On the 6th and 7th of July we kept following the spiral curves of this singular well, penetrating in actual distance no more than two leagues; but being carried to a depth of five leagues below the level of the sea. But on the 8th, about noon, the fault took, towards the south-east, a much gentler slope, one of about forty-five degrees.
Then the road became monotonously easy. It could not be otherwise, for there was no landscape to vary the stages of our journey.
On Wednesday, the 15th, we were seven leagues underground, and had travelled fifty leagues away from Snæfell. Although we were tired, our health was perfect, and the medicine chest had not yet had occasion to be opened.
My uncle noted every hour the indications of the compass, the chronometer, the aneroid, and the thermometer the very same which he has published in his scientific report of our journey. It was therefore not difficult to know exactly our whereabouts. When he told me that we had gone fifty leagues horizontally, I could not repress an exclamation of astonishment, at the thought that we had now long left Iceland behind us.
"What is the matter?" he cried.
"I was reflecting that if your calculations are correct we are no longer under Iceland."
"Do you think so?"
"I am not mistaken," I said, and examining the map, I added, "We have passed Cape Portland, and those fifty leagues bring us under the wide expanse of ocean."
"Under the sea," my uncle repeated, rubbing his hands with delight.
"Can it be?" I said. "Is the ocean spread above our heads?"