Where is Carl?
 

I have been all over the first Island, but I can't find Carl to finish the Quest.:(.
I saw one entry earlier that said he's on Griffon Island, but not only is he not there (at least as far as I can see!) but I can't ever find this clue again!
I cannot find him anywhere, even though I'm sure I was given the quest on the first island.
Any help would be much appreciated.

Carl, the brother of the king? He is on the main land of Arlania...

Not far from the crashed derigible.