The main reason why Jessie mistrust Strout, who is nice to him, and trusts Purvis, who’s rough with him is because of the coarse jokes that Purvis made.
This refers to the telling of a story, with the aid of a narrator to show the development of a plot.
Hence, we can see that from the complete text, there is the use of narration to show the crew of a ship and their engagement in the slave trade and the relationship between Jessie and Purvis and Ben Strout, who he does not trust.
There is the use of a crude joke by Purvis made which is meant to be upsetting to Strout in Chapter 3, but he does not take offence, but likes his jovial nature.
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