"Exactly. Now, Mrs. Pitman, this knife. Can you identify it positively?"

"I can."

"But isn't it true that this is a very common sort of knife? One that nearly every housewife has in her possession?"

"Yes, sir. But that knife handle has three notches in it. I put the notches there myself."

"Before this presumed crime?"

"Yes, sir."

"For what purpose?"

"My neighbors were constantly borrowing things. It was a means of identification."

"Then this knife is yours?"

"Yes."