| Description | Date | Identifier | |
| Confirming the position of the engine in the frame by referencing full-sized layout drawing N.sch.2084. | 4th Nov 1925 | Box 14 \ 8 Scan001 | |
| Accompanying schematic N.sch.2090 with information to enable ordering of frame side members. | 19th Nov 1925 | Box 14 \ 8 Scan002 | |
| Drawing showing the general arrangement of the front end of the frame, detailing steering lock and clearance with balloon tyres. | 27th Nov 1925 | Box 14 \ 8 Scan003 | |
| Design of the front cross member, radiator, and suspension, referencing schematic N.sch.2103. | 10th Dec 1925 | Box 14 \ 8 Scan004 | |
| Revision to the frame side member for a 66-inch rear spring. | 22th Dec 1925 | Box 14 \ 8 Scan005 | |
| Investigations and proposals for the EAC.7 frame tie layout, referencing several schematics. | 1st Jan 1926 | Box 14 \ 8 Scan006 | |
| Rejection of a Hooper body and the urgent search for a suitable alternative for the E.A.C.VIII chassis. | 23th Jan 1926 | Box 14 \ 8 Scan007 | |
| Suggestions for the rear spring front anchorage, awaiting Mr. Royce's feedback. | 17th Feb 1926 | Box 14 \ 8 Scan008 | |
| Alternative schemes for a frame gusset for the 2nd cross member. | 17th Feb 1926 | Box 14 \ 8 Scan009 | |
| Schematics for the rear end of the EAC.7 chassis, noting differences from the EAC.1 model. | 26th Apr 1926 | Box 14 \ 8 Scan010 | |
| Pedal design and schematics for the EAC-7 car, noting clutch travel issues. | 31th May 1926 | Box 14 \ 8 Scan011 | |
| The body subframe scheme for vehicle E.A.C.VII, including welding instructions and component specifications. | 11th Jun 1926 | Box 14 \ 8 Scan012 | |
| Experimental bodies, refuting an argument about a subframe's weakness and discussing future construction. | 29th Jun 1926 | Box 14 \ 8 Scan013 | |
| Proposed experimental method for stiffening the front scuttle armature using a cast dash. | 17th Jul 1926 | Box 14 \ 8 Scan014 | |
| Modifications to rear brake operating gear and frame gussets to fit hydraulic shock dampers. | 23th Jul 1926 | Box 14 \ 8 Scan015 | |
| Modification to the frame cross members to prevent a bolt from fouling the subframe. | 23th Jul 1926 | Box 14 \ 8 Scan016 | |
| Modifications for a subframe, specifically the position of a middle support and a front support modification. | 23th Jul 1926 | Box 14 \ 8 Scan017 | |
| Modifications to Phantom and EAC. 8 subframes to address frame breakage and rubber support issues. | 23th Jul 1926 | Box 14 \ 8 Scan018 | |
| Requesting a modification to the position of a subframe's second crossmember. | 16th Aug 1926 | Box 14 \ 8 Scan019 | |
| Modification to a subframe second cross member dimension due to auxiliary seats. | 3rd Sep 1926 | Box 14 \ 8 Scan020 | |
| Drawing N.sch. 2257 for a 3rd cross member, questioning the feasibility of making sharp bends in the tube. | 1st Sep 1926 | Box 14 \ 8 Scan021 | |
| Strengthening the front and rear step irons and positioning the intermediate ones. | 1st Sep 1926 | Box 14 \ 8 Scan022 | |
| Confirming the dispatch of a subframe for EAC.7 to Messrs. Hoopers, Coachbuilders, Chelsea. | 22th Sep 1926 | Box 14 \ 8 Scan023 | |
| Standardisation of chassis parts, specifically the front wing stay. | 22th Sep 1926 | Box 14 \ 8 Scan024 | |
| Issues with step irons on various car models and proposing design improvements. | 11th Mar 1927 | Box 14 \ 8 Scan025 | |
