The first (Aldine) edition of Plato has advanced in value from 5 guineas to just twice that sum. The very beautiful copy of this _editio princeps_ on vellum, and now in the British Museum, was purchased by the Museum authorities at Dr. Askew's sale in 1775 for 53 guineas. The commercial value of the very scarce and splendid first edition, in six volumes (Aldus, 1495-98), of Aristotle, shows a depreciation--from 17 to 15 guineas--although it has realized in comparatively recent years as much as L51. Dr. Harwood adds to his entry of this book: 'The finest copy of this first edition of Aristotle's works, perhaps in Europe, is in Dr. Hunter's Museum.' Dr. Hunter gave L4 6s. for a 'most beautiful copy of the first edition of Theocritus,' Aldus, 1495--an edition which also includes Hesiod, Theognis, Phocylides, etc.,--the value of which is now placed at L10. A much more considerable advance is seen in connection with the _editio princeps_ of Musaeus, 1494, a choice and beautiful book, which is at once the first and rarest production of the Aldine Press. George III. gave in 1775 17 guineas for a fine copy, which would now realize twice that amount. An almost equally emphatic advance may be chronicled in connection with the 'Anthologia Graeca,' Florence, 1494, printed throughout in capital letters, which, selling for 15 guineas a century and a quarter ago, is now worth nearly double; whilst the Sunderland copy in 1881 brought L51. The first impressions of Diodorus Siculus, 1539, and Stephanus Byzantius, Aldus, 1502, are stationary at about L2 each, and Lucian, Florence, 1496, now, as in 1776, sells for L20.