| Description | Date | Identifier | |
| Rear window design compromises and high pricing from coachbuilders for a Goshawk model. | 28th Apr 1923 | Box 41 \ 3 Scan308 | |
| Questioning the design of a Goshawk Saloon Body, particularly Mr. Royce's idea for a two-door configuration. | 28th Apr 1923 | Box 41 \ 3 Scan309 | |
| Correspondence regarding a Beatonson body for chassis 5-G-11. | 30th Apr 1923 | Box 41 \ 3 Scan310 | |
| Suitability of the Goshawk Saloon Body for the 20 HP chassis. | 30th Apr 1923 | Box 41 \ 3 Scan311 | |
| Merits and difficulties of a Maythorn Saloon two-door body. | 30th Apr 1923 | Box 41 \ 3 Scan312 | |
| Instruction to Messrs. Holmes to carry out work on the 2-Goshawk-11 car. | 30th Apr 1923 | Box 41 \ 3 Scan313 | |
| Instruction to Messrs. Holmes Ltd. to carry out work on a 7-GOSHAWK-11 car based on an attached estimate. | 30th Apr 1923 | Box 41 \ 3 Scan314 | |
| Letter from F.H. Royce discussing the suitability of the 20 HP chassis for heavy coachwork and the 'Goshawk' model. | 2nd May 1923 | Box 41 \ 3 Scan315 | |
| Mr. Royce's distress over a car body and instructing it be confined to testing or broken up. | 1st May 1923 | Box 41 \ 3 Scan316 | |
| Requesting experimental pieces be fitted to Goshawk cars, and commenting on the weight of the Maythorn Saloon. | 5th May 1923 | Box 41 \ 3 Scan317 | |
| Scheme with mathematical formulas for determining the center of gravity of a vehicle by tilting it. | 1st Jan 1930 | Box 41 \ 3 Scan318 | |
| Physics-based analysis for calculating displacement and the center of gravity of a vehicle on an incline. | 23th May 1923 | Box 41 \ 3 Scan319 | |
| The replacement of an out-of-date body on a 20 HP chassis for an experimental car. | 23th May 1923 | Box 41 \ 3 Scan320 | |
| Letter discussing the replacement of a Beatonson body on a 20 HP car with an improved 4-door design. | 17th May 1923 | Box 41 \ 3 Scan321 | |
| Letter discussing the replacement of a Beatonson body on a 20 HP chassis with an improved 4-door design. | 17th May 1923 | Box 41 \ 3 Scan322 | |
| Requested body changes and technical improvements for a Goshawk car. | 24th May 1923 | Box 41 \ 3 Scan323 | |
| Proposal to commission Messrs. Young of Bromley to construct a body for a 20 HP chassis, as recommended by Messrs. Beatonson. | 25th May 1923 | Box 41 \ 3 Scan324 | |
| Need to acquire a 4-Goshawk-11 car to use its engine for another vehicle to satisfy Mr. Royce. | 28th May 1923 | Box 41 \ 3 Scan325 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on a 6-Goshawk-11 car based on an attached estimate. | 31th May 1923 | Box 41 \ 3 Scan326 | |
| Design of the body for a Beatonson All-Weather car, coordinating with coachbuilders G.Beaton & Son Ltd and Young of Bromley. | 1st Jun 1923 | Box 41 \ 3 Scan327 | |
| Construction of an experimental Beatonson body for a Goshawk II, listing distributed prints. | 4th Jun 1923 | Box 41 \ 3 Scan328 | |
| Comparative analysis of the stability of a Maythorn Saloon body versus a standard Hooper Limousine on a 20 HP chassis. | 13th Jun 1923 | Box 41 \ 3 Scan329 | |
| Tests and methodology to determine the position of the centre of gravity for various car types. | 31th May 1923 | Box 41 \ 3 Scan330 | |
| Experimental procedures for vehicle suspension and weight analysis on Goshawk models. | 31th May 1923 | Box 41 \ 3 Scan331 | |
