He could not hold on to the old world, here.

Most of the knowledge was lost with the old world.

Back to the old world where we were happy together.

In the old world it might well never have happened.

"You have not kept a watch on the old world?"

There seemed no great country nor city of the old world or the new in which she had not been.

It may be fun to go back to the old world.

This was the old world, and you could keep it.

How green you are and fresh in this old world!

They will not easily go back to the old world.