Landis and Graham exchanged expectant glances. But Miss Mount had her formidable temper well in leash. She turned to face the front of the house and pointed to the left.

“That front bedroom over the reception-room is the one Mr. Harrison occupied,” she explained curtly. “Next to it comes Mr. Harrison’s bathroom and the bedroom formerly used by Mrs. Harrison. They are both over the library of course. Mrs. Harrison’s room is unoccupied at present.

“On the right, from front to rear, are Miss Isabelle’s room, then her bath, then a guest room, then the linen room, then another guest room, a bathroom and Miss Anita’s room over the kitchen.”

Miss Mount turned as she indicated these rooms until she was facing the back of the house.

“Across the back from left to right,” she continued, “are the enclosed back stairs, Mr. Joel’s bedroom and his bath. The last door on the left-hand side of the house toward the rear is, of course, that of Miss Anita’s room. The door at the back there, close to it, opens into the back hall and the back stairs, up and down. This door in the middle at the back is that of Mr. Joel’s room. His bathroom to the right has no outlet other than through his bedroom.”

“Very clearly expressed,” said Bernard. “Now, does Anita’s room open into the back hall as well as into this one across the head of the stairs?”

“No, it does not.”

With a nod, Bernard mounted the right-hand flight, crossed a corner of the lateral hall and entered the narrower hall which led to the wing. In the archway he paused.

“As I understand it,” he said, “there are four bedrooms and two baths on this floor of the wing. Mr. and Mrs. Graham have the rear bedrooms and the bath between. You occupy the near front room opposite that of Mr. Graham?”

“That is correct.”