When the boys entered the study, closely followed by Lieutenant Gordon and Jimmie, they found three men in the room. One was Mr. Shaw, lying on a couch at the front of the apartment. One was Dr. Benson, who sat in an easy chair at his side. The third was Pedro, the servant mentioned by Frank as one of his father's favored attendants. He stood by the couch as the boys stepped into the room, his bold black eyes studying their faces impertinently as they entered.