Thin wavering black lines close to the northern horizon were probably distant leads refracted into the sky.

Sounds of moderate pressure came to our ears occasionally, but the ship was not involved.

At midnight on the 11th a crack in the lead ahead of the 'Endurance' opened out rapidly, and by 2 a.m.was over 200 yds.

wide in places with an area of open water to the south-west.

Sounds of pressure were heard along this lead, which soon closed to a width of about 30 yds.