| Description | Date | Identifier | |
| Inquiry regarding modifications to the car suspension for the Prince of Wales to reduce swaying. | 30th May 1930 | Box 52 \ 4 Scan113 | |
| Correspondence authorizing the fitting of stronger springs and special friction shock absorbers to the Prince of Wales' car. | 30th May 1930 | Box 52 \ 4 Scan114 | |
| Modifications to the suspension of the Prince of Wales' car. | 30th May 1930 | Box 52 \ 4 Scan115 | |
| Spring specifications for a car and assigning a non-standard job to the Experimental or Repair department. | 30th May 1930 | Box 52 \ 4 Scan116 | |
| Inquiry about the supply of Miller cord tyres for experimental testing. | 2nd Mar 1922 | Box 53 \ 1 Scan001 | |
| Quotation from Industrial Rubber Products Ltd. for a trial set of Miller Cord Tyres and Tubes. | 11th Mar 1922 | Box 53 \ 1 Scan002 | |
| Letter from Industrial Rubber Products Ltd. detailing an increased mileage guarantee for tyres. | 11th Mar 1922 | Box 53 \ 1 Scan003 | |
| Guarantee certificate for a 'Miller Cover', outlining the terms for repair or replacement. | 17th Feb 1922 | Box 53 \ 1 Scan004 | |
| Query about tire sizes from Industrial Rubber Products Limited. | 17th Feb 1922 | Box 53 \ 1 Scan005 | |
| Tire suppliers, tire sizes, and the associated commercial considerations. | 17th Feb 1922 | Box 53 \ 1 Scan006 | |
| Letter from Industrial Rubber Products discussing Miller tire sizes and options for a customer's vehicle. | 16th Feb 1922 | Box 53 \ 1 Scan007 | |
| Letter from Industrial Rubber Products Ltd. regarding tire sizes and an enclosed booklet. | 16th Feb 1922 | Box 53 \ 1 Scan008 | |
| Memo requesting a matter be classified into 'Works' or 'Experimental' channels. | 13th Feb 1922 | Box 53 \ 1 Scan009 | |
| Correspondence with Mr. Cooper of Industrial Rubber Products Limited regarding tire discounts and company history. | 13th Feb 1922 | Box 53 \ 1 Scan010 | |
| Correspondence and business dealings with Industrial Rubber Products Limited concerning tires and discounts. | 13th Feb 1922 | Box 53 \ 1 Scan011 | |
| Letter from Industrial Rubber Products discussing straight-sided cord tyres versus beaded edge tyres, and proposing a test for Miller Cord Tyres. | 7th Feb 1922 | Box 53 \ 1 Scan012 | |
| Letter comparing tyre mileage guarantees and costs per mile from different manufacturers. | 10th Feb 1922 | Box 53 \ 1 Scan013 | |
| Letter from Industrial Rubber Products, Limited, concerning the pricing and specifications of Miller cord tyres. | 10th Feb 1922 | Box 53 \ 1 Scan014 | |
| Letter detailing the features of a tyre and discussing potential manufacturing. | 30th May 1930 | Box 53 \ 1 Scan015 | |
| Potential market for high-powered motor-boat engines, following a meeting with a Capt. Nicholson from Saunders'. | 30th May 1930 | Box 53 \ 1 Scan016 | |
| Cover note for a specification of 'Fiat' engines handed over by Captain Nicholson. | 30th May 1930 | Box 53 \ 1 Scan017 | |
| Chronological history of communications with Saunders regarding the suitability of Condor engines for high-speed patrol boats. | 2nd Jun 1930 | Box 53 \ 1 Scan018 | |
| Follow-up letter to Saunders-Roe regarding a lack of reply to a previous correspondence. | 15th May 1930 | Box 53 \ 1 Scan019 | |
| Letter to Saunders-Roe Ltd. regarding considerations for using the Condor engine in Coastal Motor Boats. | 15th May 1930 | Box 53 \ 1 Scan020 | |
