In Vingulmark , the sons of Gandalf of Vingulmark , Hysing , Helsing , and Hake , attempted to ambush Halfdan at night , but he escaped into the forest .
The narrative in Heimskringla then adds another conquest for King Halfdan .
In Vingulmark , the sons of Gandalf of Vingulmark , Hysing , Helsing , and Hake , attempted to ambush King at night , but Halfdan escaped into the forest .
The narrative in Heimskringla then adds another conquest for King Halfdan .