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  ==Ulthos ==
  The map collection ''The Lands of Ice and Fire'' also shows the north tip of a landmass named "Ulthos" to the south of Essos and east of Sothoryos. Asked whether this was another continent, Martin replied, "Well, it's a large landmass. I am a little unclear on the formal definition of 'continent' as opposed to 'big island.' Also on the size of Ulthos, which after all sits at the edge of the known world. Terra incognita and all that."