| Confirmation note typed onto a copy of a memo regarding chassis delivery and testing arrangements. | 16th Sep 1938 | Box 14 \ 8 Scan026 | |
| Instructing the production and fitting of parts to an experimental chassis to improve steering geometry. | 2nd May 1927 | Box 14 \ 8 Scan027 | |
| Lowering the chassis frame using a smaller back axle bevel gear and a hypoid gear. | 6th May 1927 | Box 14 \ 8 Scan028 | |
| Issue of new and modified parts to improve the steering geometry on the E.A.C.7 chassis. | 4th Jun 1927 | Box 14 \ 8 Scan029 | |
| Producing frames and side members for experimental car models EAC.10 and EAC.12. | 8th Jul 1927 | Box 14 \ 8 Scan030 | |
| Request to build a half-size model of an 'X' shaped frame cross member for torsional stiffness testing. | 25th Nov 1927 | Box 14 \ 8 Scan031 | |
| The supply and fitting of step brackets and running boards for a sports chassis. | 22th Dec 1927 | Box 14 \ 8 Scan032 | |
| Issues with a dummy Alpine Sports Chassis at Hooper's, proposing modifications and requesting a correct second dummy for Barker's. | 29th Dec 1927 | Box 14 \ 8 Scan033 | |
| Arrangement of a tool box step and its associated brackets. | 30th Dec 1927 | Box 14 \ 8 Scan034 | |
| Schematic N.sch.2541, which details the front anchorage of the rear springs and brake carrier levers. | 31th Jan 1928 | Box 14 \ 8 Scan035 | |
| Recent experiments and conclusions on engine mounting. | 4th Feb 1928 | Box 14 \ 8 Scan036 | |
| Engine mounting, referencing experimental observations on torque reaction and frame distortion. | 20th Feb 1928 | Box 14 \ 8 Scan037 | |
| Stability and adjustable length of the Phantom Sports steering column. | 1st Mar 1928 | Box 14 \ 8 Scan038 | |
| Engine suspension for the EAC.10 model, particularly the use of rubber mountings to mitigate torsion from chassis frame twist. | 7th Mar 1928 | Box 14 \ 8 Scan039 | |
| Static tests of the Phantom Sports Steering Column to assess movement due to frame deflection. | 1st Mar 1928 | Box 14 \ 8 Scan040 | |
| Static stiffness tests on a Continental Phantom frame, measuring frame deflection and steering column movement. | 9th Mar 1928 | Box 14 \ 8 Scan041 | |
| Experiments on frame twist and the torsional stiffness of a chassis. | 9th Mar 1928 | Box 14 \ 8 Scan042 | |
| Frame twist percentages for various front wheel lift scenarios on different chassis. | 9th Mar 1928 | Box 14 \ 8 Scan043 | |
| Requesting the return of an experimental model frame cross member for testing. | 9th Mar 1928 | Box 14 \ 8 Scan044 | |
| Disassembly of a frame cross and suggesting modifications to reduce its components for testing. | 22th Mar 1928 | Box 14 \ 8 Scan045 | |
| The layout, geometry, and components for the 'SS' side steering tube. | 26th Mar 1928 | Box 14 \ 8 Scan046 | |
| Issues with a weak forward body support spring and requesting a modification for the Barker car. | 27th Mar 1928 | Box 14 \ 8 Scan047 | |
| Proposals for the rear end of the frame and its various components. | 31th Mar 1928 | Box 14 \ 8 Scan048 | |
| Modifications to the 'SS' front axle and frame, including lowering the axle and bearing options. | 4th Jul 1928 | Box 14 \ 8 Scan049 | |
| Design issues and proposals for the rear end, wheel carrier, and luggage grid of the SS. EAC.10 chassis. | 14th Apr 1928 | Box 14 \ 8 Scan050 | |
| Luggage carrier schemes and the urgent need for a rear-end chassis frame design. | 28th May 1928 | Box 14 \ 8 Scan051 | |
