Before the caravan had put itself in motion the train had started, and was now creeping along the road with the lazy deliberation of a way train, awakening, as it receded in the distance, deep subterranean echoes. As it entered the tunnel at kilometre 172, the steam issued from the steam whistle with a shriek that resounded through the air. From the dark mouth of the tunnel came volumes of whitish smoke, a succession of shrill screams like the blasts of a trumpet followed, and at the sound of its stentorian voice villages, towns, the whole surrounding country awoke. Here a cock began to crow, further on another. Day was beginning to dawn.