You'll note the Missouri Battle Flag, or Price's Flag, above Joseph. Not sure exactly what flag he went under, but he was a part of Price's Raid in late 1864. At any rate, it is known as the Missouri Battle Flag. So it works. Maybe, Mr. Jim McGhee, you can comment further on this...
In this picture, you can see the grain of the myrtlewood under neath. The piece is a mixed media, done with India Ink and acrylic paints. It is kinda in between a sketch and a painting. I can do these fairly quick (it took about 8 hours to do). A full painting or drawing takes a long time. I get bored with that. Most folks get the gist from a simpler piece anyhow. So the extra effort is wasted in my opinion.