| Description | Date | Identifier | |
| Standardisation of screws fixing bonnet strips for 20 HP and 40/50 HP chassis. | 24th Sep 1923 | Box 66 \ 3 scan0076 | |
| Standardisation of bolts for bonnet catch and handle. | 25th Sep 1923 | Box 66 \ 3 scan0077 | |
| Secret memo regarding alterations to the bonnet drawings for the EAC car. | 7th Jun 1924 | Box 66 \ 3 scan0078 | |
| Drawings for a bonnet for an EAC Car, requesting a dummy radiator and bonnet to new dimensions. | 18th Jun 1924 | Box 66 \ 3 scan0079 | |
| Secret memo providing feedback on the dimensions of a model radiator and bonnet. | 18th Jul 1924 | Box 66 \ 3 scan0080 | |
| Despatch of a dummy bonnet for the EAC car to Lillie Hall. | 25th Jun 1924 | Box 66 \ 3 scan0081 | |
| Secret memorandum discussing design revisions for a sports touring car and proposals for body styles. | 25th Jul 1924 | Box 66 \ 3 scan0082 | |
| Request to find a suitable body and chassis at the coachbuilders to fit a mock-up of the bonnet, radiator and dash for model EAC.11. | 1st Aug 1924 | Box 66 \ 3 scan0083 | |
| Secret memo detailing proposed dimensions for the EAC.2 model's bonnet, radiator, and dashboard, and requesting a mock-up. | 1st Aug 1924 | Box 66 \ 3 scan0084 | |
| Creation of a mock-up bonnet, radiator, and dash to fit on an existing car for appearance approval. | 19th Aug 1924 | Box 66 \ 3 scan0085 | |
| Mock-up bonnet and radiator being ready for sending. | 1st Aug 1924 | Box 66 \ 3 scan0086 | |
| Modifications to the radiator, bonnet and dash, specifically increasing the height of the radiator matrix. | 1st Aug 1924 | Box 66 \ 3 scan0087 | |
| Secret memo regarding a dimension sketch for a KHANPUR contour dashboard and the supply of other components. | 15th Sep 1924 | Box 66 \ 3 scan0088 | |
| Secret memorandum detailing the design and fittings for the bonnet of model EAC.11. | 17th Sep 1924 | Box 66 \ 3 scan0089 | |
| The despatch options for a dummy chassis required for EAC.11 bodies. | 22th Sep 1924 | Box 66 \ 3 scan0090 | |
| Secret memorandum on the design challenge of ventilating polished car bonnets to solve cooling problems. | 30th Sep 1924 | Box 66 \ 3 scan0091 | |
| Secret memo confirming arrangements for building and viewing the first three sports model bodies at Barker. | 13th Oct 1924 | Box 66 \ 3 scan0092 | |
| Requirement for louvered bonnets on chassis for India, Switzerland, and Australia. | 23th Apr 1925 | Box 66 \ 3 scan0093 | |
| Use of louvered bonnets on the 'New Phantom', citing noise issues and aesthetic considerations. | 1st Jul 1925 | Box 66 \ 3 scan0094 | |
| Modifications to the bonnet and radiator line on Mr. Royce's car following his criticism. | 6th Jul 1925 | Box 66 \ 3 scan0095 | |
| Suggestion for the alteration in the design and shape of louvred bonnets for the New Phantom model. | 14th Jul 1925 | Box 66 \ 3 scan0096 | |
| The disapproval of bonnet louvres on Mr. Royce's car and a request for alternative designs. | 14th Jul 1925 | Box 66 \ 3 scan0097 | |
| Abandoning a new bonnet clip design in favour of existing types for Mr. Royce's car. | 1st Aug 1925 | Box 66 \ 3 scan0098 | |
| Design and fitting of new bonnet louvres for the Phantom model. | 8th Aug 1925 | Box 66 \ 3 scan0099 | |
