| Description | Date | Identifier | |
| Confirmation of wire regarding the construction of an open body for chassis 23-EX by Carlton Carriage. | 20th Dec 1928 | Box 14 \ 8 Scan101 | |
| Problems with coachbuilder-supplied bodies for 'SS' chassis. | 27th Dec 1928 | Box 14 \ 8 Scan102 | |
| Letter addressing inaccuracies in subframes and the plan to correct them during the Christmas holiday. | 31th Dec 1928 | Box 14 \ 8 Scan103 | |
| Note confirming the delivery of a sub-frame for a 23-EX Open Tourer to the Carlton Carriage Company. | 31th Dec 1928 | Box 14 \ 8 Scan104 | |
| 'SS' engine mounting, vibrations, and potential alternatives to the standard Phantom chassis. | 1st Apr 1929 | Box 14 \ 8 Scan105 | |
| 'SS' and 20 HP engine mounting, frame flexibility, vibrations, and proposed rubber-based solutions. | 4th Jan 1929 | Box 14 \ 8 Scan106 | |
| Design of an engine mounting back plate and rubber supports. | 23th Jan 1929 | Box 14 \ 8 Scan107 | |
| Design and potential improvements for car and aero engine mountings. | 23th Jan 1929 | Box 14 \ 8 Scan108 | |
| Technical memorandum detailing the design and installation of the 'SS' engine mounting and rear engine feet. | 28th Jan 1929 | Box 14 \ 8 Scan109 | |
| Design details and sales viability for an SS chassis open touring body. | 1st Feb 1929 | Box 14 \ 8 Scan110 | |
| Design and challenges of an 'SS' engine mounting system, considering dampers, rubber, and frame stiffness. | 1st Feb 1929 | Box 14 \ 8 Scan111 | |
| Agreed modifications to subframes for SS and India bodies. | 5th Feb 1929 | Box 14 \ 8 Scan112 | |
| Gearbox removal by lifting the body, and the design of the front crossmember. | 14th Feb 1929 | Box 14 \ 8 Scan113 | |
| Recommendation for a detachable front subframe cross-member to facilitate gearbox removal. | 14th Feb 1929 | Box 14 \ 8 Scan114 | |
| Urgent requirements for a side wheel carrier and a detachable cross member. | 1st Mar 1929 | Box 14 \ 8 Scan115 | |
| Letter to Messrs. Barker & Co. Ltd. confirming the collection of a sub-frame for experimental chassis No. 24-EX. | 3rd Mar 1929 | Box 14 \ 8 Scan116 | |
| Investigation and proposed trial of tubular cross members to eliminate radiator 'shimmy' on an SS frame. | 11th Mar 1929 | Box 14 \ 8 Scan117 | |
| Delay in modifications for the 'SS' car for France and the feasibility of production. | 14th Mar 1929 | Box 14 \ 8 Scan118 | |
| Copy of a telegram instructing a change in frame design from a cross member to large tubes. | 14th Mar 1929 | Box 14 \ 8 Scan119 | |
| Chassis stiffness, periodicity, and testing methods for the 20 HP & SS Chassis. | 14th Mar 1929 | Box 14 \ 8 Scan120 | |
| Continued note on the performance characteristics of smaller road wheels. | 22th Mar 1929 | Box 14 \ 8 Scan121 | |
| Confirming instructions from a telegram regarding chassis modifications, spring stiffness, and connecting rods. | 22th Mar 1929 | Box 14 \ 8 Scan122 | |
| Use of tubular cross members to improve chassis stiffness and manage vibration. | 25th Mar 1929 | Box 14 \ 8 Scan123 | |
| With diagram detailing modifications to 'SS' short chassis frame side members. | 27th Mar 1929 | Box 14 \ 8 Scan124 | |
| Requesting the manual production of 4 sets of 'SS' tubular cross members due to a four-week delivery delay for parts for experimental cars. | 27th Mar 1929 | Box 14 \ 8 Scan125 | |
