During the years the Hannas were in Boston, the church organization was taking shape and Hanna served in several key positions. In early 1893, in addition to editing the "Journal", Hanna was called to become pastor of The Mother Church. He was also chosen by Eddy to read her address to the World's Parliament of Religions in Chicago. In 1894, the Bible and the Christian Science textbook were ordained as the "impersonal pastor"; with changes in the church service, Hanna became First Reader. In 1895, around the time the "Manual of The Mother Church" was published, Eddy wrote a letter to Hanna describing the work of establishing the by-laws that would govern the church, a portion of which was later published in her book "Miscellaneous Writings" and in the front of the "Manual", before the table of contents.