As I said, I first had a view of Cambridge from Gogmagog hills; I am to add that there appears on the mountain that goes by this name, an ancient camp or fortification, that lies on the top of the hill, with a double, or rather treble, rampart and ditch, which most of our writers say was neither Roman nor Saxon, but British. I am to add that King James II. caused a spacious stable to be built in the area of this camp for his running homes, and made old Mr. Frampton, whom I mentioned above, master or inspector of them. The stables remain still there, though they are not often made use of. As we descended westward we saw the Fen country on our right, almost all covered with water like a sea, the Michaelmas rains having been very great that year, they had sent down great floods of water from the upland countries, and those fens being, as may be very properly said, the sink of no less than thirteen counties—that is to say, that all the water, or most part of the water, of thirteen counties falls into them; they are often thus overflowed. The rivers which thus empty themselves into these fens, and which thus carry off the water, are the Cam or Grant, the Great Ouse and Little Ouse, the Nene, the Welland, and the river which runs from Bury to Milden Hall. The counties which these rivers drain, as above, are as follows:— Lincoln, Warwick, Norfolk, * Cambridge, Oxford, Suffolk, * Huntingdon, Leicester, Essex, * Bedford, * Northampton Buckingham, * Rutland. Those marked with (*) empty all their waters this way, the rest but in part. In a word, all the water of the middle part of England which does not run into the Thames or the Trent, comes down into these fens. In these fens are abundance of those admirable pieces of art called decoys that is to say, places so adapted for the harbour and shelter of wild fowl, and then furnished with a breed of those they call decoy ducks, who are taught to allure and entice their kind to the places they belong to, that it is incredible what quantities of wild fowl of all sorts, duck, mallard, teal, widgeon, &c., they take in those decoys every week during the season; it may, indeed, be guessed at a little by this, that there is a decoy not far from Ely which pays to the landlord, Sir Thomas Hare, £500 a year rent, besides the charge of maintaining a great number of servants for the management; and from which decoy alone, they assured me at St. Ives (a town on the Ouse, where the fowl they took was always brought to be sent to London) that they generally sent up three thousand couple a week. There are more of these about Peterborough, who send the fowl up twice a week in waggon-loads at a time, whose waggons before the late Act of Parliament to regulate carriers I have seen drawn by ten and twelve horses a-piece, they were laden so heavy.