| Description | Date | Identifier | |
| Weight of the 40/50 HP chassis, attaching a list of parts showing an increase in weight on the Phantom II. | 19th Jan 1933 | Box 18 \ 1 Scan059 | |
| Comparison table of part weights between N.2 and O.Series production, detailing chassis weight increase. | 12th Jan 1933 | Box 18 \ 1 Scan060 | |
| Weight discrepancy on the 40/50 HP Chassis between different series. | 20th Jan 1933 | Box 18 \ 1 Scan061 | |
| Weight increases for the 40/50 chassis due to various modifications and series changes. | 22th Jan 1933 | Box 18 \ 1 Scan062 | |
| Weight modifications for the O.series, calculating the net change and explaining a discrepancy. | 24th Jan 1933 | Box 18 \ 1 Scan063 | |
| Query about the weight increase of the Ph.II chassis and a request for the average weights of each series. | 7th May 1934 | Box 18 \ 1 Scan064 | |
| Revision of 20/25 and Phantom chassis weights and potential lightening measures. | 10th Aug 1934 | Box 18 \ 1 Scan065 | |
| Potential weight reduction strategies for the 40/50 chassis. | 5th Jul 1934 | Box 18 \ 1 Scan066 | |
| Weight of the Phantom chassis and the potential use of the lighter Vulture gearbox. | 9th Jul 1934 | Box 18 \ 1 Scan067 | |
| Comparison of chassis weights for Spectre, Phantom, and 20/25 HP models. | 9th Aug 1934 | Box 18 \ 1 Scan068 | |
| Comparative table of chassis weights for various car models. | 9th Aug 1934 | Box 18 \ 1 Scan069 | |
| Table comparing principal chassis dimensions across various car models. | 3rd Oct 1934 | Box 18 \ 1 Scan070 | |
| Requesting the weights of components for the Ph.II, 20/25 HP, and Bentley chassis. | 3rd Oct 1934 | Box 18 \ 1 Scan071 | |
| Requesting that all non-standard components be weighed before fitting to the chassis to monitor and reduce weight. | 29th Oct 1934 | Box 18 \ 1 Scan072 | |
| Cover note regarding weights obtained from the first two 'Spectre' cars built. | 29th Apr 1935 | Box 18 \ 1 Scan073 | |
| Complete weight analysis of Spectre cars against a standard Phantom II. | 29th Apr 1935 | Box 18 \ 1 Scan074 | |
| Complete weight analysis of Spectre cars compared against a revised Phantom II long type chassis. | 13th May 1935 | Box 18 \ 1 Scan075 | |
| Comparing the weights of a Hooper Limousine body shell and a Cadillac body shell. | 23th May 1935 | Box 18 \ 1 Scan076 | |
| Inability to obtain the weight of a Phantom II Continental touring body shell. | 19th Jun 1935 | Box 18 \ 1 Scan077 | |
| Weight comparison of Cadillac, Phantom II, and Phantom III frames. | 10th Jan 1936 | Box 18 \ 1 Scan078 | |
| Front end weight comparison memo for Bentley, Wraith, and Packard suspensions. | 24th Apr 1936 | Box 18 \ 1 Scan079 | |
| Comparison table of weights for front-end chassis components across various car models. | 24th Apr 1936 | Box 18 \ 1 Scan080 | |
| Comparison of chassis and body weights for Phantom II & Phantom III cars. | 3rd May 1936 | Box 18 \ 1 Scan081 | |
| Table comparing the weights of various engine units and components in pounds (lbs). | 3rd May 1936 | Box 18 \ 1 Scan082 | |
| Design of sheet metal wing stays and the arrangement of headlamps for the EAC.8 chassis. | 2nd Feb 1926 | Box 18 \ 2 Scan001 | |
| Coachwork modifications and delays for the first EAC.8 chassis, intended for France. | 10th Feb 1926 | Box 18 \ 2 Scan002 | |
| Supply and fitting arrangements for wings, valances, running boards and stepirons for a new chassis. | 3rd Sep 1926 | Box 18 \ 2 Scan003 | |
| Financial implications and potential withdrawal of work on front wing stays for the 40/50 HP Chassis. | 7th Sep 1928 | Box 18 \ 2 Scan004 | |
| The proposal to standardise front wing stays for the 40/50 HP chassis. | 24th Sep 1926 | Box 18 \ 2 Scan005 | |
| Standardization of front wing stays for the 40/50 HP chassis following a 10,000-mile test. | 25th Sep 1926 | Box 18 \ 2 Scan006 | |
| Design and implementation of front wing stays for the 40/50 HP chassis. | 27th Sep 1926 | Box 18 \ 2 Scan007 | |
| Querying why the cost of a front wing stay is considered negligible and asking for the actual cost. | 28th Oct 1926 | Box 18 \ 2 Scan008 | |
| Negligible cost difference for a new Front Wing Stay. | 29th Oct 1926 | Box 18 \ 2 Scan009 | |
| Instruction regarding the cost comparison of pressed steel body stays versus existing forged brackets. | 22th Jul 1925 | Box 18 \ 2 Scan010 | |
