He continued cautiously, making his way so that he could come up behind a thick growth of bush unseen, within a dozen paces of them.

At last he was as near as that to her, and Keok was still standing on the log with her back toward him.
It puzzled him that he could not see or hear the others.

And something about Keok puzzled him, too.

And then his heart gave a sudden throb and seemed to stop its beating.

It was not Keok on the log.