chunk: To prevent the crusaders from cutting timber for siege engines, the Muslim sorcerer Ismen protects the forest with enchantments, which defeat the Christian knights, even Tancredi (Canto 13). Eventually the enchantments are broken by Rinaldo, and the siege engines built (Canto 18).
  Another maiden of the region, the Princess Erminia (or "Hermine") of Antioch, also falls in love with Tancredi and betrays her people to help him, but she grows jealous when she learns that Tancredi loves Clorinda. One night she steals Clorinda's armor and leaves the city, in an attempt to find Tancredi, but she is attacked by Christian soldiers (who mistake her for Clorinda) and she flees into the forest, where she is cared for by a family of shepherds, with an old man who weaves baskets (Cantos 6-7).