Thank the gods, you have a potion. I owe you my life. I bet it was that Sandol that poisoned me! I can't go back to mining until I'm safe from him.

Please, %PCName. I need medical attention.

Oh, there's something wrong with me, alright. I've been poisoned! Quick, you need to get me a potion. Jociel can probably buy one for me.

Has he been cured? Hop to it!

Poisoned? Oh, dear. Here, take this gold and go to Mist-Eyes back in Firewatch and buy him a potion. Or use a spell, if you can. Can't have miners dying on the job.

I'm not sure what's wrong with him, exactly, but he's been standing against the wall for a while now. I need him to start mining again. He's on the path back towards the exit, where you came from, standing on his ladder.