Tremors announced an extended period of volcanic activity on and near the Greek Island of Santorini, one of the Cyclades.  Over the next month, explosions were heard, buildings were damaged, small eruptions plagued the area, sea water temperatures were raised, and most remarkably, during February a small island emerged just off the coast of the island, later to fall back into the Aegean.  (By John Osborne) 

A massive fire touched off by a gas explosion destroyed Pike's Opera House in Cincinnati, Ohio, along with surrounding buildings along Fourth Street in the city.  Luckily, the explosion happened at around eleven in the evening, well after a crowded performance of "Midsummer Night's Dream" had ended and so, despite the destruction, no serious injuries were reported.  The damage was extensive, however, and was estimated to have cost businesses around 1.5 million dollars. (By John Osborne). 

In one of the most gruesome mass murders in Philadelphia history, Anton Probst, a Union veteran employed as a farm hand at the Deering Farm on James Lane in Point Breeze, then on the southern outskirts of the city, murdered the entire Deering family one by one, seven people in all, on April 7, 1866. After his arrest on April 13, 1866, Probst confessed to the crime and a Philadelphia court had sentenced him to death on May 16, 1866.  (By John Osborne) 

In one of the most gruesome mass murders in Philadelphia history, Anton Probst, a Union veteran employed as a farm hand at the Deering Farm on James Lane in Point Breeze, then on the southern outskirts of the city, murdered the entire Deering family one by one, seven people in all, on April 7, 1866. After his arrest, Probst confessed to the crime and a Philadelphia court sentenced him to death this day. He was executed on June 8, 1866.  (By John Osborne) 

In one of the most gruesome mass murders in Philadelphia history, Anton Probst, a Union veteran employed as a farm hand at the Deering Farm in James Lane in Point Breeze, then on the southern outskirts of the city, murdered the entire Deering family one by one, seven people in all, the previous Saturday. After his arrest, Probst confessed to the crime, was tried the following month and executed on June 8, 1866.  (By John Osborne) 

One of the most gruesome mass murders ever seen in Philadelphia took place over the course of this day when Anton Probst, a Union veteran employed as a hand at the Deering Farm in James Lane in Point Breeze, then on the southern edge of the city, killed the entire Deering family one by one, seven people in all.  Probst was arrested a week later and confessed to the crime.  He was tried the following month and executed on June 8, 1866.  (By John Osborne) 

The largely German-American Hoboken Riding Club celebrated its fifteenth anniversary with its annual horse riding display at the Hexamer and Walter Riding School in Hoboken.  A main attraction was an exhibition, reportedly for the first time in the United States, of "Jeu de Barre," a contest in which riders attempt to strip ribbons from their opponent's shoulders without losing their own. (By John Osborne)

In a match-up described as the final of the American National Championship, held at the the Cooper Union Institute, New Yorker John Deery defeated John McDevitt, before a large crowd.  (By John Osborne)