| Page 2 of a letter to Messrs. Saunders-Roe, Ltd. regarding the Condor Series 111B engine. | 15th May 1930 | Box 53 \ 1 Scan021 | |
| Potential competition for engines for Coastal Motor Boats. | 23th Sep 1930 | Box 53 \ 1 Scan022 | |
| Business opportunity of supplying engines for Coastal Motor Boats (C.M.B.'s) to the Admiralty and foreign governments. | 23th Sep 1930 | Box 53 \ 1 Scan023 | |
| Arranging for a demonstration of an Oscilloscope by Mr. Davey of Messrs. Herbert Kennedy & Co. | 11th Aug 1922 | Box 53 \ 1 Scan024 | |
| Forthcoming demonstration of an Oscilloscope. | 14th Aug 1922 | Box 53 \ 1 Scan025 | |
| Demonstration of the Elverson Oscilloscope on a Goshawk engine. | 16th Aug 1922 | Box 53 \ 1 Scan026 | |
| Recommendation to purchase an apparatus for observing machinery, detailing its features and price. | 16th Aug 1922 | Box 53 \ 1 Scan027 | |
| Providing the address for The Oscilloscope Syndicate Ltd., in relation to the Elverson Oscilloscope. | 16th Aug 1922 | Box 53 \ 1 Scan028 | |
| Revised offer for an Elverson Oscilloscope, enclosing a related letter. | 23th Oct 1922 | Box 53 \ 1 Scan029 | |
| Letter from Herbert Kennedy & Co. offering discounted prices and instalment payments for Oscilloscope sets. | 16th Oct 1922 | Box 53 \ 1 Scan030 | |
| Limited-time 5% discount offer for the purchase of an Elverson Oscilloscope. | 24th Oct 1922 | Box 53 \ 1 Scan031 | |
| Confirmation of a wire agreeing to the purchase of an Elverson Oscilloscope. | 26th Oct 1922 | Box 53 \ 1 Scan032 | |
| Confirming the agreement to purchase an Elverson Oscilloscope via telegram. | 26th Oct 1922 | Box 53 \ 1 Scan033 | |
| Announcing the receipt and availability of an Elverson oscilloscope for aero engine use. | 20th Nov 1922 | Box 53 \ 1 Scan034 | |
| From EFC to Mr. Tonge enclosing a report on the use of an oscilloscope. | 10th Jul 1923 | Box 53 \ 1 Scan035 | |
| The modification of an oscilloscope to make it a self-contained, portable unit. | 10th Jul 1923 | Box 53 \ 1 Scan036 | |
| Cover note discussing a previous agreement about an apparatus, enclosing an original letter from The New Oscilloscope Company Limited. | 21th Apr 1926 | Box 53 \ 1 Scan037 | |
| Letter from The New Oscilloscope Company Ltd. regarding a new Vibrating Wire Stroboscope. | 20th Apr 1926 | Box 53 \ 1 Scan038 | |
| Confirming the availability of stroboscopic apparatus in response to a query about an oscilloscope. | 23th Apr 1926 | Box 53 \ 1 Scan039 | |
| Article from 'Automotive Industries' on using a Stroborama to observe torsional crankshaft vibration. | 5th Mar 1927 | Box 53 \ 1 Scan040 | |
| Article from Automotive Industries describing the operation of a new diaphragm pump for an AC fuel supply system. | 5th Mar 1927 | Box 53 \ 1 Scan041 | |
| Journal page detailing a Stroborama circuit and the features of a new LaSalle V-Eight engine. | 5th Mar 1927 | Box 53 \ 1 Scan042 | |
| Article on solving automotive manufacturing problems through metallurgy. | 5th Mar 1927 | Box 53 \ 1 Scan043 | |
| Letter from The New Oscilloscope Company Limited enclosing their new catalogue. | 3rd Sep 1927 | Box 53 \ 1 Scan044 | |
| Booklet for The Elverson Oscilloscope, also known as The Mechanical Time-Microscope. | 3rd Sep 1927 | Box 53 \ 1 Scan045 | |
| Advertising leaflet for The Elverson Oscilloscope from The New Oscilloscope Company, Limited. | 3rd Sep 1927 | Box 53 \ 1 Scan046 | |
| Explaining the function and application of the Elverson Oscilloscope for machinery analysis. | 3rd Sep 1927 | Box 53 \ 1 Scan047 | |
