breakwater pierced by hundreds of channels. On the 19th, in the
morning, the "Albatross" was over the strait of La Perouse between
Saghalien and Northern Japan, and had reached the mouth of the great
Siberian river, the Amoor.

Then there came a fog so dense that the aeronef had to rise above it.
At the altitude she was there was no obstacle to be feared, no
elevated monuments to hinder her passage, no mountains against which
there was risk of being shattered in her flight. The country was only
slightly varied. But the fog was very disagreeable, and made
everything on board very damp.

All that was necessary was to get above this bed of mist, which was
nearly thirteen hundred feet thick, and the ascensional screws being
increased in speed, the "Albatross" was soon clear of the fog and in
the sunny regions of the sky. Under these circumstances, Uncle
Prudent and Phil Evans would have found some difficulty in carrying
out their plan of escape, even admitting that they could leave the
aeronef.

During the day, as Robur passed them he stopped for a moment, and
without seeming to attach any importance to what he said, addressed
them carelessly as follows: "Gentlemen, a sailing-ship or a steamship
caught in a fog from which it cannot escape is always much delayed.
It must not move unless it keeps its whistle or its horn going. It
must reduce its speed, and any instant a collision may be expected.
The "Albatross" has none of these things to fear. What does fog
matter to her? She can leave it when she chooses. The whole of space
is hers." And Robur continued his stroll without waiting for an
answer, and the puffs of his pipe were lost in the sky.