Close to the tunnel-head we alighted, and went on into the dream on
foot, the gallery contracting to a few feet in height, where a group
of black figures bent over rock-drills which creaked and groaned. I
saw the drill-holes filled with dynamite, and retired with the others
while the fuse was lighted. I heard from afar off the thunderous
detonations as the rock-face was shattered. I saw the débris being
cleared away, before the drills should begin to grind again; and the
remembrance that, in another rathole on the Swiss side, another party
of workers was patiently advancing towards us, in precisely the same
way, sent a mysterious thrill through my blood.

"Suppose the two galleries don't meet end to end?" I spoke out my
thought.

"But they will," said Bolzano. "Our calculations are precise, and we
have allowed for an error of two inches: I do not think there will be
more. There is a great system of triangulation across the mountains,
and every few months our reckonings are verified. By-and-bye, we shall
hear the sound of each other's drills; then, down will come the last
dividing wall of rock, and Swiss and Italians will be shaking hands."

I think, in coming out of the dark tunnels and windy galleries, I felt
somewhat as Jonah must have felt after he had been discarded in
distaste by the whale. The light dazzled my eyes. I could have shouted
aloud with joy at sight of the sun. I made Bolzano breakfast with me
in the little inn at Iselle, and got upon my way again, at something
past noon. The vast turmoil of the growing railway was left behind. It
was like putting down a volume of Walt Whitman, and taking up
Tennyson.