The nucleus of the department of manuscripts at the British Museum was formed by the Harleian, Sloanean, and Cottonian collections. To these George II. added, in 1757, the manuscripts of the ancient royal library of England. Of these, one of the most remarkable is the "Codex Alexandrinus;" a present from Cyril, patriarch of Constantinople, to King Charles I. It is in four quarto volumes, written upon fine vellum, probably between the fourth and sixth centuries, and is believed to be the most ancient manuscript of the Greek Bible now extant. Many of the other manuscripts came into the royal collection at the time when the monastic institutions of Britain were destroyed; and some of them still retain upon their spare leaves the honest and hearty anathemas which the donors denounced against those who should alienate or remove the respective volumes from the places in which they had been originally deposited. This collection abounds in old scholastic divinity, and possesses many volumes, embellished by the most expert illuminators of different countries, in a succession of periods down to the sixteenth century. In it are also preserved an assemblage of the domestic music-books of Henry VIII., and the "Basilicon Doron" of James I. in his own handwriting. The Cottonian collection, which was purchased for the use of the public in 1701, and annexed by statute to the British Museum in 1753, consists of 861 manuscript volumes, including "Madox's Collections on the Exchequer," in ninety-four volumes, besides many precious documents connected with our domestic and foreign history, about the time of Elizabeth and James. It likewise contains numerous registers of English monasteries; a rich collection of royal and other original letters; and the manuscript called the "Durham Book," being a copy of the Latin Gospels, with an interlinear Saxon gloss, written about the year 800, illuminated in the most elaborate style of the Anglo-Saxons, and believed to have once belonged to the venerable Bede. The Harleian collection is still more miscellaneous, though historical literature in all its branches forms one of its principal features. It is particularly rich in heraldic and genealogical manuscripts; in parliamentary and legal proceedings; in ancient records and abbey registers; in manuscripts of the classics, amongst which is one of the earliest known of Homer's "Odyssey;" in missals, antiphonars, and other service-books of the Catholic Church; and in ancient English poetry. It possesses two very early copies of the Latin Gospels, written in gold letters; and also contains a large number of splendidly illuminated manuscripts, besides an extensive mass of correspondence. It further includes about three hundred manuscript Bibles or Biblical books, in Hebrew, Chaldaic, Greek, Arabic, and Latin; nearly two hundred volumes of writings of the fathers of the church; and a number of works on the arts and sciences, among which is a tract on the steam-engine, with