1835-1910 19thcentury american authors biography correspondence criticismandinterpretationtwain descriptionandtravel doublesinliterature historyandcriticism humorists humorousstories identity(psychology)inliterature impostorsandimpostureinliterature inliterature journalismtwain knowledge mark nationalcharacteristics psychoanalysisandliterature psychologicalfiction splitselfinliterature traveltwain twain