endless difficulties, for it would have entailed the risks of sledge
travelling in mid-winter with an almost total absence of light. It would
at any time require that a party of three at least, with full camp
equipment, should traverse about a hundred miles of the Barrier surface
in the dark and should, by moonlight, cross over with rope and axe the
immense pressure ridges which form a chaos of crevasses at Cape Crozier.
These ridges, moreover, which have taken a party as much as two hours of
careful work to cross by daylight, must be crossed and re-crossed at
every visit to the breeding site in the bay. There is no possibility even
by daylight of conveying over them the sledge or camping kit, and in the
darkness of mid-winter the impracticability is still more obvious. Cape
Crozier is a focus for wind and storm, where every breath is converted,
by the configuration of Mounts Erebus and Terror, into a regular drifting
blizzard full of snow. It is here, as I have already stated, that on one
journey or another we have had to lie patiently in sodden sleeping-bags
for as many as five and seven days on end, waiting for the weather to
change and make it possible for us to leave our tents at all. If,
however, these dangers were overcome there would still be the difficulty
of making the needful preparations from the eggs. The party would have to
be on the scene at any rate early in July. Supposing that no eggs were
found upon arrival, it would be well to spend the time in labelling the
most likely birds, those for example that have taken up their stations
close underneath the ice-cliffs. And if this were done it would be easier
then to examine them daily by moonlight, if it and the weather generally
were suitable: conditions, I must confess, not always easily obtained at
Cape Crozier. But if by good luck things happened to go well, it would by
this time be useful to have a shelter built of snow blocks on the sea-ice
in which to work with the cooking lamp to prevent the freezing of the egg
before the embryo was cut out, and in order that fluid solutions might
be handy for the various stages of its preparation; for it must be borne