| Description | Date | Identifier | |
| Letter from The Steam Fittings Co., Ltd. offering thermostatic devices for motor-cars. | 9th Aug 1921 | Box 66a \ 4 scan0062 | |
| Introductory page for a catalogue on automatic temperature control systems. | 1st Jun 1921 | Box 66a \ 4 scan0063 | |
| Product data sheet for 'SAMSON' Automatic Temperature Regulators for rooms and liquids. | 1st Jun 1921 | Box 66a \ 4 scan0064 | |
| Brochure for 'SAMSON' Automatic Temperature Regulators for controlling room and liquid temperatures. | 1st Jun 1921 | Box 66a \ 4 scan0065 | |
| Brochure for 'SAMSON' Automatic Temperature Regulators from The Steam Fittings Co. Ltd. | 1st Jun 1921 | Box 66a \ 4 scan0066 | |
| Price list and specification sheet for 'SAMSON' automatic temperature regulators for rooms. | 1st Jun 1921 | Box 66a \ 4 scan0067 | |
| Product sheet for 'SAMSON' automatic temperature regulators for rooms. | 1st Jun 1921 | Box 66a \ 4 scan0068 | |
| Price list and specification sheet for 'Samson' Automatic Temperature Regulators. | 1st Jun 1921 | Box 66a \ 4 scan0069 | |
| Specification sheet for 'SAMSON' Automatic Temperature Regulators detailing their standard dimensions. | 17th May 1927 | Box 66a \ 4 scan0070 | |
| Inquiry about a suitable automatic temperature regulator for an exhaust-heated induction pipe jacket. | 24th Aug 1921 | Box 66a \ 4 scan0071 | |
| Standardisation of knobs on control levers, changing the material from ebonite to bakelite. | 3rd Oct 1923 | Box 66a \ 4 scan0072 | |
| Secret memorandum detailing alterations to engine controls for the addition of a throttle governor. | 30th Jun 1924 | Box 66a \ 4 scan0073 | |
| Alterations for adding a throttle governor carburetor to an engine, referencing drawing No.LeC.1388. | 1st Jul 1924 | Box 66a \ 4 scan0074 | |
| Extract discussing issues with the 40/50 carburettor control and proposing the Goshawk type as a replacement. | 14th Jul 1924 | Box 66a \ 4 scan0075 | |
| Modification to the front axle control, specifically raising the cross steering tube. | 24th Jul 1924 | Box 66a \ 4 scan0076 | |
| Relocating the carburetter control to the steering column and the design of a new double-acting radiator shutter control. | 8th Aug 1924 | Box 66a \ 4 scan0077 | |
| Secret memo discussing the arrangement of radius rods and front springs for a parallel control system. | 12th Aug 1924 | Box 66a \ 4 scan0078 | |
| Dashboard sketch, bonnet and dash arrangements, and control fittings for a model chassis. | 15th Sep 1924 | Box 66a \ 4 scan0079 | |
| Secret memo detailing the revised dashboard layout (Scheme 1847), including the relocation of controls and required modifications. | 17th Sep 1924 | Box 66a \ 4 scan0080 | |
| Secret memo discussing two design schemes for a carburetter mixture control system, comparing a solid shaft with a tube design. | 3rd Oct 1924 | Box 66a \ 4 scan0081 | |
| Slow running of the EAC.11 engine and proposing carburettor control modifications. | 6th Oct 1924 | Box 66a \ 4 scan0082 | |
| Secret memorandum detailing modifications to the throttle control gear. | 11th Nov 1924 | Box 66a \ 4 scan0083 | |
| The development of an inverted mechanism for 'B' steering, part of the 'Series 'V' Controls' project. | 1st Jan 1925 | Box 66a \ 4 scan0084 | |
| Secret memo detailing modifications to the 'V' Series engine controls. | 14th Jan 1925 | Box 66a \ 4 scan0085 | |
| Secret memo detailing five proposed modifications for a thermometer and its related wiring. | 20th Mar 1925 | Box 66a \ 4 scan0086 | |
