Why is Henry Morton Stanley’s greeting to David Livingstone famous?

The greeting "Dr. Livingstone, I presume?" is famous because it marked the dramatic moment in 1871 when Henry Morton Stanley, a correspondent for the New York Herald, successfully located the Scottish explorer David Livingstone at Ujiji on the eastern shore of Lake Tanganyika.12

At the time, Livingstone had been missing for several years while searching for the source of the Nile, and search parties had been dispatched to find him. Stanley’s arrival with much-needed food and medicine ended the uncertainty surrounding Livingstone’s fate, turning the encounter into a legendary event in the history of African exploration. Stanley later capitalized on the event by publishing How I Found Livingstone, which added significantly to the public fascination with the explorer's saga.12