Board Thread:Lore Discussion/@comment-12481512-20130717104617/@comment-6881629-20151126120907

Not only was he a Mer but corprus stops aging and other disease. Yagrum was around in the first era and still around at the end of the third, he could be still around in the forth (and you can go back and play Morrowind whenever you want).

Like i say though not only was he very (very) old but corprus attacks the body and mind driving most insane, so he might not be much help.