| Description | Date | Identifier | |
| Sketch showing a fracture in an off-side frame member sustained during road tests in France. | 25th Jan 1926 | Box 67 \ 1 scan0164 | |
| The condition of a Barker Limousine body after a 14,000-mile test in France. | 1st Feb 1926 | Box 67 \ 1 scan0165 | |
| Faults and necessary modifications for various vehicle components. | 26th Feb 1926 | Box 67 \ 1 scan0166 | |
| Step iron and front mud-guard stay failures on 20 HP & 40/50 HP models. | 26th Feb 1926 | Box 67 \ 1 scan0167 | |
| Letter acknowledging receipt of a report on a breaking O.S. Frame. | 10th Feb 1926 | Box 67 \ 1 scan0168 | |
| Design improvements for step irons, wing stays, a spare wheel carrier, and a luggage grid. | 19th Feb 1926 | Box 67 \ 1 scan0169 | |
| Status of experimental cars related to a luggage grid extension for the New Phantom. | 1st Mar 1926 | Box 67 \ 1 scan0170 | |
| Requesting a scheme for stiffening the fractured frame on the rebuilt 8-EX car. | 18th Mar 1926 | Box 67 \ 1 scan0171 | |
| Desirability and urgency of designing sub-frames for 40/50 and 20 HP models. | 22th Apr 1926 | Box 67 \ 1 scan0172 | |
| Views and experiences with body subframe mounting, comparing rigid and elastic systems. | 10th May 1926 | Box 67 \ 1 scan0173 | |
| Table listing car models, chassis numbers, body types, service details, and weight measurements with handwritten annotations. | 10th May 1926 | Box 67 \ 1 scan0174 | |
| Vehicle body life and weight, comparing different coachbuilders and construction methods based on road trials. | 10th May 1926 | Box 67 \ 1 scan0175 | |
| Subframe weights and their effect on car body production and assembly. | 10th May 1926 | Box 67 \ 1 scan0176 | |
| Report discussing the benefits of using a subframe for car bodies, including reduced delivery times, secrecy for experimental chassis, and production efficiencies. | 10th May 1926 | Box 67 \ 1 scan0177 | |
| Subframe defects, engine compression ratios, and their effect on noisy and booming car bodies. | 10th May 1926 | Box 67 \ 1 scan0178 | |
| The vibration-damping performance of a subframe body mounted on a New Phantom chassis. | 29th May 1926 | Box 67 \ 1 scan0179 | |
| Standardisation of a stiffener for the rear spring buffer. | 29th May 1926 | Box 67 \ 1 scan0180 | |
| Scuttle flexibility issues on a 40/50 HP car, model 7.EX, belonging to Mr. Royce. | 26th Jun 1926 | Box 67 \ 1 scan0181 | |
| Report discussing bodywork improvements for rigidity, including the hood, door pillars, and hinges for specific car models. | 26th Jun 1926 | Box 67 \ 1 scan0182 | |
| Experimental bodies, subframe fabrication, and future body design decisions. | 29th Jun 1926 | Box 67 \ 1 scan0183 | |
| Chassis enquiry and the upcoming supply of stiffeners and subframe supports. | 15th Jul 1926 | Box 67 \ 1 scan0184 | |
| Design specifications for the Sports Phantom 10-EX, covering wings, lamps, and coordination with coachbuilders. | 17th Jul 1926 | Box 67 \ 1 scan0185 | |
| Requesting a deflection and weight test on Phantom and 20 HP frames for body distortion analysis. | 19th Jul 1926 | Box 67 \ 1 scan0186 | |
| Modifications to the subframes for the Phantom and EAC.8 models. | 23th Jul 1926 | Box 67 \ 1 scan0187 | |
| Design change to the frame tie rods for the 40/50-HP model to reduce stress and prevent cracking. | 19th Aug 1926 | Box 67 \ 1 scan0188 | |
| Procedure and results of frame deflection tests for the 40/50 HP New Phantom and 20 HP Car. | 23th Aug 1926 | Box 67 \ 1 scan0189 | |
| Failure of Phantom step irons and proposing solutions. | 5th Mar 1927 | Box 67 \ 1 scan0190 | |
| Design and failures of stepirons on various car models, with proposals for stronger versions. | 11th Mar 1927 | Box 67 \ 1 scan0191 | |
| Mirrored internal memorandum discussing issues with carburetter flexibility, service history, and proposed modifications. | 26th Sep 1932 | Box 67 \ 1 scan0192 | |
| Design of strengthened step-irons for the Phantom model. | 25th Mar 1927 | Box 67 \ 1 scan0193 | |
| Introducing reinforced step irons for the Phantom chassis and a proposal for an extra step iron on the short chassis. | 1st Apr 1927 | Box 67 \ 1 scan0194 | |
| Lowering of the chassis frame using smaller back axle bevel gears and hypoid gears. | 6th May 1927 | Box 67 \ 1 scan0195 | |
| Internal memorandum reviewing the performance and design characteristics of the 10-EX Blue Sports Car. | 18th Aug 1927 | Box 67 \ 1 scan0196 | |
