Complex sentence: It is said in the story that Erendis finally longed for Aldarion enough to overcome her bitterness, and she travelled to a haven where he was expected to return, but all Tolkien writes is that she died there in the water.
Split into simpler sentences: It is said in the story that Erendis finally longed for Aldarion enough to overcome her bitterness, and she travelled to a haven where he was expected to return. All Tolkien writes of her then, though, is that she died there in the water.