| Standardisation sheet memorandum regarding the cost-effectiveness of sheet metal front wing stays over forged brackets. | 29th Oct 1926 | Box 18 \ 2 Scan011 | |
| Standardisation sheet memo comparing the cost of present brackets with new front wing stays. | 30th Oct 1926 | Box 18 \ 2 Scan012 | |
| Standardisation of front wing stays, comparing costs and seeking opinions on their adoption by coachbuilders. | 1st Nov 1926 | Box 18 \ 2 Scan013 | |
| From BJ to Hs regarding the standardisation sheet for front wing stays and seeking approval. | 20th Nov 1926 | Box 18 \ 2 Scan014 | |
| Chasing approval from the Coachbuilding Committee for the standardisation of front wing stays for the Phantom. | 22th Nov 1926 | Box 18 \ 2 Scan015 | |
| Letter chasing the completion of a Phantom Cab De Ville body for an urgent trip to France. | 10th Jan 1927 | Box 18 \ 2 Scan016 | |
| Sending a scheme for a toolbox to be fitted in the running board of the EAC.7 first car. | 21th Jan 1927 | Box 18 \ 2 Scan017 | |
| The supply and fitting of wings, valances, and lamps for car EAC.7. | 2nd Jan 1927 | Box 18 \ 2 Scan018 | |
| The completion and collection of front wings and valances for chassis EAC.7. | 25th Jan 1927 | Box 18 \ 2 Scan019 | |
| Letter to coachbuilders Hoopers regarding the collection of front wings for chassis EAC.7. | 26th Jan 1927 | Box 18 \ 2 Scan020 | |
| The unavailability of a chassis engine layout drawing. | 26th Jan 1927 | Box 18 \ 2 Scan021 | |
| Standardisation of front wing stays for the 40/50 HP chassis. | 17th Feb 1927 | Box 18 \ 2 Scan022 | |
| Standardisation of chassis parts, specifically the front wing stay. | 22th Sep 1926 | Box 18 \ 2 Scan023 | |
| Design and fitment issues of sheet steel wing stays for the Phantom model. | 28th Mar 1927 | Box 18 \ 2 Scan024 | |
| Decision to continue with the E.2. Series and arranging a meeting in London. | 28th Mar 1927 | Box 18 \ 2 Scan025 | |
| Compatibility issues with sheet steel wing stays and headlamps on a Phantom model. | 31th Mar 1927 | Box 18 \ 2 Scan026 | |
| Modifications to wing stays, bonnet catches, and headlamp routing for Phantoms and other models. | 31th Mar 1927 | Box 18 \ 2 Scan027 | |
| Conclusions on the design and fitting of Phantom wing-stays following visits to coachbuilders. | 23th Apr 1927 | Box 18 \ 2 Scan028 | |
| Curvature of Phantom Wing Stays and a halt in production pending a new drawing. | 27th Apr 1927 | Box 18 \ 2 Scan029 | |
| Issues and specifications for Phantom wing stays. | 30th Apr 1927 | Box 18 \ 2 Scan030 | |
| Design and curvature of Phantom wing stays and mud wings in relation to coachbuilder specifications from Barkers. | 4th May 1927 | Box 18 \ 2 Scan031 | |
| The provision and fitting of step brackets and running boards for a sports chassis. | 22th Dec 1927 | Box 18 \ 2 Scan032 | |
| Issues with a dummy Alpine Sports Chassis and arrangements for modifications. | 29th Dec 1927 | Box 18 \ 2 Scan033 | |
| Excessive rear wing clearance on the 14-EX car. | 23th May 1928 | Box 18 \ 2 Scan034 | |
| Requesting maximum buffer deflection data from the next 10,000 miles test for 20 HP and 40/50 HP models. | 1st Aug 1928 | Box 18 \ 2 Scan035 | |
| Design and effectiveness of different wing styles on experimental cars, focusing on the mud 'lip' for cleanliness. | 1st Oct 1928 | Box 18 \ 2 Scan036 | |
| Problems with mud accumulation on car wings (fenders) and proposing design improvements. | 1st Oct 1928 | Box 18 \ 2 Scan037 | |
| Blueprint comparing 'Effective' and 'Ineffective' wing designs for experimental vehicles 10.E.X. and 15.E.X. | 4th Oct 1928 | Box 18 \ 2 Scan038 | |
| The reverse of a document showing a reception date stamp from the Derby facility. | 4th Oct 1928 | Box 18 \ 2 Scan039 | |
| Blueprint showing three different cross-sections of a front wing for the 15 EX model. | 1st Oct 1928 | Box 18 \ 2 Scan040 | |
| Blueprint detailing three cross-sections of the front wing for the 10 EX model. | 1st Oct 1928 | Box 18 \ 2 Scan041 | |
| Faint drawing with a purple 'Print Room, Derby' stamp. | 4th Oct 1928 | Box 18 \ 2 Scan042 | |
| The supply and finishing of wings, valances, and steps for model 18.EX. | 15th Oct 1928 | Box 18 \ 2 Scan043 | |
| Wheel arch clearances for 18-EX and 'SS' cars. | 18th Oct 1938 | Box 18 \ 2 Scan044 | |
| Incorrect heelboard length, requesting a corrected part be sent to Hooper's. | 20th Oct 1928 | Box 18 \ 2 Scan045 | |