| Extract from a booklet featuring testimonials and applications for an oscilloscope, including a photograph of a 'Type B' Gearbox. | 3rd Sep 1927 | Box 53 \ 1 Scan048 | |
| Testimonials and applications for an oscilloscope, including a list of users. | 3rd Sep 1927 | Box 53 \ 1 Scan049 | |
| Promotional document listing users and applications for an oscilloscope, including testimonials and industry-specific uses. | 3rd Sep 1927 | Box 53 \ 1 Scan050 | |
| Brochure for 'The Elverson Oscilloscope' demonstrating its stroboscopic effect on a sewing machine. | 3rd Sep 1927 | Box 53 \ 1 Scan051 | |
| List of US users and applications for an oscilloscope, with user testimonials. | 3rd Sep 1927 | Box 53 \ 1 Scan052 | |
| List of users and instructions for the Type 'A' Oscilloscope. | 3rd Sep 1927 | Box 53 \ 1 Scan053 | |
| Description of Type 'A' and 'B' oscilloscopes with a cross-section of a Type 'A' gearbox and a testimonial from Benz & Cie. | 3rd Sep 1927 | Box 53 \ 1 Scan054 | |
| Illustrated catalog page for 'The Elverson' Oscilloscope, types A and B. | 3rd Sep 1927 | Box 53 \ 1 Scan055 | |
| Questions and answers guide on using an oscilloscope for machinery analysis, including prices and a list of users. | 3rd Sep 1927 | Box 53 \ 1 Scan056 | |
| List of international oscilloscope users and an accompanying feedback postcard. | 26th Sep 1927 | Box 53 \ 1 Scan057 | |
| Letter from Vlies & Benson regarding a new stroboscopic apparatus called 'Stroborama' for examining motor engines. | 26th Sep 1927 | Box 53 \ 1 Scan058 | |
| Product brochure for the STROBORAMA, Type A stroboscope, detailing its features and applications. | 26th Sep 1927 | Box 53 \ 1 Scan059 | |
| Promotional document showcasing applications of the Strobodrama, Type A, used to study a locomotive valve gear and a Pelton wheel. | 10th Feb 1928 | Box 53 \ 1 Scan060 | |
| Letter from A.J. Ashdown, Ltd. regarding a special offer on the Ashdown Rotoscope. | 10th Feb 1928 | Box 53 \ 1 Scan061 | |
| Letter from consulting engineer Frank L. Sessions regarding the use and potential purchase of an Ashdown Rotoscope. | 9th May 1927 | Box 53 \ 1 Scan062 | |
| Brochure for the Ashdown Rotoscope shown at the 1928 British Industries Fair. | 21th Sep 1928 | Box 53 \ 1 Scan063 | |
| Promotional leaflet for the Ashdown Rotoscope, detailing its features and listing its users across various industries. | 21th Sep 1928 | Box 53 \ 1 Scan064 | |
| Photograph of a hand-cranked Rotoscope device with its internal mechanism visible. | 6th Feb 1928 | Box 53 \ 1 Scan065 | |
| 'Stroborama' stroboscopic device for experimental work on engine components. | 6th Feb 1928 | Box 53 \ 1 Scan066 | |
| Letter describing the speed control of a motor and a method for determining vibration frequency. | 20th Feb 1928 | Box 53 \ 1 Scan067 | |
| Letter from A. J. Ashdown, Ltd. regarding a quotation and price increase for the Ashdown Rotoscope. | 20th Feb 1928 | Box 53 \ 1 Scan068 | |
| 'Stroborama' apparatus, including an attached letter and a proposed demonstration. | 23th Feb 1928 | Box 53 \ 1 Scan069 | |
| Follow-up letter from Vlies & Benson Ltd. regarding a demonstration of their Stroborama instruments. | 22th Feb 1928 | Box 53 \ 1 Scan070 | |
| Improving oscilloscope illumination for the Strobodrama by applying the pilot and power principle. | 24th Feb 1928 | Box 53 \ 1 Scan071 | |
