Read "The Mystery of the Blue Train" by Agatha Christie online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
The man with the white hair continued on his course, unhurried, and seemingly indifferent to his surroundings. He took a side turning to the right and another one to the left. Now and then he hummed a little air to himself.
Suddenly he stopped dead and listened intently. He had heard a certain sound. It might have been the bursting of a tyre or it might have been -- a shot. A curious smile played round his lips for a minute. Then he resumed his leisurely walk.