| The design of louvered bonnets for the New Phantom to prevent overheating. | 18th Aug 1925 | Box 66 \ 3 scan0100 | |
| Instructions regarding the completion and testing of a new Phantom louvred bonnet. | 1st Sep 1925 | Box 66 \ 3 scan0101 | |
| Requesting the date a 'New Phantom' with a louvred bonnet will be in London for an inspection. | 4th Sep 1925 | Box 66 \ 3 scan0102 | |
| New Phantom louvered bonnet, its fitting, and arrangements for viewing. | 15th Sep 1925 | Box 66 \ 3 scan0103 | |
| Request to replace unapproved sheet metal bonnet handles with cast nickel silver ones on chassis 7-EX. | 23th Sep 1925 | Box 66 \ 3 scan0104 | |
| Design and effectiveness of louvred bonnets compared to shutters, with a suggestion from Mr. Royce. | 23th Sep 1925 | Box 66 \ 3 scan0105 | |
| From Hs to DA asking for clarification on the design for louvred bonnets. | 28th Sep 1925 | Box 66 \ 3 scan0106 | |
| Design and manufacturing process for bonnet louvres, including a hand-drawn diagram. | 29th Sep 1925 | Box 66 \ 3 scan0107 | |
| 'New Phantom' 10,000-mile test in France and the fitting of a louvred bonnet. | 6th Oct 1925 | Box 66 \ 3 scan0108 | |
| Efficiency and noise levels of louvred versus shuttered bonnets for the New Phantom test car. | 7th Oct 1925 | Box 66 \ 3 scan0109 | |
| New louvered bonnet design for the Phantom model, for comparison purposes. | 7th Oct 1925 | Box 66 \ 3 scan0110 | |
| Bonnet closure difficulties and a suggested alteration to the shutter control lever on Phantom cars. | 9th Oct 1925 | Box 66 \ 3 scan0111 | |
| Expressing disappointment with the current 'ugly' and 'coarse' bonnet louvres and urging for the approval of a new design for the 'New Phantom'. | 9th Oct 1925 | Box 66 \ 3 scan0112 | |
| Telegram requesting a new louvred bonnet to be sent with a car to London. | 25th Oct 1925 | Box 66 \ 3 scan0113 | |
| Delayed completion and sampling of a new louvred bonnet for a Phantom car. | 28th Oct 1925 | Box 66 \ 3 scan0114 | |
| Confirming that louvred bonnets are not standard and only for special cases like hot climates or mountain climbing. | 11th Dec 1925 | Box 66 \ 3 scan0115 | |
| Complaints about the ugly design of the Phantom's bonnet and the potential for a new louvered version. | 29th Jan 1926 | Box 66 \ 3 scan0116 | |
| Standardization of a spare wheel carrier for present production cars, comparing single and double arm types. | 2nd Feb 1926 | Box 66 \ 3 scan0117 | |
| Comparative cooling efficiency tests on new louvred bonnets for the Phantom model. | 1st Feb 1926 | Box 66 \ 3 scan0118 | |
| Requesting a sample of a new Phantom louvred bonnet for inspection and fitting to a car. | 5th Feb 1926 | Box 66 \ 3 scan0119 | |
| Effect of louvred bonnets on scuttle ventilation. | 9th Feb 1926 | Box 66 \ 3 scan0120 | |
| Correspondence regarding the dispatch and required modifications for a new louvered bonnet for a Phantom model. | 10th Feb 1926 | Box 66 \ 3 scan0121 | |
| The inspection and testing of a new louvred bonnet design for the Phantom model. | 12th Feb 1926 | Box 66 \ 3 scan0122 | |
| Standardisation document for modified louvres on the bonnet to improve appearance. | 4th Feb 1926 | Box 66 \ 3 scan0123 | |
| Unsatisfactory bonnet fasteners on car 11-EX and the subsequent modifications made to resolve the problem. | 5th Mar 1938 | Box 66 \ 3 scan0124 | |
