The chief of the Scandinavian monuments, and the most interesting for our present object, comprise those groups of stones which mark battle-fields. Not only are their dates generally known with sufficient precision to throw considerable light on the question of the antiquity of such monuments in general, but they also illustrate, if they do not determine, the use of many of the groups of stones we meet with in other countries. Sjöborg devotes ten plates in his first volume to these battle-fields, illustrating twice that number of battles which occurred between the fifth and the twelfth centuries after Christ. [Illustration: 99. View of Battle-field at Kongsbacka. From Sjöborg.] The first of these, at Kongsbacka, near the coast in Halland, though of somewhat uncertain date, is worth quoting from its similarity to the alignments on Dartmoor, Ashdown, Karnac, and elsewhere, though, unfortunately, no plan or dimensions are given. On the hills beyond is a tumulus called the grave of Frode, and on the plain a conspicuous stone bears his name; but whether this was Frode V. (400) or some other Frode is not clear. Sjöborg assigns it to a date about 500, and there seems very little reason to doubt he is at least approximatively correct.[325] The second battle-field illustrated is similar to the last, except in the form of the stones, which seem to belong to a different mineralogical formation.[326] They are plainly, however, seen to be arranged in circles and lines, and are even more like forms with which we are familiar elsewhere. It is said to represent a battle-field in which the Swedish king Adil fought the Danish Snio, and in which the latter with the chiefs Eskil and Alkil were slain. As all these names are familiarly known in the mediæval history of these countries there can be no great difficulty in ascribing this battle also to about the same age as that at Kongsbacka.