There is a hint, emphasis mine:
Day 2 eventDay 2 event
cool man: Mr. Fat, did you succeed in defeating Sir Lock? Sure, I think, with all the towns possibilities inside! I hope it so much, because, if you didn't gain victory, your companions will be very sad....
In any case I agree it should be made clearer, either by clear message or quest leading to defeat.
I received a brief message from Biobob concerning Rise of the Sun King. He's interested in updating the map but his free time is very limited.
I asked for general outline of map so that anyone willing can help update and finish the map... will update if I ever get another reply)