| Broken rear clips on car 11.EX and a request for more information. | 27th Feb 1926 | Box 66 \ 3 scan0125 | |
| The modification of bonnet fasteners on car 11-EX due to a lack of range in the springs. | 5th Mar 1926 | Box 66 \ 3 scan0126 | |
| Directive on the new type of louvre for 20 HP and 40/50 HP bonnets. | 8th Mar 1926 | Box 66 \ 3 scan0127 | |
| New louvred bonnet and petrol tank for the 20 HP car. | 19th Mar 1926 | Box 66 \ 3 scan0128 | |
| Concerning an incident where a bonnet flew off the Prince of Wales' car at 70 mph. | 1st Mar 1926 | Box 66 \ 3 scan0129 | |
| Standardisation of chassis parts, specifically bonnet fasteners. | 19th Feb 1926 | Box 66 \ 3 scan0130 | |
| Probability of bonnet clip failure and the safety benefits of fitting bonnet locks. | 26th Mar 1926 | Box 66 \ 3 scan0131 | |
| Unsatisfactory performance of bonnet clips on vehicle 11-EX, prompting consideration of action following a new standardization. | 14th Apr 1926 | Box 66 \ 3 scan0132 | |
| Modification of 40/50 HP bonnet clips to prevent them from falling off. | 5th Jun 1926 | Box 66 \ 3 scan0133 | |
| Follow-up memo requesting a personal guarantee on the effectiveness of modified bonnet clips. | 12th Jun 1926 | Box 66 \ 3 scan0134 | |
| Modification and improvement of bonnet clips for the 11-EX car. | 14th Jun 1926 | Box 66 \ 3 scan0135 | |
| Modifications to the carburetter mixture control levers for the Phantom model. | 9th Sep 1926 | Box 66 \ 3 scan0136 | |
| Modified bonnet fastener design for Phantom and EAC models, including a request from Mr. Royce. | 25th Nov 1926 | Box 66 \ 3 scan0137 | |
| Modifications to the Phantom bonnet and an improved fastener to enhance operation and minimize vibration. | 9th Dec 1926 | Box 66 \ 3 scan0138 | |
| The new Phantom bonnet design, suggesting fasteners could also be used as handles. | 17th Dec 1926 | Box 66 \ 3 scan0139 | |
| Design and prototyping of a lock for a revised Phantom bonnet. | 22th Dec 1926 | Box 66 \ 3 scan0140 | |
| Revised spring for the Phantom bonnet fastener. | 23th Dec 1926 | Box 66 \ 3 scan0141 | |
| Bonnet dimensions and the condemnation of a new radiator design for the 12-EX car. | 1st Dec 1926 | Box 66 \ 3 scan0142 | |
| Blueprint showing dimensions for four different bonnet models. | 30th Dec 1926 | Box 66 \ 3 scan0143 | |
| Short typed memo from DA to Hs discussing chassis inertia and spring periodicity. | 31th Dec 1926 | Box 66 \ 3 scan0144 | |
| Handling limitations of long chassis cars in city traffic compared to shorter cars. | 1st Jan 1927 | Box 66 \ 3 scan0145 | |
| Design and improvement of bonnet clips and locks for various car models. | 1st Feb 1927 | Box 66 \ 3 scan0146 | |
| Modifications to the bonnet and radiator design. | 1st Jan 1927 | Box 66 \ 3 scan0147 | |
| Design analysis of bonnet and radiator modifications, comparing integral and non-integral options. | 1st Jan 1927 | Box 66 \ 3 scan0148 | |
| Proposed modifications to the radiator and bonnet shape to improve appearance while considering efficiency. | 1st Mar 1927 | Box 66 \ 3 scan0149 | |
| Different design schemes for a bonnet lock for the 40/50 and 20 HP models. | 1st Mar 1927 | Box 66 \ 3 scan0150 | |
