We may then suppose that Glorfindel returned during the Second Age, before the 'shadow' fell on Numenor, and while the Numenoreans were welcomed by the Eldar as powerful allies. His return might have been for the purpose of strengthening Gil-Galad and Elrond, when the growing evil of the intentions of Sauron were at last perceived by them. It might, therefore, have been as early as S.A. 1200, when Sauron came in person to Lindon, and attempted to deceive Gil-Galad but was rejected and dismissed. But it may have been, perhaps more probably, as late as c. 1600, the Year of Dread, when Barad-dur was completed and the One Ring forged, and Celebrimbor at last became aware of the trap he had fallen.
 

Arvedui was indeed the last king, as his name signifies. It is said that this name was given to him at his birth by Malbeth the Seer, who said to his father: "Arvedui you shall call him, for he will be the last in Arthedain. Though the choice will come to the Dúnedain, and if they take the one that seems less hopeful, then your son will change his name and become king of great realm. If not, then much sorrow and many lives of men shall pass, until the Dúnedain arise and are united again.
 

...Listen! This is the word that the sons of Elrond bring to me from their father in Rivendell, wisest in lore: Bid Aragorn remember the words of the seer, and the Paths of Dead.
' And what may be the words of the seer?' said Legolas.
' Thus spoke Malbeth the Seer, in the days of Arvedui, last king at Fornost', said Aragorn.

Over the land there lies a long shadow,
westward reaching wings of darkness.
The Tower trembles; to the tombs of kings
doom approaches. The Dead awaken;
for the hour is come for the oathbreakers:
at the Stone of Erech they shall stand again
and hear there a horn in the hills ringing.
Whose shall the horn be? Who shall call them
from the grey twilight, the forgotten people?
The heir of him to whom the oath they swore.
From the North shall he come, need shall drive him:
he shall pass the Door to the Paths of the Dead.