ture of health last night. I noticed that of him, anyway!"
"He's dead now," said Allerdyke. "He's lying there dead. Come in!"
The door along the corridor from which the man of the shock head and great beard had looked out, opened again, and the big head was protruded. Its owner, seeing the two standing there, came out.
"Anything wrong?" he asked, advancing towards them in his pyjamas. "If there's any illness, I'm a medical man. Can I be of use?"
Allerdyke turned sharply, looking the stranger well over. He was not sure whether the man was an Englishman or a foreigner; he fancied that he detected a slightly foreign accent. The tone was well-meaning, and even kindly.
"I'm obliged to you," replied Allerdyke, in his characteristically blunt fashion. "I'm afraid nobody can be of use. The truth is, I came to join my cousin here, and I find him dead. Seems to me he's been dead some time. As you're a doctor, you can tell, of course. Perhaps you'll come in?"
He led the way back
Too easy to guess the main suspect---it's given away within the first hundred pages. If you can't find it, you might even enjoy the rest.