Ludwig von Köchel publishes Chonologisch-thematisches Verzeichnis sämtlicher Tonwerke Wolfgang Amadé Mozarts (Catalogue of Mozart's Works or "The Köchel Catalog")
... and came further south than anyone before him
John Hanning Speke, (1827-1864), discovered Lake Victoria
Henry Morton Stanley, (1841-1904), found back Livingstone; ...