| Description | Date | Identifier | |
| Instructions requested for replacing broken or damaged parts on Chassis 1718 following an overhaul for second-hand sale. | 27th Jan 1914 | Box 20 \ 11 Scan057 | |
| List of cars currently in the Experimental Shop. | 27th Jan 1914 | Box 20 \ 11 Scan058 | |
| The potential sale of an experimental chassis. | 18th Apr 1914 | Box 20 \ 11 Scan059 | |
| Sale of an experimental chassis and a proposal to build one from existing parts. | 20th Apr 1914 | Box 20 \ 11 Scan060 | |
| The construction and sale of an experimental chassis from repurposed parts. | 28th Apr 1914 | Box 20 \ 11 Scan061 | |
| The current location of specific chassis originally reserved for experimental purposes. | 20th May 1914 | Box 20 \ 11 Scan062 | |
| Providing an update on the status and location of several experimental chassis. | 20th May 1914 | Box 20 \ 11 Scan063 | |
| The availability of an experimental chassis for sale. | 4th Jul 1914 | Box 20 \ 11 Scan064 | |
| Sale of an experimental chassis, stating none are currently available for disposal. | 7th Jul 1914 | Box 20 \ 11 Scan065 | |
| Sale of experimental car chassis 2301, noting its reinforced cracked frame. | 9th Jul 1914 | Box 20 \ 11 Scan066 | |
| Request for a high-mileage car for testing improvements, with a handwritten response detailing specific engine and brake tests to be conducted. | 8th Sep 1914 | Box 20 \ 11 Scan067 | |
| Running of an experimental car to test new Ferodo lined brakes. | 9th Sep 1914 | Box 20 \ 11 Scan068 | |
| Supply of a car for testing new scraper ring pistons and Ferodo brake liners, with a handwritten reply. | 11th Sep 1914 | Box 20 \ 11 Scan069 | |
| Changing Mr. Hanbury's car, 49 EB, to an experimental open touring model. | 14th Sep 1914 | Box 20 \ 11 Scan070 | |
| The sale of a new Kellner Double Limousine Body to the Admiralty and crediting the Experimental Department. | 25th Sep 1914 | Box 20 \ 11 Scan071 | |
| Potential disposal and valuation of Experimental Car No. 2301. | 29th Sep 1914 | Box 20 \ 11 Scan072 | |
| Preparation of experimental cars for sale to the War Office or Admiralty. | 30th Sep 1914 | Box 20 \ 11 Scan073 | |
| Specifications for various vehicle chassis numbers. | 1st Oct 1914 | Box 20 \ 11 Scan074 | |
| Inquiring with the Sales department about the likelihood of selling four specific cars to the War Office or Admiralty. | 1st Oct 1914 | Box 20 \ 11 Scan075 | |
| Instruction to the Repair Department to overhaul four chassis for sale as second-hand cars. | 2nd Oct 1914 | Box 20 \ 11 Scan076 | |
| Clarification on the prices for chassis and car bodies for sale. | 28th Oct 1914 | Box 20 \ 11 Scan077 | |
| To the Repair Department regarding incorrect record cards for experimental cars undergoing overhaul. | 5th Oct 1914 | Box 20 \ 11 Scan078 | |
| Clarifying that the Sales department is responsible for setting the price for chassis and bodies. | 6th Oct 1914 | Box 20 \ 11 Scan079 | |
| The withdrawal of an experimental car from sale. | 6th Oct 1914 | Box 20 \ 11 Scan080 | |
| Instruction to the Repair Department to re-build chassis 2300 instead of parting with it. | 6th Oct 1914 | Box 20 \ 11 Scan081 | |
| Letter explaining that an experimental car cannot be spared for use due to others being sold or requisitioned. | 6th Oct 1914 | Box 20 \ 11 Scan082 | |
| To Mr Pope confirming the sale of the body for Chassis 15 LB, which belonged to the Experimental Department. | 7th Oct 1914 | Box 20 \ 11 Scan083 | |
| Policy memo regarding the disposition of cars in the Experimental Department. | 7th Oct 1914 | Box 20 \ 11 Scan084 | |
| Progress report on the Northcliffe and Williamson chassis, and chassis 3000. | 7th Oct 1914 | Box 20 \ 11 Scan085 | |
| Instruction note requesting the use of a car for a Sunday afternoon. | 9th Oct 1917 | Box 20 \ 11 Scan086 | |
| Explaining the history of a partly-finished car body that was cancelled by Mr Royce. | 20th Oct 1914 | Box 20 \ 11 Scan087 | |
| Fitting a body to chassis 2301 and arranging a customer demonstration. | 3rd Nov 1914 | Box 20 \ 11 Scan088 | |
| Internal memorandum concerning the completion of record cards for three specific chassis, with a handwritten reply. | 9th Dec 1914 | Box 20 \ 11 Scan089 | |
| Letter regarding record cards for chassis 2301, 2200, and 2100E, explaining the experimental filing system. | 9th Dec 1914 | Box 20 \ 11 Scan090 | |
