What conclusion can be drawn from the text? "a decade"

yes, they are. i think.

i believe that dan is so anxious because he dose not know what awaits him when he gets there. but i dont know to be honest

do you have a picture of the cartoon?

mark twain, real name samuel langhorne clemens, was an american writer, humorist, entrepreneur, publisher, and lecturer. among his novels are the adventures of tom sawyer and its sequel, the adventures of huckleberry finn, the latter often called "the great american novel". wikipedia