The sergeant turned to Isobel.
"Did you know him?" he asked.
"No," she answered. "I did not notice him at the station at all. I saw that he was sitting at the same table downstairs as this gentleman, but I am quite sure that I have never seen him before in my life."
The sergeant put away his pocket-book.
"I am very sorry to trouble you," he said, "but I think it would be better for you all to come to Bow Street and see the superintendent."
"I am quite willing to do so," I answered, "though I can tell him no more than I have told you."
The child moved suddenly towards me. Her thin, shabbily gloved fingers gripped my arm with almost painful force. Her eyes were full of passionate appeal.
"I may go with you," she murmured. "You will not leave me alone?"
"The young lady will be required also," the sergeant remarked.
"We will go together, of course," I said gently. "Come!"