In the summer of 1857 Mr. Rolfe was invited to take charge of the high school at Lawrence, Massachusetts, on a larger scale than the Dorchester institution, and was again promoted after four years to Salem, and the next year to be principal of the Cambridge high school, where he remained until 1868. Since that time he has continued to reside in Cambridge, and has devoted himself to editorial and literary work. His literary labors from 1869 to the present day have been vast and varied. He has been one of the editors of the “Popular Science News” (formerly the Boston “Journal of Chemistry”), and for nearly twenty years has had charge of the department of Shakespeareana in the “Literary World” and the “Critic,” to which he has also added “Poet-Lore.” He has written casual articles for other periodicals. In 1865 he published a handbook of Latin poetry with J. H. Hanson, A. M., of Waterville, Maine. In 1867 he followed this by an American edition of Craik’s “English of Shakespeare.” Between 1867 and 1869, in connection with J. A. Gillet, he brought out the “Cambridge course” in physics, in six volumes. In 1870 he edited Shakespeare’s “Merchant of Venice” with such success that by 1883 he had completed an edition of all the plays in forty volumes. It has long been accepted as a standard critical authority, being quoted as such by leading English and German editors. He was lately engaged in a thorough revision of this edition, doing this task after he had reached the age of seventy-five. He has also edited Scott’s complete poems, as well as (separately) “The Lady of the Lake” and “The Lay of the Last Minstrel”; an _édition de luxe_ of Tennyson’s works in twelve volumes, and another, the Cambridge Edition, in one volume. He has edited volumes of selections from Milton, Gray, Goldsmith, Wordsworth, and Browning, with Mrs. Browning’s “Sonnets from the Portuguese.” He is also the author of “Shakespeare the Boy,” with sketches of youthful life of that period; “The Satchel Guide to Europe,” published anonymously for twenty-eight years; and a book on the “Elementary Study of English.” With his son, John C. Rolfe, Ph. D., Professor of Latin in the University of Pennsylvania, he has edited Macaulay’s “Lays of Ancient Rome.” He has published a series of elementary English classics in six volumes. He has also supervised the publication of the “New Century _édition de luxe_” of Shakespeare in twenty-four volumes, besides writing for it a “Life of Shakespeare” which fills a volume of five hundred and fifty pages, now published separately. It is safe to say that no other American, and probably no Englishman, has rivaled him for the extent, variety, and accuracy of his services as an editor.