Thinking ahead...

Worsley's Endurance...

"

Within the ship, to counteract the depression caused by darkness, we had a particularly brilliant scheme of lighting, to which much of our cheerfulness may have been due."

...At that time such dim, storm-laden daylight as we did get lasted at the most one-fourth of the twenty-four hours. For the rest of the time the darkness was complete. ...

To keep up the spirits of the men Shackleton now worked as I had never seen him work before. Each day conditions seemed to grow a little worse."