March 20
141 – 6th recorded perihelion passage of Halley’s Comet 1345 – Saturn/Jupiter/Mars-conjunction: thought to be the cause of plague epidemic 1760 – Great Fire of Boston destroys 349 buildings 1815 – Napoleon enters Paris after escape from Elba, begins 100-day rule 1852 – Harriet Beecher Stowe’s “Uncle Tom’s Cabin” published 1861 – An earthquake completely...