I 'd always thought it was just a place where the 'anging wall 'ad slipped, and that it stopped a few feet back.

But it don't--it goes on.

I crawled along it as fast as I could--I was about woozy, anyway--and by and by I 'eard the shots go off be'ind me.

But there was n't any use in going back--the tunnel was caved in.

So I kept on.
"I don't know 'ow long I went or where I went at.