| Description | Date | Identifier | |
| Weight comparison of Peregrine road springs from Firth and Woodhead. | 28th Dec 1932 | Box 2 \ 11 B002_X146-page7 | |
| Instruction regarding the supply and ordering of new Front Road Springs for the Peregrine II chassis. | 26th Jan 1933 | Box 2 \ 11 B002_X146-page8 | |
| The correct road spring ratings for different types of Peregrine saloon cars. | 30th Jan 1933 | Box 2 \ 11 B002_X146-page9 | |
| The ordering and replacement of front springs for the Peregrine II chassis. | 11th Feb 1938 | Box 2 \ 11 B002_X146-page10 | |
| Meeting notes discussing an accident caused by a steering pivot failure on a customer's car and proposed preventative inspections. | 8th Dec 1911 | Box 2 \ 12 B002_X168-page001 | |
| Committee decision on steering gear inspection protocols following an accident involving Mr. Mortimer Singer's car. | 3rd Apr 1912 | Box 2 \ 12 B002_X168-page002 | |
| Instruction to dismantle and investigate the cause of a bent front pivot section. | 3rd Apr 1912 | Box 2 \ 12 B002_X168-page003 | |
| Request for a report on the strength of standard steering pivots, which are failing after a lightening modification. | 1st Apr 1912 | Box 2 \ 12 B002_X168-page004 | |
| Departmental memo concerning two breakages on front axle pivots and the subsequent requirement for destruction and stress testing. | 27th Jan 1913 | Box 2 \ 12 B002_X168-page005 | |
| Potential modification of the torque tube test apparatus. | 27th Jan 1913 | Box 2 \ 12 B002_X168-page006 | |
| Bumping and revolving tests on front wheels and pivots due to torsional stress. | 6th Feb 1913 | Box 2 \ 12 B002_X168-page007 | |
| Internal instruction requesting comparative strength tests on old and new steering pivots. | 6th Feb 1913 | Box 2 \ 12 B002_X168-page008 | |
| Experiment testing the deflection and permanent set of a steering pivot under load. | 16th May 1938 | Box 2 \ 12 B002_X168-page009 | |
| Load test report on a stub axle pivot, detailing measurement data under increasing loads and observations on failure. | 16th May 1938 | Box 2 \ 12 B002_X168-page010 | |
| Test report detailing deflection and permanent set measurements under increasing weight for an old type steering pivot, resulting in a stub axle fracture. | 26th Feb 1913 | Box 2 \ 12 B002_X168-page011 | |
| Departmental memo outlining Mr Royce's suggestion for a bumping test on a front axle. | 26th Feb 1913 | Box 2 \ 12 B002_X168-page012 | |
| New bumping test for front axle pivots, as suggested by Mr Royce. | 27th Feb 1913 | Box 2 \ 12 B002_X168-page013 | |
| Failure of front axle pivots and proposing modifications to the design and materials to improve strength. | 27th Feb 1913 | Box 2 \ 12 B002_X168-page014 | |
| Testing front axle pivots, comparing different types under torsional stress. | 1st Jul 1932 | Box 2 \ 12 B002_X168-page015 | |
| Cause of a broken stub axle pivot and proposed design modifications. | 1st Jul 1932 | Box 2 \ 12 B002_X168-page016 | |
| Design of a broken stub axle and spring buffers. | 13th Dec 1910 | Box 2 \ 12 B002_X168-page017 | |
| Instructions from Mr. Royce on experiments to test and break front axle pivots. | 5th Mar 1913 | Box 2 \ 12 B002_X168-page018 | |
| Instructions for a series of tests and analyses on welded tubes, including stress tests and diagrammatic summaries. | 28th Feb 1913 | Box 2 \ 12 B002_X168-page019 | |
| The reproduction and testing of a fracture in steering pivots. | 6th Mar 1913 | Box 2 \ 12 B002_X168-page020 | |
