Sable Hall
Sable Hall is one of the nineteen castles along the Wall that had been abandoned for centuries by the Night's Watch, left to fall into ruin. In the wake of the battle beneath the Wall and the subsequent decision to allow the free folk through the Wall, Lord Commander Jon Snow faced the urgent problem of where to house thousands of wildlings while also strengthening the Watch's thin defenses. Sable Hall was one of the castles he selected to be re-garrisoned as part of this plan.
Location and Condition
Sable Hall was one of the forts that had stood empty and neglected for so long that it had become a ruin, like most of the castles along the Wall. When Jon Snow began his program of reoccupation, only three of the nineteen forts—Castle Black, the Shadow Tower, and Eastwatch-by-the-Sea—were still manned. The rest, including Sable Hall, were in a sorry state, requiring extensive restoration before they could be made habitable. Jon intended to open three more forts: Deep Lake, Sable Hall, and the Long Barrow.
Garrison and Purpose
Jon Snow's plan for Sable Hall was to garrison it entirely with free folk, under the command of a Night's Watch officer and a chief steward. This was a deliberate strategy to separate the wildlings into manageable groups and to prevent the kind of friction that had already erupted at Castle Black, where tensions between the black brothers and the free folk had led to violence. The Long Barrow was to be garrisoned with women only, aside from its commander and steward, while Sable Hall and Deep Lake would house other groups of wildlings. Jon hoped that by scattering the free folk among the abandoned castles, he could reduce the risk of conflict and make it harder for them to coordinate any rebellion.
Command and Significance
Jon Snow initially considered giving the command of Sable Hall to the Magnar of Thenn, Sigorn, but decided against it because he did not trust him. Sigorn blamed Jon for his father's death and was bred to give orders, not to take them. Instead, Jon planned to appoint his own officers to command the free folk garrisons. The reoccupation of Sable Hall was part of Jon's broader, controversial policy of admitting the wildlings through the Wall and integrating them into the defense of the realm, a policy that ultimately led to his assassination by his own brothers. Sable Hall thus represents both Jon's strategic vision and the deep divisions his decisions created within the Night's Watch.