This chapter is almost entirely an excerpt from the book The Vigilantes of Montana by Prof. Thos. J. Dimsdale, as cited by Mark Twain. Twain does offer an interesting speculation on the nature of courage, at the end of the chapter.
Roughing It - Chapter 11
The Division Superintendent becomes too much for the general population. He is arrested, tried and executed. Mark speculates on the nature of courage in light of the manner of Slade's execution. His pleading for mercy appears as a contradiction to previously displayed courage.