Read it through once

He fell asleep and I lay there in a cold sweat, turning this new terror over in the whirling chaos which did duty as my mind. The burden of my thought was, How much did I divulge? How much does he know?--what a distress is this uncertainty! But by and by I evolved an idea--I would wake my brother and probe him with a supposititious case. I shook him up, and said--