| Following up on the non-receipt of schedules 2716/17 related to a heelboard. | 22th Oct 1928 | Box 18 \ 2 Scan046 | |
| Design and supply of Phantom wing stays, referencing issues with coachbuilders. | 23th Oct 1928 | Box 18 \ 2 Scan047 | |
| Mounting method for fixed headlamps, wing stays, and the number plate for car 18-EX. | 6th Nov 1928 | Box 18 \ 2 Scan048 | |
| Collecting parts from coachbuilder Hooper's and a new design scheme for valances and toolboxes on experimental cars. | 8th Dec 1928 | Box 18 \ 2 Scan049 | |
| To the Transport Department arranging the collection of two sets of wings and steps from Messrs. Hoopers. | 10th Dec 1929 | Box 18 \ 2 Scan050 | |
| Proposed friction-held cross member to address 'front jellying' in the SS frame. | 10th Jan 1929 | Box 18 \ 2 Scan051 | |
| The issues and additional costs associated with fitting a body from Barkers to the Experimental Saloon 18-EX. | 24th Jan 1929 | Box 18 \ 2 Scan052 | |
| The process and sequence for fitting and painting wings and valances for an 'SS' Open Car. | 6th Feb 1928 | Box 18 \ 2 Scan053 | |
| Returning wings to the Carlton Carriage Co. for painting to ensure a correct colour match with the body. | 19th Feb 1929 | Box 18 \ 2 Scan054 | |
| The design specifications for wing stays and head-lamp brackets for P.2 and 20/25 HP models. | 12th Apr 1930 | Box 18 \ 2 Scan055 | |
| Potential modifications to the wing stays on the 20/25 HP chassis. | 14th Apr 1930 | Box 18 \ 2 Scan056 | |
| Modifications to the front and rearmost wingstays for the 20/25 HP model. | 15th Apr 1930 | Box 18 \ 2 Scan057 | |
| Urgent preparation and selection of a Trials Car for the Paris Show, comparing chassis 21-EX and 1-WJ. | 26th Sep 1929 | Box 18 \ 3 Scan001 | |
| Plans to test a new Trials car in Paris to assess its steering and other features for future development. | 3rd Oct 1929 | Box 18 \ 3 Scan002 | |
| Road test report and feedback on a vehicle's performance improvements following work at the Derby factory. | 10th Oct 1929 | Box 18 \ 3 Scan003 | |
| Disagreement on the criticism of steering features and proposing a meeting. | 15th Oct 1929 | Box 18 \ 3 Scan004 | |
| Query regarding the usability of the steering handle for engine timing due to the introduction of a low inertia spring drive on the Phantom II. | 15th Oct 1929 | Box 18 \ 3 Scan005 | |
| Issues with car 21-EX, rendering it unfit for trials, and requesting urgent repairs. | 24th Oct 1929 | Box 18 \ 3 Scan006 | |
| Arranging experiments to be carried out on Chassis 99-FH, including one related to the radiator. | 18th Nov 1929 | Box 18 \ 3 Scan007 | |
| Follow-up request for a reply regarding when a car is wanted and for how long. | 25th Nov 1929 | Box 18 \ 3 Scan008 | |
| Arranging for a car to be sent via a driver for approximately one week's work and its collection. | 26th Nov 1929 | Box 18 \ 3 Scan009 | |
| Poor condition of demonstration chassis 21-MX, detailing its faults and necessary actions. | 29th Nov 1929 | Box 18 \ 3 Scan010 | |
| Memo inquiring about the completion of a job in order to arrange an appointment. | 6th Dec 1929 | Box 18 \ 3 Scan011 | |
| Communication to Mr. Strong advising of a delay in car delivery due to difficulties with the anti-corrosion treatment for the cylinder block. | 7th Dec 1929 | Box 18 \ 3 Scan012 | |
| Squeaking springs on a Phantom II Trials car due to improper greasing at the works. | 7th Dec 1929 | Box 18 \ 3 Scan013 | |
| Unsatisfactory features on car 21-EX and the proposal to keep it for modifications to the crankshaft, steering and suspension. | 9th Dec 1929 | Box 18 \ 3 Scan014 | |
| Dissatisfaction with features on a car and the need to send it to Spain. | 10th Dec 1929 | Box 18 \ 3 Scan015 | |
| Complaint regarding the unexpected extended time a car was kept at the works for radiator trials. | 11th Dec 1929 | Box 18 \ 3 Scan016 | |
| Expiring temporary admission permit for a front axle and wheels for chassis 21-EX sent to France. | 11th Dec 1929 | Box 18 \ 3 Scan017 | |
| The dispatch of a front axle and wheels to the Experimental Dept., Derby. | 16th Dec 1929 | Box 18 \ 3 Scan018 | |
| Correspondence regarding the shipment of a front axle and two wheels for Chassis 21-EX from Paris to Derby. | 16th Dec 1929 | Box 18 \ 3 Scan019 | |
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