The two border side-pieces, each containing three small scenes in canopied compartments relating to the Last Judgment, evidently form part of a set for use in a _Book of Hours_. These identical border-pieces have not been found used elsewhere, but are evidently copied from, and resemble in every detail, two of a set used in a _Book of Hours_ printed at Kirchheim. Very little, however, can be deduced from similarity of design, for printers copied designs which pleased them from any source, and often with such extraordinary accuracy as to require very careful scrutiny to distinguish the copy from the original. This is the rarest of all Siberch’s books, for only one copy is known, now in the Bodleian. It formerly belonged to John Selden and went with the rest of his books to Oxford by bequest in 1659. Of the next book four copies are known. It consists of a translation of Lucian’s πὲρι διψάδων by Henry Bullock, and a reissue of the latter’s Oration. On the title-page Siberch uses for the first time his ornamental border with the Royal arms at the base. A very curious statement, that this border is the first specimen of English copperplate engraving, has found its way into a number of books. Its earliest appearance seems to be in Herbert’s _Typographical Antiquities_, where a so-called facsimile is given. Now this facsimile itself is a very roughly-executed metal engraving, and from the text it is clear that Herbert made his description from this rough engraving and not from the book itself. The proof of this is clear. The engraver has added a rough facsimile of the two-lined colophon, immediately below the border, and Herbert, assuming it to be part of the title-page, has so described it in his text. The most cursory glance would show this border to be a woodcut, but the old statement goes on being repeated. The fourth book, Baldwin’s _Sermo de altaris sacramento_ was issued in the summer, probably August, of 1521. In this is found for the first time the smaller device of the Royal arms. Eight copies of the book are known, two being in the University Library while another has lately been discovered in the library of Magdalene College. One of those in the University Library, which it is suggested may be an early copy sent to Nicholas West, bishop of Ely, to whom the book is dedicated, shows some variations from the ordinary copies. It is clear that it is an early issue, since the border is without a small break noticeable in other copies, and the first word of the title-page, Reverendissimi, has been misprinted Reverndissimi, a mistake almost immediately noticed and corrected. In this book, for the first time, Siberch begins to use one of his ornamental capitals, a fine six-line S.