| Description | Date | Identifier | |
| Instruction memo for Messrs. Sanderson & Holmes Ltd. to carry out work on a car as per an attached estimate. | 12th Apr 1929 | Box 5 \ 2 02-page244 | |
| Instructing Sanderson & Holmes Ltd. to carry out work on a car as per an attached estimate. | 17th Apr 1929 | Box 5 \ 2 02-page245 | |
| Insufficient axle and body damping, and steering issues on a 20 HP model. | 1st Apr 1929 | Box 5 \ 2 02-page246 | |
| Steering wobble, road tests, and the performance of a new 20 HP front axle. | 15th Apr 1929 | Box 5 \ 2 02-page247 | |
| Letter to Barker & Co. Ltd. requesting the earliest possible delivery date for a car body intended for Mr. Royce's personal use. | 15th Apr 1929 | Box 5 \ 2 02-page248 | |
| Secret memorandum on future 20 HP model improvements, focusing on weight reduction, body construction, and performance enhancements. | 16th Apr 1929 | Box 5 \ 2 02-page249 | |
| Instruction for Messrs. Sanderson & Holmes Ltd. to carry out work on a car based on an attached estimate. | 18th Apr 1929 | Box 5 \ 2 02-page250 | |
| Letter to Messrs. Barker & Co. Ltd. confirming the dispatch of a Bonnet and five Road Wheels for a car. | 18th Apr 1929 | Box 5 \ 2 02-page251 | |
| Increasing the horsepower and improving the performance of the 20 HP model. | 22th Apr 1929 | Box 5 \ 2 02-page252 | |
| List of hoped-for improvements regarding chassis length, engine performance, cylinder bore, and gear ratios. | 21th Apr 1928 | Box 5 \ 2 02-page253 | |
| The 20 HP Chassis, addressing suggestions, body quality, and weight limitations. | 21th Apr 1928 | Box 5 \ 2 02-page254 | |
| Clarifying points on body weight limitations and other specific design features for a chassis. | 15th May 1938 | Box 5 \ 2 02-page255 | |
| The disposal of a heavy Hooper Saloon body from an experimental car. | 1st Apr 1929 | Box 5 \ 2 02-page256 | |
| Letter from Barker & Co. Coachbuilders confirming receipt of parts for chassis LG-G4. | 23th Apr 1929 | Box 5 \ 2 02-page257 | |
| The arrangement of a Park Ward Weymann Saloon body for chassis OTM.22. | 29th Apr 1929 | Box 5 \ 2 02-page258 | |
| Delay in making an instrument board for a Barker Close Coupled Allweather vehicle due to missing instruments. | 29th Apr 1929 | Box 5 \ 2 02-page259 | |
| Letter confirming collection details for a Weymann Saloon body and arrangements for various parts including lamps and a horn. | 30th Apr 1929 | Box 5 \ 2 02-page260 | |
| Letter from coachbuilder Barker & Co. regarding fittings for experimental job 16 G 4. | 3rd May 1929 | Box 5 \ 2 02-page261 | |
| Miscommunication with Mr. Park over the collection of a modified Weymann body. | 6th May 1929 | Box 5 \ 2 02-page262 | |
| Letter to Barker & Co. Ltd. regarding the collection and specifications for a 'Close Coupled All-Weather' car body for Mr. Royce. | 6th May 1929 | Box 5 \ 2 02-page263 | |
| 'Close Coupled All Weather' body being ready for collection from Barker's. | 8th May 1929 | Box 5 \ 2 02-page264 | |
| Letter to coachbuilder Barker & Co. Ltd. arranging for the collection of front wings and platform step materials for body 16-G-IV. | 9th May 1929 | Box 5 \ 2 02-page265 | |
| Secret memo from DA to HS about fitting a larger front cross member to a 20HP 17-G-4 Close Coupled Coupe for Mr. Royce. | 9th May 1929 | Box 5 \ 2 02-page266 | |
| Letter from coachbuilders Barker & Co. concerning the collection of parts for an experimental body on chassis 16 G 4. | 10th May 1929 | Box 5 \ 2 02-page267 | |