| Modified 20 HP car, chassis 14-G-4, detailing performance improvements and arranging a comparison test. | 28th Mar 1929 | Box 14 \ 8 Scan126 | |
| Modifications to an S.S. exhaust, its application to the 20 HP model, and arranging a performance test. | 4th Apr 1929 | Box 14 \ 8 Scan127 | |
| Alterations to the 'S.S' short chassis frame side members. | 4th Apr 1929 | Box 14 \ 8 Scan128 | |
| Proposed modifications to the 'SS' exhaust system and L.H. control. | 13th Apr 1929 | Box 14 \ 8 Scan129 | |
| Requesting the creation of urgent linen tracings from drawings for a publication on body subframes. | 22th Apr 1929 | Box 14 \ 8 Scan130 | |
| Chassis weight distribution for an 'SS' model car under different conditions. | 23th Apr 1929 | Box 14 \ 8 Scan131 | |
| The dispatch of blueprints and drawings for body/subframes to coachbuilders. | 29th Apr 1929 | Box 14 \ 8 Scan132 | |
| Difficulties and solutions for mounting subframes on S.S. bodies. | 1st May 1929 | Box 14 \ 8 Scan133 | |
| Overcoming difficulties experienced when mounting the first bodies. | 13th May 1929 | Box 14 \ 8 Scan134 | |
| Secret memo regarding the issuance of prints for SS cars to coachbuilders, detailing chassis and steering specifications. | 13th May 1929 | Box 14 \ 8 Scan135 | |
| Chassis modifications related to steerings, scuttle, dash, and subframe members, with instructions for coachbuilders. | 13th May 1929 | Box 14 \ 8 Scan136 | |
| Tracings, a dimensional change for secrecy, and coordination for S.S. bodies being built in Paris. | 29th May 1929 | Box 14 \ 8 Scan137 | |
| Erection instructions and sub-frame particulars for 'WJ' Series Chassis trial cars. | 29th May 1929 | Box 14 \ 8 Scan138 | |
| Modification of three subframes from left-hand to right-hand chassis specification. | 30th May 1929 | Box 14 \ 8 Scan139 | |
| Conversion, handling, and numbering of S.S. Subframes for various experimental chassis. | 30th May 1929 | Box 14 \ 8 Scan140 | |
| Preparation of name plates and interim stamping of S.S. Subframes. | 31th May 1929 | Box 14 \ 8 Scan141 | |
| The allocation and modification of S.S. sub-frames for experimental chassis models 24-EX, 25-EX, and 26-EX. | 3rd Jun 1929 | Box 14 \ 8 Scan142 | |
| Design and function of 'SS' engine feet for vibration isolation using compressed rubber. | 14th Jun 1929 | Box 14 \ 8 Scan143 | |
| Blueprint for a rubber engine feet distance piece. | 14th Jun 1929 | Box 14 \ 8 Scan144 | |
| The back of a document with a purple ink date stamp. | 14th Jun 1929 | Box 14 \ 8 Scan145 | |
| Engine suspension issues with rubber mounts and a note on reverting to fabric engine couplings. | 21th Jun 1929 | Box 14 \ 8 Scan146 | |
| The failures of fabric couplings and testing of alternative riveting methods to improve durability. | 21th Jun 1929 | Box 14 \ 8 Scan147 | |
| List of answers to questions about the weight, performance, and fitting of body subframes. | 21th Jun 1929 | Box 14 \ 8 Scan148 | |
| Page 4 of a report on vehicle construction, covering jigs, subframe mounting, sealing, and door adjustments. | 2nd May 1929 | Box 14 \ 8 Scan149 | |
| Agreed modifications to subframes for mounting SS and India bodies onto chassis. | 2nd May 1929 | Box 14 \ 8 Scan150 | |
