Hi,

I have been trying to find these two runes for over an hour now. I just finished the mission where I killed the High Overseer, and I got back to the safe house place. After I woke up, I equipped the heart and now it seems that there is two runes under the rocks, about 5 meters apart. I can't find any way to get in there! I also used the vision where you can see through things and there are two people coughing down there. Is there a house that has been barricaded off? If so, where do I get the key to it?

*UPDATE*

I found a little square thing on the ground nearby, but it won't open when I press F or when I whack it with my sword, and I also tried throwing two grenades at it.

Just do the little storyline in the pub, it will bring you right where you want to go.

Ok, thank you!

Yes, after you wake up you should be prompted to find Havelock, who will want you to investigate the sewers where suspicious
noises were heard. That's the hatch in the ground you're talking about. Havelock gives you the sewer keys and down you go.

Those 2 people are weepers, and after you deal with them how you see fit, investigate the remainder of the sewers to locate
the 2 runes.

If you want an alternative way: Turn into a fish and swim through the flood gate on the side of the hill.