Events in History
- General B. Butler orders William Mumford hanged after he removed and destroyed US flag on display over New Orleans Mint
- Skirmish at Union Church, Virginia (Peninsular)
- The United States and Britain agree to suppress the slave trade
Birthdays in History
- Philipp Lenard, Austrian physicist (Nobel 1905), born in Pozsony, Austria-Hungary (d. 1947)
Deaths in History
- William B. Mumford, 1st US citizen hanged for treason, at 42