I am not aware of the story 'The Sand Reckoner'
Therefore, the question 'How do Marcus's words about needing to disembark contribute to the plot of The Sand Reckoner', means that there was a boat in the story of something similar to it.
Therefore, the character Marcus says that the other characters have to leave (disembark) the boat or the something similar to it.
Therefore how does this seem to change or help the plot in the story.
I hope this helped - Maria S.
In the start of the book, disappointed with the alert and restriction practiced by the two men, Jethro analyzes his dad to Abe Lincoln. Jethro's sister Mary has as of late passed on because of the carelessness of Travis Burdow, and when a furious swarm composes to chase down the young fellow and hang him for his wrongdoing, Jethro's dad Matt Creighton intercedes, asking the men "to keep their hands free of further carnage". Despite the fact that the casualty of Burdow's inebriated activities is his own little girl, Matt Creighton is a well behaved, empathetic man, and he can beat his own particular outrage and sadness to maintain the peace as it concerns Mary's executioner.