| Description | Date | Identifier | |
| Approving the colour scheme for a Barkerlite Coupe limousine and arranging for the bonnet to be sent for painting. | 1st Jul 1928 | Box 102 \ 6 scan0069 | |
| Telegram concerning the urgent delivery of a bonnet for a Barkers Coupe Limousine required for cellulosing. | 24th Jul 1928 | Box 102 \ 6 scan0070 | |
| Confirmation of wire regarding the requirement for Barker's to have a bonnet cellulosed to match fabric. | 24th Jul 1928 | Box 102 \ 6 scan0071 | |
| Telegram regarding the requirement for a bonnet to be cellulosed to match fabric. | 24th Jul 1928 | Box 102 \ 6 scan0072 | |
| Coachbuilding error concerning the paint and fabric on a Coupe Limousine's bonnet and scuttle. | 14th Aug 1928 | Box 102 \ 6 scan0073 | |
| Paint colour error on a Coupe Limousine for Mr. Royce. | 22th Aug 1928 | Box 102 \ 6 scan0074 | |
| Reasons for monitoring coachbuilders and outlining the division of responsibilities for body construction. | 24th Sep 1928 | Box 102 \ 6 scan0075 | |
| Design and standardization of bonnets for Phantom and SS models. | 24th Sep 1928 | Box 102 \ 6 scan0076 | |
| Design criticisms and modifications for bonnets on the India 3 and Twenty models. | 24th Sep 1928 | Box 102 \ 6 scan0077 | |
| Alteration of a Sedanca scuttle by coachbuilder Hoopers for chassis 14-G-4. | 27th Sep 1928 | Box 102 \ 6 scan0078 | |
| Halting work on a 20 HP chassis due to a modified bonnet being 4 1/4 inches longer than standard. | 5th Oct 1928 | Box 102 \ 6 scan0079 | |
| Potential service issue with the 20-HP new type shutter control mechanism. | 30th Oct 1928 | Box 102 \ 6 scan0080 | |
| Modifications to the 20 HP chassis bonnet and dash, and its impact on material for 'O' Series and an experimental car. | 5th Nov 1928 | Box 102 \ 6 scan0081 | |
| Minor modification to the 20 HP car's bonnet and dash, suggesting a decision be made from drawings. | 11th Nov 1928 | Box 102 \ 6 scan0082 | |
| New design for bonnet fasteners and locks, and its potential use on trials cars. | 6th Nov 1928 | Box 102 \ 6 scan0083 | |
| Standardisation of chassis parts, specifically a modification to the bonnet lines. | 6th Nov 1928 | Box 102 \ 6 scan0084 | |
| Form detailing chassis part fitting, testing date, and associated costs. | 25th May 1929 | Box 102 \ 6 scan0085 | |
| Modified bonnet, radiator, and dash for a 25 HP chassis, referencing a similar design for the Phantom II. | 4th Nov 1929 | Box 102 \ 6 scan0086 | |
| Secret memorandum discussing design improvements for the dashboard and bonnet of the 20/25 HP chassis. | 27th Feb 1930 | Box 102 \ 6 scan0087 | |
| Modification of a 20 HP dashboard and radiator due to sales not agreeing with the bonnet curves. | 27th Feb 1930 | Box 102 \ 6 scan0088 | |
| Request to send a bonnet to the coachbuilders for cellulosing to ensure a correct color match. | 26th Apr 1930 | Box 102 \ 6 scan0089 | |
| Delay in supplying bonnets for the 20 HP and Phantom II chassis. | 28th Apr 1930 | Box 102 \ 6 scan0090 | |
| Supply arrangements for bonnet locks on 40/50 HP and 20/25 HP chassis. | 2nd Jun 1930 | Box 102 \ 6 scan0091 | |
| Scheme for a concealed bonnet side hinge for P.2 and 25 HP models. | 28th Jun 1930 | Box 102 \ 6 scan0092 | |
| Revisions to the bonnet and dash for the 20/25 HP model, including modifications to the radiator. | 16th Aug 1930 | Box 102 \ 6 scan0093 | |
