Rev. Joseph May, Rev. Charles Allen, and Rev. F. L. Hosmer sent Miss Ellis many of their printed sermons for distribution, which did good service. Rev. William C. Gannett early saw the possibilities of this work, and has done much to systematize and further it in many ways. He christened it the "Post Office Mission," and, seeing the need of more fresh material for distribution, devised and edited the "Church Door Pulpit" series of sermons, and has also been the chief promoter of the "Unity Mission" series of tracts. The following extracts are from Miss Ellis's letters to him. SEPTEMBER 12, 1882. Received to-day, from ----, your letter of September 5, asking about our "Missionary Work by Letter." ... I will very gladly afford you my assistance in that respect. However, I am rather more conservative than yourself,--rather of the E. S. Gannett type,--still have visited Omaha, where I have had brothers settled, and know some little of the style of religion which is requisite in the Northwest.... Will give you a list of the tracts I have used most profitably. Most people state, when they ask for literature, "Want something that teaches the _doctrines_ of the Unitarian Church." Thereupon I have forwarded, from time to time, "Unitarian Doctrines and Principles" (Brigham); "Word of God" and "The Rising Star of the Liberal Faith" (W. P. Tilden); "New Hampshire Statement of Belief;" "Unitarian Belief in Bible Language;" "Why Am I a Unitarian?" "Inspiration of New Testament," "Revivals" (Clarke); "Our Common Christianity" (A. P. Stanley); "Mission of Unitarianism" (Heber Newton); "Spiritual Christianity." (Starr King); and "What Do Unitarians Believe?" (C. W. Wendte).... The serial sermons of Chadwick, Clarke, Hale, and Savage always gladly received.... But do not be afraid of a little doctrine, Mr. Gannett, for there are some people in Orthodox churches who are hungering and thirsting for just our doctrines. They cannot do without doctrine just yet, but want something better than they have known, and think it a great blessing to find it. I try my congregation to see what each requires, and lead them on and up. My church is composed of a very mixed set.... I am deeply interested in this work, and know we have done much good.... We keep books to loan, and also recommend books from time to time, and ask our correspondents to subscribe to the periodicals.... Dr. Dewey's sermons on "Human Nature" and "Human Life," and his "Two Great Commandments" benefit some people very much. * * * * * March 11, 1883.