An 1873 law required which Latin motto to appear on U.S. coins?

Which author's 1870 novel mentions Moby Dick as well as a sea monster called a kraken? An 1870s novel about greed and corruption gave which "gold-covered" name to an era of U.S. history? Which Italian-born king of Spain abdicated in 1873, about a year after a Carlist revolt broke out? Which poem from Lewis Carroll's "Through the Looking-Glass" includes the line "The time has come to talk of many things… An 1876 bank robbery attempt is reenacted during "Defeat of Jesse James Days" in Northfield, in which state? Which word names an 1876 battle in Montana Territory and is the dying word in "Citizen Kane"? An 1877 exhibition moved critic John Ruskin to write the remarks that led to which American-born artist's libel suit? An 1877 reception for a Russian grand duke was reportedly the only time which first lady allowed alcohol at a state fun…