Outlaw Land — Bradford Scott

"Ghosts range -- fearsome figures in gleaming armor, spirits of the conquistadores -- are striking terror into the herdsmen of Texas' Matagorda Bay country.... But maybe, a skeptical Slade told himself, they're not ghosts -- just smart owlhoots wrapped in tin plate.... So the Ranger ace went ""ghost""-hunting -- with hot lead and fighting fury! But Slade didn't know how close he himself would come to being made a ghost...."