| Tests conducted on a Phantom II to determine if a louvered bonnet improves cooling and reduces overheating during hill climbs. | 8th Oct 1930 | Box 102 \ 6 scan0094 | |
| Modifications required to fit a revised radiator and bonnet due to changes in the scuttle design on a Phantom II. | 10th Oct 1930 | Box 102 \ 6 scan0095 | |
| Requesting a progress update on experiments for adjustable pedal stems, concealed bonnet hinges, and bonnet modifications. | 11th Oct 1930 | Box 102 \ 6 scan0096 | |
| Arrangement of the bonnet over the dashboard for the Phantom II N.2 Series. | 13th Oct 1930 | Box 102 \ 6 scan0097 | |
| The status of experiments on adjustable pedal stems, concealed bonnet hinges, and a bonnet modification. | 13th Oct 1930 | Box 102 \ 6 scan0098 | |
| Improvements for radiators and bonnets, specifically regarding square tubes, overflow valves, and bonnet vents. | 14th Oct 1930 | Box 102 \ 6 scan0099 | |
| Criticisms and potential design improvements for car bonnets and radiators. | 25th Oct 1930 | Box 102 \ 6 scan0100 | |
| Design suggestions for a detachable filler cap, horizontal louvres, and bonnet sides. | 25th Oct 1930 | Box 102 \ 6 scan0101 | |
| And seeking clarification on design choices for radiators, tubes, and bonnet vents. | 27th Oct 1930 | Box 102 \ 6 scan0102 | |
| Performance and cost of square vs round radiator tubes and bonnet ventilation design. | 30th Oct 1930 | Box 102 \ 6 scan0103 | |
| Proposed proportions for the bonnet, radiator, and dashboard for the 'Japan 3' model based on previous criticisms. | 31th Jan 1931 | Box 102 \ 6 scan0104 | |
| Design and manufacturing changes for car bonnets, including materials, fittings, and construction methods. | 19th Feb 1931 | Box 102 \ 6 scan0105 | |
| Design and mock-up of a new bonnet, radiator, and dashboard for the 'Japan 3' project. | 19th Feb 1931 | Box 102 \ 6 scan0106 | |
| Dimensional errors found on the mock-up of the Japan II bonnet, radiator, and dash for a 20/25 HP chassis. | 19th Mar 1931 | Box 102 \ 6 scan0107 | |
| Incorrect bonnet for the Japan III project, requesting information on the error. | 20th Mar 1931 | Box 102 \ 6 scan0108 | |
| Secret memo regarding the verified dimensions of a mock-up bonnet and radiator for the Japan III project. | 24th Mar 1931 | Box 102 \ 6 scan0109 | |
| Secret memo regarding the appearance of a mock-up for the Bonnet, Radiator and Dash of the Japan III project. | 3rd Mar 1931 | Box 102 \ 6 scan0110 | |
| Revised bonnet overhanging the dash with concealed bonnet hinges. | 15th Jan 1931 | Box 102 \ 6 scan0111 | |
| Notification that a change was not sent for tooling due to a probable modification. | 27th Apr 1931 | Box 102 \ 6 scan0112 | |
| Bonnet and side wheel carrier modifications for the 20/25 'T' series and their impact on coachwork. | 6th May 1931 | Box 102 \ 6 scan0113 | |
| Proposed lengthening of the bonnet for the second half 'T' series 20/25 model and a discussion on bonnet clip options. | 8th May 1931 | Box 102 \ 6 scan0114 | |
| The design of a universal dashboard for the second half of the 'T' series 20/25. | 16th May 1931 | Box 102 \ 6 scan0115 | |
| Increasing bonnet side panel clearance on 40/50 & 25 HP models to prevent knocking. | 11th Jun 1931 | Box 102 \ 6 scan0116 | |
