When the gang is beating up Forbes, Ed pulls his gun to watch over Forbes' son and the hired hand. Several camera shots later, he again pulls his gun to do the same thing.
Just before the gang show up, Brian had poured water over himself to cool down and his pants are all wet. After the gang beats up his father, his pants are dry.
There are no gold mines in Kansas; only a little "flour gold" in some creeks in the western part of the state, washed down from richer deposits in Colorado, and of interest only to the recreational panner. However this story relates to the fraudulent claims of some Kansans during the California Gold Rush, which are a famous, or infamous, chapter in the state's history.