"But if you arrest my husband—"
"I have no intention of doing that, either—unless I am convinced that he was in the city when the shooting occurred. I am not in favor of indiscriminate arrests. In this case, they can do nothing but harm."
"You are very good," she said softly. "I didn't imagine that a detective—"
"Some of us are human beings, Mrs. Lawrence. Is that so strange?"
She did not answer, and for several minutes they sat in silence—each intent in thought. It was Carroll who broke the stillness:
"Do you know William Barker?"
"Barker? Why, yes—certainly. He was Mr. Warren's valet."
"I know it. Have you seen Barker since the night Mr. Warren was killed?"
"Yes." He could scarcely distinguish her answer. "Twice."
"He called here?"