What is the main conflict in Mark Twain's Letters from Hawaii by Mark Twain?

Mark Twain writes a series of travel letters from Hawaii, intended for publication in the Sacramento Daily Union. Each chapter corresponds to a single letter written by Mr. Twain between the months of April and November of the year 1866. The first three chapters cover Twain's turbulent voyage to Hawaii, where much of the crew becomes seasick and where the author rails against Balboa for naming the uncooperative ocean "Pacific."