The main channel in the centre was kept clear
and deep to afford an uninterrupted course for navigation; but on
either side were rocks that broke the river into pools and shallows,
such as here, no less than on Earth, form the favourite haunts or
spawning places of the fish. In some of the lesser pools birds larger
than the stork, bearing under the throat an expansible bag like that
of the pelican, were seeking for prey. They were watched and directed
by a master on the shore, and carried to a square tank, fixed on a
wheeled frame not unlike that of the ordinary carriage, which
accompanied him, each fish they took. I observed that the latter were
carefully seized, with the least possible violence or injury, placed
by a jerk head-downmost in the throat-bag, which, though when empty it
was scarcely perceptible, would contain prey of very considerable size
and weight, and as carefully disgorged into the tank. In one of the
most extensive pools, too deep for these birds, a couple of men had
spread a sort of net, not unlike those used on Earth, but formed of
twisted metal threads with very narrow meshes, enclosing the whole
pool, a space of perhaps some 400 square yards.
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