Five hundred foot without the city, on the north-east corner I espied another great curiosity, which the people think was a castle: I presently discerned it to be an amphitheatre: it is in bulk, in shape, and all points, the same as that at Dorchester, but not built of so solid materials; for it is chiefly clay and gravel: it stands in a yard by the road side, near a ruinous house and barn, upon a sloping piece of ground: eastward toward the road there is a pit: there it is sixty foot high on the out-side. The whole _area_ or _arena_ within is now covered with water, but they say it is not much above three foot deep: the bottom of it, and the work, must certainly be exceeding solid, and well compared, to retain the water so many years without draining through: it is a most noble and beautiful concave, but intirely over-grown with thorn-bushes, briars, holly, broom, furze, oak and ash trees, &c. and has from times immemorial been a yard for cattle, and a watering-pond; so that it is a wonder their trampling has not defaced it much more. I examined this fine antiquity with all the exactness possible: the terrace at top, the circular walk, the whole form, is not obscure: it is posited exactly as that before described, with its longest diameter from north-east to south-west; its entrance north-east, though farthest from the city. There is an ascent to it from the entrance side, that being upon the lowest ground: at the upper end, the level of the ground is not much below the top of the terrace, and vastly above that of the _arena_; so that I conceive the better sort of the people went that way directly from the city into their seats: there is such a gap too in that part, from the ruin of the cave where the wild beasts were kept. An old house standing there with an orchard has forwarded its ruin from that quarter; and they have levelled some part of the terrace for their garden. Surveying the whole could not but put me in mind of that piece of Roman magnificence, when the emperors caused great trees to be taken up by the roots, and planted in the amphitheatres and circs, _pro tempore_, to imitate forests wherein they hunted beasts; which here is presented in pure nature. [Sidenote: _Barrows_ Br.]