| Table detailing the Centre of Gravity and weight specifications for various Goshawk-II car models. | 5th Jun 1923 | Box 41 \ 3 Scan332 | |
| Estimation of the weight of body car roofs for Saloon and Limousine models. | 5th Jun 1923 | Box 41 \ 3 Scan333 | |
| Comparison table detailing the specifications and weights of car roofs for Saloon and Limousine models. | 12th Jun 1923 | Box 41 \ 3 Scan334 | |
| Weight comparison and analysis between the 3-Goshawk-11 and 7-Goshawk-11 models. | 12th Jun 1923 | Box 41 \ 3 Scan335 | |
| Calculation of the theoretical cornering speeds for a touring car and a bodied car before turning over. | 21th Jun 1923 | Box 41 \ 3 Scan336 | |
| Design feedback from Mr. Royce on a Beatonson all-weather body, including tool storage and screen design. | 21th Jun 1923 | Box 41 \ 3 Scan337 | |
| Finalising details and starting construction on a 20 HP All Weather Car. | 28th Jun 1923 | Box 41 \ 3 Scan338 | |
| Letter confirming modifications and specifications for an All-Weather Saloon car body. | 28th Jun 1923 | Box 41 \ 3 Scan339 | |
| Letter detailing bodywork modifications for the rear pillar and the scuttle/dash separation, referencing attached sketches. | 28th Jun 1923 | Box 41 \ 3 Scan340 | |
| Specification for an all-weather Saloon Cabriolet coachwork to be fitted to chassis no. 5.G.11. | 28th Jun 1923 | Box 41 \ 3 Scan341 | |
| List of specifications for motor car bodywork, detailing requirements for painting, upholstery, flooring, and various fittings. | 28th Jun 1923 | Box 41 \ 3 Scan342 | |
| Specification sheet detailing vehicle dimensions, materials, road testing, and delivery requirements. | 1st Jul 1923 | Box 41 \ 3 Scan343 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on a Goshawk-11 project as per their estimate. | 1st Jul 1923 | Box 41 \ 3 Scan344 | |
| The modernization of a 5-Goshawk-11 car before it is sent to the Coachbuilders. | 2nd Jul 1923 | Box 41 \ 3 Scan345 | |
| The design progress of Goshawk side levers for B and D type steering. | 6th Jul 1923 | Box 41 \ 3 Scan346 | |
| Brief typed memorandum or the second page of a letter. | 6th Jul 1923 | Box 41 \ 3 Scan347 | |
| The Goshawk model's side levers and the impact on seating accommodation and driver leg room. | 6th Jul 1923 | Box 41 \ 3 Scan348 | |
| Instruction for Messrs. Sanderson & Holmes, Ltd. to carry out work on chassis No. 5-G-11. | 14th Jul 1923 | Box 41 \ 3 Scan349 | |
| The assessment of two Goshawk cars following complaints of poor engine vigour and coarseness. | 16th Jul 1923 | Box 41 \ 3 Scan350 | |
| Performance difference between the 22 HP and 48 HP chassis. | 18th Jul 1923 | Box 41 \ 3 Scan351 | |
| Instruction to Messrs. Sanderson & Holmes to carry out work on a 4-Goshawk-11 per an attached estimate. | 18th Jul 1923 | Box 41 \ 3 Scan352 | |
| Internal order to instruct Messrs. Sanderson & Holmes Ltd. to carry out work on Chassis No. 7-Goshawk-11. | 24th Jul 1923 | Box 41 \ 3 Scan353 | |
| The delayed delivery of chassis 5-G-11 and the consequent time extension for the coachbuilders. | 20th Jul 1923 | Box 41 \ 3 Scan354 | |
| Dispatch notification for a 5-Goshawk-11 chassis to be fitted with a Beatonson 4-door body. | 7th Jul 1923 | Box 41 \ 3 Scan355 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on a Goshawk-11. | 10th Aug 1923 | Box 41 \ 3 Scan356 | |
| Internal office order instructing work to be carried out by Messrs. Sanderson and Holmes Ltd. on Coshawk 79-AO. | 1st Aug 1923 | Box 41 \ 3 Scan357 | |