| Report with conflicting handwritten notes on the completion status and required parts for chassis 2301, 2200 and 2100E. | 14th Jul 1938 | Box 20 \ 11 Scan091 | |
| The expenses for preparing a car for experimental purposes. | 9th Feb 1915 | Box 20 \ 11 Scan092 | |
| Dispute over charges for cleaning the 1200 car for experimental purposes. | 3rd Feb 1915 | Box 20 \ 11 Scan093 | |
| Insurance coverage for a lighting battery destroyed by a short circuit on chassis 1926. | 22th Feb 1915 | Box 20 \ 11 Scan094 | |
| Car loaned to Mr. Ionides for the purpose of designing a special suspension. | 30th Mar 1915 | Box 20 \ 11 Scan095 | |
| Internal memorandum regarding the sale of the 'Mystery' and reusing its parts on a Northcliffe and Williamson chassis. | 4th Apr 1915 | Box 20 \ 11 Scan096 | |
| Current fleet of experimental cars and the possibility of selling one. | 21th Apr 1915 | Box 20 \ 11 Scan097 | |
| Status of experimental cars and seeking a decision on whether to sell one. | 26th Feb 1913 | Box 20 \ 11 Scan098 | |
| Options for building a new experimental car, considering a replica of the 49GB or a compromise using Northcliffe parts. | 26th Feb 1915 | Box 20 \ 11 Scan099 | |
| The handover of car 1200 from the Experimental Department for sale. | 14th May 1915 | Box 20 \ 11 Scan100 | |
| Instruction suggesting the addition of the letter 'X' to the number of all experimental chassis for identification. | 7th May 1915 | Box 20 \ 11 Scan101 | |
| The re-numbering of experimental chassis with the suffix 'X' to prevent errors with spare parts. | 7th May 1915 | Box 20 \ 11 Scan102 | |
| The status of experimental chassis 7CA and 49GB, detailing modifications and delays. | 22th Jun 1915 | Box 20 \ 11 Scan103 | |
| Status report on various cars including a Mercedes chassis, a Delaunay-Belleville, and a Daimler. | 22th Jun 1915 | Box 20 \ 11 Scan104 | |
| Noting that the Sales department was informed about an item for sale. | 8th Jul 1915 | Box 20 \ 11 Scan105 | |
| Whether to sell car 1926, deferring the decision until other experimental cars are returned. | 8th Jul 1915 | Box 20 \ 11 Scan106 | |
| Whether to sell car 1926 and the required repairs for car 49GB. | 9th Jul 1915 | Box 20 \ 11 Scan107 | |
| Prioritizing work on a car returning from Holmes Bros over aero engine work. | 16th Jul 1915 | Box 20 \ 11 Scan108 | |
| Conditions under which experimental car 1926 can be sold. | 16th Jul 1915 | Box 20 \ 11 Scan109 | |
| The delay of experimental car 49GB due to a supply issue with wings, and a proposal to sell car 1926. | 6th Aug 1915 | Box 20 \ 11 Scan110 | |
| Giving instructions for the sale of experimental Chassis 1926X as a second-hand car. | 9th Aug 1915 | Box 20 \ 11 Scan111 | |
| Internal query requesting further particulars for chassis 1926X, with handwritten notes detailing its specifications. | 10th Aug 1915 | Box 20 \ 11 Scan112 | |
| Suggesting a Delaynay-Belleville vehicle be taken to Derby for examination by the chief draughtsmen. | 10th Aug 1915 | Box 20 \ 11 Scan113 | |
| List of particulars for chassis 1926X, including the body, steering, rims and horns. | 11th Aug 1915 | Box 20 \ 11 Scan114 | |
| The stock-taking of experimental and demonstration cars at Derby and their potential for sale. | 29th Jan 1931 | Box 20 \ 11 Scan115 | |
| Request for a reply regarding three experimental cars at Derby for stock-taking. | 10th Nov 1915 | Box 20 \ 11 Scan116 | |
| The status and ownership of various cars and chassis at Derby. | 20th Nov 1915 | Box 20 \ 11 Scan117 | |
| Comparing an estimate for an open touring body with pre-war prices and requesting information on other body makers. | 18th Dec 1918 | Box 20 \ 11 Scan118 | |
| List of missing parts and faults on a test chassis received in the Experimental Department. | 24th Feb 1920 | Box 20 \ 11 Scan119 | |
| The sale of four American cars and a request for their cost. | 14th Jan 1922 | Box 20 \ 11 Scan120 | |
| Condition and pricing of second-hand American cars received from the U.S.A. | 26th Jan 1921 | Box 20 \ 11 Scan121 | |
| Requesting a list of experimental cars and their running costs for a report. | 14th Sep 1921 | Box 20 \ 11 Scan122 | |
| List of cars under the control of the Experimental Department, with specifications and performance data. | 15th Sep 1921 | Box 20 \ 11 Scan123 | |
