The debt we owe to books was well expressed by Richard de Bury, Bishop of Durham, author of _Philobiblon_, written as long ago as 1344, published in 1473, and the earliest English treatise on the delights of literature:--"These," he says, "are the masters who instruct us without rods and ferules, without hard words and anger, without clothes or money. If you approach them, they are not asleep; if investigating you interrogate them, they conceal nothing; if you mistake them, they never grumble; if you are ignorant, they cannot laugh at you. The library, therefore, of wisdom is more precious than all riches, and nothing that can be wished for is worthy to be compared with it. Whosoever therefore acknowledges himself to be a zealous follower of truth, of happiness, of wisdom, of science, or even of the faith, must of necessity make himself a lover of books." But if the debt were great then, how much more now. This feeling that books are real friends is constantly present to all who love reading. "I have friends," said Petrarch, "whose society is extremely agreeable to me; they are of all ages, and of every country. They have distinguished themselves both in the cabinet and in the field, and obtained high honors for their knowledge of the sciences. It is easy to gain access to them, for they are always at my service, and I admit them to my company, and dismiss them from it, whenever I please. They are never troublesome, but immediately answer every question I ask them. Some relate to me the events of past ages, while others reveal to me the secrets of Nature. Some teach me how to live, and others how to die. Some, by their vivacity, drive away my cares and exhilarate my spirits; while others give fortitude to my mind, and teach me the important lesson how to restrain my desires, and to depend wholly on myself. They open to me, in short, the various avenues of all the arts and sciences, and upon their information I may safely rely in all emergencies. In return for all their services, they only ask me to accommodate them with a convenient chamber in some corner of my humble habitation, where they may repose in peace; for these friends are more delighted by the tranquillity of retirement than with the tumults of society." "He that loveth a book," says Isaac Barrow, "will never want a faithful friend, a wholesome counsellor, a cheerful companion, an effectual comforter. By study, by reading, by thinking, one may innocently divert and pleasantly entertain himself, as in all weathers, so in all fortunes." Southey took a rather more melancholy view: "My days among the dead are pass'd, Around me I behold, Where'er these casual eyes are cast, The mighty minds of old. My never-failing friends are they, With whom I converse day by day."