About half a mile N.W. from the town of Oswestry is an insulated eminence of an oblong form, surrounded by two ramparts and fosses of great height and depth, which in former days was known by the name of _Caer Ogyrfan_ and _Hen Dinas_, but now recognized by the title of OLD OSWESTRY. This elevation bears the strongest marks of having been at some time a place of defence; the top is an extensive area containing 15A. 3R. 0P., and the fortifications which encompass it cannot be less than forty or fifty acres. A gentleman who visited this spot in 1797 says that a well and pavement had been discovered here. Some pieces of iron supposed to be armour had been dug up. The original entrance to this fortification appears to have been on the opposite side of the hill from the great Holyhead road. There is strong ground for the belief that this eminence was the original site of the town, which afterwards took and now bears the name of Oswestry, and that it was planted there by the ancient Britons at a very remote period. That it was known to the Britons will appear evident from the fact of both the names we have mentioned as having been applied to it being British or Welsh, Caer Ogyrfan signifying “The Field of Ogyrfan,” who was contemporary with King Arthur, and Hen Dinas signifying “The Old City.” It is evident that this magnificent work was not a sudden operation like that of a camp, but that it was a work of immense labour and ample security. The character of the elevation answers to the description given of the position of ancient British towns. They are said almost always to have been placed on a hill, and Speed tells us that the Britons “gave the name of townes to certain combersome woods which they had fortified with ramparts and ditches, whither they resort and retreat, to eschue the invasion of their enemies, which stand them in good stead, for when they have by felling trees mounted and fenced therewith a spacious plot of ground, there they build for themselves houses and cottages.” In 1767 as much timber was cut down from the ramparts as sold for £17,000.