"I assure you that if you can get through to Scotland Yard you will receive full authority."
"I've heard of you, of course, sir, and I know you've done us a good turn now and again. But it's very irregular."
"Nevertheless, it is necessary," said Poirot calmly. "It is necessary for this reason—Grant is not the murderer."
"What? Who is, then?"
"The murderer was, I should fancy, a youngish man. He drove up to Granite Bungalow in a trap, which he left outside. He went in, committed the murder, came out, and drove away again. He was bare-headed, and his clothing was slightly blood-stained."
"But—but the whole village would have seen him!"
"Not under certain circumstances."
"Not if it was dark, perhaps; but the crime was committed in broad daylight."
Poirot merely smiled.
"And the horse and trap, sir—how could you tell that? Any amount of wheeled vehicles have passed along outside. There's no mark of one in particular to be seen."