| Description | Date | Identifier | |
| Blueprint detailing a modification to a piston. | 27th Aug 1936 | Box 95 \ 4 scan0070 | |
| Blueprint for a modification to a valve block component. | 27th Aug 1936 | Box 95 \ 4 scan0071 | |
| Broken 2BA bolt on a Phantom III rear damper connecting link, a fault also seen on the Phantom II. | 26th Nov 1936 | Box 95 \ 4 scan0072 | |
| Investigation of a knock from the rear shock absorbers on chassis 3.AZ-112, suggesting an upgrade to the bolt size. | 3rd Dec 1936 | Box 95 \ 4 scan0073 | |
| Letter from Arens Controls Limited confirming the dispatch of two control units. | 7th Dec 1936 | Box 95 \ 4 scan0074 | |
| The stiffness and seizure of Arens controls for shock dampers, recommending a switch to a rod control system. | 8th Dec 1936 | Box 95 \ 4 scan0075 | |
| Instructions for fitting new bolts on Phantom III Chassis No.3.AZ.112, with a temporary solution. | 9th Dec 1936 | Box 95 \ 4 scan0076 | |
| Fitting rubber connecting links and testing synthetic rubber 'gaco' on the rear shock dampers and roll rod for car 35-EX. | 29th Dec 1936 | Box 95 \ 4 scan0077 | |
| Covering order for two Arens Controls. | 1st Jan 1937 | Box 95 \ 4 scan0078 | |
| Shock absorber governor pressure readings taken from car 37-EX, with suggested check values. | 19th Jan 1937 | Box 95 \ 4 scan0079 | |
| Clarifying the identification of an experimental Phantom III car in relation to its shock damper bearings. | 11th Feb 1937 | Box 95 \ 4 scan0080 | |
| Sheared lever on the rear dampers and roll rod of the 35-EX model, and the proposed solution. | 15th Feb 1937 | Box 95 \ 4 scan0081 | |
| Reducing the bore in the Phantom III rear damper and rear roll rod connecting tubes to reduce costs. | 17th Feb 1937 | Box 95 \ 4 scan0082 | |
| The failure of rubber blocks which are not lasting more than 250 miles due to design flaws. | 23th Feb 1937 | Box 95 \ 4 scan0083 | |
| Performance of Phantom III hydraulic dampers and proposing a test for a new valve design. | 24th Feb 1937 | Box 95 \ 4 scan0084 | |
| The cause of rattling troubles in rear dampers after 10,000 miles. | 5th Mar 1937 | Box 95 \ 4 scan0085 | |
| Knocking issue and bearing clearances on Phantom III rear dampers. | 13th Mar 1937 | Box 95 \ 4 scan0086 | |
| Control for a shock damper governor unit and the fitting of replacement parts. | 25th Mar 1937 | Box 95 \ 4 scan0087 | |
| Phantom III rear shock dampers, their design history, and potential future modifications. | 13th Mar 1937 | Box 95 \ 4 scan0088 | |
| Modification to the Rear Axle Spring Plate after a design failure on a car that crossed Africa. | 14th Apr 1937 | Box 95 \ 4 scan0089 | |
| Oil leakage from front suspension dampers and a request for a redesigned breather system. | 29th Apr 1937 | Box 95 \ 4 scan0090 | |
| Table of minimum and maximum shock damper governor control pressures at different speeds. | 18th Apr 1937 | Box 95 \ 4 scan0091 | |
| Implementation of a new ride control system for the Phantom III, addressing issues with existing drilled parts. | 3rd May 1937 | Box 95 \ 4 scan0092 | |
| Request to produce three more sets of parts for Phantom III Front Dampers. | 10th May 1937 | Box 95 \ 4 scan0093 | |
| Request to fit new Armstrong dampers and make a mild steel roll rod for experimental car 33-EX. | 29th Jun 1937 | Box 95 \ 4 scan0094 | |
