug 1929 | Box 17 \ 3 Scan409 | |
| Attaching a clearer print of proposed modifications to the side steering tube adjustment. | 19th Aug 1929 | Box 17 \ 3 Scan410 | |
| Modification to the setting of spring-loaded joints for the 'SS' Chassis side steering tube. | 30th Aug 1929 | Box 17 \ 3 Scan411 | |
| Pros and cons of 'C' steering design and proposing experimental modifications for better ergonomics. | 10th Oct 1930 | Box 17 \ 3 Scan412 | |
| Fitting of lower controls on the steering column for a Phantom II car, chassis 22-EX. | 13th Oct 1930 | Box 17 \ 3 Scan413 | |
| Proposed new position of the 'C' type steering column and required alterations to the dash and frame brackets. | 15th Oct 1930 | Box 17 \ 3 Scan414 | |
| Proposed modification to 'C' Steering, suggesting a trial on a car before final approval. | 15th Oct 1930 | Box 17 \ 3 Scan415 | |
| Arranging to fit a modified 'C' type steering column and improved controls to the same Phantom II car for evaluation. | 16th Oct 1930 | Box 17 \ 3 Scan416 | |
| Bringing experimental cars with lowered controls and modified steering to London. | 18th Oct 1930 | Box 17 \ 3 Scan417 | |
| Layout and design principles for the instrument board on 'C' and 'D' type vehicles. | 27th Oct 1930 | Box 17 \ 3 Scan418 | |
| Requesting remarks on criticisms of the reduced controls on the steering column. | 7th Nov 1930 | Box 17 \ 3 Scan419 | |
| Criticisms and proposed design changes for the lower controls on the steering column. | 11th Nov 1930 | Box 17 \ 3 Scan420 | |
| Requesting a steering wheel mock-up, discussing clearance issues with the mixture lever. | 15th Nov 1930 | Box 17 \ 3 Scan421 | |
| Modification request to improve accessibility of an oil hole on the 40/50 HP Chassis Steering Column Controls. | 19th Nov 1930 | Box 17 \ 3 Scan422 | |
| Modification and delayed implementation of a revised 'C' steering column. | 27th Nov 1930 | Box 17 \ 3 Scan423 | |
| Confirming the approval and arrangements for the introduction of the revised 'C' Steering on the N.2. Series. | 2nd Dec 1930 | Box 17 \ 3 Scan424 | |
| Blueprint showing the results of bumper tests on radiator and engine movement under various conditions. | 17th May 1930 | Box 17 \ 4 Scan001 | |
| Follow-up memo regarding efforts to improve the appearance of lowered controls. | 1st Jan 1931 | Box 17 \ 4 Scan002 | |
| Data table for the L.H. Chassis 25-EX steering geometry curve. | 7th Mar 1931 | Box 17 \ 4 Scan003 | |
| Instructions for a rubber-damped steady for the steering column on a Phantom II chassis for Lord Herbert Scott. | 9th Apr 1931 | Box 17 \ 4 Scan004 | |
| Clarifying the suitability of a rubber damped steady for various steering types on the Phantom II chassis. | 21th Apr 1931 | Box 17 \ 4 Scan005 | |
| Standardization of dashboards, steering columns, pedals, and levers for P. 2. L. H. steering models. | 22th Apr 1931 | Box 17 \ 4 Scan006 | |
| Requesting the trial of a friction device on the Phantom II steering column by altering an existing Phantom I column. | 30th May 1931 | Box 17 \ 4 Scan007 | |
| Part changes for the Phantom II chassis steering column and box, relating to a new friction device. | 17th Jun 1931 | Box 17 \ 4 Scan008 | |
| Parts list with an instruction to apply a standard chromium finish. | 17th Jun 1931 | Box 17 \ 4 Scan009 | |
| Proposal for lowering controls on the steering column, noting potential bakelite moulding difficulties. | 23th Jul 1931 | Box 17 \ 4 Scan010 | |
| Urgent request for a mock-up of a 'lowered controls' scheme, starting with a small unit for examination. | 24th Jul 1931 | Box 17 \ 4 Scan011 | |
| Tests carried out to investigate 'joggling' in the steering of Phantom II cars. | 1st Aug 1931 | Box 17 \ 4 Scan012 | |
| Comparative road tests focusing on steering, suspension, and handling characteristics. | 31th Aug 1931 | Box 17 \ 4 Scan013 | |
| The effects of damping, steering components, tyres, and shackles on vehicle ride and handling. | 1st Aug 1931 | Box 17 \ 4 Scan014 | |
| Continued analysis of spring eye movement under various road and braking conditions, and the development of a new flexible shackle. | 31th Aug 1931 | Box 17 \ 4 Scan015 | |
| Blueprint diagram for a device called a 'Steering Snatchmeter'. | 31th Aug 1931 | Box 17 \ 4 Scan016 | |
| Mostly blank document page with a purple company date stamp. | 31th Aug 1931 | Box 17 \ 4 Scan017 | |
| Charts illustrating the maximum movement of a flexible shackle spring eye under various driving and road conditions. | 31th Aug 1931 | Box 17 \ 4 Scan018 | |
| Preliminary pencil sketch of a mechanical component or assembly. | 31th Aug 1931 | Box 17 \ 4 Scan019 | |
| Table of results from steering tests using a snatchmeter to record joggling under various conditions. | 31th Aug 1931 | Box 17 \ 4 Scan020 | |
| Largely illegible document with a purple date stamp in the bottom right corner. | 31th Aug 1931 | Box 17 \ 4 Scan021 | |
| Cause and potential solution for variations in cross steering tube load. | 25th Nov 1931 | Box 17 \ 4 Scan022 | |
| Issues and proposed modifications for cross steering tube poundage on Phantom II and 25 HP models. | 26th Nov 1931 | Box 17 \ 4 Scan023 | |
| Depot sheet about variations in cross steering tube load for the Phantom II and 25 HP models. | 27th Nov 1931 | Box 17 \ 4 Scan024 | |
| Scheme 3394 for flattened steering column controls and the incorporation of a headlamp dipping switch. | 23th Dec 1931 | Box 17 \ 4 Scan025 | |
| Design and suitability of a guard ring type steering column control. | 15th Jan 1932 | Box 17 \ 4 Scan026 | |
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