| Difficulties of fitting coachbuilt S.S. bodies and proposing a chassis-like rig to ensure a proper fit. | 22th Apr 1929 | Box 14 \ 8 Scan151 | |
| Scheme to supply subframe brackets and templates to coachbuilders for correct fitting. | 29th Apr 1929 | Box 14 \ 8 Scan152 | |
| Subframe and chassis interchangeability for S.S. models and the relationship with coachbuilders. | 29th Apr 1929 | Box 14 \ 8 Scan153 | |
| Challenges of providing information to coachbuilders for new car bodies due to secrecy and experimental drawings. | 1st May 1929 | Box 14 \ 8 Scan154 | |
| Difficulties with mounting subframes for S.S. bodies and proposed solutions. | 1st May 1929 | Box 14 \ 8 Scan155 | |
| Blueprint of a mechanical component with handwritten annotations suggesting modifications. | 21th Jun 1929 | Box 14 \ 8 Scan156 | |
| Secret memo discussing subframe and chassis interchangeability for 'S.S.' bodies. | 28th Apr 1929 | Box 14 \ 8 Scan157 | |
| Process of providing information to coachbuilders for mounting vehicle bodies. | 29th Apr 1929 | Box 14 \ 8 Scan158 | |
| Letter from the American branch asking a series of questions about the design and effects of a body subframe. | 10th Jun 1929 | Box 14 \ 8 Scan159 | |
| The second page of a letter from Maurice Olley posing questions about subframe design and implementation. | 1st Jul 1929 | Box 14 \ 8 Scan160 | |
| On improvements to 'SS' cars, remaining issues with noise and fumes, and proposed comparative tests against a Phantom. | 1st Jul 1929 | Box 14 \ 8 Scan161 | |
| Wheel arch clearance issues and testing for the 'WJ' series. | 9th Mar 1929 | Box 14 \ 8 Scan162 | |
| Instructions for modifying wheel arches on bodies under construction and future testing proposals. | 1st Sep 1929 | Box 14 \ 8 Scan163 | |
| Troubles and investigations into rear wheel arch clearance, comparing the W.J. series and Phantom chassis. | 5th Sep 1929 | Box 14 \ 8 Scan164 | |
| Vehicle roll testing, spring deflection, and wheel arch clearance for the Phantom and other models. | 5th Sep 1929 | Box 14 \ 8 Scan165 | |
| Insufficient rear axle clearance on the Phantom II chassis due to sub-frame fixing issues. | 26th Sep 1929 | Box 14 \ 8 Scan166 | |
| Fouling issues with the rear wheel arch clearances on the Phantom II model. | 2nd Oct 1929 | Box 14 \ 8 Scan167 | |
| Wheel arch clearance issues and fouling on experimental Phantom II cars. | 1st Oct 1929 | Box 14 \ 8 Scan168 | |
| Increasing clearance by modifying the off-side rear wheel arch on chassis 20-EX. | 1st Oct 1929 | Box 14 \ 8 Scan169 | |
| Wheel arch clearance tests and solutions for brake and tyre fouling issues. | 1st Oct 1929 | Box 14 \ 8 Scan170 | |
| Recommendations for modifying subframes, brake shoe fulcrum pins and nuts, and a report on a rear spring clip fouling issue. | 1st Oct 1929 | Box 14 \ 8 Scan171 | |
| Diagram illustrating a Phantom II subframe modification to increase wheel arch clearance. | 1st Oct 1929 | Box 14 \ 8 Scan172 | |
| Diagram showing a modification to a Phantom II subframe to increase wheel arch clearance. | 26th Oct 1929 | Box 14 \ 8 Scan173 | |
| Wheel arch clearances, specifically in relation to rear seat accommodation and tyre rubbing. | 26th Oct 1929 | Box 14 \ 8 Scan174 | |
| Concerns with Coachbuilder modifications to Phantom II subframes for brake drum clearance. | 5th Dec 1929 | Box 14 \ 8 Scan175 | |