| Authorising Sanderson & Holmes Ltd. to carry out work on car 14-G4 per an attached estimate. | 11th May 1929 | Box 5 \ 2 02-page268 | |
| Separate estimates for different car models from Messrs. Sanderson & Holmes. | 13th May 1929 | Box 5 \ 2 02-page269 | |
| Internal instruction to authorise work on a car by Sanderson & Holmes Ltd. based on an attached estimate. | 13th May 1929 | Box 5 \ 2 02-page270 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on three cars as per an attached estimate. | 16th May 1929 | Box 5 \ 2 02-page271 | |
| Telegram received by telephone regarding the collection of car body 16 GH. | 23th May 1929 | Box 5 \ 2 02-page272 | |
| Delay with coachbuilder Barker & Co for Mr. Royce's Close Coupled Coupe and potential engine modifications. | 23th May 1929 | Box 5 \ 2 02-page273 | |
| Unbearable faults, specifically radiator vibration and heavy pistons, in a 20 HP Close Coupled Saloon. | 23th May 1929 | Box 5 \ 2 02-page274 | |
| Technical memorandum discussing improvements to a 'Japan' car, including the radiator, pistons, crankchamber, and flywheel to resolve vibration issues. | 29th May 1929 | Box 5 \ 2 02-page275 | |
| 20 HP Cabriolet De Ville with a Blue Hooper Body, detailing performance and bodywork issues. | 29th May 1929 | Box 5 \ 2 02-page276 | |
| Sale and body fitting for the late experimental chassis 10.G.3. | 5th Jun 1929 | Box 5 \ 2 02-page277 | |
| Secret internal memorandum detailing the initial impressions and performance of a 20 HP Allweather car. | 26th Jun 1929 | Box 5 \ 2 02-page278 | |
| Alteration to the filler position and dimensions on the 20 HP chassis. | 4th Sep 1929 | Box 5 \ 2 02-page279 | |
| Comparative tests of the maximum speed and acceleration between small and large bore 20 HP chassis. | 24th Sep 1929 | Box 5 \ 2 02-page280 | |
| Comparison of acceleration times between large and small bore chassis. | 1st Oct 1929 | Box 5 \ 2 02-page281 | |
| Internal instruction to arrange for work on car 16-G-4 by Sanderson & Holmes Ltd. | 1st Oct 1929 | Box 5 \ 2 02-page282 | |
| Concerns over the 20HP model, including inappropriate body fittings and engine performance issues. | 3rd Oct 1929 | Box 5 \ 2 02-page283 | |
| Negative impact of fitting large bodies, such as 6-seaters, onto the 'Twenties' chassis. | 17th Oct 1929 | Box 5 \ 2 02-page284 | |
| Confidential memo discussing the declining sales of the 20 HP chassis and proposing potential improvements or discontinuation. | 17th Oct 1929 | Box 5 \ 2 02-page285 | |
| Page two of a memo regarding the adoption of improvements to parts under the bonnet. | 30th Oct 1929 | Box 5 \ 2 02-page286 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on car 12-G4 as per an attached estimate. | 30th Oct 1929 | Box 5 \ 2 02-page287 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on car 14-G4 as per an attached estimate. | 30th Oct 1939 | Box 5 \ 2 02-page288 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on car 12-G4 as per an attached estimate. | 1st Oct 1929 | Box 5 \ 2 02-page289 | |
| Authorising Sanderson & Holmes Ltd. to carry out work on car 17-04. | 30th Oct 1929 | Box 5 \ 2 02-page290 | |
| Instructing work to be carried out on car 16-G4 by Messrs. Sanderson & Holmes Ltd. | 1st Oct 1929 | Box 5 \ 2 02-page291 | |
| Design of a 20-25 model Open Touring Car for the 1930 Riviera season. | 11th Nov 1929 | Box 5 \ 2 02-page292 | |
| Replacement body for an experimental enclosed limousine on a 20-25 HP long chassis. | 11th Nov 1929 | Box 5 \ 2 02-page293 | |
