The next moment Frycollin was on all fours, creeping to the back of
his cabin.

During this day the aeronef was only driven at moderate speed. She
seemed to skim the placid surface of the sea, which lay beneath.
Uncle Prudent and his companion remained in their cabin, so that they
did not meet with Robur, who walked about smoking alone or talking to
the mate. Only half the screws were working, yet that was enough to
keep the apparatus afloat in the lower zones of the atmosphere,

The crew, as a change from the ordinary routine, would have
endeavored to catch a few fish had there been any sign of them; but
all that could be seen on the surface of the sea were a few of those
yellow-bellied whales which measure about eighty feet in length.
These are the most formidable cetaceans in the northern seas, and
whalers are very careful in attacking them, for their strength is
prodigious. However, in harpooning one of these whales, either with
the ordinary harpoon, the Fletcher fuse, or the javelin-bomb, of
which there was an assortment on board, there would have been danger
to the men of the "Albatross."

But what was the good of such useless massacre? Doubtless to show off
the powers of the aeronef to the members of the Weldon Institute. And
so Robur gave orders for the capture of one of these monstrous
cetaceans.

At the shout of "A whale! "A whale!" Uncle Prudent and Phil Evans
came out of their cabin. Perhaps there was a whaler in sight! In that
case all they had to do to escape from their flying prison was to
jump into the sea, and chance being picked up by the vessel.