It's the fear it may fly up and strike her when she ain't looking that worries me, and it worried the Professor, too.

That was why he told me.

I guess when he talked to me that time he knew his heart was going to stop suddenly some day.

And he'd got a hint that somebody was interested in watching Sylvia--sort o' keeping track of her.

And there was conscience in it; whoever it is or was hadn't got clean away from what he'd done.
Now I had a narrow escape from letting Sylvia see this letter.