| 'V' series shutter control and instrument board positioning. | 23th Mar 1925 | Box 66a \ 4 scan0087 | |
| Order and application of experimental controls for shutters and starting carburettor. | 1st Apr 1925 | Box 66a \ 4 scan0088 | |
| Secret memo regarding a complaint about accelerator control wear and a proposed modification to increase clearance and effective stroke. | 4th Mar 1925 | Box 66a \ 4 scan0089 | |
| Secret internal memo detailing modifications and addressing issues with 'V' Series controls. | 18th Apr 1925 | Box 66a \ 4 scan0090 | |
| Critiquing the design of radiator, shutter, and other control mechanisms. | 19th Apr 1925 | Box 66a \ 4 scan0091 | |
| Method of fixing control pins, proposing a press fit to prevent them from working loose. | 20th Apr 1925 | Box 66a \ 4 scan0092 | |
| Accelerator control movements and suggesting modifications to a lever for the 'EAC' and 40/50 HP models. | 22th Apr 1925 | Box 66a \ 4 scan0093 | |
| Diagram and calculations for the E.A.C. accelerator pedal movement. | 21th Apr 1925 | Box 66a \ 4 scan0095 | |
| Issues with fitting control pins, comparing press fit, solid riveting, and a preferred taper fit. | 5th May 1925 | Box 66a \ 4 scan0096 | |
| Overlooked drawing for 'X' Series shutter and starting carburetter control modifications. | 6th Jul 1925 | Box 66a \ 4 scan0097 | |
| Modifications to the 'X' series radiator shutter control and dashboard layout. | 14th Jul 1925 | Box 66a \ 4 scan0098 | |
| Clarifying misunderstandings about the 'W' series radiator and bonnet design. | 15th Jul 1925 | Box 66a \ 4 scan0099 | |
| Design proposals for a 'W' Series radiator, including shutters and dimensions. | 16th Jul 1925 | Box 66a \ 4 scan0100 | |
| Design of radiators, shutters, and louvres for 'V' series and experimental models. | 7th Jul 1925 | Box 66a \ 4 scan0101 | |
| Issues with loose control ball joints and proposing modifications to drawings and tolerances. | 8th Aug 1925 | Box 66a \ 4 scan0102 | |
| Arrangements for altering the 'New Phantom' radiator shutter and carburetter mixture controls. | 9th Oct 1925 | Box 66a \ 4 scan0103 | |
| Highlighting potential damage to the New Phantom's carburettor mixture control lever from the bonnet. | 7th Oct 1925 | Box 66a \ 4 scan0104 | |
| Sensitivity of the 'New Phantom' radiator shutter control and proposing a modification. | 7th Oct 1925 | Box 66a \ 4 scan0105 | |
| Issues with bonnet closure and potential alterations to the shutter control lever on the New Phantom. | 9th Oct 1925 | Box 66a \ 4 scan0106 | |
| Carburetter control modifications for the 'New Phantom'. | 20th Oct 1925 | Box 66a \ 4 scan0107 | |
| Standardisation proposal for the low speed jet control cone on the Phantom. | 14th Oct 1925 | Box 66a \ 4 scan0108 | |
| Complaint about rattling controls on the New Phantom steering column and proposed anti-rattle solutions. | 23th Jan 1926 | Box 66a \ 4 scan0109 | |
| Four potential solutions with diagrams to stop rattles in the Phantom controls. | 2nd Apr 1926 | Box 66a \ 4 scan0110 | |
| Design of engine auxiliary controls, specifically for magneto and steering columns 'B' and 'C'. | 15th Feb 1926 | Box 66a \ 4 scan0111 | |
| Tests determining the efficiency of ignition controls and the associated oil relay. | 16th Feb 1926 | Box 66a \ 4 scan0112 | |
| Initial tests to determine the efficiency of a different type of piston compared to the standard cup leather. | 16th Feb 1926 | Box 66a \ 4 scan0113 | |
