Lucas becomes involved in a battle between an aspiring writer recently fired as cook for a trail outfit and a cocky, bragging trail hand who finds it fun to whip up on those weaker then himself.
From "The Rifleman Episode Guide List"
George Collins was an aspiring writer whose family hailed from back East. By "back East", it could be that he was from Maine, where his family founded the town of Collinsport.
If so, he may have seen this painting in his family's ancestral home of Collinwood.....