Both to and from Austin as engineer and vice president responsible for the testing laboratory. Primarily concerning specifications and tests.

Between Baldwin Locomotive Works and four of its customers: Cardenas & Jucaro, Duluth & Iron Range; Electric Rack Rail Locomotives and Western Railway of Havana, concerning their orders and specifications. See also the sketch and notes files for work and testing done for specific railway lines and businesses.

Both to and from Austin as a Baldwin board member and as a private citizen. Some of the letters are personal and some relate to his professional and charitable interests and activities.

Daily accounts in English and shorthand, apparently as a security device, concerning stock and, especially, employee and labor issues; one printed brochure "Rules for Time Keeping and Payment of Wages."