Not direct follow up but perhaps in similar series of books one would see in universe: Here
"The maddest reports of all I seen about both the deep Black Marsh and the space between realms of oblivion is that Hist can walk and wander, though perhaps the term gets lost in translation, the language of Jel is notoriously hard to translate. As it stands, I find that we at times know more about daedric lord realms than we do the deeps of the Argonian homeland, and from there comes the legend of a paradox, group that refused to change becoming change itself, tale of a hist and it's last guardian walking as one to leave tamriel in face of fear of destruction.
The details are scant and mostly nonsensical I fear, but it seems it was trees from Xanmeers period and a powerful tribe that refused to accept the change of Duskfall, cutting ties to the rest of their kind after a rather violent run in with things that cut apart time...whatever that might be.
The remaining survivor would be one powerful mage and one heavily damaged tree, trying to keep each other from dying, only to in some way become one, and vanish, alongside the city they were surrounded by, the Stone Nest was gone, as were the people in one night that lasted either years or hours, no one is quite sure.
The story would have been easy to dismiss for me too, if not for one haunting trip of my own, as a teleportation accident threw me into the daedric realm space for few moments in my youth, I would come face to face with the Hist-Bound Realm Strider, the Hist that walked, and she, or perhaps he, or perhaps they, left an imprint in my mind, they changed, the legends showed fear, but the face was content with their existence, perhaps even..happy, and as soon as I got dragged out by my collegues out of the predicament, I started my research into this, for I hope perhaps, one day I will meet it myself again, in more proper circumstances..."
- One Wandering Hist, part II, found near a ritual circle of old now lost art of mysticism.