| Outlining seven action points to address a component failure, including material testing, design changes, and reinforcement. | 1st May 1913 | Box 2 \ 12 B002_X168-page021 | |
| Steering pivot tests for experimental car 168, concluding that continuous turning is not the cause of pivot breakage. | 12th Mar 1913 | Box 2 \ 12 B002_X168-page022 | |
| Report investigating the cause of breaking and bending in steering pivots. | 12th Mar 1913 | Box 2 \ 12 B002_X168-page023 | |
| Tension tests on a cross steering tube under various road conditions. | 10th Dec 1931 | Box 2 \ 12 B002_X168-page024 | |
| Road tests concerning a Swedish iron axle, pivot breakages, and steering dynamics. | 10th Dec 1931 | Box 2 \ 12 B002_X168-page025 | |
| Stress tests conducted on steering pivots which resulted in a crack forming after running over obstacles. | 12th Mar 1913 | Box 2 \ 12 B002_X168-page026 | |
| Request for two experiments to be conducted on front pivots and steering components to investigate fractures. | 10th Mar 1913 | Box 2 \ 12 B002_X168-page027 | |
| Investigation into the cause of a fractured pivot. | 10th Mar 1917 | Box 2 \ 12 B002_X168-page028 | |
| Front pivot issues caused by unbalanced tyres and a proposal for a test to diagnose the problem. | 25th Mar 1929 | Box 2 \ 12 B002_X168-page029 | |
| To Mr. Johnson regarding progress on front pivots and Dunlop wheels. | 14th Mar 1913 | Box 2 \ 12 B002_X168-page030 | |
| Telegram from Royce requesting tests on pivot points and spring buffer designs. | 17th Mar 1913 | Box 2 \ 12 B002_X168-page031 | |
| Test report on the durability and safety of 'present type' pivots after the failure of the 'old type' pivots. | 17th Mar 1913 | Box 2 \ 12 B002_X168-page032 | |
| Potential issues with cross tubes on the 1700, 1800, and 1900 series Colonial cars. | 24th Oct 1922 | Box 2 \ 12 B002_X168-page033 | |
| Preliminary report on experimental tests of stronger pivots and the despatch of blueprints for inspectors. | 17th Mar 1913 | Box 2 \ 12 B002_X168-page034 | |
| To postpone an Axle Dropping Test due to the experiment being too slow. | 25th Mar 1930 | Box 2 \ 12 B002_X168-page035 | |
| Investigation, testing, and proposed design solutions for stub axle fractures. | 25th May 1913 | Box 2 \ 12 B002_X168-page036 | |
| Replacement of old pivots with a reinforced type based on recent test results. | 18th Mar 1913 | Box 2 \ 12 B002_X168-page037 | |
| Typed page discussing a conclusion on a line of action to be taken. | 13th Mar 1913 | Box 2 \ 12 B002_X168-page038 | |
| Telegram instructing the recipient to prepare drawings showing fractures for distribution. | 13th Mar 1913 | Box 2 \ 12 B002_X168-page039 | |
| Telegram warning about potential cracks in car pivots if a 'caniveau' (gutter) is hit at high speed. | 18th Mar 1913 | Box 2 \ 12 B002_X168-page040 | |
| Telegram from Paris regarding altering designs following a discovery. | 30th Aug 1906 | Box 2 \ 12 B002_X168-page041 | |
| Final report on experimental steering pivot tests conducted on a track. | 18th Mar 1913 | Box 2 \ 12 B002_X168-page042 | |
| Inspection notes on damage to a Cross Tube and Bottom Levers. | 18th Mar 1913 | Box 2 \ 12 B002_X168-page043 | |
| Material selection, testing, and improvement of front axle pivots. | 25th Mar 1912 | Box 2 \ 12 B002_X168-page044 | |
| Post Office Telegram regarding a design change for car axle pivots. | 12th Mar 1913 | Box 2 \ 12 B002_X168-page045 | |
| Confirmation of a telegram sent from the Nightingale Road, Derby office. | 7th Mar 1941 | Box 2 \ 12 B002_X168-page046 | |
| Blank confirmation of telegram form. | 7th Mar 1941 | Box 2 \ 12 B002_X168-page047 | |
