King Burizleif followed him with a large army,
and in it was his son-in-law, Olaf Trygvason. The emperor had a great
body of horsemen, and still greater of foot people, and a great army
from Holstein. Harald, the Danish king, sent Earl Hakon with the army
of Northmen that followed him southwards to Danavirke, to defend his
kingdom on that side. So it is told in the "Vellekla":--

"Over the foaming salt sea spray
The Norse sea-horses took their way,
Racing across the ocean-plain
Southwards to Denmark's green domain.
The gallant chief of Hordaland
Sat at the helm with steady hand,
In casque and shield, his men to bring
From Dovre to his friend the king.
He steered his war-ships o'er the wave
To help the Danish king to save
Mordalf, who, with a gallant band
Was hastening from the Jutes' wild land,
Across the forest frontier rude,
With toil and pain through the thick wood.
Glad was the Danish king, I trow,
When he saw Hakon's galley's prow.
The monarch straightway gave command
To Hakon, with a steel-clad band,
To man the Dane-work's rampart stout,
And keep the foreign foemen out."

The Emperor Otta came with his army from the south to Danavirke, but
Earl Hakon defended the rampart with his men. The Dane-work (Danavirke)
was constructed in this way:--Two fjords run into the land, one on each
side; and in the farthest bight of these fjords the Danes had made a
great wall of stone, turf, and timber, and dug a deep and broad ditch in
front of it, and had also built a castle over each gate of it. There was
a hard battle there, of which the "Vellekla" speaks:--

"Thick the storm of arrows flew,
Loud was the din, black was the view
Of close array of shield and spear
Of Vind, and Frank, and Saxon there.
But little recked our gallant men;
And loud the cry might be heard then
Of Norway's brave sea-roving son--
'On 'gainst the foe! On! Lead us on!"

Earl Hakon drew up his people in ranks upon all the gate-towers of the
wall, but the greater part of them he kept marching along the wall
to make a defence wheresoever an attack was threatened. Many of
the emperor's people fell without making any impression on the
fortification, so the emperor turned back without farther attempt at an
assault on it. So it is said in the "Vellekla":--

"They who the eagle's feast provide
In r