Typescript copies of letters written by Mary J. Allen (1836-1893), her husband H. A. Allen (1818-1882), and her stepsons Anson G. Allen (1849-1891) and Carleton B. Allen (1858-1924). The letters describe life at military posts in Washington state and Alaska. The collection also includes an introductory biographical sketch of H. A. Allen and historical information about San Juan Island, Washington.