south-west. The sky looked black and threatening, the barometer began to
fall, and before long down came snowflakes on the upper heights of Mount
Terror.

"All these warnings were an open book to the Emperor penguins, and if one
knew the truth there probably were many others too. They were in
consequence unsettled, and although the ice had not yet started moving
the Emperor penguins had; a long file was moving out from the bay to the
open ice, where a pack of some one or two hundred had already collected
about two miles out at the edge of a refrozen crack. For an hour or more
that afternoon we watched this exodus proceeding, and returned to camp,
more than ever convinced that bad weather might be expected. Nor were we
disappointed, for on the next day we woke to a southerly gale and smother
of snow and drift, which effectually prevented any one of us from leaving
our camp at all. This continued without intermission all day and night
till the following morning, when the weather cleared sufficiently to
allow us to reach the edge of the cliff which overlooked the rookery.

[Illustration: THE EMPERORS ROOKERY]

"The change here was immense. Ross Sea was open water for nearly thirty
miles; a long line of white pack ice was just visible on the horizon from
where we stood, some 800 to 900 feet above the sea. Large sheets of ice
were still going out and drifting to the north, and the migration of the
Emperors was in full swing. There were again two companies waiting on
the ice at the actual water's edge, with some hundred more tailing out in
single file to join them. The birds were waiting far out at the edge of
the open water, as far as it was possible for them to walk, on a
projecting piece of ice, the very next piece that would break away and
drift to the north. The line of tracks in the snow along which the birds