| Internal order to instruct Sanderson & Holmes Ltd. to carry out work on a 7-Goshawk-11. | 14th Aug 1923 | Box 41 \ 3 Scan358 | |
| Internal order instructing work to be carried out by Sanderson & Holmes Ltd. on a 4-Goshawk-ll. | 14th Aug 1923 | Box 41 \ 3 Scan359 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on a Goshawk-II car as per the attached estimate. | 20th Aug 1923 | Box 41 \ 3 Scan360 | |
| Instruction for Messrs. Sanderson & Holmes, Ltd. to carry out work in connection with a 4-Goshawk-11. | 25th Aug 1923 | Box 41 \ 3 Scan361 | |
| Chassis frame deflections on the 20 HP model and proposed experiments for reinforcement. | 28th Aug 1923 | Box 41 \ 3 Scan362 | |
| Order to Sanderson & Holmes Ltd. to carry out work on a 6-Goshawk-11 as per an attached estimate. | 29th Aug 1923 | Box 41 \ 3 Scan363 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on the 4-Goshawk-ll car. | 3rd Sep 1923 | Box 41 \ 3 Scan364 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on the 6-Goshawk-II car. | 1st Sep 1923 | Box 41 \ 3 Scan365 | |
| Inspection report on a 20 HP Beaton All Weather chassis X.3730, listing parts required. | 3rd Sep 1923 | Box 41 \ 3 Scan366 | |
| Requesting the urgent despatch of a revised luggage carrier to coachbuilders for fitting. | 12th Sep 1923 | Box 41 \ 3 Scan367 | |
| Instruction to Messrs. Sunderson & Holmes Ltd. to carry out work on chassis 36-HG. | 12th Sep 1923 | Box 41 \ 3 Scan368 | |
| Requirement for two rear wing stays and fittings for a 5-GOSHAWK-11 car. | 14th Sep 1923 | Box 41 \ 3 Scan369 | |
| Letter to G. Beaton & Son regarding the finishing, instrument layout, and luggage carrier for a 20.HP All-Weather car. | 21th Sep 1923 | Box 41 \ 3 Scan370 | |
| Letter discussing coordination of chassis alterations with a coachbuilder before painting. | 26th Jul 1932 | Box 41 \ 3 Scan371 | |
| Instruction to authorise Messrs. Sanderson & Holmes Ltd. to carry out work on a 3-Goshawk-ll chassis. | 28th Sep 1923 | Box 41 \ 3 Scan372 | |
| Proposal for a suggested sheet metal body stiffener for a 20 HP vehicle. | 29th Sep 1923 | Box 41 \ 3 Scan373 | |
| Frame deflection and body mounting issues on the 20 HP Goshawk II chassis, proposing a new design. | 29th Sep 1923 | Box 41 \ 3 Scan374 | |
| Technical memorandum discussing car body stiffness, engine vibration isolation, and proposals for future experiments on a cabriolet. | 1st Oct 1923 | Box 41 \ 3 Scan375 | |
| Instruction to arrange for Messrs. Sanderson & Holmes Ltd. to carry out work on job 4-C-11 per an attached estimate. | 1st Oct 1923 | Box 41 \ 3 Scan376 | |
| Outlining requirements for car bodies for 10,000-mile production chassis tests. | 2nd Oct 1925 | Box 41 \ 3 Scan377 | |
| Body requirements for 10,000-mile chassis tests for 20 HP and 40/50 HP models. | 4th Oct 1923 | Box 41 \ 3 Scan378 | |
| Letter to coachbuilders G. Beaton & Son regarding the final finishing and road test of a 20.HP. All-Weather car. | 5th Oct 1923 | Box 41 \ 3 Scan379 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on the 6-Goshawk-11 car. | 8th Oct 1923 | Box 41 \ 3 Scan380 | |
| Defects found in Goshawk body brackets during tests for body rattles and frame stiffness, and proposing a revised design. | 12th Oct 1923 | Box 41 \ 3 Scan381 | |
| Proposed improvements to prevent frame twisting and improve body rigidity, referencing the 40/50 model. | 12th Oct 1923 | Box 41 \ 3 Scan382 | |
