[@Kangutso]

But Mar is currently with the dwarves as a prisoner/guest/treasure/object of curiosity, right? He could conceivably have been sent to this southern outpost for some reason. Maybe for the local geomancers to study? *shrug*

If you don't want to wait very long, I'm sure we could think of a way for you to show up right in the middle of this battle without it making no sense.