There is no trace of humans or any related species in the deep past.

These places, too, have anchors to the past - a deep past, far back of this century.

It was an account of a potion used by black magicians in the deep past.

It's time to consign him to the deep, dark past and leave him there.

And perhaps there was life in the deep past.

You, a heroic figure returned from the deep past!

The regulator, and the last of his bloodline in the deep past.

To the deep past, or to the deep future?

Mary's deep past was a place of dark green warmth.

But the Original history of the village is lost into the deep past.