| Description | Date | Identifier | |
| Graph comparing the effect of drilled valves versus standard plain valves on rear axle movement. | 21th Apr 1931 | Morton \ M19 img158 | |
| The results of Phantom II radiator tests comparing different tube types. | 21th Apr 1931 | Morton \ M19 img159 | |
| Continuation of a report discussing achieving adequate efficiency without costly tube shapes. | 21th Apr 1931 | Morton \ M19 img160 | |
| Comparison table of different radiator tube types, detailing performance under various bonnet ventilation conditions. | 27th Mar 1930 | Morton \ M19 img161 | |
| Blueprint detailing the specifications, dimensions, and air pressure testing procedure for a matrix tube. | 27th Mar 1930 | Morton \ M19 img162 | |
| Tests on brake inefficiency for Phantom cars, comparing different brake drum and shoe configurations. | 5th May 1931 | Morton \ M19 img163 | |
| Brake tests, squeaking issues, and the merits of different brake drum and shoe combinations. | 5th Jun 1931 | Morton \ M19 img164 | |
| Modifications and experiments on a twin choke carburettor's slow running scheme. | 5th May 1931 | Morton \ M19 img165 | |
| Analysis of carburettor performance, focusing on idling mixture control and comparing different metering schemes. | 5th May 1931 | Morton \ M19 img166 | |
| Technical description of the Zenith carburetter's slow running, starting, and accelerator pump schemes. | 5th May 1931 | Morton \ M19 img167 | |
| Carburettor components including the accelerator pump, slow running unit, and Zenith float. | 15th May 1931 | Morton \ M19 img168 | |
| Blueprint showing a cross-section of a Phantom II Twin Choke Carburettor. | 15th May 1931 | Morton \ M19 img169 | |
| Blueprint detailing modifications for slow running on Phantom II twin choke carburettors. | 15th May 1931 | Morton \ M19 img170 | |
| Diagram illustrating the Zenith slow running carburetor scheme. | 14th May 1931 | Morton \ M19 img171 | |
| Application and testing of balance weights on 25 HP and Phantom 11 engines. | 16th May 1931 | Morton \ M19 img172 | |
| Crankshaft balance weights and critical speeds for the 25 HP and Phantom II models. | 16th May 1931 | Morton \ M19 img173 | |
| Table showing engine boiling temperatures in Celsius based on different types of bonnet ventilation at various speeds. | 16th May 1931 | Morton \ M19 img174 | |
| Comparison of boiling temperatures for various radiator matrix types at 30 and 45 MPH. | 20th May 1931 | Morton \ M19 img175 | |
| Proposal for a 10,000-mile test of a Phantom II in France to evaluate engine mountings, frame stiffness, and new pistons. | 20th May 1931 | Morton \ M19 img176 | |
| Continued list of modifications and proposals for components including the engine, crankshaft, petrol pump, radiator, brakes, and shock absorbers. | 20th May 1931 | Morton \ M19 img177 | |
| Proposed changes and tests for various car components including springs, dynamo, starter, ignition, and exhaust. | 20th May 1931 | Morton \ M19 img178 | |
| Potential improvements to the appearance of the lowered controls for the 27-EX car. | 20th May 1931 | Morton \ M19 img179 | |
| Rear axle ratios for the Phantom II and 25 HP models, including gear options and procurement. | 20th May 1931 | Morton \ M19 img180 | |
| Power output tests on a Continental Phantom II engine. | 23th May 1931 | Morton \ M19 img181 | |
| 10,000-mile test, focusing on engine mounting schemes and frame distortion for Phantom and 25 HP models. | 28th May 1931 | Morton \ M19 img182 | |
| Modification to cure rear foot brake groans on the Phantom II. | 29th May 1931 | Morton \ M19 img183 | |
| Frame distortion tests measuring the effect of various engine mountings on torsional frame stiffness and 'jellying'. | 29th May 1931 | Morton \ M19 img184 | |
| Tests investigating chassis 'jellying' on various car models by analysing damping and engine mounting configurations. | 29th May 1931 | Morton \ M19 img185 | |
| Results of engine power tests on a Phantom II engine and the required modifications needed for further improvements. | 30th May 1931 | Morton \ M19 img186 | |
| Experiments conducted on the Phantom II engine mounting to manage engine torque. | 2nd Jun 1931 | Morton \ M19 img187 | |
| Experiments and recommendations for increasing horsepower on the P.2 engine. | 3rd Jun 1931 | Morton \ M19 img188 | |
| Power increasing experiments through modifications to carburettors, camshafts, and compression ratios. | 1st Jun 1931 | Morton \ M19 img189 | |
| Analysis of engine power improvements achieved by using an Eagle IX carburetter. | 3rd Jun 1931 | Morton \ M19 img190 | |
| Tests at Brooklands to evaluate higher geared axle ratios on Continental Phantom II type cars. | 4th Jun 1931 | Morton \ M19 img191 | |
