More than likely you've found him by now!
However, if you haven't...every game I've played, he always starts out at Nymph Lake (near the Millhouse) and starts strutting up the path from there. If you're on the graveyard side, he takes the "Valeia Bypass" (as I call it) and tracks you down.
Juba Thobers does the same thing...but he spawns in the wooded area just north and west of the "robbers grove" (where the Rogue Leader and his group are).
-Sazerac
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