In almost every life there comes a time when a person decides it's better to pretend to know than admit otherwise. Read it, and the next time you're at a party you can hold your head way above the canapes as you explain what e pluribus unum means or who put the Mach in Mach 4. Now she knows better.
Flotsam is stuff lost in a shipwreck.
Jetsam is deliberately tossed overboard to stabilize a ship. Big Ben is not a clock. It is the largest of the clock-tower bells, named after big Ben Hall, the man who oversaw the clock tower's 1859 installation. A decree honoring Ptolemy V Epiphanes. It says the same thing three times, in Greek, hieroglyphics and spoken Egyptian.