Contemporaneously with the formation of the Althorp Collection, the Duke of Roxburghe built a library, which was one of the finest and most perfect ever got together. The Duke turned book-hunter through a love affair, it is said. He was to have been married to the eldest daughter of the Duke of Mecklenburg-Strelitz; but when this lady's sister was selected as a wife for George III., the proposed marriage was deemed impolitic, and consequently the Duke remained single. The Duke himself is said to have traced his passion for books to the famous dinner given by his father, the second Duke, at which Lords Oxford and Sunderland were present, and at which the celebrated copy of the Valdarfer Boccaccio was produced. The history of this incident is told in our chapter on Book-sales, and need not be here more specifically referred to. The Duke was a mighty hunter, not only of books, but of deer and wild swans. So far as books are concerned, his great specialities were Old English literature, Italian poetry, and romances of the Round Table; and as the first and last of these have increased in value as years have gone by, it will be seen that the Duke was wise in his generation. Indeed, we have it on the best authority that the aggregate outlay on the Roxburghe Library did not exceed L4,000, whilst in the course of little more than twenty years it produced over L23,397, the sale taking place in June, 1812. The Duke of Roxburghe and Lord Spencer were not averse to a little understanding of the nature of a 'knock-out,' for in one of the Althorp Caxtons Lord Spencer has written: 'The Duke and I had agreed not to oppose one another at the [George Mason] sale, but after the book [a Caxton] was bought, to toss up who should win it, when I lost it. I bought it at the Roxburghe sale on the 17 of June, 1812, for L215 5s.' [Illustration: _A corner in the Althorp Library._]