| Description | Date | Identifier | |
| Modifications to a steam engine indicator for measuring hydraulic shock absorber pressures and discussing test results. | 8th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan025 | |
| Summary of test results on pressure velocity dampers, outlining findings and proposing modifications. | 8th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan026 | |
| Report page discussing low-speed valve loading, shock absorber efficiency, and axle movement analysis. | 8th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan027 | |
| Comparison table of characteristics for Viscosity Loading and Standard rear hydraulic shock dampers. | 18th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan028 | |
| Blueprint detailing alterations to a pressure velocity damper for low and high-pressure systems. | 18th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan029 | |
| Performance graphs for a rear damper system at various stroke lengths and pressures. | 18th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan030 | |
| Graph comparing mean effective and maximum pressures for standard dampers and velocity pressure dampers at varying strokes. | 18th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan031 | |
| Performance graphs for a Standard 40/50 rear hydraulic shock absorber at various strokes and pressures. | 18th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan032 | |
| Inspection of a mushroom type ignition rotor after a 10,000-mile bench test. | 19th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan033 | |
| The 20,000-mile bench endurance test of a Bosch Type FU6R Magneto, number 31859. | 22th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan034 | |
| Endurance test report for an R. Bosch type FU6R magneto, detailing a misfiring issue. | 21th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan035 | |
| Magneto performance, detailing low-speed sparking tests and electrical noise observations. | 21th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan036 | |
| Inspection report on distributor points and armature windings, with a proposal to unwind the armature. | 25th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan037 | |
| The noise levels of Watford EW.6 magnetos and the switch to a quieter continuous cam ring type. | 25th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan038 | |
| Tests to determine the effect of temperature rise on the behaviour of hydraulic shock absorbers. | 1st Jun 1928 | West Wittering \ S \ June1928-August1928 Scan039 | |
| Tests conducted on a hydraulic damper, detailing the performance of staggered orifices and issues with oil frothing. | 1st Jun 1928 | West Wittering \ S \ June1928-August1928 Scan040 | |
| Report summarising the results of a third series of tests carried out on a standard damper with altered pressure passages. | 1st Jun 1928 | West Wittering \ S \ June1928-August1928 Scan041 | |
| Graphs showing the performance variation of a standard damper with temperature under high and low pressure. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan042 | |
| Print Room stamp on the reverse of a document. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan043 | |
| Series of graphs showing performance variations with oil temperature and reduced diameter restrictions. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan044 | |
| The reverse of a document showing a Print Room stamp from Derby. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan045 | |
| Study of pressure variations caused by temperature changes in a system with staggered orifices. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan046 | |
| Blank document page with a Print Room stamp. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan047 | |
| The testing and performance of cadmium-plated road springs. | 26th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan048 | |
| The centralised lubrication system, detailing a successful test and a remaining issue with the Bijur drip plug filter. | 26th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan049 | |
| The construction and performance of a Grav-vac vacuum petrol feed tank, comparing it to the Autovac system. | 26th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan050 | |
| Comparison of petrol delivery performance and failings between the Grav-vac and Autovac fuel systems. | 22th Oct 1924 | West Wittering \ S \ June1928-August1928 Scan051 | |
| Graph comparing petrol delivery at full throttle for Autovac and Gravvac systems on a 40/50HP engine. | 22th Oct 1924 | West Wittering \ S \ June1928-August1928 Scan052 | |
| Blank page with a red date stamp from the Issue Room in Derby. | 23th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan053 | |
| Graph comparing petrol delivery for Autovac and Grav-Vac fuel systems against induction pipe depression on a 40/50 engine. | 22th Jun 1927 | West Wittering \ S \ June1928-August1928 Scan054 | |
| Blueprint diagram showing a cutaway view of a Grav-Vac Fuel Tank. | 22th Jun 1923 | West Wittering \ S \ June1928-August1928 Scan055 | |
| Blank document page with a red 'Patent Room, Filed' stamp from Derby. | 23th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan056 | |
| Comparative test report on the steering performance and handling of a 6.5-litre Bentley fitted with balloon tyres. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan057 | |
