And when Harald wished to inquire of oracles how this war would end, an old man of great height, but lacking one eye, and clad also in a hairy mantle, appeared before him, and declared that he was called Odin, and was versed in the practice of warfare; and he gave him the most useful instruction how to divide up his army in the field.

Now he told him, whenever he was going to make war with his land-forces, to divide his whole army into three squadrons, each of which he was to pack into twenty ranks; the centre squadron, however, he was to extend further than the rest by the number of twenty men.

This squadron he was also to arrange in the form of the point of a cone or pyramid, and to make the wings on either side slant off obliquely from it.

He was to compose the successive ranks of each squadron in the following way: the front should begin with two men, and the number in each succeeding rank should only increase by one; he was, in fact, to post a rank of three in the second line, four in the third, and so on behind.

And thus, when the men mustered, all the succeeding ranks were to be manned at the same rate of proportion, until the end of (the edge that made) the junction of men came down to the wings; each wing was to be drawn up in ten lines from that point.