How much I trust, you never can conceive.' Casting her eyes upon him for an instant, she withdrew, and left him there alone.
Gabriel, not knowing what to think, stood staring at the door with a countenance full of surprise and dismay.

The more he pondered on what had passed, the less able he was to give it any favourable interpretation.

To find this widow woman, whose life for so many years had been supposed to be one of solitude and retirement, and who, in her quiet suffering character, had gained the good opinion and respect of all who knew her--to find her linked mysteriously with an ill-omened man, alarmed at his appearance, and yet favouring his escape, was a discovery that pained as much as startled him.

Her reliance on his secrecy, and his tacit acquiescence, increased his distress of mind.

If he had spoken boldly, persisted in questioning her, detained her when she rose to leave the room, made any kind of protest, instead of silently compromising himself, as he felt he had done, he would have been more at ease.
'Why did I let her say it was a secret, and she trusted it to me!' said Gabriel, putting his wig on one side to scratch his head with greater ease, and looking ruefully at the fire.