A massive public meeting with an unprecedented 100,000 people in attendance gathered in New York City's Union Square to demonstrate support of the Union and a determination to put down the rebellion of the seceding states.  Several members of the Fort Sumter garrison were in introduced to the crowd and dozens of patriotic speeches were made from stands erected around the square.  (By John Osborne) 

With referee Fatty Welch calling the well-known fighters Ned Touhey and Owen Geighan to the center of the ring, New York Harbor Police arrived just in time to prevent an illegal boxing match organized in secret at the small village of New Brighton on Staten Island.  The contest had drawn a crowd of around 150 who had slipped away from New York City overnight.  Twenty-two people were arrested and assessed the customary $3 fine.  (By John Osborne) 

At six p.m. the 105 men of the Ringgold Light Artillery, a Reading, Pennsylvania militia unit, founded in 1850 and named for the Mexican War artillery hero Samuel Ringgold, left their home city by rail.  They arrived in Harrisburg two hours later and were quartered at the Herr Hotel.  They were one of several militia companies Governor Curtin had called to be prepared for action several days before.  These units left for Washington, DC on April 18, 1861, via Baltimore.  (By John Osborne)