I always assumed that, too, Jaygee. It seemed like all the Pevensies' gifts were magical except for Lucy's dagger and Peter's shield, since they seem rather forgotten in the later books (which always bothered me, ugh). So why not Susan's quiver?
Tirian is super, super
homesick right now. But by golly, we're flying out tomorrow and I'll be home again, if only for a week and a half. Maybe while we're there my silly homing instinct will let me sleep normally at night instead of waking me up by messing with my dreams.
I love my homing instinct, but it has been a bit troublesome lately.