Typescript and manuscript letters to Thomas Loome from various correspondents in the USA and Europe regarding Loome's research, in English, German, French, and Italian. The letters are arranged by language. Of note is a letter to Fr. Pedro Arrupe, at the time the Superior General of the Jesuits, on behalf of Loome which briefly describes Loome's project and his search for materials. Also includes a folder with a list of the archives to which Loome wrote in his search for research materials.