Includes business and personal correspondence, mixed. Many letters of congratulations to Longstreet on his being named Vice-President in 1928; and on his retirement in 1931. After his death in 1933, there are many letters of condolence to his widow Mrs. Julia Longstreet and to his successor, C.C. Cameron. Personal letters include correspondence to and from his son Gilbert, who traveled in Europe and in Jul. 1931 was seriously injured in Holland in a streetcar accident. Also includes rail passes and membership cards, and early (1871) rail passes for a Superintendant L.D. Tuthill, relation to collection unknown.