Experience they say was the best teacher. Indeed it had taught them a viable lesson of how not to leave your security in the hands of just one person.
"We should guard in two. This way, we have more mouths to inform us if there is any problem" Reid suggested. Their last long rest was cut short prematurely because their watchman was knocked out before he could even say the word 'run'. This time it was better they doubled the number just incase history tried to repeat itself for the third time.