| Description | Date | Identifier | |
| Instructions to correct the compression ratio of a Phantom II high compression cylinder head by machining the joint face. | 15th Nov 1933 | Box 14 \ 3 Scan090 | |
| Providing details of the Phantom II cylinder centres. | 1st Jun 1935 | Box 14 \ 3 Scan091 | |
| Drawings and modifications for a hollow dashboard on the EAC.8 chassis. | 22th Oct 1925 | Box 14 \ 4 Scan001 | |
| Reasons for introducing a stepped dashboard and its impact on the steering column, scuttle, and bonnet. | 11th Nov 1925 | Box 14 \ 4 Scan002 | |
| Report discussing car body design, focusing on seating arrangements, passenger comfort, and tyre selection. | 11th Nov 1925 | Box 14 \ 4 Scan003 | |
| Personal opinion on tyre types and pressures for the 20 HP and Phantom models. | 17th Nov 1925 | Box 14 \ 4 Scan004 | |
| Instructing the cancellation of all designs for the 'stepped' type of dashboard following a wire from Mr. Royce. | 17th Nov 1925 | Box 14 \ 4 Scan005 | |
| Modifications required to adapt the dashboard for 'C' and 'D' type steering. | 8th Jan 1926 | Box 14 \ 4 Scan006 | |
| Redesign of a vacuum tank and its associated tap for a new dashboard. | 8th Jan 1926 | Box 14 \ 4 Scan007 | |
| Replacing the previous stepped dashboard with a new cast version for 'B' steering models. | 1st Jan 1926 | Box 14 \ 4 Scan008 | |
| Alterations to the dashboard to allow for the column to move to suit a large worm box. | 22th Jan 1926 | Box 14 \ 4 Scan009 | |
| Purchase of an Open Touring body from Barkers and an inquiry into the design progress for a Covered car. | 29th Jan 1926 | Box 14 \ 4 Scan010 | |
| Fitting of an open touring body to an EAC.VIII chassis and the design of a covered car. | 4th Feb 1926 | Box 14 \ 4 Scan011 | |
| Potential strains from increased dashboard rigidity and a proposal for testing by removing a fixing bolt. | 27th Feb 1926 | Box 14 \ 4 Scan012 | |
| Design of the EAC.7 dashboard and steering support, noting it cannot be the same as the EAC.8. | 2nd Jun 1926 | Box 14 \ 4 Scan013 | |
| Improvements to a stepped cast dashboard and modifications to the steering column support. | 10th Jun 1926 | Box 14 \ 4 Scan014 | |
| Requested modification to the steering column stay on an EAC. 8 chassis. | 12th Jun 1926 | Box 14 \ 4 Scan015 | |
| Proposed scheme for stiffening the scuttle armature on various car models. | 15th Jul 1926 | Box 14 \ 4 Scan016 | |
| Proposal for stiffening the front scuttle armature using an experimental cast dash for testing purposes. | 17th Jul 1926 | Box 14 \ 4 Scan017 | |
| Issues with bonnet fastenings and proposing an improved design using a cast dash. | 26th Nov 1926 | Box 14 \ 4 Scan018 | |
| From BJ to Hs requesting feedback on a new cast dash and bonnet design. | 29th Nov 1926 | Box 14 \ 4 Scan019 | |
| Requesting clarification on the design, cost, and implications of a new cast dash and bonnet. | 29th Nov 1926 | Box 14 \ 4 Scan020 | |
| The design and implications of a new stepped cast dash and bonnet. | 30th Nov 1926 | Box 14 \ 4 Scan021 | |
| Standardization of a cast dash and issues with bonnet fasteners and engine impulses. | 30th Nov 1926 | Box 14 \ 4 Scan022 | |
| Increased engine vibration felt through the steering column, attributed to the rigidity of a new cast dashboard. | 30th Nov 1926 | Box 14 \ 4 Scan023 | |
| Design, development, and advantages of a new cast dash and bonnet. | 1st Dec 1926 | Box 14 \ 4 Scan024 | |
