| Description | Date | Identifier | |
| Letter from the National Advisory Committee for Aeronautics arranging a factory visit in England. | 5th May 1937 | Box 174 \ 2 img128 | |
| Letter from J.S. Inskip, Inc. to Mr. W.A. Robotham regarding a chassis delivery and body construction for the 'Gray matter' order. | 5th May 1937 | Box 174 \ 2 img129 | |
| Letter to Briggs Motor Bodies Ltd. proposing a meeting to discuss future production of steel bodies. | 5th May 1937 | Box 174 \ 2 img130 | |
| Letter to H. Adkins discussing Phantom III clutch mileage, delivery of Packard and Lincoln parts, and interest in the Dodge engine. | 6th May 1937 | Box 174 \ 2 img131 | |
| Letter discussing mileage for bearing replacement due to oil consumption, compared to a Chevrolet. | 6th May 1937 | Box 174 \ 2 img132 | |
| Letter to The Zenith Carburetter Co. regarding the dispatch and arrival of carburetters for testing on a 25/30 model. | 6th May 1937 | Box 174 \ 2 img133 | |
| Letter to The Harrison Radiator Co. following up on a radiator delivery and placing an order for Chevrolet and Buick radiators. | 6th May 1937 | Box 174 \ 2 img134 | |
| Letter to Ben Hopkins of The Cleveland Graphite Bronze Co. regarding strip bearing tests and big end loading. | 6th May 1937 | Box 174 \ 2 img135 | |
| Letter to the Delco Shock Absorber Company regarding an order for 8 shock absorbers. | 6th May 1937 | Box 174 \ 2 img136 | |
| Follow-up letter to A.C. Sphinx Sparking Plug Co. regarding a requested sample pump for testing. | 6th May 1937 | Box 174 \ 2 img137 | |
| Clutch plate issues on car 3-AZ-194 in America, and a recommendation for future action. | 6th May 1937 | Box 174 \ 2 img138 | |
| Letter regarding the excellent condition of the clutch in the Propaganda Car after covering 3,500 miles. | 26th Apr 1937 | Box 174 \ 2 img139 | |
| Letter from Briggs Motor Bodies Limited arranging a meeting to discuss improving the production and price of steel bodies. | 7th May 1937 | Box 174 \ 2 img140 | |
| Letter from Zenith Carburetter Co Ltd requesting an official order for two carburetters shipped by Bendix. | 7th May 1937 | Box 174 \ 2 img141 | |
| Letter from The Zenith Carburetter Co Ltd regarding a Bendix Products Corporation drawing for a 45mm dual downdraught carburetter. | 7th May 1937 | Box 174 \ 2 img142 | |
| Itemized list of travelling expenses incurred in the U.S.A. | 7th May 1937 | Box 174 \ 2 img143 | |
| Continued list of travelling expenses and costs for obtaining driving licences. | 7th May 1937 | Box 174 \ 2 img144 | |
| List of parts purchased in the U.S.A. with their costs in dollars. | 7th May 1937 | Box 174 \ 2 img145 | |
| Itemized list of expenses for cables, postage, stationery, and long-distance phone calls. | 7th May 1937 | Box 174 \ 2 img146 | |
| Itemized list of entertaining expenses from February to April. | 7th May 1937 | Box 174 \ 2 img147 | |
| Breakdown of living allowance expenses over several months. | 8th May 1937 | Box 174 \ 2 img148 | |
| Letter of credit detailing currency conversions from pounds sterling to US dollars for transactions in New York and Detroit. | 8th May 1937 | Box 174 \ 2 img149 | |
| Summary of total expenses incurred, including travel, parts, allowances and currency conversion calculations. | 8th May 1937 | Box 174 \ 2 img150 | |
| Letter from Zenith Carburetter Co Ltd regarding the dispatch and customs clearance for two carburettors. | 8th May 1937 | Box 174 \ 2 img151 | |
