Captain Calles used to sail the seas in his ship, attacking and sinking merchant ships in order to steal their treasure. However, this only resulted in the merchants and the navy trying to track him down to get the treasure back. In order to get away, Calles sailed his ship into a cavern located between Arlesburgh and Harwick, and buried his treasure there. He later drew up a map so that he could come back and find the treasure, but it was apparently blown overboard.