There is no long history yet revealed for this elf, but recent account only. 

It is said that Atacarnë was witnessed disembarking from the ship, Sullaer, which was returning to the Havens from Tol Erresë.  For while ships may not return from Valinor, the Lonely Isle is where the White Ships ferry their people to and return.  The few of Cirdan’s people on the docks had seen him step forth from ship and were amazed.  It was not often that one chose to return from the West, stepping away from their bliss.  Most of the fair folk went there out of weariness for the hither shore, and chose to ever remain. 

Atacarnë was tall and lordly with eyes piercingly bright as he stepped once again on the hither shore.  His raven dark hair was long, though a portion of it was meticulously woven into a braid which he wore as a crown, bound in the back with a single leaf finely wrought of gold. A bracer of iron clasped his left forearm, scarred and battered, emblazoned with the Star of Eärendil.  No other adornment he wore openly, though one mariner said that he saw a glimpse of a necklace made of the finest silver revealed from beneath the white, swan embroidered cloak.  From this necklace dangled an intricately carved hammer, etched with beautiful knotwork.  His plain black and red hauberk bore the signs of battle but remained well maintained and he donned swords at his side.

Those at the dock were amazed, for they remembered this elf, that some years ago arrived with a group from Imladris.  None knew his name, for he did not speak when asked.  He boarded a white ship and was thought to have diminished wholly into the ancient west, so miserable and wretched he looked.  But that was then, and now they looked upon a mighty visage stepping from the returning ship newly come from the ancient west. 

As he left the docks, the mariners said to each other, “Atacarnë..  Atacarnë!  Behold!  The traveler is made new again by the power of the West!”  The mariners on the dock rejoiced, for they remembered what he had been when last he was in the Havens.  The joy at witnessing an Eldar broken as he was, returning to this land with strength brought great gladness.  For they were reassured in that hour of the sanctity to be found for themselves when they too boarded the white ships, even though glory of the elf kingdoms in this wide land are now long passed.  

When asked his name as he was guided to the harbormaster, he looked behind him at the mariners who now laughed and talked amongst themselves.  He then said, “Atacarnë shall be the name I take for now, as your people have called me.  And indeed I am made anew.”  There he met with emissaries of the lord over this land, and they held private councils.  It is rumored that after the meeting, he parted with no word, but was given a swift steed and supplies.  And then, in the twinkling of an eye, he was gone from their sight. 

His task and his former names, still none know. However, elves traveling west along the road recall to have seen a rider, hooded and cloaked, heading east with great determination and speed.  The last of these witnesses was at the bridge entering the Trollshaws from the Lone Lands, which is known as the Last Bridge.