July 1. Ottawa becomes the capital, and John A. Macdonald becomes the Dominion's first prime minister. March 30 – Alaska Purchase: Alaska is purchased for $7.2 million from Alexander II of Russia, about 2 cents/acre ($4.19/km2), by United States Secretary of State William H. Seward. Newspapers call this Seward's Folly. April–June April 1 – The Strait Settlement of Singapore, formerly ruled from Calcutta, becomes a Crown colony, under the jurisdiction of the Colonial Office in London. April 1–November 3 – Exposition Universelle, an international exhibition in Paris. Among the visitors is Abdülaziz, making the first visit of a Sultan of the Ottoman Empire to Western Europe. April 28 – I.C. Sorosis, the first women's fraternity (sorority) founded upon the men's fraternity model, with Pi Beta Phi as its motto, is founded at Monmouth College in Monmouth, Illinois. In 1888, the motto becomes the name of the organization. May 1 – The first political May Day march takes place in Chicago. May 7 – Alfred Nobel patents dynamite in the United Kingdom. May 11 Treaty of London: The great powers of Europe reaffirm the neutrality of Luxembourg, ending the Luxembourg Crisis. The Duchy of Limburg is formally re-incorporated into the Kingdom of the Netherlands. Cox and Box, by Francis Burnand and Arthur Sullivan, is first publicly performed, at the Adelphi Theatre, London. May 24 – Robert William Keate becomes Lieutenant-governor of the Colony of Natal. May 29 The Austro-Hungarian Compromise (called Ausgleich in German or kiegyezés in Hungarian (The Compromise)) is born through Act 12, which establishes the Austro-Hungarian Empire; on June 8 Emperor Francis Joseph of Austria is crowned King of Hungary. Canadian Confederation: Queen Victoria signs the British North America Act, creating the Dominion of Canada, effective July 1. June 15 – The Atlantic Cable Quartz Lode gold mine is named in Montana. June 19 – A firing squad executes Emperor Maximilian of Mexico and two of his lieutenants. June 20 – The first recorded association football match in Argentina took place in Buenos Aires. July–September July – The Reverend Thomas Baker, a Wesleyan Methodist missionary (b. in Playden, East Sussex, England) is cooked and eaten by Navatusila tribespeople at Nabutautau, Fiji, together with eight of his local followers, the last missionary in that country to suffer cannibalism. July 1 Canadian Confederation: The British North America Act of 29 March comes into force, creating the Dominion of Canada, the