In Tegerio's "The Ballad Of Adler Young", they block many of the lands of Faerie from other lands.
However, when his ancestral home of Albric Tor was threatened by the Plague of Battles, Roland Sartoriousson, former High Marshal of Faerie, heard the call and left his retirement in Elfhame to join the battle.
He never made it. Sergeant Wing, who was ordered to remain in Elfhame with his wife, heard no more from him.
How he wound up in the section of Lowfolk land called Arizona, he still doesn't know. However, he has settled into his new job as General Manager of Mason Motors quite well. And Matt, Tali and Lowchan, in their other roles, have found having a retired spymaster around very useful indeed... ;-)
One of the perks, of course, is the marvelous cooking of Sharleena Hyena, head of support services for Mason Motors Racing. Sharleena loves to cook, and Roland loves to eat, so it's a match made in heaven...