the whole, that day and the next we made considerable way horizontally, very little vertically.
On Friday evening, the 10th of July, according to our calculations, we were thirty leagues southeast of Rejkiavik, and at a depth of two leagues and a half.
At our feet there now opened a frightful abyss. My uncle, however, was not to be daunted, and he clapped his hands at the steepness of the descent.
“This will take us a long way,” he cried, “and without much difficulty; for the projections in the rock form quite a staircase.”
The ropes were so fastened by Hans as to guard against accident, and the descent commenced. I can hardly call it perilous, for I was beginning to be familiar with this kind of exercise.
This well, or abyss, was a narrow cleft in the mass of the granite, called by geologists a ‘fault,’ and caused by the unequal cooling of the globe of the earth. If it had at one time been a passage for eruptive matter thrown out by Snæfell, I still could not understand why no trace was left of its passage. We kept going down a kind of winding staircase, which seemed almost to have been made by the hand of man.
Every quarter of an hour we were obliged to halt, to take a little necessary repose and restore the action of our limbs. We then sat down upon a fragment of rock, and we talked as we ate and drank from the stream.
Of course, down this fault the Hansbach fell in a cascade, and lost some of its volume; but there was enough and to spare to slake our thirst. Besides, when the incline became more gentle, it would of course resume its peaceable course. At this moment it reminded me of my worthy uncle, in his frequent fits of impatience and anger, while below it ran with the calmness of the Icelandic hunter.
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 southeast, 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?”
“Of course, Axel. What can be more natural? At Newcastle are there not coal mines extending far under the sea?”
It was all very well for the Professor to call this so simple, but I could not feel quite easy at the thought that the boundless ocean was rolling over my head. And yet it really mattered very little whether it was the plains and mountains that covered our heads, or the Atlantic waves, as long as we were arched over by solid granite. And, besides, I was getting used to this idea; for the tunnel, now running straight, now winding as capriciously in its inclines as in its turnings, but constantly preserving its southeasterly direction, and always running deeper, was gradually carrying us to very great depths indeed.
Four days later, Saturday, the 18th of July, in the evening, we arrived at a kind of vast grotto; and here my uncle paid Hans his weekly wages, and it was settled that the next day, Sunday, should be a day of rest.
Chapter XXV.
De Profundis
I therefore awoke next day relieved from the preoccupation of an immediate start. Although we were in the very deepest of known depths, there was something not unpleasant about it. And, besides, we were beginning to get accustomed to this troglodyte10 life. I no longer thought of sun, moon, and stars, trees, houses, and towns, nor of any of those terrestrial superfluities which are necessaries of men who live upon the earth’s surface. Being fossils, we looked upon all those things as mere jokes.
The grotto was an immense apartment. Along its granite floor ran our faithful stream. At this distance from its spring the water was scarcely tepid, and we drank of it with pleasure.
After breakfast the Professor gave a few hours to the arrangement of his daily notes.
“First,” said he, “I will make a calculation to ascertain our exact position. I hope, after our return, to draw a map of our journey, which will be in reality a vertical section of the globe, containing the track of our expedition.”
“That will be curious, uncle; but are your observations sufficiently accurate to enable you to do this correctly?”
“Yes; I have everywhere observed the angles and the inclines. I am sure there is no error. Let us see where we are now. Take your compass, and note the direction.”
I looked, and replied carefully:
“Southeast by east.”
“Well,” answered the Professor, after a rapid calculation, “I infer that we have gone eighty-five leagues since we started.!
“Therefore we are under mid-Atlantic?”
“To be sure we are.”
“And perhaps at this very moment there is a storm above, and ships over our heads are being rudely tossed by the tempest.”
“Quite probable.”
“And whales are lashing the roof of our prison with their tails?”
“It may be, Axel, but they won’t shake us here. But let us go back to our calculation. Here we are eighty-five leagues southeast of Snæfell, and I reckon that we are at a depth of sixteen leagues.”
“Sixteen leagues?” I cried.
“No doubt.”
“Why, this is the very limit assigned by science to the thickness of the crust of the earth.”
“I don’t deny it.”
“And here, according to the law of increasing temperature,
