SOUTH 
diameter clear above the western horizon. He hailed Crean, 
who from a position on the floe 90 ft. below the crow's-nest 
also saw the re-born sim. A quarter of an hour later from 
the deck Worsley saw the sun set a second time. This strange 
phenomenon was due to mirage or refraction. We attributed 
it to an ice-crack to the westward, where the band of open 
water had heated a stratum of air. 
The drift of the pack was not constant, and during the 
succeeding days the crevassed berg alternately advanced and 
receded as the Endurance moved with the floe. On Sunday, 
April 18, it was only seven miles distant from the ship. It is 
a large berg, about three-quarters of a mile long on the side 
presented to us and probably well over 200 ft. high. It is 
heavily crevassed, as though it once formed the serac portion 
of a glacier. Two specially wide and deep chasms across it 
from south-east to north-west give it the appearance of having 
broken its back on the shoal-ground. Huge masses of pressure- 
ice are piled against its cliffs to a height of about 60 ft., showing 
the stupendous force that is being brought to bear upon it 
by the drifting pack. The berg must be very firmly aground. 
We swing the arrow on the current-meter frequently and watch 
with keen attention to see where it will come to rest. Will it 
point straight for the berg, showing that our drift is in that 
direction ? It swings slowly round. It points to the north- 
east end of the berg, then shifts slowly to the centre and seems 
to stop ; but it moves again and swings 20 degrees clear of our 
enemy to the south-west. . . . We notice that two familiar 
bergs, the Rampart Berg and the Peak Berg, have moved 
away from the ship. Probably they also have grounded or 
dragged on the shoal." A strong drift to the westward during 
the night of the 18th relieved our anxiety by carrying the 
Endurance to the lee of the crevassed berg, which passed out 
of our range of vision before the end of the month. 
We said good-bye to the sun on May 1 and entered the 
period of twilight that would be followed by the darkness of 
midwinter. Tlie sun by the aid of refraction just cleared the 
horizon at noon and set shortly before 2 p.m. A fine aurora 
in the evening was dimmed by the fidl moon, which had risen 
46 