| Investigating customer complaints of shock damper knocks on car model 3-AZ-38. | 15th Jul 1937 | Box 95 \ 4 scan0095 | |
| Effects of shock damper poundage on the Phantom III (32-EX and 35-EX models). | 26th Jul 1937 | Box 95 \ 4 scan0096 | |
| Standardisation of parts for the Phantom III, replacing the 'Arens' shock absorber rod controls. | 14th Apr 1937 | Box 95 \ 4 scan0097 | |
| Cost and production analysis for the standardization of a shock absorber for control. | 15th Apr 1937 | Box 95 \ 4 scan0098 | |
| Modifications to the Spectre servo system, increasing its diameter and simplifying other components. | 18th May 1934 | Box 95 \ 4 scan0099 | |
| Proposing modifications to the servo drive for the Spectre and Wraith models. | 8th Nov 1934 | Box 95 \ 4 scan0100 | |
| Proposing modifications to the servo drive for the Spectre and Wraith models. | 8th Nov 1934 | Box 95 \ 4 scan0101 | |
| The revised specifications for the servo and speedometer drive for the Spectre model. | 9th Nov 1934 | Box 95 \ 4 scan0102 | |
| Design improvements for a semi-servo braking system, comparing different methods for securing fabric linings. | 3rd Dec 1934 | Box 95 \ 4 scan0103 | |
| Modifications to cam levers, shaft assembly, and gearbox support. | 3rd Dec 1934 | Box 95 \ 4 scan0104 | |
| Experiment to use a standard ball bearing for the Spectre Servo. | 19th Dec 1934 | Box 95 \ 4 scan0105 | |
| Methods for locating fabrics on servo discs, comparing keyways and riveting for the Spectre Servo. | 20th Dec 1934 | Box 95 \ 4 scan0106 | |
| Alterations to the Spectre Servo brake system layout. | 5th Jan 1935 | Box 95 \ 4 scan0107 | |
| Requesting a design change for the Spectre Servo to use bolts instead of rivets on the balance arm levers. | 19th Jan 1935 | Box 95 \ 4 scan0108 | |
| The failure of rivets in the balancing arm of the Spectre Servo brake mechanism. | 21th Jan 1935 | Box 95 \ 4 scan0109 | |
| Different schemes for Spectre servo linings and their attachment methods. | 29th Jan 1935 | Box 95 \ 4 scan0110 | |
| Secret memo requesting to lengthen the reverse pull rod slot for the Servo on Spectre and Wraith models. | 13th Mar 1935 | Box 95 \ 4 scan0111 | |
| Technical memo about a friction device for the Spectre Servo's balance arm. | 2nd Apr 1938 | Box 95 \ 4 scan0112 | |
| Issues with the fitment and clearance of splined linings on servos for Spectre, Bentley & 25 HP models. | 8th Jul 1935 | Box 95 \ 4 scan0113 | |
| Three proposed schemes to resolve a fouling issue between the Spectre Servo stop plate and the lever pin. | 28th Aug 1935 | Box 95 \ 4 scan0114 | |
| Design change for the Phantom III servo system. | 16th Oct 1935 | Box 95 \ 4 scan0115 | |
| Complaint about servo cam levers on the Phantom III and a proposed solution using a bronze bush. | 19th Dec 1935 | Box 95 \ 4 scan0116 | |
| Indentation of Phantom III servo cams and requesting modified scissor levers for testing. | 14th Jan 1936 | Box 95 \ 4 scan0117 | |
| Investigation into indentation on the Phantom III Servo cams, identifying causes and proposing solutions. | 14th Jan 1936 | Box 95 \ 4 scan0118 | |
| Increasing the casehardening depth of cams and altering pedal stops to address cam indentation issues. | 14th Jan 1936 | Box 95 \ 4 scan0119 | |
| Modification to the brake pedal stop for the Phantom III servo system. | 15th Jan 1936 | Box 95 \ 4 scan0120 | |