| Benefits of mounting car bodies on an underframe with rubber seatings to reduce vibrations. | 1st Oct 1927 | Box 67 \ 1 scan0197 | |
| The proven effectiveness of subframe body mounting in reducing vibration and noise, and a proposed solution for dash and scuttle movement. | 24th Oct 1927 | Box 67 \ 1 scan0198 | |
| Testing the method of carrying a car body on a separate under-frame. | 1st Nov 1924 | Box 67 \ 1 scan0199 | |
| Committee report on testing anti-sway and anti-booming devices on two different car models. | 1st Apr 1926 | Box 67 \ 1 scan0200 | |
| Desirability and urgency of developing a subframe for the 40/50 and 20 HP models. | 1st Apr 1926 | Box 67 \ 1 scan0201 | |
| New fixing available on the chassis for bumpers. | 17th Oct 1927 | Box 67 \ 1 scan0202 | |
| 4-point engine suspension test to ascertain the effect of increased frame rigidity on steering. | 25th Oct 1927 | Box 67 \ 1 scan0203 | |
| The production and fitting of front road spring components for an experimental chassis. | 26th Oct 1927 | Box 67 \ 1 scan0204 | |
| Body design change that removes the need for a sheet aluminium cover near the spare wheel. | 1st Nov 1927 | Box 67 \ 1 scan0205 | |
| The distribution of plans and parts for the sports Phantom body forward cross member and support to coachbuilders. | 11th Nov 1927 | Box 67 \ 1 scan0206 | |
| Request to create a half-size model of an 'X' shaped frame cross member for experimental testing. | 25th Nov 1927 | Box 67 \ 1 scan0207 | |
| Alternative designs for the centralised chassis lubrication system for the front axle control damper. | 12th Dec 1927 | Box 67 \ 1 scan0208 | |
| 'X' shaped 4th cross member and braking system modifications for the 20 HP car. | 3rd Dec 1927 | Box 67 \ 1 scan0209 | |
| Body and subframe choices for upcoming 10,000-mile tests on 20 HP and 40/50 chassis. | 1st Dec 1927 | Box 67 \ 1 scan0210 | |
| Design and placement of a sports toolbox and running board. | 17th Jan 1923 | Box 67 \ 1 scan0211 | |
| Wind resistance and the shaping of the body for the Continental Phantom. | 2nd Sep 1928 | Box 67 \ 1 scan0212 | |
| The supply of wing stays and step irons for a Jarvis body. | 2nd Sep 1928 | Box 67 \ 1 scan0213 | |
| Elusive knocking sound from the Phantom's rear spare wheel carrier and proposing a solution. | 9th Mar 1928 | Box 67 \ 1 scan0214 | |
| The lack of rigidity and difficult access of a rear spare wheel carrier, with suggestions for improvement. | 3rd Sep 1928 | Box 67 \ 1 scan0215 | |
| Measurements of relative movement between the body and frame side channels under load. | 9th Mar 1928 | Box 67 \ 1 scan0216 | |
| Request for the return of an experimental model frame cross member for testing. | 9th Mar 1928 | Box 67 \ 1 scan0217 | |
| Disassembly of a frame cross and proposing modifications for simplification and testing. | 22th Mar 1928 | Box 67 \ 1 scan0218 | |
| Using 'SS' style front engine arms to reduce high-speed wobbles on the Phantom model by stiffening the frame. | 7th Apr 1928 | Box 67 \ 1 scan0219 | |
| Potential introduction of sub-frames on the 40/50 HP chassis. | 14th May 1928 | Box 67 \ 1 scan0220 | |
| Necessity and urgency of designing subframes for the 40/50 and 20 HP models. | 22th Apr 1926 | Box 67 \ 1 scan0221 | |
| The results of static tests on an X-shaped cross member for improving frame rigidity and steering. | 9th May 1928 | Box 67 \ 1 scan0222 | |
| Test results for cross members on a model frame, showing deflection under various loads and configurations. | 11th May 1928 | Box 67 \ 1 scan0223 | |
| Blueprint detailing the testing method and stages for a model frame's 4th (X) cross member. | 16th May 1928 | Box 67 \ 1 scan0224 | |
| Bending and shear tests on an 'X' shaped frame cross member. | 23th May 1928 | Box 67 \ 1 scan0225 | |
| Results of bending tests on a model frame with different member configurations. | 23th May 1928 | Box 67 \ 1 scan0226 | |
| Hand-drawn diagram illustrating a load test setup on a structural component. | 23th May 1928 | Box 67 \ 1 scan0227 | |
| Model frame shearing tests with deflection measurements for different member configurations. | 4th Sep 1928 | Box 67 \ 1 scan0228 | |
| Requesting the removal of tie rods and a quick repair to a cracked side member on the bump chassis. | 4th Sep 1928 | Box 67 \ 1 scan0229 | |
| Advantages and extensive testing of body subframes on experimental cars. | 10th Nov 1928 | Box 67 \ 1 scan0230 | |
