The Watchtower of Thapnen is a tower in the Lomarian city of Olathoë in the Dreamlands. The purpose of the tower is to guard the narrow pass that comes up from behind Mount Noton, providing a defense against potential invaders that would use the pass to launch a surprise attack against Olathoë. In such a case, a signal fire would be lit at the top of the tower to warn the soldiers and thereby save the city from immediate disaster. (HPL: "Polaris")
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Watchtower of Thapnen
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