The siege of Port Arthur in 1904–1905 was a major episode of which war?

In which 1903 Jack London novel does a dog who is half St. Bernard and half Scotch shepherd survive in the Yukon wilder… The 1903 Supreme Court case Lone Wolf v. Hitchcock gave Congress broad power over the lands of which peoples? "The Old Guitarist" is a classic painting from which Spanish artist's Blue Period? The 1903 Treaty of Petrópolis, in which Bolivia gave the Acre region to Brazil, settled a dispute over an area rich in… Who was the Socialist Party's presidential candidate in 1904, 1908, 1912 and 1920? Empress Alexandra Feodorovna was married to which ruler? Complete the title of O. Henry's 1904 book: "___ and Kings". Which 1904 British play includes the line "To die will be an awfully big adventure"?