If all great men have not been book-collectors in the manner which is generally understood by the phrase, it is certain that they have, perhaps without a single exception, been book-lovers. They appear, for the most part, to have made a constant companion of some particularly favourite book; for instance, St. Jerome slept with a copy of Aristotle under his pillow; Lord Clarendon had a couple of favourites, Livy and Tacitus; Lord Chatham had a good classical library, with an especial fondness for Barrow; Leibnitz died in a chair with the 'Argenis' of Barclay in his hand; Kant, who never left his birthplace, Koenigsburg, had a weakness in the direction of books of travel. 'Were I to sell my library,' wrote Diderot, 'I would keep back Homer, Moses, and Richardson.' Sir W. Jones, like many other distinguished men, loved his Caesar. Chesterfield, agreeing with Callimachus, that 'a great book is a great evil,' and with La Fontaine-- 'Les longs ouvrages me font peur Loin j'epuiser une matiere Il faut n'en prendre que la fleur'-- hated ponderous, prosy, pedantic tomes. Garrick had an extensive collection on the history of the stage, but Shakespeare was his only constant friend. Gibbon was a book-collector more in the sense of a man who collects books as literary tools than as a bibliophile. But it is scarcely necessary just now to enter more fully into the subject of great men who were also book-lovers. Sufficient it is, perhaps, to know that they have all felt the blessedness of books, for, as Washington Irving in one of his most lofty sentences has so well put it, 'When all that is worldly turns to dross around us, these [the comforts of a well-stored library] only retain their steady value; when friends grow cold, and the converse of intimates languishes into vapid civility and commonplace, _these_ only continue the unaltered countenance of happier days, and cheer us with that true friendship which never deceived hope nor deserted sorrow.' It is infinitely easier to name those who have collected books in this vast and unwieldy London of ours, than it is to classify them. To adopt botanical phraseology, the _genus_ is defined in a word or two, but the species, the varieties, the hybrids, and the seedlings, how varied and impossible their classification! Most men have bought books, some have read a few, and others many; but beyond this rough grouping together we shall not attempt anything. One thing, however, the majority of book-collectors agree in, and that is in regarding their own generation as a revolution--they have, as Butler has described it in his picture of an antiquary, 'a great value for that which is past and gone, like the madman that fell in love with Cleopatra.'