The old part of the castle is said to have been a Roman fort, and many Roman bricks are found in the walls. In later times it was still a place of defence, and sustained several sieges. The modern part, in the style of the ancient, was built by the predecessor of the present duke, and cost, as I was told, eight hundred thousand pounds. The same thing might certainly have been done in Germany for three hundred thousand reichsthalers. The garden appeared to me diversified and extensive, and the park is said to be very noble and picturesque, but the horrid weather hindered me from seeing it. In the evening I drove to Petworth, where there is another fine house. I write from the inn, where I was settled in a few minutes as if at home, for my travelling arrangements and conveniences have been greatly perfected since my residence in England. _Petworth House, Oct. 26._ Colonel C---- came to my inn early in this morning, and reproached me with not driving straight to the house of his father-in-law, Lord E----, the owner of Petworth House. He pressed me so kindly to spend at least a day there, that I could not refuse. My luggage was soon transported thither, and I as quickly installed in my room. It is a fine modern palace, with a noble collection of pictures and antiques, and a large park which contains a celebrated stud. I was peculiarly struck with three of the pictures,--Henry the Eighth, a full-length, by Holbein, remarkable for the exquisite painting of the dress and ornaments, and the fresh masterly colouring: a portrait of the immortal Newton, which is far less distinguished for its expression of intelligence, than for its pre-eminently elegant and gentlemanly air; and one of Maurice of Orange, so like our poet Houwald that it might pass for him. The mixture of statues and pictures which is common here, is disadvantageous to both. Among the curiosities is a family relic,--the great sword of Harry Percy, an ancestor of Lord E----'s. The library served, as usual, as drawing-room,--a very rational and agreeable plan. It was fitted up according to your taste,--only the best modern books, in elegant bindings; for all others there was another room upstairs. The freedom in this house was perfect, which rendered it doubly agreeable to me. One really feels not the slightest 'gène.' There were many guests of both sexes. The host himself is a learned and accomplished connoisseur in art, and at the same time a very conspicuous and successful man 'on the turf.' In his stud I saw a horse about thirty years old, ('Whalebone',) who was obliged to be supported by several grooms when he attempted to walk, and whose foals still unborn, fetch enormous sums. That's what I call a glorious old age. 'Au reste,' the regulations of the stud are very different here from ours. With all your appetite for knowledge, however, this 'thema' might interest you little, so that I shall go on to other matters.