The Philanderers by A.E.W. Mason

Meanwhile Fielding picked up the pile of letters from the table in Drake's chambers and went down into the street. He paused for a moment or two at the pillar-box weighing the letters in his hand. Then he slipped them into his pocket and hurried to Mrs. Willoughby's.

Mrs. Willoughby was moving restlessly about the drawing-room as he was shown in. She turned impulsively towards him, holding out both hands. 'I so hoped you would come,' she said. 'Well? You have seen him?'