"You would have seen him!" "I did.

You had not been gone three minutes when he came round to the gap in the bank where I was standing.

He came from the side towards which I had seen you go.

It was perfectly impossible that he should not have met you.

The Professor says he must have known that you were there, looking at the storm, but that he did not know that I was with you, and that he was lying in wait for you to strike you from behind.