Tayoga has done so already.

I'm wondering which of you will get to sleep first.
Whoever does will be the better man, a question I've long wanted to decide." But the problem was still left for the future.

They fell asleep so nearly at the same time that Willet could tell no difference.

He noticed with pleasure their long, regular breathing, and he said to himself, as he had said so often before, that they were two good and brave lads.
Then he made a very comfortable cushion of fallen leaves to sit upon, and remained there a long time, his rifle across his knees.
His eyes were wide open, but no part of his body stirred.

He had acquired the gift of infinite patience, and with it the difficult physical art of remaining absolutely motionless for a long time.