@Makenai While it's absolutely hypocritical to say, I still think that nobody knows what brings the next day, even in situations like this. Maybe I've watched cast away to much. I'll be rooting for you.
@APlusPeace It's probably a reference to a painting "The Ambassadors" by Hans Holbein. The same skull can be seen from a certain perspective there. The chapter's title also seems to suggest that.
Here it is.