| Urgent telex to New York requesting information on the behaviour of a car's clutch during long trials. | 10th May 1937 | Box 174 \ 2 img152 | |
| Letter of appreciation for R.C. Vaughan Lewis's trip to America. | 5th May 1937 | Box 174 \ 2 img153 | |
| Telegram received by telephone regarding a mileage book and factory instructions. | 11th Feb 1931 | Box 174 \ 2 img154 | |
| Telegram received by telephone from New York concerning clutch mileage. | 11th Mar 1937 | Box 174 \ 2 img155 | |
| Letter from the US retailer to Derby regarding clutch performance in a trials car and a customer's vehicle. | 11th May 1937 | Box 174 \ 2 img156 | |
| Letter regarding sending a P-III trials car to Boston for promotional work. | 11th May 1937 | Box 174 \ 2 img157 | |
| Letter from J.S. Inskip, Inc. to W.A. Robotham regarding an outstanding indebtedness and its settlement. | 13th May 1937 | Box 174 \ 2 img158 | |
| Invoice from the Detroit Athletic Club for Mr. W. A. Robotham's April house account. | 12th May 1937 | Box 174 \ 2 img159 | |
| Casting difficulties for cylinder blocks and heads, and the importance of testing a US iron composition. | 14th May 1937 | Box 174 \ 2 img160 | |
| Cablegram from New York regarding satisfactory clutch trial mileage. | 14th Jun 1937 | Box 174 \ 2 img161 | |
| Letter from Bendix Products Corporation regarding the layout of a large dual carburetor. | 19th May 1937 | Box 174 \ 2 img162 | |
| Letter to H.J.E. Reid of the National Advisory Committee for Aeronautics (USA) confirming arrangements for a factory visit. | 22th May 1937 | Box 174 \ 2 img163 | |
| Telegram from Birmal regarding the availability of test pistons. | 8th Aug 1930 | Box 174 \ 2 img164 | |
| Letter to J.S. Inskip in New York regarding a clutch issue on a demonstration car and a future visit. | 24th May 1937 | Box 174 \ 2 img165 | |
| Letter to the Graham-Paige Corporation discussing supercharging, centrifugal blowers, and cadmium nickel bearings. | 24th May 1937 | Box 174 \ 2 img166 | |
| Letter regarding payment of an invoice from the Detroit Athletic Club and passing on another invoice. | 24th May 1937 | Box 174 \ 2 img167 | |
| Cablegram to Inskip, New York, requesting quotations and deliveries for 100 clutch plates and linings. | 25th May 1937 | Box 174 \ 2 img168 | |
| Brief internal cable message instructing contact with 'HIVE'. | 25th May 1937 | Box 174 \ 2 img169 | |
| Letter from Harrison Radiator Division to W. A. Robotham regarding safe arrival and a parts shipment. | 25th May 1937 | Box 174 \ 2 img170 | |
| Letter from Harrison Radiator Division regarding a shipment delay and a misaddressed letter. | 25th May 1937 | Box 174 \ 2 img171 | |
| Letter from a US retailer to Derby regarding clutch and steering problems on P-III demonstrator and customer cars. | 28th May 1937 | Box 174 \ 2 img172 | |
| Dodge engine oil consumption, wear due to dust in western states, and an inquiry about a clutch. | 28th May 1927 | Box 174 \ 2 img173 | |
| Letter to Bendix Products Corporation regarding the manufacturing of the Phantom III carburettor. | 31th May 1937 | Box 174 \ 2 img174 | |
| Weight distribution data for Packard, Vauxhall, and Rover vehicles. | 1st May 1937 | Box 174 \ 2 img175 | |
| Note regarding British Oxygen's Oxweld 25M Welding Rod and Brazd Flux for brazing. | 8th Jun 1937 | Box 174 \ 2 img176 | |
| Request to place a covering order with Eaton Spring Manufacturing Co. for various vehicle springs. | 10th Jun 1937 | Box 174 \ 2 img177 | |
