The first of these was famously sent on May 24, 1844, and Western Union sent its last one on January 27, 2006. What are they?

A famous landscape painted around 1595 by El Greco shows a view of which Spanish city? Which famous dance partner was born Virginia Katherine McMath? Which famous D.C. address was the title of a 1976 Lerner and Bernstein musical that flopped? A famous group of blacklisted screenwriters and directors of the 1950s was known as the Hollywood what? A famous scene from which 1976 film was ad-libbed, as the script simply read "Travis looks in the mirror"? The famous symbol of the Pinkerton Detective Agency is an eye with the slogan "We never..." what? The Marquise de Montespan became the mistress of which French king around 1667? "A Farewell to Arms" and Robert Graves's "Good-Bye to All That" are about which war?