It really was, under normal circumstances. Luz was happy to be in the spot where she could walk and talk normally, but of course Vira was not in that same area, so Luz had to go out to her. So Luz tried to mime what she was saying, then looked exasperated and just jerked her head to the surface.

They could get the chest out with their combined strength, that was enough.

Luz did NOT know that about jet ink, but might have suggested a glyph had she been thinking about it.