| Manufacture of rivetless bonnets and the issues with using steel. | 18th Jun 1931 | Box 102 \ 6 scan0117 | |
| Material choices and designs for aluminium car bonnets, including hinges, rivets, and stiffeners. | 18th Jun 1931 | Box 102 \ 6 scan0118 | |
| New rivetless aluminium bonnet design for the 20/25 model. | 23th Jun 1931 | Box 102 \ 6 scan0119 | |
| Design considerations for rivetless aluminium and steel bonnets, weighing cost, weight, and manufacturing challenges. | 8th Jul 1931 | Box 102 \ 6 scan0120 | |
| Design proposal for a rivetless steel bonnet, showing sections of the top and side hinges. | 15th Aug 1931 | Box 102 \ 6 scan0121 | |
| Feedback on a new front engine and radiator support design for a 25 HP model, changed due to a deeper radiator. | 15th Aug 1931 | Box 102 \ 6 scan0122 | |
| Design and production of rivet-less aluminium bonnets. | 20th Aug 1931 | Box 102 \ 6 scan0123 | |
| Requesting instructions to fit a 25 HP rivetless bonnet to vehicle 18-G4. | 3rd Sep 1931 | Box 102 \ 6 scan0124 | |
| Proposals for longer and rivetless bonnets for the 25 HP model. | 28th Nov 1931 | Box 102 \ 6 scan0125 | |
| Design of longer bonnets for the 25 HP chassis. | 30th Nov 1931 | Box 102 \ 6 scan0126 | |
| Technical memo discussing the lengthening of bonnets for the 25 HP model. | 12th Mar 1931 | Box 102 \ 6 scan0127 | |
| The design and introduction of longer bonnets for the 25 HP series cars. | 3rd Dec 1931 | Box 102 \ 6 scan0128 | |
| Standardisation of flip flap type bonnet ventilators similar to Phantom to overcome overheating. | 5th Oct 1931 | Box 102 \ 6 scan0129 | |
| Standardisation document detailing the fitting of a new part to chassis 101 in 'T'. | 4th Dec 1931 | Box 102 \ 6 scan0130 | |
| The design and production of longer bonnets for the 25 HP chassis. | 4th Dec 1931 | Box 102 \ 6 scan0131 | |
| Proposed modifications to the 25HP car bonnet, including lengthening and using different hinges and fasteners. | 5th Dec 1931 | Box 102 \ 6 scan0132 | |
| Design requirements for longer bonnets on the 25 HP model. | 8th Dec 1931 | Box 102 \ 6 scan0133 | |
| Requesting a report on schemes tested for steadying the side wheel carrier on P.2 and 25HP models. | 10th Dec 1931 | Box 102 \ 6 scan0134 | |
| Design and specifications for the radiator, bonnet, and dash for project J.3. | 17th Dec 1931 | Box 102 \ 6 scan0135 | |
| Request for information on shutter section design and the desirability of a loose shell design using stainless steel. | 17th Dec 1931 | Box 102 \ 6 scan0136 | |
| Radiator, bonnet, and dash design proposals for the J.3 Chassis. | 19th Dec 1931 | Box 102 \ 6 scan0137 | |
| Standardisation of longer bonnets and revised side wheel carrier stays for the P.2 and 25 HP models. | 21th Dec 1931 | Box 102 \ 6 scan0138 | |
| Standardisation of longer car bonnets. | 21th Dec 1931 | Box 102 \ 6 scan0139 | |
| The fit and stress issues of the overhanging bonnet on the 20/25 HP and Phantom II models. | 18th Mar 1932 | Box 102 \ 6 scan0140 | |
| Urgent request for instructions on fitting bonnet locks to J.3. | 3rd Sep 1932 | Box 102 \ 6 scan0141 | |
| Test report on under-bonnet temperatures for model 19-G-IV on the road with a plain bonnet fitted. | 11th Oct 1932 | Box 102 \ 6 scan0142 | |
