The side-interests of these old books are very varied. Many of them, at least to eyes trained to perceive it, are of great beauty. Others, although the half century during which printing was in its infancy produced few masterpieces of literature, have real literary interest. More than any other single event the invention of printing hurried on the transition from the medieval world to the modern, but while many printers in Italy nearly ruined themselves by the zeal with which they helped forward the classical renaissance, all over Europe the medieval books which were still read were seized on for the press, so that in the books printed between 1470 and 1490 we are presented with a conspectus or summary of medieval literature. Caxton printed the works of Chaucer and Gower and prose renderings of the old romances. The Italian presses were busy with Boccaccio, Petrarch, and Dante. The enormous size of the great Speculum or Encyclopaedia of Vincent de Beauvais did not deter the printers of France and Germany, and the ponderous tomes of medieval theology and law seem to have found a ready market. Above all, the highest skill available in the best equipped workshops was employed almost ceaselessly in the production of beautiful and often magnificent editions of the service-books of the Church for the use both of priests and laity, and it is hardly possible to dabble much in old books without acquiring an interest in liturgiology. Owing to this fact, that the early presses were so largely occupied with printing the works of the previous three centuries, there is comparatively little human interest in incunabula on their literary side. Instead of authors we have mostly to deal with editors, an assertive and depreciatory race, always vaunting their own accuracy and zeal and insisting on the incredible blunders by which previous editions had been deformed past recognition. We receive, however, no small compensation in the personal details which many of the early printers give us about themselves. Titlepages, though they occur at haphazard in a few books of the early seventies (and there is one still earlier example), did not become common till about 1490, and even twenty years later we find many books still without them. The information which we now expect to find on a titlepage was given in a paragraph, mostly at the end of the book, to which bibliographers have agreed to give the name "colophon," from [Greek: kolophon], the Greek for a "finishing stroke." As we have already noted, in many books no information of this kind is given, but when printers, or their proof readers or editors, took the trouble to write a colophon at all, they had no reason to confine themselves to the severe brevity and simplicity of statement which marks the modern titlepage. It was in colophons that editors cast stones at their predecessors, or demanded sympathy for the severity of their own labours, and it is in colophons that we find the expressions