Sue a Little Heroine by L.T. Meade

When Harris parted from Sue he ran quickly in his cowardly flight. He did not stay his fleet steps until he had gained a very quiet street. Then, knowing that he was now quite safe, he exchanged his running for a rapid walk. He suddenly remembered that he was to meet the detectives, who were moving heaven and earth to get Connie back for him, not later than three o'clock.

They were to meet by appointment in a certain street, and the hour of rendezvous was quickly approaching. He got there in good time; but what was his amazement to see, not only the two detectives -- ordinary-looking men in plain clothes -- but also the street preacher?