: for the record, i would like to know if we can assume
: thet the calleach lived where the dire marshes are now
: and if we can add it to the legends and lore?
No, because while it may be clear, we also know that the cath Bruig used Pheonix emblems, and for those who defy Myth III, there was a similar emblem on Alrics door in the Myth II Intro Movie. Though I do agree that there was, at least a major battle there, more than likely a callieach fortress, though I'd say their civilisation spread South off the map, though it is safe to assume that some of them lived there, but not canonically fact.
-zeph