| Request to fit a 32-EX Servo to a chassis before its 10,000-mile test. | 29th Jan 1936 | Box 95 \ 4 scan0121 | |
| Confirmation regarding a modification to the servo disc type damper nut and bolt for Phantom III, 20/25, and Bentley models. | 29th Jan 1936 | Box 95 \ 4 scan0122 | |
| Confirmation memo regarding the servo disc-type damper, detailing the use of a full-depth lock nut and a lengthened bolt for the Phantom III, 20/25, and Bentley models. | 29th Jan 1936 | Box 95 \ 4 scan0123 | |
| Confirmation of a modification to the servo disc type damper for the Phantom III, 20/25 and Bentley models. | 29th Jan 1936 | Box 95 \ 4 scan0124 | |
| Design of a servo countershaft for the Phantom TIV, using oilite and floating bushes. | 12th Feb 1936 | Box 95 \ 4 scan0125 | |
| Design note for the Servo Countershaft on the Phantom III model. | 12th Feb 1936 | Box 95 \ 4 scan0126 | |
| Production quotations and experimental work on solid forged and rolled eye road springs for the Phantom III. | 21th Apr 1936 | Box 95 \ 4 scan0127 | |
| Technical memorandum detailing modifications and specifications for the vacuum servo on a Phantom III clutch. | 21th May 1936 | Box 95 \ 4 scan0128 | |
| Modifications to clutch servo assistance and linkages for the 20/25 and Phantom III models. | 25th May 1936 | Box 95 \ 4 scan0129 | |
| Request to manufacture a pair of 42° servo cams for a Phantom III, car 32-EX. | 25th May 1936 | Box 95 \ 4 scan0130 | |
| Questioning the overly rated damping loading spring in the Phantom III servo scheme. | 1st Jul 1936 | Box 95 \ 4 scan0131 | |
| Broken servo on Earl Beatty's Phantom III vehicle, prompting a special investigation. | 9th Oct 1936 | Box 95 \ 4 scan0132 | |
| Flawed and broken balance arm in the Phantom III servo, suspected to be caused by a forging defect. | 9th Oct 1936 | Box 95 \ 4 scan0133 | |
| Broken servo lever on a Phantom III, detailing the investigation and proposed replacement. | 9th Oct 1936 | Box 95 \ 4 scan0134 | |
| Broken Phantom III servo lever, revealing cracks in other stock parts and questioning the inspection system. | 13th Oct 1936 | Box 95 \ 4 scan0135 | |
| Micro-examination report on a failed Ph.III mild steel servo brake lever, finding the cause to be pre-existing cracks from faulty forging. | 14th Oct 1936 | Box 95 \ 4 scan0136 | |
| Broken servo lever for the Phantom III, comparing its manufacturing process and strength to the 25/30 and Bentley models. | 14th Oct 1936 | Box 95 \ 4 scan0137 | |
| Analysis of a Phantom III Servo T Lever failure and subsequent strength testing. | 22th Oct 1936 | Box 95 \ 4 scan0138 | |
| Modified front suspension shock damper for the Phantom III to eliminate knocking sounds. | 10th Nov 1936 | Box 95 \ 4 scan0139 | |
| The strengthening of the Phantom III servo main lever. | 17th Nov 1936 | Box 95 \ 4 scan0140 | |
| Reverting to the Phantom II practice for Phantom III shock absorber connections. | 4th Dec 1936 | Box 95 \ 4 scan0141 | |
| Standardization of a servo motor outboard bearing housing across Phantom III, 25/30, and Bentley models. | 30th Jan 1937 | Box 95 \ 4 scan0142 | |
| Instruction regarding the use of part G.82763 on the servo motors for all three production chassis. | 1st Feb 1937 | Box 95 \ 4 scan0143 | |
| Test procedure to resolve servo judder issues on the 35-EX Phantom III. | 2nd Mar 1937 | Box 95 \ 4 scan0144 | |