| Blank confirmation of telegram form from the Nightingale Road, Derby office. | 25th May 1928 | Box 2 \ 12 B002_X168-page048 | |
| Design specifications for front pivots, focusing on weight reduction, strength, and bore dimensions. | 25th May 1928 | Box 2 \ 12 B002_X168-page049 | |
| Potential improvements and solutions for front axles to reduce stress and the risk of fracture. | 25th Mar 1918 | Box 2 \ 12 B002_X168-page050 | |
| Cause of broken pivots being an alteration to the cross steering tube and the need for new dies. | 18th Apr 1915 | Box 2 \ 12 B002_X168-page051 | |
| Temporary stoppage of forgings for the stub axle. | 1st Mar 1933 | Box 2 \ 12 B002_X168-page052 | |
| Final report detailing actions and suggestions for material and design improvements following a component failure. | 20th Mar 1913 | Box 2 \ 12 B002_X168-page053 | |
| Alteration to a steering box pendulum lever and a safety directive for cars on the road. | 14th Feb 1922 | Box 2 \ 12 B002_X168-page054 | |
| Typed memo regarding pivot design changes based on a telegram from Mr. Royce, and the subsequent drawing distribution. | 20th Mar 1913 | Box 2 \ 12 B002_X168-page055 | |
| Progress report to Mr. Wormald detailing car orders, work progress, and technical challenges. | 20th Mar 1913 | Box 2 \ 12 B002_X168-page056 | |
| Telegram from Paris requesting a copy of document SML 1813. | 28th Mar 1913 | Box 2 \ 12 B002_X168-page057 | |
| Departmental memo regarding the safety of front axle pivots and experiments with elastic cross steering tubes for cars pre-chassis 1900. | 25th Mar 1913 | Box 2 \ 12 B002_X168-page058 | |
| Telegram about the results of an experiment with buffer springs, requesting a written report. | 4th Dec 1913 | Box 2 \ 12 B002_X168-page059 | |
| Typed letter to Mr Johnson regarding a telegram from Paris which contained a clerical error. | 26th Mar 1913 | Box 2 \ 12 B002_X168-page060 | |
| Page 2 of a letter regarding an unavoidable delay and wiring a recipient. | 1st Nov 1921 | Box 2 \ 12 B002_X168-page061 | |
| Telegram from Johnson in Paris to Royce in Derby, requesting a copy of a memo regarding steering pivots. | 27th Mar 1913 | Box 2 \ 12 B002_X168-page062 | |
| Departmental memo confirming the despatch of a telegram to clarify a previous communication about steering pivots. | 26th Mar 1913 | Box 2 \ 12 B002_X168-page063 | |
| Letter to Mr Johnson apologising for a delay in supplying memos regarding axle pivots. | 26th Mar 1913 | Box 2 \ 12 B002_X168-page064 | |
| Typed letter regarding the forwarding of a memo and a list of Repair Shop inspectors. | 26th Mar 1913 | Box 2 \ 12 B002_X168-page065 | |
| Memo detailing work on a car, including replacing accumulators and a plug. | 29th Mar 1913 | Box 2 \ 12 B002_X168-page066 | |
| Experiments with spring buffers in conjunction with old type pivots. | 29th Mar 1913 | Box 2 \ 12 B002_X168-page067 | |
| Results and issues encountered during steering pivot tests. | 27th Mar 1913 | Box 2 \ 12 B002_X168-page068 | |
| Telegram regarding progress on buffer spring tests and acquiring a variety of springs for track testing. | 28th Mar 1913 | Box 2 \ 12 B002_X168-page069 | |
| Failure in the cross steering tube and potential modifications to prevent future issues. | 1st Nov 1923 | Box 2 \ 12 B002_X168-page070 | |
| Departmental memo detailing the results of a tensile test on a broken front axle pivot. | 2nd Apr 1913 | Box 2 \ 12 B002_X168-page071 | |
| Steering pivot tests conducted on a track to determine cracking times under various conditions. | 2nd Apr 1913 | Box 2 \ 12 B002_X168-page072 | |
