Hi, I've completed the main part of this map, but at the end father appears very briefly with a clue about how to find Hera's Key. The screen moved back to Diggy before I could read his clue ".... you may find a way north of the sculptor's house ......." is all I could read before he disappeared. I see that there should be a mossy stone area with a math puzzle, but how do I get to that area please?