| Analysis comparing a Bentley's steering system to a Rolls Royce's, focusing on issues like wobbles and column flexing. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan058 | |
| Performance assessment of a car's major components, including the brakes, engine, clutch, gearbox, and suspension. | 28th Jun 1928 | West Wittering \ S \ June1928-August1928 Scan059 | |
| Conclusion to a report criticizing Bentley speedometer accuracy and chassis quality in comparison to a Chrysler. | 1st Jul 1928 | West Wittering \ S \ June1928-August1928 Scan060 | |
| High-speed wobble issues and solutions for 40/50 HP steerings. | 1st Jul 1928 | West Wittering \ S \ June1928-August1928 Scan061 | |
| Report discussing frame stiffness, suspension damping, and vehicle handling characteristics at different speeds. | 1st Jul 1928 | West Wittering \ S \ June1928-August1928 Scan062 | |
| Further tests on steering stability, tyre balance, frame stiffness, and engine mounting. | 1st Jul 1928 | West Wittering \ S \ June1928-August1928 Scan063 | |
| Graph comparing the torsional stiffness of different frame configurations under load. | 5th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan064 | |
| Blank page with a Print Room stamp from Derby. | 5th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan065 | |
| Blueprint detailing an X-shaped cross-member fitted to model 10-EX. | 4th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan066 | |
| Page with a Print Room stamp. | 4th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan067 | |
| The 'Green Light Scheme', querying the placement of the field fuse in a new mould. | 19th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan068 | |
| Test results on hydraulic dampers, focusing on pressure buildup from oil expansion. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan069 | |
| Analysis of the pressure dynamics within an oil-filled damper system during high and low-pressure strokes. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan070 | |
| Analysis of damper performance, focusing on the effects of oil temperature, vent size, and pressure phenomena. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan071 | |
| Continuation of a report on damper and shock absorber testing, noting observations on air vents, pressure, and arm twist. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan072 | |
| Series of graphs showing temperature effects and air vent modifications on a damper's pressure. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan073 | |
| Reverse of a document showing a 'Print Room' stamp from Derby. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan074 | |
| Graphs comparing the high and low pressure sides of a standard damper under specific test conditions. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan075 | |
| Stamp from the Print Room in Derby on the reverse of a document. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan076 | |
| Indicator diagrams for a standard damper at various strokes and pressures. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan077 | |
| The reverse side of a document showing a red ink stamp from the Print Room. | 9th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan078 | |
| 20 HP dynamo with coarser gauge armature for higher output. | 11th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan079 | |
| The temperature and performance testing of a dynamo's commutator and armatures. | 16th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan080 | |
| Attaching a blueprint showing the output curve for a 20 HP Dynamo with a coarser gauge armature. | 16th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan081 | |
| Graph of dynamo output curves for a 20 HP model, comparing specified requirements against standard and high output armatures. | 1st Jul 1928 | West Wittering \ S \ June1928-August1928 Scan082 | |
| Almost completely illegible document bearing a Print Room date stamp. | 16th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan083 | |
| New 20 HP chassis, its modifications, and a potential delay in completing the bodywork. | 17th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan084 | |
| The testing of a centralised lubrication scheme and a cadmium plated road spring. | 17th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan085 | |
| Indicator diagrams and tests conducted on American shock absorbers. | 18th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan086 | |
| Typed memo discussing suspension firmness, comparing American riding conditions and proposing a new method. | 18th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan087 | |
| Comparison of standard and American rear shock absorbers using high-pressure diagrams. | 18th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan088 | |
| Blank page with a red 'Print Room' stamp from Derby. | 18th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan089 | |
| Performance diagrams for a standard damper at various strokes and running speeds. | 18th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan090 | |
| The reverse side of a document showing a Print Room receipt stamp. | 18th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan091 | |
| Clarifying a misunderstanding regarding the wiring of a green indicator lamp and its charging switch. | 18th Jul 1926 | West Wittering \ S \ June1928-August1928 Scan092 | |
