All the Map Pieces in One Place

I should listen to the story of Dark Lord, one of the four sages, in Kerning City of Victoria Island. I obtained the Old Map Piece (4/4) from the four sages in Victoria Island, and this map supposedly locates where The Book of Ancient is currently hidden. I should get back to Alcaster now. If it's Alcaster, he will surely know what to do with the Old Map Piece (4/4).

Part of: In Search of the Book of Ancient