- Mar 5 The Britannia Bridge across the Menai Strait between the Isle of Anglesey and the mainland of Wales is opened
Compromise of 1850
Mar 7 Daniel Webster endorses Compromise of 1850, proposed by Henry Clay to settle issues over slavery between states
The Scarlet Letter
Mar 16 Nathaniel Hawthorne's "The Scarlet Letter" published by Ticknor, Reed and Fields in Boston