| Specification of coachwork for an enclosed drive limousine. | 11th Nov 1929 | Box 5 \ 2 02-page294 | |
| Specification sheet detailing the construction, materials, and finishing for a vehicle's bodywork. | 11th Nov 1929 | Box 5 \ 2 02-page295 | |
| The body for a 20 HP long chassis, proposing to change the side members to keep the car up-to-date. | 14th Nov 1929 | Box 5 \ 2 02-page296 | |
| Letter to Park Ward & Co. commissioning an experimental enclosed limousine for Mr. Royce. | 19th Nov 1929 | Box 5 \ 2 02-page297 | |
| Page 2 of a letter detailing technical schemes for a car body, including radiator, scuttle, floor, and seating arrangements. | 19th Nov 1929 | Box 5 \ 2 02-page298 | |
| Letter regarding a subframe similar to the Phantom II, noting the work's confidential nature and that Mr. Royce will personally use the car. | 26th Nov 1929 | Box 5 \ 2 02-page299 | |
| Lubrication system for the joints on a 20/25 HP experimental long chassis car. | 26th Nov 1929 | Box 5 \ 2 02-page300 | |
| Up-to-date recommendations for coachbuilders and investigating specific chassis issues. | 2nd Nov 1929 | Box 5 \ 2 02-page301 | |
| Instructing Messrs. Sanderson & Holmes to carry out work on a 17-G4 Saloon car. | 4th Dec 1929 | Box 5 \ 2 02-page302 | |
| Confirming the dispatch of a new 20 HP subframe to Messrs. Park Ward's. | 9th Dec 1923 | Box 5 \ 2 02-page303 | |
| The body construction of a 20/25HP Experimental Limousine by Park Ward & Co. | 17th Dec 1929 | Box 5 \ 2 02-page304 | |
| Instruction to Messrs. Sanderson & Holmes Ltd. to carry out work on chassis number 12-Gr. | 11th Jan 1930 | Box 5 \ 2 02-page305 | |
| Instruction authorising Sanderson & Holmes Ltd. to carry out work on chassis number 14-G4 as per an attached estimate. | 11th Jan 1930 | Box 5 \ 2 02-page306 | |
| Letter to coachbuilder Barker & Co. Ltd. detailing defects on a 20HP car and requesting modifications. | 30th Jan 1930 | Box 5 \ 2 02-page307 | |
| List of identified vehicle faults and requested modifications, page 2. | 30th Jan 1930 | Box 5 \ 2 02-page308 | |
| Page 3 of a letter regarding arrangements for the loan of an experimental car and the need to keep it confidential. | 27th Feb 1930 | Box 5 \ 2 02-page309 | |
| Modifications to a 20 HP model's dashboard and radiator due to sales department disapproval of the bonnet curves. | 27th Feb 1930 | Box 5 \ 2 02-page310 | |
| Design improvements to the dashboard, bonnet, and radiator for the 20/25 HP chassis. | 27th Feb 1930 | Box 5 \ 2 02-page311 | |
| Build progress, required parts, and colour scheme for an Experimental Pullman Limousine. | 27th Feb 1930 | Box 5 \ 2 02-page312 | |
| Final specifications for a car's interior, including upholstery, colour, and instrument panel. | 28th Feb 1930 | Box 5 \ 2 02-page313 | |
| Car body delays, instrument specifications, colour choices and upholstery. | 28th Feb 1930 | Box 5 \ 2 02-page314 | |
| Choice of paint colour for the 20 HP Experimental Pullman Limousine. | 1st Mar 1930 | Box 5 \ 2 02-page315 | |
| Instruction to arrange for Messrs. Sanderson & Holmes to carry out work on a car as per an attached estimate. | 4th Mar 1930 | Box 5 \ 2 02-page316 | |
| Instruction to Messrs. Sanderson & Holmes to carry out work on Chassis 14-W as per an attached estimate. | 4th Mar 1930 | Box 5 \ 2 02-page317 | |
| Instructions for the paintwork and upholstery of a 20/25 Experimental Pullman Limousine. | 6th Mar 1930 | Box 5 \ 2 02-page318 | |
