In Vingulmark , the sons of Gandalf of Vingulmark , Hysing , Helsing , and Hake , attempted to ambush Halfdan at night .
Halfdan escaped into the forest .
In Vingulmark , the sons of Gandalf of Vingulmark , Hysing , Helsing , and Hake , attempted to ambush Halfdan at night , but he escaped into the forest .