I need scarcely remind the reader, that the earliest wood-cut and printed books were made to imitate manuscripts so closely as to deceive the inexperienced eye. "Artes moriendi," "Specula," "Bibliæ Pauperum," and "Donatuses,"--the principal types of block books,[97]--represent illuminated manuscripts in popular demand at the date of the introduction into Europe of Xylographic Art. Spaces were frequently left, both in the block books and in the earliest books printed with movable type, for the illumination, by hand, of initial letters, so as to carry the illusion as far as possible. This practice was abandoned as soon as the learned discovered the means by which such wonderfully cheap apparent transcripts of voluminous works could be brought into the market; and the old decorated initial and ornamental letters were reproduced from type and wood blocks. The Mainz Psalter of 1457, and other books printed by Fust and Schoeffer, required only the addition of a little colour here and there to delude any inexperienced eye into the belief that they were really hand-worked throughout. Such imitations were but poor substitutes for the originals in point of beauty, however excellent when regarded from a utilitarian point of view. Every country has more or less cause to mourn the senseless destruction of many noble old volumes which the printing-press never has, and now, alas! never can replace; but none more than England, in which cupidity and intolerance destroyed recklessly. Thus, after the dissolution of monastic establishments, persons were appointed to search out all missals, books of legends, and such "superstitious books," and to destroy or sell them for waste paper; reserving only their bindings, when, as was frequently the case, they were ornamented with massive gold and silver, curiously chased, and often further enriched with precious stones; and so industriously had these men done their work, destroying all books in which they considered popish tendencies to be shown by illumination, the use of red letters, or of the Cross, or even by the--to them--mysterious diagrams of mathematical problems--that when, some years after, Leland was appointed to examine the monastic libraries, with a view to the preservation of what was valuable in them, he found that those who had preceded him had left little to reward his search. Bale, himself an advocate for the dissolution of monasteries, says: