Getting clear of the whites, Benjen pushed his horse faster towards where he saw Jon struggeling to keep his sword aloft and about to fall to his knees. Riding past him he brought the horse to a abrupt halt and vaulted of rushing to his newphew. Jon tried to raise his sword to defend himself, not knowing if this stranger was friend or foe untill benjen lifted his hand up to his face and took of the mask that covered his mouth and nose. Jon recongnised him instantly and gave out a relieved sigh followed by "Uncle Benjen".
Grabbing him he half pulled half carried him to the waiting horse and lifted him onto it. "You ride straight for the pass." he told Jon looking up at him for the last time.
"Come with me." he could hear the pleading in Jon's voice but Benjen knew the horse wouldn't be able to get the both of them out of there fast enough. He wouldn't be able to cross the wall anyway. "There's no time." He was just about to hit the horses rump to send it on it's way when he hesitated and looked at his nephew again.
"Jon" he called softly and when he had his attention continued "When you get to the wall, return to Winterfell before heading south again. There is something there you need to see. You'll find it in the crypts. Under Lyanna's statue."
He saw the confused look on Jon's face and wished he could say more but they had ran out of what little time they had. Lifting his arm up, he brought his hand down on the horse's flank while saying "Now Go." The horse shot forward, carrying his nephew further from danger. Benjen watched him go for as long as he could, his regret at not having been able to do more for his eldest nephew leaving a bitter taste in his mouth. "Come quickly Eragon. Your Son's going to need all the firepower you can bring." he said even while knowing no one would hear him. Turning back towards the army of the dead he unfurled his chain and activated the fire.
"I've done all I can Lyanna." he whispered to himself as he got ready for what was to come.
As he became overwhelmed by whites he hoped Jon forgives them for what he would find in the crypts