| Test report detailing variations in cracking pivots and the failure of spring leaves during track testing. | 2nd Apr 1913 | Box 2 \ 12 B002_X168-page073 | |
| Steering pivot tests detailing the methodology and comparative results. | 2nd Apr 1913 | Box 2 \ 12 B002_X168-page074 | |
| Test report detailing the durability and fracture points of different pivot types under various conditions. | 2nd Apr 1913 | Box 2 \ 12 B002_X168-page075 | |
| Results of stress and failure tests on a new reinforced steering pivot. | 4th Apr 1918 | Box 2 \ 12 B002_X168-page076 | |
| Urgent instruction sheet regarding a cross-steering tube, including a diagram and specifications. | 4th Apr 1918 | Box 2 \ 12 B002_X168-page077 | |
| Urgent replacement of faulty axle pivots, including actions taken and the number of cars affected. | 4th Apr 1913 | Box 2 \ 12 B002_X168-page078 | |
| Axle pivot fractures, requesting a list of cars and a special examination of those in France. | 4th Apr 1913 | Box 2 \ 12 B002_X168-page079 | |
| Departmental memo concerning an investigation into pivot breakages, revealing errors in early record-keeping and drawings. | 5th Apr 1913 | Box 2 \ 12 B002_X168-page080 | |
| Design modification to pivots (C471/2) for the 700 series, where a change reduced their strength, causing a weakness in the cars. | 16th Apr 1913 | Box 2 \ 12 B002_X168-page081 | |
| Experimental Department weekly report detailing on-track testing and failures of steering pivots. | 10th Apr 1913 | Box 2 \ 12 B002_X168-page082 | |
| Modifications to the standard front axle to accommodate wood wheels. | 12th Apr 1913 | Box 2 \ 12 B002_X168-page083 | |
| Vehicle modifications and ongoing tests on steering pivots, balance weights, and valve springs. | 24th Apr 1918 | Box 2 \ 12 B002_X168-page084 | |
| Weak design and failure of front axle pivots. | 24th Apr 1918 | Box 2 \ 12 B002_X168-page085 | |
| Cover note for a final report on an experiment involving steering pivots fitted with spring bushes. | 22th Apr 1913 | Box 2 \ 12 B002_X168-page086 | |
| Final report on track testing steering pivots and cross steering tubes with spring buffers. | 22th Apr 1913 | Box 2 \ 12 B002_X168-page087 | |
| Component breakages and failures discovered during a three-week vehicle durability test. | 22th Apr 1913 | Box 2 \ 12 B002_X168-page088 | |
| Front axle pivots for Chassis 2301. | 22th Apr 1913 | Box 2 \ 12 B002_X168-page089 | |
| Telegram about the ineffectiveness of spring buffers in a cross steering tube. | 25th Apr 1913 | Box 2 \ 12 B002_X168-page090 | |
| Telegraph message concerning a cross tube experiment with other makes of cars for strength. | 15th Apr 1929 | Box 2 \ 12 B002_X168-page091 | |
| Relaying a telegram from Mr. Royce regarding an experiment on axle pivots and steering tube elasticity. | 26th Apr 1913 | Box 2 \ 12 B002_X168-page092 | |
| Relaying a wire from Mr Johnson regarding steering pivot fractures and requesting an urgent reply. | 28th Apr 1913 | Box 2 \ 12 B002_X168-page093 | |
| Telegraph message regarding a steering pivot test and clearance for the steering tube on a chassis. | 28th Apr 1915 | Box 2 \ 12 B002_X168-page094 | |
| Post Office Telegraph instructing to find the cause of a fracture. | 26th Dec 1917 | Box 2 \ 12 B002_X168-page095 | |
| Instruction sheet with a drawing and dimensions for manufacturing an experimental bent tube. | 29th Apr 1913 | Box 2 \ 12 B002_X168-page096 | |
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