| Servo inefficiency on the Phantom III and starter motor jamming on the 25/30, due to failing cadmium plating. | 2nd Jun 1937 | Box 95 \ 4 scan0145 | |
| Investigation and resolution of servo judders on a Phantom III. | 29th Apr 1937 | Box 95 \ 4 scan0146 | |
| Brake servo noise on release for the 32-EX Phantom III, suggesting an additional rubber stop. | 8th Jul 1937 | Box 95 \ 4 scan0147 | |
| The fitting of a weaker, untried spring to the Servo Motor Mechanism on PH.III chassis. | 13th Aug 1937 | Box 95 \ 4 scan0148 | |
| Modification concerning the rubber stop on the PH.III servo to save costs. | 17th Aug 1937 | Box 95 \ 4 scan0149 | |
| Cost-saving modification to the die for the servo disc G.85500, used for rubber stops on the Phantom III servo. | 18th Aug 1937 | Box 95 \ 4 scan0150 | |
| Letter to a supplier requesting a trial batch of six Phantom III servo motor linings. | 11th Sep 1937 | Box 95 \ 4 scan0151 | |
| The failure of a Gaco synthetic rubber buffer on the servo drag link for the Phantom III chassis 35-EX. | 5th Nov 1937 | Box 95 \ 4 scan0152 | |
| Photograph and description of a 'Gaco' synthetic rubber stop for a Phantom III servo. | 21th Sep 1937 | Box 95 \ 4 scan0153 | |
| Order for rubber servo stops for the Wraith and Phantom III models. | 8th Nov 1937 | Box 95 \ 4 scan0154 | |
| Technical note on servo efficiency, comparing the coefficient of friction (μ) for various models and its impact on brake proportions. | 2nd Mar 1938 | Box 95 \ 4 scan0155 | |
| Material selection for the worm wheel in the Servo Motor Mechanism P.D.138. | 6th Apr 1938 | Box 95 \ 4 scan0156 | |
| Order for one dozen Ferodo servo lining discs for testing and complaint cases. | 4th May 1938 | Box 95 \ 4 scan0157 | |
| To book out ten Phantom III Lucas Servo liners to Cricklewood. | 24th Oct 1938 | Box 95 \ 4 scan0158 | |
| The undocumented transfer of Phantom III Servo Liners. | 26th Oct 1938 | Box 95 \ 4 scan0159 | |
| Request to manufacture a Spectre Petrol Tap & Filter for test rig purposes. | 2nd Jul 1934 | Box 95 \ 4 scan0160 | |
| Proposing a modification to the Spectre petrol system to allow for dual ignition use. | 29th Sep 1934 | Box 95 \ 4 scan0161 | |
| Requesting a similar baffle scheme for the Spectre petrol tank as used on the Bentley. | 25th Jan 1935 | Box 95 \ 4 scan0162 | |
| Letter from S. Smith & Sons regarding a tank required for calibration purposes for drawing F.87026. | 29th Jan 1935 | Box 95 \ 4 scan0163 | |
| Request to despatch a Spectre Petrol Tank to Smith & Sons for calibration of a special Petrol Gauge Tank Attachment. | 30th Jan 1935 | Box 95 \ 4 scan0164 | |
| The reorientation of the petrol tank filler cap on the 3rd Spectre 32-Ex chassis. | 18th Feb 1935 | Box 95 \ 4 scan0165 | |
| Comparative analysis of petrol tank weights for Spectre, Bentley, and Cadillac models. | 25th Mar 1935 | Box 95 \ 4 scan0166 | |
| Instruction to fit a petrol gauge tank unit to a Spectre II vehicle. | 27th Mar 1935 | Box 95 \ 4 scan0167 | |
| Request for a Spectre Petrol Filter for test bed purposes. | 2nd Apr 1935 | Box 95 \ 4 scan0168 | |
| Secret memo discussing a new lubrication system for the steering pivots on the Spectre model. | 1st Jun 1935 | Box 95 \ 4 scan0169 | |
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