## The Night the Ice Split
Ernest Holness was asleep on February 9, 1916, when the floe cracked beneath him.
The crack ran directly under his sleeping bag. One moment the ice was solid ground; the next, it was two pieces moving apart, and Holness and his bag were in the water between them.
The water temperature at that latitude in February is approximately minus 1.8 degrees Celsius — the freezing point of salt water, which is slightly below the freezing point of fresh water. A human body loses heat to water at a rate approximately twenty-five times faster than to air at the same temperature. In water at minus 1.8 degrees, unconsciousness from cold shock can occur within minutes.
Shackleton was close enough to see it happen. He reached Holness and pulled him out of the water before the man had time to go under a second time. The sleeping bag, waterlogged and lost, sank.
This is documented in the accounts as a close call — “very nearly a serious loss,” in the language of the time — and it is the most direct evidence in the record of how close the expedition came to losing someone during the ice drift. It is also evidence of what Shackleton’s habit of moving continuously through the camp and maintaining his own watch made possible: he was in the right place, at night, in terrible conditions, to see what happened and respond before it became fatal.
The distinction between an outcome that kills one person and an outcome that doesn’t is, very often, a matter of seconds and proximity. Holness survived because Shackleton was there. Whether Shackleton was there because of disciplined practice, good habits, or straightforward luck is something the accounts do not definitively resolve. Probably all three.