The Canadian Mining Hall of Fame has a short biography of Sir Harry Oakes (the HO in HOCO). Just as the other posting doesn’t mention his involvement in Niagara Falls, this one doesn’t either.
Sir Harry Oakes
1874 – 1943Adventure, fame and fortune all came the way of Sir Harry Oakes, the self-made prospector and mine-finder who transformed Ontario’s Kirkland Lake district into one of the world’s most famous gold camps.