| Failed 20 HP piston and proposed changes to piston rings. | 19th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan093 | |
| Difficulties experienced with new type crankshaft dampers on 20 HP and 40/50 HP models. | 19th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan094 | |
| Issues with driving springs, damping, friction discs, and potential timing errors on a 20 HP model. | 19th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan095 | |
| Power unit speeds, slipper wheel drives, harmonics, and the future requirement for a reduced inertia type damper. | 24th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan096 | |
| Corrections to a Phantom model wiring diagram, specifically regarding the instrument board and green lamp. | 24th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan097 | |
| The electrical configuration of a green lamp and shunt coils to prevent circuit failure. | 1st Jul 1928 | West Wittering \ S \ June1928-August1928 Scan098 | |
| Springing specifications for the Phantom car, discussing buffer clearances and adjustments for different conditions. | 1st Jul 1928 | West Wittering \ S \ June1928-August1928 Scan099 | |
| Continued memo discussing complaints about springing and numerous spring breakages on Phantom, 40/50 HP, and early 20 HP cars. | 23th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan100 | |
| Springing issues and experiences with the 20 HP car, comparing front and rear springs. | 23th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan101 | |
| Technical discussion on suspension spring flexibility and ride comfort issues for the 20 HP and Phantom 40/50 HP models. | 25th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan102 | |
| Fitting and testing of pistons and rings for 20 HP and Phantom models. | 25th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan103 | |
| Fitting and performance of a 20 HP dynamo with a higher output armature. | 25th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan104 | |
| Clarifying the electrical wiring for the cutout, green lamp switch coil, and green lamp. | 26th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan105 | |
| The failure of a dynamo positive fuse and its effect on the charging and lamp systems. | 24th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan106 | |
| Field fuse failures in a 20 HP car, attributing the issue to cumulative oxidation of the fuse wire. | 24th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan107 | |
| Simplifying the wiring for the green lamp switch unit and Klaxon horn. | 24th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan108 | |
| Proposals for an electrical arrangement, specifically a method of controlling battery overcharging using the headlamp switch. | 13th Aug 1928 | West Wittering \ S \ June1928-August1928 Scan109 | |
| Improving Phantom steering by increasing the wheel off-set to reduce high-speed wobbles. | 13th Aug 1928 | West Wittering \ S \ June1928-August1928 Scan110 | |
| Preliminary tests of front wheels with increased offset to eliminate steering tramping and wobble. | 23th Jul 1928 | West Wittering \ S \ June1928-August1928 Scan111 | |
| Make-ratio speed curve for a new battery ignition contact breaker, comparing it to older and competitor models. | 14th Aug 1928 | West Wittering \ S \ June1928-August1928 Scan112 | |
| Graph showing the Make Ratio-Speed curve for a new standard battery ignition contact breaker. | 27th Jul 1937 | West Wittering \ S \ June1928-August1928 Scan113 | |
| Blank document page with a 'Print Room' reception stamp. | 13th Aug 1928 | West Wittering \ S \ June1928-August1928 Scan114 | |
| Use of non-inductive resistance as the best protection for actuator box contacts. | 5th Aug 1928 | West Wittering \ S \ June1928-August1928 Scan115 | |
| Investigating the cause of a high-speed steering wobble. | 21th Aug 1928 | West Wittering \ S \ June1928-August1928 Scan116 | |
| The effects of different rim sizes and tyre pressures on high-speed wobbles and riding comfort. | 22th Aug 1926 | West Wittering \ S \ June1928-August1928 Scan117 | |
| Comparison and analysis of a Bosch FU6R magneto against a Watford EW6 magneto. | 22th Aug 1926 | West Wittering \ S \ June1928-August1928 Scan118 | |
| Comparison of Bosch and Watford armatures, detailing windings, resistances, and magnet pole pieces. | 22th Aug 1926 | West Wittering \ S \ June1928-August1928 Scan119 | |
| Comparison between Watford EW6 and Bosch magneto pole pieces, including a sketch. | 20th Aug 1928 | West Wittering \ S \ June1928-August1928 Scan120 | |
| Comparison of the electrical properties between R. Bosch FU6R and Watford EW6 magneto armatures. | 20th Aug 1928 | West Wittering \ S \ June1928-August1928 Scan121 | |
| Comparison of electrical characteristics between Watford EW6 and R.Bosch FU6R armatures. | 8th Dec 1924 | West Wittering \ S \ June1928-August1928 Scan122 | |
| Comparison of Bosch and Watford core sections, discussing winding efficiency improvements. | 8th Dec 1924 | West Wittering \ S \ June1928-August1928 Scan123 | |
| Instructions with diagrams comparing Bosch and Watford core sections and analyzing armature windings. | 8th Dec 1924 | West Wittering \ S \ June1928-August1928 Scan124 | |
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