Any one reading Latin with facility, having a good memory, and keeping a well-arranged scrap-book, needs less than half a dozen such books as the following, to make a show of learning and to astonish the world by his references and citations--the six folio volumes of Petavius, on Dogmatic Theology, and his smaller work, _Rationarium Temporum_, a sort of compendium or schedule of universal history; and a volume printed, in the latter half of the seventeenth century, at Amsterdam, compiled by Limborch, consisting of an extensive collection of letters to and from the most eminent men of that and the preceding century, such as Arminius, Vossius, Episcopius, Grotius, and many others, embracing a vast variety of literary history, criticism, biography, theology, philosophy, and ecclesiastical matters--I have before me the copy of this work, owned by that prodigy of learning, Dr. Samuel Parr, who pronounced it "a precious book;" and it may have contributed much to give to his productions, that air of rare learning that astonished his contemporaries. To complete the compendious apparatus, and give the means of exhibiting any quantity of learning, in fields frequented by few, the only other book needed is Melchior Adams's _Lives of Literati_, including all most prominently connected with Divinity, Philosophy, and the progress of learning and culture, during the fifteenth and sixteenth centuries, and down to its date, 1615. I have before me, the copy of this last work, owned by Richard Mather, and probably brought over with him, in his perilous voyage, in 1635. It was, successively, in the libraries of his son, Increase, and his grandson, Cotton Mather. At a corner of one of the blank leaves, it is noted, apparently in the hand of Increase Mather: "began Mar. 1, finished April 30, 1676." According to the popular tradition, Cotton would have read it, in a day or two. It contains interesting items of all sorts--personal anecdotes, critical comments, and striking passages of the lives and writings of more than one hundred and fifty distinguished men, such as Erasmus, Fabricius, Faustus, Cranmer, Tremellius, Peter Martyr, Beza, and John Knox. Whether Mather had access to either of the above-named works, except the last, is uncertain; but, as his library was very extensive, he sparing no pains nor expense in furnishing it, and these books were severally then in print and precisely of the kind to attract him and suit his fancy, it is not unlikely that he had them all. They would have placed in easy reach, much of the mass of amazing erudition with which he "entertained" his readers and hearers.