| Pending chassis designs and strongly recommending the use of subframes for body mounting. | 28th May 1928 | Box 14 \ 8 Scan052 | |
| Sending items N/s. chs. 2593/4 for safekeeping in relation to 'SB' Lower Appearance. | 5th May 1928 | Box 14 \ 8 Scan053 | |
| Proposal for the design of an 'SS' subframe and production of two examples for specific car bodies. | 7th May 1928 | Box 14 \ 8 Scan054 | |
| Rebuilding of chassis 15-EX with a long frame, new radiator, and 'E' type steering. | 16th May 1928 | Box 14 \ 8 Scan055 | |
| Static tests conducted on an X-shaped cross member to improve frame rigidity and steering. | 19th May 1928 | Box 14 \ 8 Scan056 | |
| Test results for a model frame cross member under various load and configuration conditions. | 11th May 1928 | Box 14 \ 8 Scan057 | |
| Diagram illustrating the method for testing a 4-inch cross member on a model frame, with a list of test procedures. | 16th May 1928 | Box 14 \ 8 Scan058 | |
| Results of bending and shear tests on an 'X' shaped frame cross member. | 23th May 1928 | Box 14 \ 8 Scan059 | |
| Model frame bending test results comparing a frame with an 'X' member to one with two extra tubular members. | 23th May 1928 | Box 14 \ 8 Scan060 | |
| Diagram illustrating a load-bearing structure with rollers and extra tubular members. | 23th May 1928 | Box 14 \ 8 Scan061 | |
| Shearing test report on a model frame, measuring deflection under load with different tubular members. | 31th May 1928 | Box 14 \ 8 Scan062 | |
| Querying frame heights and buffer clearance for model EAC.10. | 31th May 1928 | Box 14 \ 8 Scan063 | |
| Diagram comparing the frame heights for three different 40/50 HP chassis models. | 31th May 1928 | Box 14 \ 8 Scan064 | |
| The reverse of a document showing two identical Print Room date stamps from Derby. | 31th May 1928 | Box 14 \ 8 Scan065 | |
| Frame heights, modifications to the front axle, buffer clearance, and the potential use of hypoids to lower the chassis. | 1st Jun 1928 | Box 14 \ 8 Scan066 | |
| The 'SS' Battery Cross Member, providing updated schematic information and design considerations. | 15th Jun 1928 | Box 14 \ 8 Scan067 | |
| Tests and modifications to improve the steering on the 40/50 HP model, addressing high-speed wobble and ride comfort. | 5th Jul 1928 | Box 14 \ 8 Scan068 | |
| Vehicle frame stiffness, suspension damping, and handling characteristics at different speeds, comparing two experimental models. | 5th Jul 1928 | Box 14 \ 8 Scan069 | |
| Further tests concerning wheel balance, frame stiffening, and steering characteristics. | 5th Jul 1928 | Box 14 \ 8 Scan070 | |
| Graph plotting torque versus twist angle to compare the torsional rigidity of different frame configurations. | 5th Jul 1928 | Box 14 \ 8 Scan071 | |
| Blank document page with a Print Room receipt stamp. | 5th Jul 1928 | Box 14 \ 8 Scan072 | |
| Blueprint of an X-shaped cross-member fitted to the 10-EX chassis. | 5th Jul 1928 | Box 14 \ 8 Scan073 | |
| Faint document page with a red ink stamp from the print room. | 5th Jul 1928 | Box 14 \ 8 Scan074 | |
| Modifications to the 'SS' brake differentials and associated components. | 28th Jul 1928 | Box 14 \ 8 Scan075 | |
| Design changes to the 'SS' radiator, cross member, and suspension, comparing alternative sketches. | 29th Aug 1928 | Box 14 \ 8 Scan076 | |
