I visited Maiden-Bower,[103] mentioned by Mr. Camden, but cannot think its name has any relation to that of the town: though Roman coins have been found here, I am persuaded it is a British work, like that at Ashwell, at like distance from the Chiltern, and of like form, but more circular: it stands upon a plain, but not far from the edge of a lesser eminence of these hills, about a little mile from Dunstable: the rampire is pretty high, but very little sign of a ditch; nor do I think there ever was much more: it incloses about nine acres: the ground round it is ploughed: this chalk yields good wheat. Between here and the town is a long barrow called the Mill-hill, no doubt from a mill which was afterwards set upon it; the ends of it ploughed somewhat: it stands east and west: I have no scruple in supposing it Celtic. A high prominence of the Chiltern overlooks all, called the Five Knolls, from that number of barrows, or Celtic _tumuli_, round, pretty large, and ditched about upon the very _apex_ of the hill. Close by are two round cavities, as often observed in Wiltshire. The Icening-street runs under the bottom. These chalk hills have frequently veins of strong clay intermixed, and the like between these hills and the sand more northward. This great tract of chalk comes from the eastern sea, and traverses the kingdom much in a like direction with the Icening-street. At Woburn is some fullers earth. There was a noble abbey, now the seat of the duke of Bedford; in it several valuable works of Inigo Jones left, particularly a curious grotto. [Sidenote: +Durocobrivis.+] [Sidenote: TAB XXIX. 2d Vol.]