I don't think Rockwell's been sleeping much. I awoke last night to find him studying a strange piece of metal by firelight. I guess some tribe gave it to him as a gift, along with a very familiar looking artifact.
I insisted that we show those items to Wali, and she recognized them as the property of this station's lone guardian. With all that she knows, I'm not surprised that she's activated the obelisks before. Hell, it sounds like the old battle ax has even slain the beast herself!
Since we have said guardian's artifact, Wali says that we can leave this station at any time. I suppose we may as well. Rockwell's eager to depart, and as much as I like Wali, I've had my fill of sand.