The Third Pocket Guide to the Empire said that Skyrim still held Jehanna, Elinhir and part of Dragonstar. Do you think that included the Western Reach and what do you think happened in the 4th Era? The current Orsinium must be in this area and the Orcs must have taken the land's political status into account when they rebuilt there.

Considering the turmoil within 4th Era Skyrim, I highly doubt that Skyrim or even Nordic Jarls have any claims to those provinces now. I imagine there is a fair amount of Nord people and culture in these areas while the regions themselves belong to Hammerfell and High Rock, respectively. Im only saying this because we heard nothing about these cities in SKYRIM, and if they were still owned by them then I would assume we would hear something.