Where are the other Infusion Seers?

I know the one in Iron Mines or whichever mission it was, but I hear there are 2 more? Can anyone point me to the location, thanks

Mineral Springs: In the Cave, far North-East corner.

Abaddon's Mouth: In the outer islands, South-West of the fort.

In the eastern end of Mineral Springs there is a seer.

Iron Mines (Duh)
Ring of Fire (It's the bonus)
Abbadon's Mouth (Back entrance past bonus island)
Mineral Springs (Cave with Statue of Lyssa)