Contains engineering designs by William H. Peterson as well as employment applications and career history. Also a paper by Hartin Peterson and three coworkers on humidity control, and several of Hartin's design drafts with advice to William on different projects. Additional material includes Pullman employee publications, such as an 1893 copy of the Pullman journal, several editions of the Pullman Car Works Standard including reviews of the Pullman minstrel shows, and the Pullman News during World War II.