In Utira Library, there's a book called "Gaea Town", in the first western room of the library. It reads:
"Gaea Town is a small town in the north-western corner of the region. It's comparatively small, but has a variety of facilities that are available to trainers, such as a "Battle Mansion" and a "Battle Guild". Notably, the First Augur was also born in Gaea Town, and (before his disappearance) ran a Dark-Type themed Gym before his disappearance."
It says he disappeared two times (I have bolded the issue).