Olaf the Glorious A Story of the Viking Age by Leighton, Robert, -1934

Now, this was the selfsame oath that Olaf Triggvison had resolved to swear when it should come to his turn, and he was annoyed that Earl Sigvaldi had, as it were, snatched it from his lips. He now thought over what other vow he could make in its stead. But it chanced that ere his turn came round all the company were either asleep or so full of strong drink that they could not listen, so in the end he made no vow whatsoever. Yet to the last he was as sober as when he first entered the hall, and he remembered ever afterwards the boastful oaths that had been made. Many of his fellow vikings--as Thorkel the High, Bui the Thick, and Vagn Akison -- declared that they would but follow their chief to Norway, while others of Sweyn's following in like manner vowed to accompany the king to England; and once having made these promises, none dared to go back from them.

On the morrow, when the vikings regained their senses, they thought they had spoken big words enough, so they met and took counsel how they should bring about this expedition against Earl Hakon, and the end of it was that they determined to set about it as early as might be. For the rest of that wintertide the men of Jomsburg accordingly bestirred themselves in making preparations for the journey. They fitted out their best warships and loaded them with weapons, and their warriors were mustered to the number of eight thousand well trained men, with eighty chosen battleships.

So, when the snows of that winter had melted in the vales and the seas were clear of ice floes, Sigvaldi led his host north through the Eyr Sound and lay for a time in Lyme Firth. There he divided his forces, leaving twenty of Olaf Triggvison's longships in the firth, so that they might perchance intercept Earl Hakon should he escape the main fleet. This was an ill judged measure, but Sigvaldi was not aware that the forces of Earl Hakon were vastly superior in number to his own. Olaf's ships were left in the charge of Kolbiorn Stallare, while Olaf himself went aboard the dragonship of Vagn Akison.

Earl Sigvaldi then sailed out into the main with sixty ships, and came to Agdir, in the south of Norway. And there he fell to pillaging in the dominion of Earl Hakon.

CHAPTER X: THE BATTLE OF JOMSVIKINGS.