| Size of Goshawk cross members and a proposal for their increase. | 18th Oct 1923 | Box 41 \ 3 Scan383 | |
| Fitting tie-bars and a change to the spare wheel centre for an Allweather chassis. | 18th Oct 1923 | Box 41 \ 3 Scan384 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on a chassis as per an attached estimate. | 8th Oct 1923 | Box 41 \ 3 Scan385 | |
| Proposing a standardisation process for experiments on body parts concerned with the chassis. | 19th Oct 1923 | Box 41 \ 3 Scan386 | |
| Improvements to the Goshawk 11 body brackets and the addition of an extra cross member. | 22th Oct 1923 | Box 41 \ 3 Scan387 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on the 10,000 miles, 20 HP test car chassis. | 31th Oct 1923 | Box 41 \ 3 Scan388 | |
| Revised scheme for 20 HP body stiffeners, including modifications to supports and brackets. | 31th Oct 1923 | Box 41 \ 3 Scan389 | |
| Letter to coachbuilders requesting notification for when Mr. Royce's 20 HP car is ready for testing. | 16th Nov 1923 | Box 41 \ 3 Scan390 | |
| Updates and modifications made to a 5-Goshawk-II chassis before its return to Messrs. Young. | 27th Oct 1923 | Box 41 \ 3 Scan391 | |
| Letter from coachbuilders James Young & Co. Ltd. regarding arrangements for testing a 20 HP car. | 17th Nov 1923 | Box 41 \ 3 Scan392 | |
| Letter to James Young & Co. Coachbuilders arranging a test for Mr. Royce's 20 HP car. | 19th Nov 1923 | Box 41 \ 3 Scan393 | |
| Modifications for a 20 HP All-Weather car before its shipment to France. | 6th Dec 1923 | Box 41 \ 3 Scan394 | |
| Modifications to the 20 HP body underframe suspension and dashboard. | 1st Dec 1923 | Box 41 \ 3 Scan395 | |
| Telegram requesting a specialist to wire an instrument board for Goshawk engines. | 8th Dec 1933 | Box 41 \ 3 Scan396 | |
| Negative consequences of increasing car body weight on performance and reliability. | 1st Jan 1924 | Box 41 \ 3 Scan397 | |
| Effects of adding weight to the Goshawk chassis and proposing a 10,000-mile road test. | 11th Jan 1924 | Box 41 \ 3 Scan398 | |
| Authorising work to be carried out on chassis 4-G-11 by Messrs. Sanderson and Holmes. | 29th Jan 1924 | Box 41 \ 3 Scan399 | |
| Instruction to arrange for Messrs. Sanderson & Holmes to carry out work in connection with 7.G-11. | 1st Jan 1924 | Box 41 \ 3 Scan400 | |
| Extract from a sales visit report concerning the build of a landaulette body at Barkers coachbuilders. | 12th Feb 1924 | Box 41 \ 3 Scan401 | |
| Instructions for the experimental Goshawk 11 body suspension, relating to the rear step iron and runningboard. | 7th Mar 1924 | Box 41 \ 3 Scan402 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on the Goshawk trials car based on an attached estimate. | 12th Mar 1924 | Box 41 \ 3 Scan403 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on car 4-G-11. | 18th Mar 1924 | Box 41 \ 3 Scan404 | |
| Query about the despatch of experimental chassis GF-68 with special body frame suspension to Barkers Works. | 18th Mar 1924 | Box 41 \ 3 Scan405 | |
| Order instructing Messrs. Sanderson & Holmes Ltd. to carry out work on Goshawk Chassis 6-G-11. | 19th Mar 1924 | Box 41 \ 3 Scan406 | |
| The despatch of experimental chassis GF-68 to Messrs. Barkers Works. | 19th Mar 1924 | Box 41 \ 3 Scan407 | |
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