The palm of the highest price ever paid for a single book must be awarded to the 'Psalmorum Codex,' printed, like the last, by Fust and Schoeffer in 1459. By the side of this the Gutenberg Bible is a common book, and Sir John Thorold's example is the only one which has occurred in the market for almost a century. This particular copy realized 3,350 francs in the McCarthy sale, and 130 guineas in that of Sir M. M. Sykes; but at the Thorold sale, in 1884, it fetched L4,950. Of the 'Codex' there are only nine copies known, all of which slightly differ from one another. We may also include here a mention of a copy of the Balbi 'Catholicon'--'Summa Quae vocatur Catholicon, sive Grammatica et Linguae Latina'--1460, for which Sir John Thorold paid L65 2s., and which at his sale fetched L400. The British Museum copy of this book belonged to Dr. Mead, at whose sale it was purchased for L25 for the French King; the copy subsequently became the property of West, at whose sale it became George III.'s for L35 3s. 6d. The Balbi 'Catholicon,' of 1460, is the fourth book printed with a date, and is one of the few indubitable productions of Gutenberg's press. It is an indispensable volume in a collection of books printed in the fifteenth century. Its literary merit is very considerable, and the London editor of 'Stephani Thesaurus Latinus' has pronounced it the best Dictionary for the Latin Fathers and Schoolmen. In addition to the copies just mentioned, a fine example, bound in russia-extra by Roger Payne, occurred in the Wodhull sale, January 12, 1886, and realized L310. This or a similar copy was priced in Quaritch's 'Catalogue of the Monuments of the Early Printers,' at L420.