At the age of twelve Olaf went to sea; furnished with a little fleet, and skilful sea-counsellor, expert old Rane, by his Foster-father, and set out to push his fortune in the world. Rane was a steersman and counsellor in these incipient times; but the crew always called Olaf "King," though at first, as Snorro thinks, except it were in the hour of battle, he merely pulled an oar. He cruised and fought in this capacity on many seas and shores; passed several years, perhaps till the age of nineteen or twenty, in this wild element and way of life; fighting always in a glorious and distinguished manner. In the hour of battle, diligent enough "to amass property," as the Vikings termed it; and in the long days and nights of sailing, given over, it is likely, to his own thoughts and the unfathomable dialogue with the ever-moaning Sea; not the worst High School a man could have, and indeed infinitely preferable to the most that are going even now, for a high and deep young soul. His first distinguished expedition was to Sweden: natural to go thither first, to avenge his poor father's death, were it nothing more. Which he did, the Skalds say, in a distinguished manner; making victorious and handsome battle for himself, in entering Maelare Lake; and in getting out of it again, after being frozen there all winter, showing still more surprising, almost miraculous contrivance and dexterity. This was the first of his glorious victories, of which the Skalds reckon up some fourteen or thirteen very glorious indeed, mostly in the Western and Southern countries, most of all in England; till the name of Olaf Haraldson became quite famous in the Viking and strategic world. He seems really to have learned the secrets of his trade, and to have been, then and afterwards, for vigilance, contrivance, valor, and promptitude of execution, a superior fighter. Several exploits recorded of him betoken, in simple forms, what may be called a military genius.