Which 1850s song, sung by Confederate troops, became a No. 1 hit for Mitch Miller in 1955?

What is a concluding section added to a literary work, often revealing what later became of the characters? A Concord, New Hampshire, firm built which vehicles, whose fast drivers were nicknamed "jehus"? A condensed version of which author's "Roots" appeared in Reader's Digest in 1974? Who wrote the novel "A Confederacy of Dunces"? Which Missouri congressman, who served from 1977 to 2005, was known for his firm opposition to NAFTA? What is the console of keys on a piano or typewriter called? Which physicist, who in 1900 postulated that energy is radiated in quanta, has a fundamental constant named for him? Which 9-letter constellation, named for a chained princess of Greek myth, begins and ends with the letter A?