Vance changed the subject.

“What do you think about the crimes that have been committed in this house?”

“I don’t think about them,” she mumbled; but the anxiety in her voice belied the assertion.

“You surely must hold some opinion, Mrs. Mannheim, having been here so long.” Vance’s intent gaze did not leave the woman. “Who, do you think, would have had any reason for wanting to harm these people?”

Suddenly her self-control gave way.

Du lieber Herr Jesus! I don’t know—I don’t know!” It was like a cry of anguish. “Miss Julia and Mr. Chester maybe—gewiss, one could understand. They hated everybody; they were hard, unloving. But little Ada—der süsse Engel! Why should they want to harm her!” She set her face grimly, and slowly her expression of stolidity returned.

“Why, indeed?” A note of sympathy was evident in Vance’s voice. After a pause he rose and went to the window. “You may return to your room now, Frau Mannheim,” he said, without turning. “We sha’n’t let anything further happen to little Ada.”

The woman got up heavily and, with an uneasy glance in Vance’s direction, left the room.

As soon as she was out of hearing Markham swung about.

“What’s the use of raking up all this ancient history?” he demanded irritably. “We’re dealing with things that have taken place within the past few days; and you waste valuable time trying to find out why Tobias Greene hired a cook thirteen years ago.”