Can someone give the exact quote when Sherburn is using invective language as he rants about how southerners are cowards?

It is actually a pretty long rant. Here is part of it:

"You didn't want to come. The average man don't like trouble and danger. YOU don't like trouble and danger. But if only HALF a man -- like Buck Harkness, there -- shouts 'Lynch him! lynch him!' you're afraid to back down -- afraid you'll be found out to be what you are -- COWARDS -- and so you raise a yell, and hang yourselves on to that half-a-man's coat-tail...."