| Instructions for Park Ward & Co. to complete the bodywork on a 20/25 Experimental Pullman Limousine. | 13th Mar 1930 | Box 5 \ 2 02-page319 | |
| Alterations to the driving seat angle and rattles on a 20 HP car. | 28th Mar 1930 | Box 5 \ 2 02-page320 | |
| Coachwork issues including body rattles, chassis frame flexing, and seat adjustments. | 1st Apr 1930 | Box 5 \ 2 02-page321 | |
| Design of a four-door close-coupled saloon on a 20/25 HP short-frame chassis. | 1st Apr 1930 | Box 5 \ 2 02-page322 | |
| Faults with the 20 HP car's front wings and lamps, and a performance comparison with the 14-G4 model. | 5th Apr 1929 | Box 5 \ 2 02-page323 | |
| The readiness of a car body and the schedule for sending the chassis to coachbuilders. | 25th Apr 1930 | Box 5 \ 2 02-page324 | |
| The revised scuttle isolation and dashboard modifications for a 20/25 HP model. | 26th Apr 1930 | Box 5 \ 2 02-page325 | |
| Solutions for radiator jelly, flexible mounting, and body mounting issues. | 1st May 1930 | Box 5 \ 2 02-page326 | |
| Methods for insulating a vehicle's body and passengers from road vibrations. | 25th May 1938 | Box 5 \ 2 02-page327 | |
| Reasons for stagnating sales of the 20/25 car model, addressing issues of body size, power, and price. | 13th May 1930 | Box 5 \ 2 02-page328 | |
| Necessary improvements for the 20/25 model, including radiator mounting, thermostatically controlled shutters, and lubrication. | 13th May 1930 | Box 5 \ 2 02-page329 | |
| Arrangements for collecting a 20/25 Enc. Limousine body from coachbuilder Park Ward & Co. | 14th May 1930 | Box 5 \ 2 02-page330 | |
| Arrangements for delivering a body from a 20/25 HP chassis to Park Wards for repairs and collecting a new body. | 15th May 1930 | Box 5 \ 2 02-page331 | |
| Correspondence regarding the collection of a 20/25 M.C. Limousine body by Park Ward & Co. | 16th May 1930 | Box 5 \ 2 02-page332 | |
| Letter from coachbuilders Park Ward & Co. Ltd concerning a glass ashtray and chromium-plated scuttle mouldings for a car. | 20th May 1930 | Box 5 \ 2 02-page333 | |
| Letter to Messrs. Park Ward & Co. Ltd. acknowledging the safe receipt of a glass ash tray and other fittings for Mr. Royce's car. | 23th May 1930 | Box 5 \ 2 02-page334 | |
| Issues with body mounting, including coachbuilder work, clearances, and fittings. | 21th May 1930 | Box 5 \ 2 02-page335 | |
| Chassis and body interactions, focusing on noise, vibration, and booming issues. | 21th May 1930 | Box 5 \ 2 02-page336 | |
| Instruction to Messrs. Sanderson & Holmes to carry out work on Chassis No. 17-G4. | 24th Jun 1930 | Box 5 \ 2 02-page337 | |
| Instruction to Messrs. Sanderson & Holmes to carry out work on chassis 17-G4 as per an attached estimate. | 24th Jun 1930 | Box 5 \ 2 02-page338 | |
| Instruction to Messrs. Sanderson & Holmes to carry out work on Chassis 17-G4. | 24th Dec 1930 | Box 5 \ 2 02-page339 | |
| Instruction memo to Messrs. Sanderson & Holmes to carry out work on chassis no. 17-G4. | 24th Jun 1930 | Box 5 \ 2 02-page340 | |
| Instruction to Messrs. Sanderson & Holmes to carry out work on Chassis No. 16-G4 per an attached estimate. | 24th Jun 1930 | Box 5 \ 2 02-page341 | |
| Instruction for Messrs. Sanderson & Holmes to carry out work on chassis No. 16-G4. | 24th Jun 1930 | Box 5 \ 2 02-page342 | |
| Instruction for Messrs. Sanderson & Holmes to carry out work on chassis 14-G4 as per an attached estimate. | 27th Jun 1930 | Box 5 \ 2 02-page343 | |
| | | | |
