Note 98 — Chapter IV · Kenneth the Second—971–995.
Reading edition
Eric Blodæxe was killed in the year 954. His sons attacked Hakon the Good for the second or third time, after he had reigned twenty years, i.e., about 957. The arrival of Gunhilda and her sons in the Orkneys must have fallen between those two years.—Heimsk. Saga 4, c. 22.