| Modifications to the Phantom bonnet, including an improved fastener and changes to reduce vibration. | 12th Sep 1926 | Box 14 \ 4 Scan025 | |
| Engine vibration issues with the Phantom cast dashboard and the development of a new design. | 16th Dec 1926 | Box 14 \ 4 Scan026 | |
| Implementation of a cast dash for the Phantom model and its relation to other modifications like bonnet length and seating positions. | 17th Dec 1926 | Box 14 \ 4 Scan027 | |
| Testing, manufacturing, cost, and potential vibration issues of a cast dash for Phantom & India models. | 6th Sep 1927 | Box 14 \ 4 Scan028 | |
| Issues with a dummy Alpine Sports Chassis and proposed modifications. | 29th Dec 1927 | Box 14 \ 4 Scan029 | |
| Dash not being drilled for the scuttle and dash damper. | 16th Feb 1928 | Box 14 \ 4 Scan030 | |
| Proposals for the G.2 series Phantom, specifically the adoption of a Cast Dash. | 1st Mar 1928 | Box 14 \ 4 Scan031 | |
| Modifications to the cast dashboard for the 12-EX model. | 3rd Mar 1928 | Box 14 \ 4 Scan032 | |
| To halt production of the Continental Phantom's cast dash after tests revealed it was insufficiently rigid. | 9th Mar 1923 | Box 14 \ 4 Scan033 | |
| Technical memorandum discussing the rigidity of the cast dashboard and proposing solutions for strengthening the steering column support. | 10th Mar 1928 | Box 14 \ 4 Scan034 | |
| Continued discussion on troubleshooting dash flexing, with the steering column identified as the likely source of the trouble. | 10th Mar 1928 | Box 14 \ 4 Scan035 | |
| Blueprint showing two views of a structural component, with a note to strengthen a section against torsion. | 10th Mar 1928 | Box 14 \ 4 Scan036 | |
| Blank document page with a Print Room stamp. | 10th Mar 1928 | Box 14 \ 4 Scan037 | |
| Analysis of scuttle and bonnet vibration issues, arguing against total isolation in favour of semi-isolation. | 2nd Mar 1928 | Box 14 \ 4 Scan038 | |
| Total versus semi-isolation methods for reducing engine vibrations. | 15th Mar 1928 | Box 14 \ 4 Scan039 | |
| Strategy and development of the 15-EX Sports Model. | 15th Mar 1928 | Box 14 \ 4 Scan040 | |
| Chassis flexibility, steering column support, and aesthetic ideas for a future sports car model. | 26th Mar 1928 | Box 14 \ 4 Scan041 | |
| Proposed semi-isolation scheme for a vehicle's scuttle. | 26th Mar 1928 | Box 14 \ 4 Scan042 | |
| Use of a friction damper to resolve issues with scuttle and dashboard movement. | 27th Mar 1928 | Box 14 \ 4 Scan043 | |
| Review of issues with stiffness and mounting for 20HP & 40HP steering columns, scuttles, and dashboards. | 4th Jul 1928 | Box 14 \ 4 Scan044 | |
| Technical memorandum providing feedback on a proposal for Phantom scuttle isolation. | 20th Apr 1928 | Box 14 \ 4 Scan045 | |
| Experiments conducted on a bump rig with a cast dash to measure steering column movement. | 16th Apr 1928 | Box 14 \ 4 Scan046 | |
| Technical report discussing dash and column deflection, proposing modifications for standardization on experimental models. | 16th Apr 1928 | Box 14 \ 4 Scan047 | |
| Test results for steering column movement under various chassis conditions on a bumping rig. | 16th Apr 1928 | Box 14 \ 4 Scan048 | |
| Blueprint for an experimental stiffener for cast dash bumping tests, showing a triangulated support for the steering column. | 30th Apr 1923 | Box 14 \ 4 Scan049 | |