| Test report comparing the load-lifting performance of five different piston types under specific operating conditions. | 16th Feb 1926 | Box 66a \ 4 scan0114 | |
| The efficiency of an oil relay, detailing tests on expanding rings, power controls, and magneto friction. | 16th Feb 1926 | Box 66a \ 4 scan0115 | |
| Explanation of the forces and mechanics for the hand control of the magneto, relay, and pressure piston. | 16th Feb 1926 | Box 66a \ 4 scan0116 | |
| Investigation into the characteristics of an ignition governor and oil relay. | 16th Feb 1926 | Box 66a \ 4 scan0117 | |
| Technical note with a diagram explaining the relationship between effective pressure, load, and gaps in a piston system. | 16th Feb 1926 | Box 66a \ 4 scan0118 | |
| Page discussing the variation of oil pressure with speed and its effect on load. | 27th Feb 1926 | Box 66a \ 4 scan0119 | |
| Delays in testing and development of the back axle control for the Phantom model. | 27th Feb 1926 | Box 66a \ 4 scan0120 | |
| Relaying Mr. Royce's remarks on the case-hardening of control forks and pins. | 9th Jun 1926 | Box 66a \ 4 scan0121 | |
| Standardisation of chassis parts relating to roller bearings for the carburetter throttle. | 18th Nov 1926 | Box 66a \ 4 scan0122 | |
| Standardisation of chassis parts by modifying the butterfly throttle angle and controls to clear the bonnet. | 20th Nov 1926 | Box 66a \ 4 scan0123 | |
| Modifications to the Phantom front axle control system to replace the spring control with a shock damper. | 14th Dec 1926 | Box 66a \ 4 scan0124 | |
| Experiments and modifications for the Phantom front axle control lever and damper. | 23th Dec 1926 | Box 66a \ 4 scan0125 | |
| Removal of a second spring from the exhaust cutout mechanism following a new single-spring design. | 12th Jan 1927 | Box 66a \ 4 scan0126 | |
| Proposing an experimental spring-controlled ball joint for a torque arm. | 17th Jan 1927 | Box 66a \ 4 scan0127 | |
| Standardisation of a single arm throttle governor control lever with a larger diameter roller. | 15th Dec 1926 | Box 66a \ 4 scan0128 | |
| Control for the exhaust cutout, suggesting the removal of a rod during coachbuilding to prevent damage. | 28th Jan 1927 | Box 66a \ 4 scan0129 | |
| Agreeing to a suggestion regarding the control for an exhaust cutout. | 10th Feb 1927 | Box 66a \ 4 scan0130 | |
| Layout of an axle control damper, detailing steering lock angles and tyre specifications. | 14th Feb 1927 | Box 66a \ 4 scan0131 | |
| Standardisation of exhaust cutout and controls to prevent rattling and simplify the system. | 23th Dec 1926 | Box 66a \ 4 scan0132 | |
| Standardisation of chassis parts, detailing the fitting of a new part and associated costs. | 14th May 1927 | Box 66a \ 4 scan0133 | |
| Steering difficulties on the Springfield Chassis, particularly related to low-pressure tires and steering gear modifications. | 1st Aug 1927 | Box 66a \ 4 scan0134 | |
| Brake mechanism noises and exhaust banging issues, with recommendations for driving technique. | 1st Aug 1927 | Box 66a \ 4 scan0135 | |
| Page concluding a discussion on the benefits of a high-speed governor and roller bearing throttle. | 11th May 1927 | Box 66a \ 4 scan0136 | |
| Standardisation of chassis parts for modified controls for shutters and starter carburetter. | 11th May 1927 | Box 66a \ 4 scan0137 | |
