Halls of the West is a location added by mod The Gray Cowl of Nocturnal.
It is one of the many locations from which Dragonborn has to pass to acquire The Gray Cowl in the quest The Call of Gray Cowl of Nocturnal.
Boots of Springheel Jak and Caio's Journal Vol. 6 for quest Memories of Umbranox can be found here.
Halls of the West - Interior