| Requesting arrangements for a person named Roy to use specially tested cars and inquiring about the current testing routine. | 14th Sep 1923 | Box 20 \ 11 Scan124 | |
| Information from Mr. Hives to reply to a paragraph in an attached document. | 18th Sep 1923 | Box 20 \ 11 Scan125 | |
| The unlogged removal of cars from the Experimental Department at night. | 13th Dec 1923 | Box 20 \ 11 Scan126 | |
| Clarifying regulations for cars leaving the Experimental Department via the private gate. | 14th Dec 1923 | Box 20 \ 11 Scan127 | |
| Clarifying the regulations for cars leaving the Works via the private gate and the requirement for a pass-out ticket. | 14th Dec 1923 | Box 20 \ 11 Scan128 | |
| Memo requesting the return of a document with remarks. | 14th Dec 1923 | Box 20 \ 11 Scan129 | |
| Instructing that a proper Log Book be supplied to the Experimental Department to comply with the law. | 17th Dec 1923 | Box 20 \ 11 Scan130 | |
| Listing cars in the Experimental Department, including those for 4-wheel brake experiments. | 7th Jan 1924 | Box 20 \ 11 Scan131 | |
| Complaining about a lack of response regarding potential engine failures and a decline in the spirit of the Experimental Department. | 7th Jan 1924 | Box 20 \ 11 Scan132 | |
| Potential failures, production readiness, and initial road test faults of the EAC-1 engine. | 10th Jan 1924 | Box 20 \ 11 Scan133 | |
| Listing engine and steering faults, followed by a defense of the Experimental Department's critical testing policy. | 10th Jan 1924 | Box 20 \ 11 Scan134 | |
| Page from a memo defending a critical stance towards experimental testing. | 8th Feb 1924 | Box 20 \ 11 Scan135 | |
| List of cars and chassis in the experimental shop, detailing their status and modifications. | 8th Feb 1924 | Box 20 \ 11 Scan136 | |
| Status report on various 20 HP cars and other makes, detailing their current condition and plans for disposal. | 19th Feb 1924 | Box 20 \ 11 Scan137 | |
| Adding two cars, Hawk-Northcliffe and 1-G-1, to the list of cars in the experimental shop. | 19th Feb 1924 | Box 20 \ 11 Scan138 | |
| List of cars in the Experimental Shop, detailing their chassis, body, accessories, and value. | 1st Jul 1924 | Box 20 \ 11 Scan139 | |
| Valuation list of various cars, detailing their chassis, body, and accessories. | 10th Jul 1924 | Box 20 \ 11 Scan140 | |
| Chasing an outstanding list of Aero Engines for the Experimental Department stock. | 10th Jul 1924 | Box 20 \ 11 Scan141 | |
| Potential issue regarding cars sent to France and Sales, and arranging a meeting to resolve it. | 1st Sep 1924 | Box 20 \ 11 Scan142 | |
| Listing cars being removed from the experimental list and their current status. | 1st Sep 1924 | Box 20 \ 11 Scan143 | |
| Outlining the procedure for testing and approving experimental cars. | 1st Sep 1924 | Box 20 \ 11 Scan144 | |
| List of cars in the Experimental Department with their current status and usage. | 30th Sep 1924 | Box 20 \ 11 Scan145 | |
| Providing an update on the status and location of various company cars. | 15th Dec 1924 | Box 20 \ 11 Scan146 | |
| Requesting a list of cars in the Experimental Department to be cleared for sale. | 15th Dec 1924 | Box 20 \ 11 Scan147 | |
| Status and sale recommendations for three experimental cars. | 18th Dec 1924 | Box 20 \ 11 Scan148 | |
| The status of cars 48-PK and 59-PK, and the modification of other cars into 'V' series chassis. | 1st Jan 1925 | Box 20 \ 11 Scan149 | |
| Disposal of an obsolete 40/50 HP chassis. | 1st Jan 1925 | Box 20 \ 11 Scan150 | |
| Listing the status and location of cars in the Experimental Department. | 19th Jan 1925 | Box 20 \ 11 Scan151 | |
| Continued list updating the status and departmental location of specific vehicles. | 2nd Feb 1925 | Box 20 \ 11 Scan152 | |
| Inventory and valuation list of cars in the Experimental Department. | 2nd Feb 1925 | Box 20 \ 11 Scan153 | |
| Details on an experimental 20 HP, 2-seater test-body car, not for standard production. | 24th Jun 1925 | Box 20 \ 11 Scan154 | |
| List of cars in the Experimental Department with their specifications and status. | 24th Jun 1925 | Box 20 \ 11 Scan155 | |
| Quarterly note requesting confirmation on the continued need for cars in the experimental department. | 30th Jun 1925 | Box 20 \ 11 Scan156 | |
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