There was an Upland man called Markus of Skog, who was a relation of
Earl Sigurd. Markus brought up a son of King Sigurd Mun, who was also
called Sigurd. This Sigurd was chosen king (A.D. 1162) by the Upland
people, by the advice of Earl Sigurd and the other chiefs who had
followed King Hakon. They had now a great army, and the troops were
divided in two bodies; so that Markus and the king were less exposed
where there was anything to do, and Earl Sigurd and his troop, along
with the lendermen, were most in the way of danger. They went with their
troops mostly through the Uplands, and sometimes eastwards to Viken.
Erling Skakke had his son King Magnus always with him, and he had also
the whole fleet and the land defence under him. He was a while in Bergen
in autumn; but went from thence eastward to Viken, where he settled in
Tunsberg for his winter quarters (A.D. 1163), and collected in Viken all
the taxes and revenues that belonged to Magnus as king; and he had
many and very fine troops. As Earl Sigurd had but a small part of the
country, and kept many men on foot, he soon was in want of money; and
where there was no chief in the neighbourhood he had to seek money by
unlawful ways,--sometimes by unfounded accusations and fines, sometimes
by open robbery.