Arbor Low consists of a circular platform, 167 feet in diameter, surrounded by a ditch 18 feet broad at bottom, the earth taken from which has been used to form a rampart about 15 feet to 18 feet high, and measuring about 820 feet in circumference on the top.[166] The first thing that strikes us on looking at the plan (woodcut No. 30) is that, in design and general dimensions, the monument is identical with that called "Arthur's Round Table," at Penrith. The one difference is that, in this instance, the section of the ditch, and consequently that of the rampart, have been increased at the expense of the berm; but the arrangements of both are the same, and so are the internal and external dimensions. At Arbor Low there are two entrances across the ditch, as there was in the Cumberland and Dumfriesshire examples. As mentioned above, only one is now visible there, the other having been obliterated by the road, but the two circles are in other respects so similar as to leave very little doubt as to their true features. [Illustration: 30. Arbor Low. From a drawing by Sir Gardner Wilkinson.] The Derbyshire example, however, possesses, in addition to its earthworks, a circle of stones on its inner platform, originally probably forty or fifty in number; but all now prostrate, except perhaps some of the smallest, which, being nearly cubical, may still be in _situ_. In the centre of the platform, also, are several very large stones, which evidently formed part of a central dolmen. There is another very interesting addition at Arbor Low, which is wanting at Penrith, this is a tumulus attached unsymmetrically to the outer vallum. This was, after repeated attempts, at last successfully excavated by the Messrs. Bateman, and found to contain a cist of rather irregular shape, in which were found among other things two vases[167] one of singularly elegant shape, the other less so. In themselves these objects are not sufficient to determine the age of the barrow, but they suffice to show that it was not very early. One great point of interest in this discovery is its position with reference to the circle. It is identical with that of Long Meg with reference to her daughters, and perhaps some of the stones outside Avebury, supposed to be the commencement of the avenue, may mark the principal places of interment. [Illustration: 31. Vases and Bronze Pin found in Arbor Low.] [Illustration: 32. Section of Gib Hill. No scale.]