He had noted that the door to Mary's room was closed.
Sanderson's dominant emotion was that of grim satisfaction.

He had compelled Maison to disgorge the money without jeopardizing his own liberty.

Judge Graney's word would suffice to prove his case should Maison proceed against him.
But Sanderson had little fear that Maison would attempt reprisal.

If he had judged the man correctly, Maison would not talk, even to Silverthorn.
Sanderson cared very little if he did talk.

He had reached the point where the killing of his enemies would come easy to him.