And exactly on this spot the sea covers entire forests embedded during the geological periods, now mineralised and transformed into coal; for me they are an inexhaustible mine.” “Your men follow the trade of miners here, then, Captain?” “Exactly so. These mines extend under the waves like the mines of Newcastle. Here, in their diving-dresses, pick axe and shovel in hand, my men extract the coal, which I do not even ask from the mines of the earth. When I burn this combustible for the manufacture of sodium, the smoke, escaping from the crater of the mountain, gives it the appearance of a still-active volcano.” “And we shall see your companions at work?” “No; not this time at least; for I am in a hurry to continue our submarine tour of the earth. So I shall content myself with drawing from the reserve of sodium I already possess. The time for loading is one day only, and we continue our voyage. So, if you wish to go over the cavern and make the round of the lagoon, you must take advantage of to-day, M. Aronnax.” I thanked the Captain and went to look for my companions, who had not yet left their cabin. I invited them to follow me without saying where we were. They mounted the platform. Conseil, who was astonished at nothing, seemed to look upon it as quite natural that he should wake under a mountain, after having fallen asleep under the waves.