Impress your Valentine with your knowledge of the history of Valentine’s Day, especially in the U.S., 1840-1870!
How, and how much? Simple, and it is free! Just take a look at Matthew Wills’ summary at JSTOR Daily of Leigh Eric Schmidt’s study of the holiday. You can find Wills’ summary, and links to Schmidt’s article, here: The origins of St. Valentine’s Day | JSTOR Daily.