“The sloop continued labouring and rocking, as if she would have rolled her mast overboard. She seemed in continual danger either of upsetting or of running on shore. In this way she drove quite through the highlands, until she had passed Pollopol’s Island, where, it is said, the jurisdiction of the Dunderberg potentate ceases.” -The Storm-Ship, by Washington Irving Bannerman Castle, one of the Hudson Valley’s most prominent ruins, sits like a sentinel at the North Gate to the Hudson Highlands. In Washington Irving’s short story “The Storm-Ship”, this small island marks the northern end of the domain of The Heer of Dunderberg, a Dutch goblin king who vexed many a sailing…