| Test results and recommendations for the design of the cast dashboard and steering column support. | 30th Apr 1923 | Box 14 \ 4 Scan050 | |
| Summary of impressions on steering column movement and potential solutions involving stiffeners and supports. | 30th Apr 1928 | Box 14 \ 4 Scan051 | |
| Test results for steering column movement with different rubber and solid rear engine mounting configurations. | 30th Apr 1928 | Box 14 \ 4 Scan052 | |
| Test report on the effect of radiator mounting configurations on vertical and horizontal measurements. | 20th Oct 1923 | Box 14 \ 4 Scan053 | |
| Explanatory diagrams for dashboard supports, steering column stays and stiffeners. | 20th Oct 1923 | Box 14 \ 4 Scan054 | |
| Very faded and almost illegible typed document with a purple receiving stamp. | 1st May 1928 | Box 14 \ 4 Scan055 | |
| List of parts required to convert a 15-EX chassis to 29-CL, detailing modifications for a wider and higher dashboard. | 30th May 1928 | Box 14 \ 4 Scan056 | |
| Justifying the use of semi-isolation for the scuttle based on experimental tests and customer feedback. | 15th Jun 1928 | Box 14 \ 4 Scan057 | |
| Summary of experimental findings on scuttle dampers and isolation methods, recommending a standardized scheme. | 15th Jun 1928 | Box 14 \ 4 Scan058 | |
| The support of a steering column with a cast dash. | 15th Jun 1928 | Box 14 \ 4 Scan059 | |
| Support of the steering column with a cast dash on experimental car models 12-EX and 14-EX. | 18th Jun 1928 | Box 14 \ 4 Scan060 | |
| The support of the steering column with a cast dash. | 21th Jun 1928 | Box 14 \ 4 Scan061 | |
| Agreeing to reduce the space between the dashboard and the steering wheel by half an inch for the E. steering on model 12-EX. | 23th Jun 1928 | Box 14 \ 4 Scan062 | |
| Preference for a solid cast lug on the 20 HP model, similar to that on the 40/50 HP. | 1st Jul 1928 | Box 14 \ 4 Scan063 | |
| Requesting instructions for modifications to car 12-EX in preparation for a 10,000 miles test. | 18th Jul 1928 | Box 14 \ 4 Scan064 | |
| Modifications for the Phantom G.2.B series scuttle isolation. | 19th Jul 1928 | Box 14 \ 4 Scan065 | |
| Parts awaiting design, a proposed large 6-seater chauffeur-driven body, and specific design details for the radiator and scuttle. | 28th Aug 1928 | Box 14 \ 4 Scan066 | |
| Outlining the specifications for different types of driving seat positions and related controls. | 28th Aug 1928 | Box 14 \ 4 Scan067 | |
| Standardisation of chassis parts by fitting the engine further forward with a cast type dashboard to improve body space. | 2nd May 1928 | Box 14 \ 4 Scan068 | |
| Standardisation form detailing the requirements for fitting a new part to a chassis. | 12th Nov 1928 | Box 14 \ 4 Scan069 | |
| Construction of 'SS' floorboards over the clutch pit. | 27th Oct 1928 | Box 14 \ 4 Scan070 | |
| Suggesting a rearrangement of the 'SS' dashboard and components to maximize the height for the autovac tank. | 11th Nov 1928 | Box 14 \ 4 Scan071 | |
| Scuttle clearance, body mounting rigidity, and a proposed dashboard modification. | 2nd Mar 1929 | Box 14 \ 4 Scan072 | |
| Scuttle armature fouling on experimental cars causing the body to boom, and a request for a future design solution. | 26th Jun 1929 | Box 14 \ 4 Scan073 | |
