William Hunt, Dictionary of National Biography… (1887)
“ Olaf is sufficient reason for the unfavourable light in which he is represented by northern writers. From the more trustworthy songs of his contemporaries comes a picture of the king as a mighty ruler, wise, politic, and crafty, a lover of minstrelsy and a patron of poets. They exhibit a man endowed with a remarkable power of judging the characters of others, and of using them to forward his own interests. His craftiness is abundantly proved by his intrigues in Norway, and the natural cruelty and violence of his temper surely need no special proofs. ”
