“When Osborne sold the Harley collection, the scarcest old English books fetched but three or four shillings. If the Wandering Jew had been a collector in the last century, he might have turned a pretty profit by selling his old English books in this age.” But Mr. Lang did not think of a calculation, by which Mr. A. W. Pollard, in an interesting article on “English Booksales, 1676-86” (_Bibliographica_, vol. ii. p. 126), overthrew this view of the possibility of great gains. He writes-- “It is perhaps in accordance with precedent to remark that, by the judicious expenditure of five-and-twenty pounds during the ten years we have reviewed, a library of about two hundred volumes might have been acquired, which would now be cheap at £10,000. But as the £25, if invested at compound interest at five per cent., would now have amounted to nearly a million, it is well for bookmen not to make too much of such mercenary considerations.” This question of price was formerly a delicate one. Thus William Beloe was censured by some collectors for drawing attention to the subject in his “Anecdotes of Literature”; but that this objection is got over now may be seen from the great success of such a valuable annual as the “Book-Prices Current,” notwithstanding the complaints of some second-hand booksellers of injury to their business from its revelation of the real value of their books! Dibdin mentions a book-collector to whom he was pointed out at the Roxburghe sale, who exclaimed, “Hang him! why did he not publish his book in 1810? My books would have brought double the prices.”[9] Dibdin doubtless influenced the market; and in later times two men have exerted a very special influence in raising the prices of books: these are the late Mr. Henry Stevens and Mr. Bernard Quaritch. The former drew his countrymen’s attention to early books printed in and relating to America, and he caused a considerable increase in the price of Americana. But neither of these great book-buyers could have permanently raised the price of books if they had not devoted their attention to books which were well worth these advanced prices. When we deal with books of great beauty and value, and of rare occurrence, which are wanted by several rich book-collectors, it is difficult to say what price is too great for such treasures. It becomes, therefore, an important matter for the book-collector to consider what are the rules that guide the enhancement of price in books. It is not easy to codify these rules, for varying circumstances alter cases: thus new editions reduce the value of some high-priced books, but have no effect in the case of others; and time supersedes some books, while it enhances the value of others. There are, however, one or two points which may be mentioned as regulating price, for those persons who suppose prices to be altogether erratic are certainly wrong.