| Performance tests on car 26-EX, focusing on axle ratios, speed, and aerodynamics. | 4th Jun 1931 | Morton \ M19 img192 | |
| Summary concluding that the 12 x 41 axle would not be an improvement for the standard production Continental type car. | 4th Jun 1931 | Morton \ M19 img193 | |
| Required horsepower for the Phantom II model to achieve 100 M.P.H. and methods for calculating tractive resistance. | 8th Jun 1931 | Morton \ M19 img194 | |
| Unsuitability of a 6:1 compression ratio for a production Phantom II vehicle. | 1st Jun 1931 | Morton \ M19 img195 | |
| Camshaft experiments for the Phantom II engine, detailing results from varying valve timing, lift, and duration. | 12th Jun 1931 | Morton \ M19 img196 | |
| Effects of exhaust cam timing, valves, and carburettors on engine performance. | 12th Jun 1931 | Morton \ M19 img197 | |
| Engine performance metrics like BHP and comparing them to Bentley engines. | 13th Jun 1931 | Morton \ M19 img198 | |
| Power loss in the Phantom II engine exhaust system and silencer at high speeds. | 13th Jun 1931 | Morton \ M19 img199 | |
| Graph plotting the results of power tests on a PII unit, comparing performance with an open exhaust versus a standard silencer system. | 4th Jun 1931 | Morton \ M19 img200 | |
| Camshaft timing, valve specifications, and the results of various engine tests. | 17th Jun 1931 | Morton \ M19 img201 | |
| Modifications to valve timing, camshafts, and valve lift to improve engine performance. | 17th Jun 1931 | Morton \ M19 img202 | |
| Comparison of engine timing settings and resulting performance curves. | 17th Jun 1931 | Morton \ M19 img203 | |
| Performance graph comparing large versus small valves on a 4.9 CR engine with a 114° R camshaft. | 17th Jun 1931 | Morton \ M19 img204 | |
| Blueprint comparing four different desirable camshaft timing diagrams for the 40/50 model. | 18th Jun 1931 | Morton \ M19 img205 | |
| Tests conducted to ascertain and eliminate bonnet movement and knocks on un-made roads. | 18th Jun 1931 | Morton \ M19 img206 | |
| The high-speed performance test of a Phantom II car (27-EX) at Brooklands, which resulted in a broken crankshaft. | 13th Jul 1931 | Morton \ M19 img207 | |
| Diagrammatic study of bonnet movement measured in thousandths of an inch under a chassis twist test. | 19th Jun 1931 | Morton \ M19 img208 | |
| Page 2 of a report on vehicle troubles, including crankshaft, engine running, and petrol system issues. | 13th Jul 1931 | Morton \ M19 img209 | |
| Performance test results for car 27EX at Brooklands, showing an acceleration graph. | 13th Jul 1931 | Morton \ M19 img210 | |
| Clarifying that no modifications have been made to the Phantom II cylinder head combustion chamber. | 18th Jul 1931 | Morton \ M19 img211 | |
| 10,000-mile test of shock absorbers detailing faults and proposed solutions. | 24th Jul 1931 | Morton \ M19 img212 | |
| Performance tests of a new high-power camshaft for the Phantom II engine, including comparative timing diagrams. | 5th Aug 1931 | Morton \ M19 img213 | |
| Analysis of engine performance focusing on valve lift, timing, and camshaft design for efficiency and power gains. | 6th Aug 1931 | Morton \ M19 img214 | |
| Tabulated list comparing valve opening specifications for various engine models. | 8th Aug 1931 | Morton \ M19 img215 | |
| Camshaft comparisons for the P.2 engine, focusing on performance and silencing. | 8th Aug 1931 | Morton \ M19 img216 | |
| Knocking sound caused by reaction dampers and friction plates, with a proposed solution. | 1st Aug 1931 | Morton \ M19 img217 | |
| Development and testing of an air intake silencer for the Phantom II twin choke carburetter. | 2nd Aug 1931 | Morton \ M19 img218 | |
| Tests to diagnose the cause of persistent steering joggling in Phantom II cars. | 31th Aug 1931 | Morton \ M19 img219 | |
| Comparative road tests on a flexible shackle, front tyre pressures, and wider wheel track at 50 M.P.H. | 31th Aug 1931 | Morton \ M19 img220 | |
| The effects of damping, steering tube springs, front axle modifications, and tyre conditions on vehicle performance. | 31th Aug 1931 | Morton \ M19 img221 | |
| Continuation of a report on spring eye movement during braking and road tests. | 31th Aug 1931 | Morton \ M19 img222 | |
| Tests conducted to investigate the cause of persistent steering 'joggling' in Phantom II cars. | 31th Aug 1931 | Morton \ M19 img223 | |
| Blueprint diagram for a steering 'Snatchmeter' device. | 31th Aug 1931 | Morton \ M19 img224 | |
| Graphs showing the maximum forward and backward movement of a spring eye for a flexible shackle under various test conditions. | 31th Aug 1931 | Morton \ M19 img225 | |
