I daresay I shan't succeed, but that, again, doesn't matter.

I've got to do my job, and then we'll see." Jack threw up his hands.
"You're cracked!" he said.
"I daresay," said Frank solemnly.
There was a pause.

It seemed to Jack that the whole thing must be a dream.

This simply wasn't Frank at all.

The wild idea came to him that the man who sat before him with Frank's features was some kind of changeling.