This series is contained in box 1, folders 6 and 7. Folder 6 consists of 17 letters, telegrams and invitations written to and from Epperson, his wife, friends, and colleagues. Material is arranged by date, 1893-1939 (undated material is at the end). Folder 7 consists of postcards, including picture postcards of the Eppersons and others, travel postcards, and postcards for holidays and special occasions. One travel postcard has correspondence written on the back.