A chronological account of the book-sales of London would be an important as well as an interesting contribution to the history of literature. But our space is limited, and only the chief features of such a history can be dealt with in this place. If one were asked to name the most famous book in the annals of book-sales, the answer would be at once forthcoming and emphatic--the Valdarfer Boccaccio, otherwise 'Il Decamerone di Messer Giovanni Boccaccio,' printed at Venice by Christopher Valdarfer in 1471, and published, it is thought, at about 10s. In stating that this book is the most famous one, it is almost unnecessary to explain that the Roxburghe copy is understood. By what means it got into the hands of a London bookseller (about the middle of the last century) is not known. It is certain, however, that even at that period he knew of its excessive rarity, for he offered it to the two great contemporary book-collectors, Lord Oxford and Lord Sunderland, for 100 guineas, an amount which at that time must have 'appeared enormously extravagant.' Whilst these two collectors were deliberating, an ancestor of the Duke of Roxburghe saw and purchased it. Shortly after this event the two noble collectors were dining with the Duke, and the subject of Boccaccio was purposely broached. Both Lord Oxford and Lord Sunderland began to talk of the particular copy which had been offered them. The Duke of Roxburghe told them that he thought he could show them a copy of this edition, which they doubted, but, to their mortification, the Duke produced the identical copy, over which both realized that he who hesitates is lost. Beloe, in relating this anecdote, which was told him by G. Nicol, the royal bookseller, predicted that if this copy came under the hammer it would produce 'not much less than L500.' As a matter of fact and of history, at the Roxburghe sale in 1812 it realized the then huge sum of L2,260, the buyer being the Marquis of Blandford, who, it is said, was prepared to go to L5,000. There were three noble candidates for this choice book, the Duke of Devonshire, Earl Spencer, and the Marquis of Blandford, whilst an agent of Bonaparte was known to be present. The Rev. Mr. Dibdin has given a very highly-coloured and vivid account of this famous incident in his 'Bibliographical Decameron,' and we need do no more than refer to the fact that 'the honour of making the first bid was due to a gentleman from Shropshire, who seemed almost surprised at his own temerity in offering 100 guineas.' It is a curious commentary on even the fame of rare books that this copy of the Valdarfer Boccaccio came again into the sale-room in 1819, when the Blandford library was sold, and when it became the property of Earl Spencer for L918. 'I will have it when you are dead,' was the savage retort of a defeated book-lover at an auction sale, and such perhaps was Earl Spencer's mental determination when his rival