Love that you found that piece of the puzzle
The maps in the stones from the beach lead to the cave, where the final descriptions are made with the maps on the stones there.
The buried rocks are maps to the final locations when you "Reunion" in France.
This being a sequence that is followed by:
1) Finding the Cipher in Mahe
2) Finding the Beach Carvings
3) Finding the Cave and Buried Rock Maps
4) Finding the location of the final maps in France
Each one of these relates to something that is found near the coast of Brest, in Levasseur's home country.
http://www.treasurenet.com/forums/t...aoulas-exposes-missing-1-2-levasseur-map.html