But the Doctor stood still there, moved more deeply than any had seen him before, while Alice and Sam looked at one another in blank astonishment.
At length he turned and spoke, but not to them, to the empty air.

Spoke as one aroused from a trance.

Things hard to understand, yet having some thread of sense in them too.
"So he has sent for me," he said, "when it seems that he may have some use for me.

So the old man is likely to go at last, and we are to have the golden age again.

If talking could do it, assuredly we should.