| Table detailing U.S. New Car Registrations and Estimated Dollar Volume by retail price classes for March and the first three months of a year. | 2nd Jun 1937 | Box 174 \ 2 img178 | |
| Letter from US retailer J. S. Inskip, Inc. to Derby regarding a cabled quotation. | 2nd Jun 1937 | Box 174 \ 2 img179 | |
| Letter from an American retailer confirming payment for an outstanding account and discussing upcoming travel plans to England. | 7th Jun 1937 | Box 174 \ 2 img180 | |
| Invoice from J.S. Inskip, Inc. for car parts. | 12th Jun 1937 | Box 174 \ 2 img181 | |
| Request to place an order for parts already received by J.S. Inskip, Inc. in New York City. | 15th Jun 1937 | Box 174 \ 2 img182 | |
| Letter to Miss A. Dreier regarding her proposed visit to Derby in July. | 15th Jun 1937 | Box 174 \ 2 img183 | |
| Cover note for a report on a recent visit to the U.S.A. | 15th Jun 1937 | Box 174 \ 2 img184 | |
| Specification and costing sheet for a LaSalle #5019 4-door 'Toursed' vehicle. | 14th Apr 1937 | Box 174 \ 2 img185 | |
| Letter from the New York Sales Salon to Derby regarding demonstrators, sales, and the American market. | 2nd Jun 1937 | Box 174 \ 2 img186 | |
| Page 2 of a letter discussing advertising, car body design, and customer relations. | 2nd Jun 1937 | Box 174 \ 2 img187 | |
| Letter from H. J. E. Reid of NACA to W. A. Robotham regarding changes to a proposed visit to England. | 11th Jun 1937 | Box 174 \ 2 img188 | |
| Letter to Mr. Reid acknowledging his correspondence and anticipating his arrival in England. | 23th Jun 1937 | Box 174 \ 2 img189 | |
| Letter to Capt. W. Lawrence Hope regarding a photograph taken on board the 'Berengaria' and an invitation to Derby. | 25th Jun 1937 | Box 174 \ 2 img190 | |
| Letter on Grosvenor House, London letterhead regarding travel itineraries and a missed meeting. | 30th Jun 1937 | Box 174 \ 2 img191 | |
| Letter discussing a change of travel plans regarding a visit to the Works and arrangements to board a ship. | 30th Jun 1937 | Box 174 \ 2 img192 | |
| Letter on Grosvenor House headed paper regarding upcoming travel and communication. | 7th Jul 1937 | Box 174 \ 2 img193 | |
| Thank you letter to S. Sparrow of Studebaker Corporation following a visit. | 7th Jul 1937 | Box 174 \ 2 img194 | |
| Letter to the Chief Engineer of Chrysler thanking him for hospitality during a visit to Detroit which was cut short by a strike. | 7th Jul 1937 | Box 174 \ 2 img195 | |
| Thank you letter to Buick's Chief Engineer following a visit, discussing foundry techniques and requesting information on 1938 models. | 7th Jul 1937 | Box 174 \ 2 img196 | |
| Letter to the Chief Engineer of Cadillac Motor Car Company regarding a recent visit to America. | 7th Jul 1937 | Box 174 \ 2 img197 | |
| Letter to Mr. Crawford of Chevrolet following up on a meeting in Detroit. | 7th Jul 1937 | Box 174 \ 2 img198 | |
| Letter confirming payment of an account to the Detroit Athletic Club. | 8th Jul 1937 | Box 174 \ 2 img199 | |
| Letter of complaint to a shipping company regarding passenger booking difficulties and subsequent charges. | 10th Jul 1937 | Box 174 \ 2 img200 | |
| Complaint letter regarding poor cabin allocation and service during a sea voyage. | 10th Jul 1937 | Box 174 \ 2 img201 | |
| Letter from Cunard White Star Limited responding to a complaint about travel arrangements. | 13th Jul 1937 | Box 174 \ 2 img202 | |
| Letter from Chevrolet's Chief Engineer, J. M. Crawford, to Mr. W. A. Robotham. | 29th Jul 1937 | Box 174 \ 2 img203 | |
