The Great Farini (William Leonard Hunt) "Canada's P.T. Barnum" -- In 1860 he became the 2nd person (after France's aerialist Blondin did it in 1859) to walk across Niagara Falls on a tightrope.
Plaque reads:
The Great Farini
Highwire Artiste, Inventor, Explorer, Author, Artist & Botanist
Submitted by Owen Anderson.