| Analysis of crankcase cracking in two test bed engines and proposed solutions to strengthen the design. | 31th Aug 1931 | Morton \ M19 img226 | |
| Experimental work to improve car cooling systems, including tests on dented radiator tubes. | 1st Sep 1931 | Morton \ M19 img227 | |
| Engine overheating issues and potential solutions involving different tube types for various car models. | 2nd Sep 1931 | Morton \ M19 img228 | |
| Tests of twin carburetters for the Phantom II, detailing flooding issues related to different float designs. | 7th Sep 1931 | Morton \ M19 img229 | |
| Technical note on carburettor adjustments and modifications for slow running. | 7th Sep 1931 | Morton \ M19 img230 | |
| Technical note on adjustments and tests for variable valves and diffusers. | 17th Sep 1931 | Morton \ M19 img231 | |
| Blueprint of a slow running scheme for a twin choke carburettor. | 16th Feb 1931 | Morton \ M19 img232 | |
| Analysis of power output tests on a Phantom II engine, focusing on the effects of different camshaft and valve configurations. | 8th Sep 1931 | Morton \ M19 img233 | |
| Engine power output related to different valve sizes and camshaft timings. | 8th Sep 1931 | Morton \ M19 img234 | |
| Graph comparing the performance (BHP vs RPM) of twin carburettor setups with different choke sizes against a standard carburettor system. | 20th Jan 1931 | Morton \ M19 img235 | |
| Graph comparing Brake Horse Power and Brake Mean Effective Pressure for large vs small valves under different carburetor configurations. | 20th Aug 1931 | Morton \ M19 img236 | |
| Performance graph comparing high lift rockers, showing B.M.E.P. against R.P.M. for different valve lifts and carburettors. | 9th Aug 1931 | Morton \ M19 img237 | |
| Performance graph comparing engine configurations with different valve lift timings and a machined head. | 9th Aug 1931 | Morton \ M19 img238 | |
| Performance graph showing the effect of increased valve lift on a 4.78 compression ratio engine. | 9th Aug 1931 | Morton \ M19 img239 | |
| Performance comparison graph showing the effect of various inlet valve durations for different cam profiles. | 9th Aug 1931 | Morton \ M19 img240 | |
| Graph comparing engine performance with different valve sizes, carburettors, and timings on a W.W. 114° camshaft. | 9th Aug 1931 | Morton \ M19 img241 | |
| Performance chart showing the effect of increased valve lift on a standard camshaft and cylinder head. | 9th Aug 1931 | Morton \ M19 img242 | |
| Blueprint drawing of an inlet valve with a 30-degree seat and small diameter. | 19th Sep 1931 | Morton \ M19 img243 | |
| P.2 Cooling Tests, specifically regarding air pressure under the bonnet. | 19th Sep 1931 | Morton \ M19 img244 | |
| Blueprints and the production impracticality of 5/1 and 5½/1 compression ratio heads without a complete redesign. | 22th Sep 1931 | Morton \ M19 img245 | |
| Phantom II cooling tests comparing hexagonal matrix radiator tubes and the effects of ventilation on a 25-EX chassis. | 30th Sep 1931 | Morton \ M19 img246 | |
| Tests showing high air temperatures under the floorboards, highlighting the discomfort and need for improved ventilation. | 30th Sep 1931 | Morton \ M19 img247 | |
| Analysing the power output of the Phantom II P.2 engine based on tests with different choke sizes, camshafts, and carburetter configurations. | 2nd Oct 1931 | Morton \ M19 img248 | |
| Carburetter types, their performance characteristics, and required dimensions for different engine models. | 2nd Oct 1931 | Morton \ M19 img249 | |
| Power output and testing of the Model Continental car. | 5th Oct 1931 | Morton \ M19 img250 | |
| Power loss in the P.2. exhaust system and concerns for customers with the Continental Type model. | 9th Oct 1931 | Morton \ M19 img251 | |
| Status of fitting experimental modified exhaust manifolds to a Phantom 1 and another car. | 6th Oct 1931 | Morton \ M19 img252 | |
| Performance issues and modifications for a 25-EX fitted with an A.C. petrol pump. | 3rd Oct 1931 | Morton \ M19 img253 | |
| Experiments and modifications conducted on a Phantom II petrol pump, comparing its performance with an A.C. pump. | 3rd Oct 1931 | Morton \ M19 img254 | |
| Increased performance tests of a 27-EX car at Brooklands track with non-standard engine parts. | 5th Oct 1931 | Morton \ M19 img255 | |
| Proposal for modifications to be adopted as standard for the flip flap shutters on the 22-EX rivetless bonnet. | 19th Oct 1931 | Morton \ M19 img256 | |
| Clearances, dimensions, and paint thickness for bonnet shutters. | 21th Oct 1931 | Morton \ M19 img257 | |
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