After the death of Caxton, Wynken de Worde, his partner, continued to print in his office, living in his house at Westminster, and styling himself “Printer to Margaret, etc., the King’s Grandame.” He printed the Acts of Parliament with the Royal Arms, also many Latin and English books; in forty years over four hundred volumes. It is not known that he printed any Greek works, yet he made many improvements in the art of printing. His first care was to cut a new set of punches; he sunk these into matrices, and cast several sorts of printing letters, afterwards used in his books. He was the first English printer who introduced the Roman letter into England, using it to mark striking thoughts. His type was remarkable for its precision, and for a long time was not excelled. [Illustration: Wynken·de·Worde] The art of printing was not long in extending to other places in England besides London. It was started in Oxford in 1480, also at St. Albans in the same year, and many other places, among which were York, Canterbury, Worcester, Ipswich, and Norwich. The “Common Prayer” was printed in Dublin by Humphrey Powell, in quarto, black letter, in 1551. Before and after that period the authors of Ireland had their works printed abroad. “Euclid’s Geometry,” the first work in Latin printed with diagrams, was issued from the press of Randolt, at Venice, 1482. Aldus also printed the works of Virgil there, in Italic types, in 1501, the first attempt at producing cheap books. Blaeu, who assisted Tycho Brahe in making his mathematical instruments, effected great improvements in the printing-press. He made nine presses, and named them after the nine Muses. His fame soon reached England, where his excellent printing machines were soon after introduced. Aldus Manutius, of Venice, during a career of twenty-six years in the employment of printing, produced editions of nearly all the Greek and Roman authors then known to exist. He was also the author of several works of learning,--grammars and dictionaries of the Greek and Latin languages, the last forming a folio volume, the first that had ever been prepared.