It is apparent that much of the horn-book is incorporated in the “New England Primer,” although the development of the latter may be considered independently. The Primer is an indispensable part of Puritan history in America, despite the fact that its source extends as far back as the time of Henry VIII, when it was probably regarded more in the light of a devotional than of an educational book. The earliest mention of it in New England was that published in the Boston _Almanac_ of 1691, when Benjamin Harris, bookseller and printer, called attention to its second impression.[20] Before that, in 1685, Samuel Green, a Boston printer, issued a primer which he called “The Protestant Teacher for Children,” and a copy of which may be seen in the library of the American Antiquarian Society of Worcester, Massachusetts. The title would indicate also that in America the primer for children at first served the same purpose as the morality play for adults in England; it was a vehicle for religious instruction. The oldest existent copy of the New England Primer bears the imprint of Thomas Fleet, son-in-law of the famous Mrs. Goose, of whom we shall speak later. This was in 1737. Before then, in 1708, Benjamin Eliot of Boston, probably encouraged by earlier editions of primers, advertised “The First Book for Children; or, The Compleat School-Mistress”; and Timothy Green in 1715 announced “A Primer for the Colony of Connecticut; or, an Introduction to the True Reading of English. To which is added Milk for Babes.” This latter title suggests the name of the Reverend John Cotton, and, furthermore, the name of Cotton Mather, one of the austere writers, as the titles of his books alone bear witness.