In 1891 the executive board appointed a committee to organize a Cheerful Letter Exchange, of which Miss Lilian Freeman Clarke was made the chairman. One of its chief purposes is to cheer the lonely and discouraged, invalids and others, by interchange of letters and by gifts of books and periodicals. To young persons in remote places it affords facilities for securing a better education, with the aid of correspondence classes. By means of a little monthly magazine, The Cheerful Letter, religious teaching is brought to many persons, who in this find a substitute for church attendance where that is not possible. Through the same channel, as well as by correspondence, these workers help young mothers in the right training of their children. Libraries have been started in communities destitute of books, and struggling libraries have been aided with gifts. Forty travelling libraries are kept in circulation. Although much had been done to circulate Unitarian tracts and the other publications of the American Unitarian Association, by means of colporteurs, by the aid of the post-office, as well as by direct gift of friend to friend, it remained for Miss Sallie Ellis, of Cincinnati, in 1881, to systematize this kind of missionary effort, and to make it one of the most valuable of all agents for the dissemination of liberal religious ideas. Miss Ellis was aided by the Cincinnati branch of the Women's Auxiliary, but she was from the first the heart and soul of this mission. "If there had been no Miss Ellis," says one who knew her work intimately, "there would have been no Post-office Mission. Many helped about it in various ways, but she was the mission." Miss Ellis was a frail little woman, hopelessly deaf and suffering from an incurable disease. Notwithstanding her physical limitations, she longed to be of service to the faith she cherished; and the missionary spirit burned strong within her. "I want," she said often, "to do something for Unitarianism before I die"; but the usual avenues of opportunity seemed firmly closed to her. At last, in the winter of 1877-78, Rev. Charles W. Wendte, then her pastor, anxious to find something for her to do, proposed that she should send the Association's tracts and copies of the Pamphlet Mission to persons in the west who were interested in the liberal faith. She took up this work gladly, and during that winter distributed 1,846 tracts and 211 copies of the Pamphlet Mission in twenty-six States.