| Revised subframe design for the Phantom II, incorporating a new steering system and other modifications. | 7th Dec 1929 | Box 14 \ 8 Scan176 | |
| Phantom II subframes, attaching a copy of a report received from a tester. | 10th Dec 1929 | Box 14 \ 8 Scan177 | |
| Required modifications to the sub-frame for clearance to rear brake drums on chassis 49-WJ. | 10th Dec 1929 | Box 14 \ 8 Scan178 | |
| Various issues and recommendations regarding the Phantom II subframe. | 10th Dec 1929 | Box 14 \ 8 Scan179 | |
| Modifications to the frame and a universal subframe for various coachbuilders. | 14th Nov 1929 | Box 14 \ 8 Scan180 | |
| Decision to not alter Phantom II subframes until further notice from the Experimental Department. | 12th Dec 1929 | Box 14 \ 8 Scan181 | |
| Brake drum clearances for the Phantom II subframe and referencing a report by Mr. Goose. | 13th Dec 1929 | Box 14 \ 8 Scan182 | |
| Issues and modifications related to the Phantom II subframes. | 13th Dec 1929 | Box 14 \ 8 Scan183 | |
| Subframe clearance issues and required alterations for the Phantom II model. | 14th Dec 1929 | Box 14 \ 8 Scan184 | |
| Procedure detailing the method for testing subframe clearances. | 17th Dec 1929 | Box 14 \ 8 Scan185 | |
| Discrepancy in wheel arch clearances between experimental and production Phantom II subframes and proposing modifications. | 17th Dec 1929 | Box 14 \ 8 Scan186 | |
| Subframe modifications to prevent fouling with the wheel arch and procedures for centralisation. | 17th Dec 1929 | Box 14 \ 8 Scan187 | |
| Recommendation to use hard or insertion rubber as packing in place of the current aluminium discs for body adjustment. | 17th Dec 1929 | Box 14 \ 8 Scan188 | |
| Tests for stiffening the Phantom II frame to solve an issue described as 'radiator jellying'. | 18th Dec 1929 | Box 14 \ 8 Scan189 | |
| The testing and modification of rear wheel arch clearances on the Phantom II chassis. | 20th Dec 1929 | Box 14 \ 8 Scan190 | |
| The urgent distribution of prints for a wheel arch clearance modification to avoid a 'further catastrophe'. | 20th Dec 1929 | Box 14 \ 8 Scan191 | |
| Modifications to the Phantom IIa rear wheelarch and subframe for larger tyres and improved clearances. | 21th Dec 1929 | Box 14 \ 8 Scan192 | |
| Suggesting a note regarding the use of chains, a modification to the rear subframe support, and referencing issues with the Phantom II chassis. | 21th Dec 1929 | Box 14 \ 8 Scan193 | |
| Instructions and quality issues regarding Phantom II subframes. | 31th Dec 1929 | Box 14 \ 8 Scan194 | |
| Modifications to the Phantom II rear wheel arch clearance and subframes. | 23th Dec 1929 | Box 14 \ 8 Scan195 | |
| Proposed alterations for the rear wheel arch clearance on the Phantom II model. | 31th Dec 1929 | Box 14 \ 8 Scan196 | |
| The impossibility of removing the gearbox lid on Phantom II cars with close-coupled bodies. | 31th Dec 1929 | Box 14 \ 8 Scan197 | |
| Non-standard subframe on Phantom II chassis WJ-1. | 1st Jan 1930 | Box 14 \ 8 Scan198 | |
| Disadvantages of fitting larger section 'India' tyres over the standard Dunlop tyres. | 1st Jan 1930 | Box 14 \ 8 Scan199 | |
| Tyre specifications, discouraging larger sections and standardising on Fort tyres for 20' rims. | 2nd Jan 1930 | Box 14 \ 8 Scan200 | |
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