What is the exposition on the cub pilot

This part of the plot follows the climax that ties up loose ends: clarifies what happened next. It might be missing or short. Brown is the one who will be put ashore and fired; Twain will stay aboard the Pennsylvania. ... George Richie, the other cub pilot, mocks Twain by pretending to be Brown.

Allusion and illusion. an allusion is an indirect reference, whereas an illusion is something that is unreal or incorrect. each of the nouns has a related verb form: allude “to refer indirectly to,” and illude (not a very common word), which may mean “to delude or deceive” or “to subject to an illusion.”

The meaning of the phrase "thou art wedded to calamity” is same as the sentence: your marriage will be a complete disaster.the message conveyed in the sentence is about marriage as the word "wedded" connotes, and the term "calamity" refers to disaster.