| Design details and improvements for a gear wheel, pins, and bonnet fasteners. | 6th Jan 1927 | Box 66 \ 3 scan0151 | |
| Design improvements for bonnet clips and overall bonnet aesthetics. | 6th Jan 1927 | Box 66 \ 3 scan0152 | |
| Proposed modifications to the radiator and bonnet proportions for the 40/50 HP model. | 1st Jan 1927 | Box 66 \ 3 scan0153 | |
| Philosophy of gradual design alterations to the bonnet and radiator, using an analogy of the human nose. | 11th Jan 1927 | Box 66 \ 3 scan0154 | |
| Measurement correction for the 40/50 HP bonnet. | 1st Jan 1927 | Box 66 \ 3 scan0155 | |
| Radiator tube diameter and length for the 40/50 HP model bonnet and radiator. | 13th Jan 1927 | Box 66 \ 3 scan0156 | |
| Suggesting the creation of mock-up pieces for a Phantom's bonnet and radiator for appearance purposes, rather than producing full, extravagant alternative schemes. | 13th Jan 1927 | Box 66 \ 3 scan0157 | |
| Proposal discussing modifications to the 40/50 bonnet and radiator design, including changes to the tank, tubes, and shutters. | 15th Jan 1927 | Box 66 \ 3 scan0158 | |
| Request to dispatch two dummy radiators for the Phantom model to Derby. | 18th Jan 1927 | Box 66 \ 3 scan0159 | |
| Requesting rough sketches for Phantom bonnet and radiator schemes. | 18th Jan 1927 | Box 66 \ 3 scan0160 | |
| Technical memo discussing design improvements for the Phantom radiator and bonnet, specifically regarding integral shutters. | 2nd Oct 1927 | Box 66 \ 3 scan0161 | |
| Modifications to bonnet fasteners, locks, and radiator design for the 20 HP model. | 26th Nov 1919 | Box 66 \ 3 scan0162 | |
| Trials for a new bonnet lock and fastener. | 22th Mar 1927 | Box 66 \ 3 scan0163 | |
| Design improvements for the 40/50 radiator and bonnet, rejecting high shoulders for aesthetic and visibility reasons. | 22th Mar 1927 | Box 66 \ 3 scan0164 | |
| Confirming the commencement of detailing work on Phantom bonnet locks. | 1st Apr 1927 | Box 66 \ 3 scan0165 | |
| Design changes and opinions on new experimental radiators and bonnets. | 7th Apr 1927 | Box 66 \ 3 scan0166 | |
| Design considerations for bonnets and radiators, including aesthetics, functionality, and repairability. | 29th Apr 1927 | Box 66 \ 3 scan0167 | |
| Bonnet and radiator modifications for improved appearance, including louvres, radiator thickness, and bonnet shutters. | 4th May 1927 | Box 66 \ 3 scan0168 | |
| Instructing a change in bonnet production, discontinuing shutters and offering plain or louvred alternatives. | 4th May 1927 | Box 66 \ 3 scan0169 | |
| Proposed modifications for the Phantom wing stays and bonnet catch. | 5th May 1927 | Box 66 \ 3 scan0170 | |
| The merits of bonnet shutters versus louvres for the 40/50 HP chassis, considering overheating and cost. | 20th Jun 1927 | Box 66 \ 3 scan0171 | |
| Short memo regarding the hope that the cost of fitting louvres can be reduced. | 1st Jun 1927 | Box 66 \ 3 scan0172 | |
| Cost, appearance, and simplification of 40/50 bonnet shutters. | 23th Jun 1927 | Box 66 \ 3 scan0173 | |
| Possibility of removing bonnet shutters from Phantom models to reduce costs and proposing practical tests. | 27th Jun 1927 | Box 66 \ 3 scan0174 | |
| Use of bonnet shutters versus louvres, focusing on noise, cooling, and cost. | 1st Jun 1927 | Box 66 \ 3 scan0175 | |
| | | | |