| Standardisation form for a new chassis part, detailing the test date, associated costs, and the first chassis for fitting. | 1st Apr 1928 | Box 66a \ 4 scan0138 | |
| Fitting of controls and instruments on Barkers Continental Phantom experimental models. | 2nd Feb 1928 | Box 66a \ 4 scan0139 | |
| Instructions regarding the positioning of controls and modifications for Barkers Continental Phantom models. | 4th Feb 1928 | Box 66a \ 4 scan0140 | |
| Secret memo regarding the design, blueprints, and body style of a Sports Touring Car. | 25th Jul 1924 | Box 66a \ 4 scan0141 | |
| The progress of a new radiator drawing, including details on the matrix, tubes, and shutter controls. | 25th Jul 1924 | Box 66a \ 4 scan0142 | |
| Secret memo discussing body proposals for the EAC.2 model and radiator design considerations. | 25th Jul 1924 | Box 66a \ 4 scan0143 | |
| Secret memo regarding a mock-up of the bonnet, radiator, and dash for the E.A.C.II model. | 7th Aug 1924 | Box 66a \ 4 scan0144 | |
| Proposed dimensions for the bonnet, radiator, and dash of the EAC.2 model, requesting a mock-up. | 8th Jul 1924 | Box 66a \ 4 scan0145 | |
| Replacing the carburetter control on the steering column and a new radiator shutter control. | 8th Aug 1924 | Box 66a \ 4 scan0146 | |
| Secret internal memo discussing the specifications for a new car chassis with four-wheel brakes for sales approval. | 14th Aug 1924 | Box 66a \ 4 scan0147 | |
| Bringing car EAC.11 for inspection after modifications and progress on the new EAC.111 chassis. | 19th Aug 1924 | Box 66a \ 4 scan0148 | |
| Secret memo regarding the design and mock-up of a new radiator, bonnet, and dash. | 19th Aug 1924 | Box 66a \ 4 scan0149 | |
| Mock-up bonnet and radiator ready for sending. | 1st Aug 1924 | Box 66a \ 4 scan0150 | |
| Increase in the height of the EAC.2 radiator matrix by altering its position in the frame. | 1st Aug 1924 | Box 66a \ 4 scan0151 | |
| Secret memo discussing the issue of water boiling in an engine and potential solutions. | 2nd Sep 1924 | Box 66a \ 4 scan0152 | |
| Secret memorandum detailing modifications to the front cross member and radiator suspension. | 1st Sep 1924 | Box 66a \ 4 scan0153 | |
| Secret memo regarding drawings and controls for the radiator and radiator shutters. | 4th Sep 1924 | Box 66a \ 4 scan0154 | |
| The delivery schedule for a dummy chassis required for EAC.11 bodies. | 22th Sep 1924 | Box 66a \ 4 scan0155 | |
| Secret memo discussing arrangements for fitting a body to a chassis, suggesting using a complete chassis over a dummy to avoid suspicion. | 13th Oct 1924 | Box 66a \ 4 scan0156 | |
| Secret memo confirming arrangements for building the first three Sports Model bodies at Barkers. | 13th Oct 1924 | Box 66a \ 4 scan0157 | |
| Design and specifications of a radiator specimen. | 23th Oct 1924 | Box 66a \ 4 scan0158 | |
| Secret memorandum regarding the placement of the front number plate to improve airflow and aesthetics. | 23th Oct 1924 | Box 66a \ 4 scan0159 | |
| Secret memo from CJ to Hs regarding a suggestion for the EAC.II radiator and a request for a mock-up. | 28th Oct 1924 | Box 66a \ 4 scan0160 | |
| Secret memorandum discussing the aesthetic impact of vertical versus horizontal radiator shutters on the E.A.C. II model. | 27th Oct 1924 | Box 66a \ 4 scan0161 | |
| Secret memo regarding the design of the integral vertical radiator shutters for the EAC.11 car. | 29th Oct 1924 | Box 66a \ 4 scan0162 | |
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