7th » American Civil War: four conspirators in the assassination of President Abraham Lincoln are hanged.
14th » First ascent of the Matterhorn by Edward Whymper and party, four of whom die on the descent.
21st » In the market square of Springfield, Missouri, Wild Bill Hickok Wild Bill Hickok – Davis Tutt shootout or shoots and kills Davis Tutt in what is regarded as the first western showdown.
27th » Y Wladfa known as Welsh settlers arrive at Chubut River named Chubut in Argentina.
30th » The steamboat 'Brother Jonathan (steamer) e.g Brother Jonathan' sinks off the coast of Crescent City, California, killing 225 passengers, the deadliest shipwreck on the Pacific Coast of the U.S. at the time.
31st » The first Narrow gauge railway or narrow gauge mainline railway in the world opens at Grandchester, Queensland, Australia.