I listened to catch the sound of the returning footsteps of Welbeck, and hoped that every new moment would terminate my solitude.
No signal of his coming was afforded.

At length it occurred to me that Welbeck had gone with no intention to return; that his malice had seduced me hither to encounter the consequences of his deed.

He had fled and barred every door behind him.

This suspicion may well be supposed to overpower my courage, and to call forth desperate efforts for my deliverance.
I extended my hands and went forward.

I had been too little attentive to the situation and direction of these vaults and passages, to go forward with undeviating accuracy.