As all the Northern antiquaries have made up their minds that these dolmens generally belong to the mythic period of the Stone age, and that only a few of them extend down to the semi-historic age of bronze, it is in vain to expect that they would gather any traditions or record any names that might connect them with persons known in history. We are, therefore, wholly without assistance from history or tradition to guide us either in classifying them or in any attempt to ascertain their age, while the indications which enable us to connect them with our own, or with one another, are few and far between. [Illustration: 106. Dolmen at Herrestrup.] Among the few that give any sure indications of their age, one of the most interesting is at Herrestrup, in Zeeland, which has recently been disinterred from the tumulus that once covered it.[353] On it are engraved some half-dozen representations of ships, such as the Vikings were in the habit of drawing, and which are found in great quantities on the west coast of Göttenburg.[354] According to the best authorities, these representations range from about A.D. 500 to 900,[355] and some may perhaps be more modern. Those in this dolmen do not appear to be either among the most ancient or the most modern, and if we fix on the eighth century as their date, we shall not be very far wrong. That they are also coeval with the monument seems perfectly certain. We cannot fancy any Viking engraving these on a deserted dolmen, say even 100 years old, and then covering it up with a tumulus, as this one was till recently. Had it never been covered up, any hypothesis might be proposed, but the mound settles that point. Besides the ships, however, there are an almost equal number of small circles with crosses in them, on the cap stone. Whether these are intended to represent chariot-wheels, or some other object, is not clear, but if we turn back to woodcut No. 41, representing the side-stone of the dolmen at Aspatria, we find the identical object represented there, and in such a manner that, making allowance for the difference of style in the century that has elapsed between the execution of the two engravings, they must be assumed to be identical. No engravings--so far as I know--have been published of the objects found in this Danish dolmen, but in the English one, as already mentioned, the objects found belonged to the most modern Iron age; such things, in fact, as will perfectly agree with the date of the eighth century. Among them, as will be recollected, was the snaffle-bit, so like, though certainly more modern than, Stukeley's bit found in Silbury Hill. We have thus three tumuli which from their engravings or their contents confirm one another to a most satisfactory extent, and render the dates above assigned to them, to say the least of it, very probable. If the date thus obtained for the Aspatria monument is accepted, it is further interesting as giving that of those mysterious concentric circles, with