| Test of a separate underframe for mounting a car body, conducted by the Coachwork Sub-Committee. | 30th Oct 1924 | Box 67 \ 1 scan0231 | |
| Committee report on tests conducted on anti-swaying and anti-booming devices for car bodies, including the Bradburn & Wedge scheme. | 13th Nov 1928 | Box 67 \ 1 scan0232 | |
| Advantages of body subframes for reducing noise and simplifying body fitting. | 13th Nov 1928 | Box 67 \ 1 scan0233 | |
| Frame distortion tests focusing on torsional stiffness and front-end jellying. | 29th May 1931 | Box 67 \ 1 scan0234 | |
| Tests conducted to reduce 'jellying' by modifying engine mountings and damping on various car models. | 29th May 1931 | Box 67 \ 1 scan0235 | |
| Series of five graphs showing results from frame deflection and distortion tests under various conditions. | 28th May 1931 | Box 67 \ 1 scan0236 | |
| Modification to the rear upsweep of the EAC.2 frame. | 8th Feb 1924 | Box 67 \ 1 scan0237 | |
| Drawing N.sch.1824, detailing the front end of a car, including wing stays, dipping headlights, and proposed modifications. | 18th Jul 1924 | Box 67 \ 1 scan0238 | |
| Modifications to the spare wheel carrier and step iron. | 20th Aug 1924 | Box 67 \ 1 scan0239 | |
| Secret memo detailing a new, stiffer, and higher design for step irons. | 21th Aug 1924 | Box 67 \ 1 scan0240 | |
| Follow-up memo regarding modifications to a sports car body and its mounting. | 29th Aug 1925 | Box 67 \ 1 scan0241 | |
| Instructions for speed models, specifying the use of short chassis and improvements to the wings. | 23th Sep 1925 | Box 67 \ 1 scan0242 | |
| Failures of step irons and front mud-guard stays on 20 HP and 40/50 HP models. | 1st Feb 1926 | Box 67 \ 1 scan0243 | |
| Design improvements for step irons, wing stays, spare wheel carrier, and luggage grid. | 19th Feb 1926 | Box 67 \ 1 scan0244 | |
| Letter to coachbuilders Messrs. Barkers chasing an outstanding order for a set of wings and running boards. | 12th Apr 1926 | Box 67 \ 1 scan0245 | |
| Letter from coachbuilder Barker & Co. concerning a delay in receiving parts and a chassis for a Sub-frame Cab. de Ville body. | 14th Apr 1926 | Box 67 \ 1 scan0246 | |
| Letter from coachbuilder regarding parts for a Sub-frame Cab. de Ville chassis that were not sent with the vehicle. | 19th Apr 1926 | Box 67 \ 1 scan0247 | |
| Proposed wings for a Sports Phantom car, coordination with coachbuilders, and related design questions. | 17th Jul 1926 | Box 67 \ 1 scan0248 | |
| Method of attaching front wing stays to the running boards. | 30th Aug 1926 | Box 67 \ 1 scan0249 | |
| The standardisation of front wing stays for the Phantom. | 22th Nov 1926 | Box 67 \ 1 scan0250 | |
| Standardisation of front wing stays for the Phantom model, involving coachbuilders. | 4th Dec 1926 | Box 67 \ 1 scan0251 | |
| Query regarding the delivery of two sample sets of wing stays for a 40/50 HP vehicle, with a handwritten response. | 16th Dec 1926 | Box 67 \ 1 scan0252 | |
| From coachbuilder Hooper & Co. requesting the chassis number for a pair of wing stays received. | 20th Dec 1926 | Box 67 \ 1 scan0253 | |
| The standardization of front wing stays for the Phantom model. | 12th Dec 1926 | Box 67 \ 1 scan0254 | |
| Query regarding the composition of a sample pair of front wing stays for the New Phantom chassis. | 22th Dec 1926 | Box 67 \ 1 scan0255 | |
| Design and production status of combined wing stays and headlamp supports. | 17th Jan 1927 | Box 67 \ 1 scan0256 | |
| The completion of front wings and valances, awaiting collection by Hoopers. | 25th Jan 1927 | Box 67 \ 1 scan0257 | |
| Advice note from coachbuilder Hooper & Co. for a pair of front wings. | 27th Jan 1927 | Box 67 \ 1 scan0258 | |
| Rigidity and performance of 40/50 HP wing stays in response to feedback from coachbuilders. | 7th Feb 1927 | Box 67 \ 1 scan0259 | |
| Issues with 40/50 model wing stays, refuting coachbuilder criticisms, and suggesting solutions for fitting. | 15th Feb 1927 | Box 67 \ 1 scan0260 | |
| Typed memorandum discussing design considerations for wing stays, stiffeners, and wiring protection. | 23th Mar 1927 | Box 67 \ 1 scan0261 | |
| The fitting of a front axle control damper and torque control scheme to the 40/50 HP chassis and its conflict with the front wing stays. | 23th Mar 1927 | Box 67 \ 1 scan0262 | |
| Proposed modifications to the wing stays and bonnet catch for the Phantom model, referencing several drawings. | 5th May 1927 | Box 67 \ 1 scan0263 | |
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