During the South Polar expedition, Sir Edgeworth’s assistant, Douglas Mawson, was working in his tent one day when he heard a muffled cry from outside. “Are you very busy?” called the voice, which Mawson recognized as that of Sir Edgeworth.
“Yes I am,” he replied. “What’s the matter?”
“Are you really very busy?”
“Yes,” snapped Mawson, losing his patience. “What is it you want?”
After a moment’s silence, David replied apologetically, “Well, I’m down a crevasse, and I don’t think I can hang on much longer.”