Final answer:
The provided excerpts from Mark Twain’s 'Life on the Mississippi' do not describe how the captain treats Twain after his attack on Brown; they focus on his training as a riverboat pilot with Mr. Bixby.
Step-by-step explanation:
In Mark Twain's memoir Life on the Mississippi, the treatment of Twain by the captain after Twain's attack on Brown is not explicitly detailed in the passages provided. The excerpts focus on Twain’s training to become a riverboat pilot and his experiences with Mr. Bixby, rather than an incident involving a conflict with someone named Brown. Twain describes his journey of becoming a competent pilot under Bixby's guidance, showcasing his own growth and the complexities of navigating the Mississippi River. To understand how the captain treats Twain after the attack on Brown, one would have to refer to a different part of Twain’s memoir, which is not included in the provided information.