One of the criteria that the Captain had for the HQ was that it have more than 1 layer of defense. The tower is part of that, and runs on its own schedule, independent of the rest of the defenses.
There are 9 soldiers who man the tower, taking the watch in turns of three, and they stay on duty in the tower for a week at a time. During that week, they dont leave the tower, or even unbar the door. Food and supplies are brought in once a week during the shift change, and the rest of the time, the tower is sealed.
Would you like to check out the gatehouse while were on the wall, or would you like to go back to the courtyard?
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