I slept on it and I think I may still include this last piece in Schiehallion. I never had a name for this island beyond The Mad Lands. I know, it sucks. It was a minor part of the story that I'm not sure if I'll use or not.
Here it is:
Anyway, whether I keep this as The Mad Lands or not is what has me stumped. I could see how it goes keeping with the idea that it's this cradle of blight. Or I may make it the homeland of the reptilian Thissians and bring them in from another world - Vastmorlund - the same world of the Armans, Sumaka, Mantu, and Torongo. I'll have to give it some thought. Vastmorlund was never a favorite of mine, just a happenstance that came with practice.