"Good then. Love to baffle a few archaeologists." Traveling back to see the things that they studied did make the subject a little bit more amusing to her, after all. She reached out to touch the rock face after he etched into it, curious to see if it warmed the rock at all--given that she still didn't have a complete grip on how the sonic worked, so such things did interest her from time to time.
"What are we gonna do, add little arrows? Or mark at intervals and junctions to make sure we don't go in circles or take the wrong paths back?" Since they obviously weren't just going to key the wall.