| Table recording water temperature, under bonnet air temperature, and atmospheric temperature over time. | 11th Oct 1932 | Box 102 \ 6 scan0143 | |
| Results of a second temperature test with a revised thermometer position near the exhaust manifold. | 8th Jan 1932 | Box 102 \ 6 scan0144 | |
| Standardisation of chassis parts for a rivetless bonnet. | 8th Jan 1932 | Box 102 \ 6 scan0145 | |
| Standardisation of chassis parts form detailing costs and approvals for a new bonnet part. | 24th Jan 1932 | Box 102 \ 6 scan0146 | |
| Standardization of a new bonnet stop design for the 20/25 HP chassis. | 9th Jan 1934 | Box 102 \ 6 scan0147 | |
| Modifications to car bonnets to prevent denting and improve support. | 22th Nov 1932 | Box 102 \ 6 scan0148 | |
| The requirement for special bonnet stops on the 20/25 chassis. | 12th Jan 1934 | Box 102 \ 6 scan0149 | |
| Request to make and fit a standard 20/25HP non-louvred bonnet to car 21.G.4. | 15th Jun 1934 | Box 102 \ 6 scan0150 | |
| Reduction and design of louvered bonnets for the 20/25 HP model. | 22th Oct 1935 | Box 102 \ 6 scan0151 | |
| Potential issues with the fixing and painting of dummy louvres by coachbuilders. | 3rd Jul 1939 | Box 102 \ 6 scan0152 | |
| Transition from FBA to BZ brake lining material. | 3rd Jul 1939 | Box 102 \ 6 scan0153 | |
| Recommending a wholesale changeover to BZ type brake liners for various car models. | 20th Jun 1939 | Box 102 \ 6 scan0154 | |
| Order for parts to fix Bentley brake thumps and a modification to the fitting process. | 12th Jun 1939 | Box 102 \ 6 scan0155 | |
| Successful fitting of a hydraulic brake damper to a Bentley II to eliminate brake thumps and ordering more parts. | 9th Jun 1939 | Box 102 \ 6 scan0156 | |
| Solution for 'brake thumps' on the Bentley II model. | 23th Jan 1939 | Box 102 \ 6 scan0157 | |
| Forwarding a worn brake actuating shaft for examination due to peculiar wear, possibly from an electrical effect. | 15th Jun 1938 | Box 102 \ 6 scan0158 | |
| Stocking policy for relined brake shoes for various car models. | 8th Jun 1938 | Box 102 \ 6 scan0159 | |
| Return of a Bentley anti-judder device set incorrectly made in aluminium bronze. | 6th May 1937 | Box 102 \ 6 scan0160 | |
| Seizure of the brake mechanism on Bentley 3 1/2 & 4 1/4 Litre chassis, and suggesting modifications. | 5th Jan 1938 | Box 102 \ 6 scan0161 | |
| Improvements to brake shoe and front brake mechanisms to reduce cost and difficulty. | 5th Jan 1938 | Box 102 \ 6 scan0162 | |
| Complaint of seizing Bentley rear brakes and the subsequent modification to the shoe clearance. | 18th Oct 1937 | Box 102 \ 6 scan0163 | |
| Requesting an update on the production status of a redesigned spring for the pilot shoe of Bentley Brakes. | 12th Oct 1937 | Box 102 \ 6 scan0164 | |
| Use and cost-effectiveness of cadmium plating on steel bushes for rear brakes. | 9th Dec 1936 | Box 102 \ 6 scan0165 | |
| Test report on a modified lubrication system for Bentley rear brake actuating shafts. | 10th Dec 1936 | Box 102 \ 6 scan0166 | |
| Complaint regarding Bentley rear brake shoes seizing on the anchorage steel tube due to rusting. | 5th Dec 1936 | Box 102 \ 6 scan0167 | |
| Customer complaint about squeaking brakes on a Bentley, Chassis B.161.HM. | 10th Mar 1938 | Box 102 \ 6 scan0168 | |
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