| Revisions to the radiator, bonnet, and dash for Sir Henry Segrave's Phantom II car. | 31th Jan 1930 | Box 14 \ 4 Scan074 | |
| Note about sending a modified dashboard shape for a Continental Touring Car to the Derby factory. | 4th Feb 1930 | Box 14 \ 4 Scan075 | |
| Internal memorandum detailing revised bonnet and dash specifications for the Phantom II. | 4th Feb 1930 | Box 14 \ 4 Scan076 | |
| Revised bonnet and dash design for the Phantom model, including radiator options and comparisons between Phantom I and P.2 chassis. | 10th Feb 1930 | Box 14 \ 4 Scan077 | |
| Proposed design modifications to the radiator and bonnet, known as the Segrave Experiment, to address coachbuilder feedback. | 13th Feb 1930 | Box 14 \ 4 Scan078 | |
| Proposed design modifications for the Phantom II bonnet, dash, and radiator. | 13th Feb 1930 | Box 14 \ 4 Scan079 | |
| Improved bonnet and dashboard design for the Phantom II model. | 27th Feb 1930 | Box 14 \ 4 Scan080 | |
| Proposed modified bonnet, radiator, and dashboard for the 20/25 HP and Phantom II models. | 14th Mar 1930 | Box 14 \ 4 Scan081 | |
| Modifications and improvements to the floorboards for the Phantom II and 25 HP models. | 19th Jun 1930 | Box 14 \ 4 Scan082 | |
| Extract concerning coachbuilder complaints about dashboard alignment and a note on floorboard stiffening. | 15th Jul 1930 | Box 14 \ 4 Scan083 | |
| Alteration to the bonnet and dash for the 'N2' series chassis. | 22th Jul 1930 | Box 14 \ 4 Scan084 | |
| Approving alterations to the bonnet, dash and instrument board, authorizing material orders to prevent delays. | 23th Jul 1930 | Box 14 \ 4 Scan085 | |
| Urgent request to expedite supplies of hard and soft type dashboard isolation rubbers for Phantom II & 20/25HP chassis. | 23th Jul 1930 | Box 14 \ 4 Scan086 | |
| Comparing two design schemes for a universal dashboard, preferring scheme 3193 over 1413. | 8th Jan 1931 | Box 14 \ 4 Scan087 | |
| Approval of a dashboard pattern design. | 17th Jan 1931 | Box 14 \ 4 Scan088 | |
| Standardisation of a shallow tank radiator, wider dashboard, and bonnet overlapping the dashboard to improve the car's appearance. | 24th Jul 1930 | Box 14 \ 4 Scan089 | |
| Implementation of a new standardized chassis part, its costs, and the chassis series it applies to. | 17th Dec 1928 | Box 14 \ 4 Scan090 | |
| Suggesting a cheaper method for making chassis floorboards using metal-faced wood called 'Plymax'. | 20th Apr 1931 | Box 14 \ 4 Scan091 | |
| The fitting of steadying stays for a side wheel carrier on a Phantom II chassis. | 3rd Sep 1931 | Box 14 \ 4 Scan092 | |
| Engine suspension, comparing a front suspension arm made from a sheet metal pressing with one made from a forging. | 23th Dec 1925 | Box 14 \ 5 Scan001 | |
| Metallurgy of engine suspension components, comparing the effects of brazing versus welding on nickel steel. | 10th Mar 1926 | Box 14 \ 5 Scan002 | |
| Alteration to the torque reaction dampers. | 15th Sep 1926 | Box 14 \ 5 Scan003 | |
| Location and design of the torque arm to prevent interference ('quarreling') on the 40/50 HP chassis. | 13th Dec 1926 | Box 14 \ 5 Scan004 | |
| Blueprint detailing the location and path of a 40/50 model Torque Arm. | 10th Dec 1926 | Box 14 \ 5 Scan005 | |
| Engine detonation, pre-ignition, and misfire issues with an aluminum high-compression engine. | 29th Dec 1927 | Box 14 \ 5 Scan006 | |
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