“The Black Sailor went out this way, waited in the shadows at the corner of the back street until he saw Mr. Tovey pass, then followed him and caught him up among the crowd outside the Express Train. The knife required no violence in its use, merely a firm push in one of the spots which Dr. Morlandson had shown me. The actual stabbing was a very simple matter, and the Black Sailor disappeared in the crowd, to return here by the way he went out and transform himself into Mr. Ludgrove.

“But I realized that this method, although it had served its purpose once, was inartistic and dangerous. There was always the risk that the Black Sailor might be recognized and traced back here. As a matter of fact, Wal Snyder had noticed him, but his evidence was discredited. The police, however, were compelled to offer a reward for him, and I determined that the Black Sailor must be reserved for special purposes.