David Livingstone (1813-1873)

Livingstone spent the first 27 years of his life as a missionary in South Africa.  For the remainder of his life he explored Africa.  For years he went missing.  But in 1871 the journalist, Henry Stanley found him.  This is when Stanley spoke his most famous words, "Dr. Livingston, I presume?"  Livingston died two years later of dysentery.