The Mystery of the Black Rhino by Franklin W. Dixon

headed.
    They wound their way through back alleys and several dimly lit shops, where no one seemed to think there was anything unusual about the Hardy boys carrying a bleeding elderly man.
    Finally just when Joe thought he couldn’t go any farther, they entered a covered passage that smelled of rotting garbage and stopped in front of a scarred wooden door.
    Lilly took a key from one of her pockets, inserted it into the ancient lock, and opened the door.
    Once inside, she lit a lamp, allowing the Hardy boys to see where they were: the professor’s apartment.
    Joe looked around. There were books stacked everywhere. Faded prints of some of the magnificent wildlife of Kenya adorned the walls.
    â€œWe need to put him to bed,” Lilly said. “Bring him this way.”
    The professor’s bedroom was at the back of the small apartment. Frank and Joe laid him gently on the bed.
    â€œWe’ll need hot water, Joseph,” Lilly said. “The kettle is on the stove. Please get it ready.”
    Joseph left the bedroom to do what Lilly had asked.
    â€œIs there anything that we can do?” Joe asked.
    Lilly had begun to undo the professor’s shirt. “Well, yes, you can check the medicine cabinet in the bathroom,” she said. “Bring whatever salves you can find.”
    But before the Hardy boys could react to Lilly’s request, there was a loud pounding on the door.
    â€œPolice!” a voice shouted. “Open up!”
    â€œOh, no!” Lilly moaned. She looked at Frank and Joe. “They can’t find you here. They won’t believe you’re not involved. You have to forget what you’ve seen!” She nodded toward the window. “Out that way! Just start running!”
    â€œWhat about you?” Frank asked.
    â€œI’m not going to leave Professor Makadara,” Lilly said. “Now, go!”
    In the front of the apartment, Frank and Joe could hear the door splinter. They raced to the window, opened it, and climbed out onto the ground. Lilly was standing there to close the window afterthem and to pull the curtains. With luck, no one would know they had been there.
    â€œAs much as I’d like to help,” Frank said to Joe as they raced down the alley, “I don’t think I’m ready to spend several years in a Kenyan jail.”
    â€œI wonder what Lilly meant, that Professor Makadara was wanted for questioning,” Joe said.
    â€œMaybe he’s some sort of a fanatic, Joe,” Frank replied. “We probably believe in some of the same things he believes in, but we follow the laws in our country. I’m thinking that maybe he didn’t.”
    Without Lilly and Joseph leading the way for them, Frank and Joe had no idea where they were headed. Now people who hadn’t paid any attention to them before were giving them strange looks. The Hardy boys weren’t sure they were in a part of Nairobi where people cared about the Hardy name.
    Frank and Joe quickened their pace and soon reached a street. A sign identified it as Haile Selassie Avenue. For a moment they didn’t know which direction to take. Joe thought that going left would get them back to the hotel. It turned out that he was right. It led them back to Moi Avenue. Just as they were about to cross, a police car sped by, forcing them to jump back onto the sidewalk.
    â€œLilly!” Frank called.
    Joe looked around. “Where?” he asked.
    â€œIn that police car. I’m sure it was her,” Franksaid. “She had her face pressed against the window, looking in our direction.”
    â€œLilly was worried that they were going to arrest Professor Makadara,” Joe said. “I wonder why they arrested her.”
    â€œWe need to talk to Dad about this, Joe,” Frank said. “Maybe he can think of some way we can help Lilly, or at least figure out why this happened.”
    They crossed Moi Avenue and headed to the New Stanley Hotel. As they