| Recommendation to purchase an Ashdown Rotoscope for experimental purposes to solve engine failures. | 13th Mar 1928 | Box 53 \ 1 Scan072 | |
| Letter from Maurice Olley of Rolls-Royce of America to E. W. Hives regarding experimental work on the 'Stroborama'. | 15th Mar 1928 | Box 53 \ 1 Scan073 | |
| The retention of a 4-Goshawk-11 car for demonstration and the associated arrangements for its driver and journey. | 27th Sep 1922 | Box 53 \ 1 Scan074 | |
| Request for an expert driver for the Goshawk model to provide instruction in London during Show week. | 28th Sep 1922 | Box 53 \ 1 Scan075 | |
| Instructions for the preparation and appearance of Mr. Royce's Goshawk engine for trials and press photography. | 29th Sep 1922 | Box 53 \ 1 Scan076 | |
| Dispatch of a 4-Goshawk-11 car and a colour sample to London. | 29th Sep 1922 | Box 53 \ 1 Scan077 | |
| The preparation of Mr. Royce's Goshawk for trials, ensuring it has a smart appearance for demonstration and press photography. | 29th Sep 1922 | Box 53 \ 1 Scan078 | |
| Unsatisfactory paint finish on car 4-Goshawk-11 and arrangements for its rectification. | 29th Sep 1922 | Box 53 \ 1 Scan079 | |
| Arranging for Mr. Warwick to visit London to answer questions regarding the Goshawk. | 29th Sep 1922 | Box 53 \ 1 Scan080 | |
| Telegram reporting unstable carburation and poor performance on a Goshawk demonstration vehicle. | 5th Oct 1922 | Box 53 \ 1 Scan081 | |
| Delayed arrival, cleaning, and re-painting of a Goshawk II demonstration car. | 5th Oct 1922 | Box 53 \ 1 Scan082 | |
| The availability of a '4/Goshawk/11' Open Trials Car for use in London. | 10th Oct 1922 | Box 53 \ 1 Scan083 | |
| Performance of a 20-HP Demonstration Car after a new lower gear was fitted. | 9th Oct 1922 | Box 53 \ 1 Scan084 | |
| Critical performance review of a 20 HP demonstration car, highlighting issues with the engine and ride. | 6th Oct 1922 | Box 53 \ 1 Scan085 | |
| Car testing, modifications including carburation and pistons, and future demonstration plans for a 40/50 HP car. | 10th Oct 1922 | Box 53 \ 1 Scan086 | |
| Performance issues, specifically vibration and a smokey exhaust, on car 4-Goshawk-11. | 10th Oct 1922 | Box 53 \ 1 Scan087 | |
| Change of axle ratios on the Goshawk-11 car for demonstration runs. | 10th Oct 1922 | Box 53 \ 1 Scan088 | |
| From Hr. to Hs. attaching a document concerning Demonstration Runs. | 12th Oct 1922 | Box 53 \ 1 Scan089 | |
| Outlining the policy for conducting vehicle demonstration runs and interacting with customers. | 11th Oct 1922 | Box 53 \ 1 Scan090 | |
| Demonstration car delivered in an unsatisfactory condition, the resulting failure, and preparation for a conference. | 23th Oct 1922 | Box 53 \ 1 Scan091 | |
| The return of Mr. Royce's experimental car, loaned until the Goshawk Trials cars were ready. | 15th Nov 1922 | Box 53 \ 1 Scan092 | |
| The disposal of the '4 Goshawk 11' Experimental Car. | 20th Nov 1922 | Box 53 \ 1 Scan093 | |
| Requesting the transfer of a 4-Goshawk-11 to Derby, along with a report on its behaviour and criticisms. | 21th Nov 1922 | Box 53 \ 1 Scan094 | |
| Returning the '4 Goshawk 11' car due to lack of power and other engine issues. | 23th Nov 1922 | Box 53 \ 1 Scan095 | |
| Investigation into a Goshawk-11 car's lack of power, identifying a burnt exhaust valve due to incorrect tappet adjustment. | 24th Nov 1922 | Box 53 \ 1 Scan096 | |
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