I can't tell if he's apologizing for being concerned, or if these two statements stand on their own independently, and he is apologizing for going into Helheim on his own.

"What if I had not been informed in time to get to you?" My voice is still soft now, less accusatory, more concerned. "What if you had been rendered unconscious in Helheim without anyone's knowledge?"

He could have died. And we would have lost out best scientist.

I would have lost my old friend.