| Requesting immediate clarification on a revised front cross member to prevent work on cancelled parts. | 11th Sep 1928 | Box 14 \ 8 Scan077 | |
| The design and procurement of bodies and subframes for two EAC.10 cars. | 10th Sep 1928 | Box 14 \ 8 Scan078 | |
| The numbering of the first three EAC.10 cars and the specifications for a coachbuilder's dummy frame. | 12th Sep 1928 | Box 14 \ 8 Scan079 | |
| Schematics for the 'SS' frame, including radiator cross members, suspension, and front cross member. | 13th Sep 1928 | Box 14 \ 8 Scan080 | |
| Changing wheel and tyre sizes for the first 'SS' model to achieve a lower frame height. | 1st Sep 1928 | Box 14 \ 8 Scan081 | |
| Sketch for the 'SS' front dumb iron and front horn, with a proposed aesthetic modification. | 1st Sep 1928 | Box 14 \ 8 Scan082 | |
| Alteration of drilling on an 'X' shaped cross member in the frame. | 13th Sep 1928 | Box 14 \ 8 Scan083 | |
| Continued use of subframes, a new design for experimental cars 18-EX and 19-EX, and body production schedules. | 14th Sep 1928 | Box 14 \ 8 Scan084 | |
| Requesting four more pairs of S.S. chassis frames and detailing their production process. | 30th Oct 1928 | Box 14 \ 8 Scan085 | |
| Confirmation of a wire requesting the expected date for a subframe for chassis 18EX. | 10th Oct 1928 | Box 14 \ 8 Scan086 | |
| Telegram urgently requesting the expected delivery date for a subframe for model 18= EX. | 1st Dec 1918 | Box 14 \ 8 Scan087 | |
| From Hs. to DA/EV. regarding the delayed despatch of the subframe for 18-EX. | 18th Oct 1928 | Box 14 \ 8 Scan088 | |
| Weight of a subframe for car 18-EX and a query about ordering accessories. | 20th Oct 1928 | Box 14 \ 8 Scan089 | |
| Advising to have 1500 lbs. rear springs available for 'SS' body cars which are being fitted with subframes. | 31th Oct 1928 | Box 14 \ 8 Scan090 | |
| Use and benefits of steel underframes, and proposing to build a stock of 50 for the changeover to the SS Phantom model. | 7th Nov 1928 | Box 14 \ 8 Scan091 | |
| Confirmation of a wire regarding subframe and body production schedules and delivery dates. | 9th Nov 1928 | Box 14 \ 8 Scan092 | |
| The delivery schedule for subframes promised to London for Hoopers. | 1st Nov 1928 | Box 14 \ 8 Scan093 | |
| Confirming a telegram and telephone conversations regarding the dispatch schedule for experimental subframes and the acceptance of an enclosed limousine body from Hoopers. | 10th Nov 1928 | Box 14 \ 8 Scan094 | |
| Hooper enclosed limousine body for the 3rd 'SS' chassis 20-KX, detailing subframe delivery and completion deadlines. | 12th Nov 1928 | Box 14 \ 8 Scan095 | |
| The advantages of using body subframes for reducing noise and simplifying body fitting. | 13th Nov 1928 | Box 14 \ 8 Scan096 | |
| Arrangement for the collection of two sub-frames by coachbuilders Barkers and Hoopers for specific car numbers. | 10th Dec 1927 | Box 14 \ 8 Scan097 | |
| Request to make a subframe to schedule N.sch.2695 for chassis 23.EX. | 13th Dec 1928 | Box 14 \ 8 Scan098 | |
| Analysis of 'radiator shiver' and vibrations relating to the axle, frame, and engine on the 20 HP model. | 17th Dec 1928 | Box 14 \ 8 Scan099 | |
| 'SS' Subframe, modifications for experimental chassis 23-EX and 24-EX, and print alterations. | 18th Dec 1928 | Box 14 \ 8 Scan100 | |
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