| Letter from H.D. Woolson of Chrysler Corporation to W.A. Robotham regarding a recent visit. | 29th Jul 1937 | Box 174 \ 2 img204 | |
| Letter from a US retailer regarding P-III overheating, clutch performance, faulty shock absorbers, and oil leaks. | 4th Aug 1937 | Box 174 \ 2 img205 | |
| Letter from a US retailer to Derby regarding an enquiry from their Boston branch about the new 30 HP model. | 13th Aug 1937 | Box 174 \ 2 img206 | |
| Customer's complaint about the ride quality of a 30-HP town car and an inquiry about fitting Knee-action suspension. | 12th Aug 1937 | Box 174 \ 2 img207 | |
| Customer complaint on chassis GXM-69, discussing shock absorber oil levels and the possibility of a knee action system. | 13th Aug 1937 | Box 174 \ 2 img208 | |
| Letter to J.S.Inskip Inc. in New York regarding overheating issues in traffic and proposed solutions. | 17th Aug 1937 | Box 174 \ 2 img209 | |
| Letter discussing issues with dampers, steering modifications, and high-pressure fuel pumps due to heat. | 1st Sep 1937 | Box 174 \ 2 img210 | |
| Letter regarding the impossibility of adapting Knee-Action suspension to the 30 HP chassis. | 1st Sep 1937 | Box 174 \ 2 img211 | |
| Follow-up letter to Cunard White Star Limited regarding an investigation into a trans-Atlantic crossing. | 2nd Sep 1937 | Box 174 \ 2 img212 | |
| Letter from the National Advisory Committee for Aeronautics thanking Mr. Robotham for his hospitality during a visit to Derby. | 16th Aug 1937 | Box 174 \ 2 img213 | |
| Letter from Cunard White Star Limited regarding a delay in correspondence about a passenger booking. | 4th Sep 1937 | Box 174 \ 2 img214 | |
| Brief note regarding a letter to be dispatched and three fans for London conditions. | 25th Oct 1937 | Box 174 \ 2 img215 | |
| Letter regarding a cure for vapour lock using high-pressure petrol pumps. | 25th Oct 1937 | Box 174 \ 2 img216 | |
| Letter from a US retailer to the factory regarding fuel pump failures and vapor lock issues. | 16th Nov 1937 | Box 174 \ 2 img217 | |
| Letter from J.S. Inskip, Inc. concerning failures of high-pressure petrol pumps and their installation. | 16th Nov 1937 | Box 174 \ 2 img218 | |
| Letter to Wilcox-Rich Manufacturing Corp. requesting information on American side-valve engine technology and valve lift. | 6th Dec 1937 | Box 174 \ 2 img219 | |
| Letter to Lycoming Motors inquiring about achieving high exhaust valve lift and follower design for motor boat engines. | 6th Dec 1937 | Box 174 \ 2 img220 | |
| Thank you letter to Mr. G.J. Mead for the 'Horseless Carriage Days' book and a personal invitation. | 23th Dec 1937 | Box 174 \ 2 img221 | |
| Letter detailing the diagnosis and resolution of a persistent engine misfiring issue in a demonstrator vehicle. | 9th Nov 1937 | Box 174 \ 2 img222 | |
| Letter to Mr. W. A. Robotham about an issue with a valve rocker mechanism sticking or returning slowly. | 3rd Nov 1927 | Box 174 \ 2 img223 | |
| Diagram illustrating adjusting screws fitted to an eccentric bushing on a rocker arm. | 3rd Nov 1927 | Box 174 \ 2 img224 | |
| Diagram for a plate designed to hold a valve open, which is anchored to a rocker arm shaft. | 3rd Nov 1927 | Box 174 \ 2 img225 | |
| Letter from B. S. Cunningham to Mr. Robotham regarding a Bentley and personal matters. | 3rd Nov 1927 | Box 174 \ 2 img226 | |
| Performance review of a Cadillac V16, comparing its acceleration times to a smaller Cadillac model. | 3rd Nov 1927 | Box 174 \ 2 img227 | |
| | | | |
