Does Arabella Drummond have a treasure map?

I recently solved the case. Unless someone has already found it, it is on the Indonesian island of Krakatoa. the map reads as follows. ( lowercase is added in for grammar.)

MY TREASURE IS BURIED IN the NWcorner OF THE ISLAND NEAR THE OLD LAVA FLOW. WALK TWENTY PACES NW FROM THE BLACKENED TREE. THE CHEST IS NINE FEET BELOW. AD

AD stands for Arabella Drummond. Read the book pirateology!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!