New Haven was home to one of the important early events in the burgeoning anti-slavery movement when, in 1839, the trial of mutineering Mende tribesmen being transported as slaves on the Spanish slaveship Amistad was held in New Haven's United States District Court. There is a statue of Joseph Cinqué, the informal leader of the slaves, beside City Hall. See "Museums" below for more information. Abraham Lincoln delivered a speech on slavery in New Haven in 1860, shortly before he secured the Republican nomination for President.

In what year did an important trial take place which situated New Haven among the forefront of the growing anti-slavery movement?