Severn led them to the narrow tunnel of the rear mine and, feeling the mountain weighing down on them, they half-crawled, half-walked out and back into the night air.
Severn took them to the tunnel under the mountain which was very small and dark.
mnli hypothesis: Severn took them to the tunnel under the mountain which was very small and dark. premise: Severn led them to the narrow tunnel of the rear mine and, feeling the mountain weighing down on them, they half-crawled, half-walked out and back into the night air.