To gain the trust of Arvedui's restless spirit, you have performed a deed of kindness for him and delivered a lost tome to one of the descendants of his house.
'I may one day forgive my pride, but that day is not yet come.
'Long after the Thoroval perished, another ship came into the Ice Bay. It, too, was from Mithlond, and I can only assume it was seeking news of the Thoroval and its crew. That ship also perished, but the Elves attempted to flee its destruction. I do not believe they perished in the cold waters -- at least not all -- but I cannot say what their final fate was.
'Perhaps the seer of the Lossoth who sent thee to find the ship would know? Return to her and seek her guidance once more.'
Saija is at Näky-kolo north west of Kuru-leiri.
Arvedui told you that the captain of the Elf-ship did not perish with his vessel and suggested that you seek the knowledge of Saija regarding the fate of Aearil and his crew.