How did Christian Science teaching become formalized?

To best answer this question, we can point you toward an article in The Christian Science Journal that describes the evolution of Christian Science healing. It was part of a series giving context to the Church Manual.  

The Publication of Eddy’s Poem, “The Old Man of the Mountain”

Mary Baker Eddy’s poem “The Old Man of the Mountain” was first published in The Floral Wreath, and Ladies’ Monthly Magazine, July, 1844. The author is listed as “Mrs. G. W. Glover”—Mary Baker Eddy was married to George Washington Glover until his death in 1844....

The Evolution of the Tenets of Christian Science

In the chapter titled “Recapitulation” in Science and Health with Key to the Scriptures, Mary Baker Eddy asks and answers a series of questions as she offers a summary of her theology. Page 497 of this chapter includes the following: Question. — Have Christian...