It was the tunnel—its imminence—that all of them were contemplating that afternoon on the train, each in a different way; the tunnel, at nine miles the longest in the world, slicing under the gelid landscape of the St. Gotthard Pass. To Irene it was an object of dread. She feared enclosure in small spaces, had heard from Maisie Withers that during the crossing the carriage heated up to a boiling pitch.