 According to Njal 's Saga , Óspak was on the wing opposite King Sigtrygg Silkbeard . Óspak went through the entire battle on this wing , and was sorely wounded and lost both his sons before Sigtrygg fled . However , that Óspak engaged Sigtrygg contradicts the historical opinion that Sigtrygg did not actually take part in the battle but was instead holding the garrison in reserve in Dublin . 
