Harry Knowles was an actor from the days of silent movies. He only appeared in 5 films. He was born in 1878 and died on Febuary 29, 1936, (in Kansas City, Kansas).
You would think such an obscure actor would have a high bacon number. But he doesn't, he only scores an extremely common 3.
Harry Knowles was in When It Strikes Home with William Bailey.
William Bailey was in Carrie (1952) with Eddie Albert.
Eddie Albert was in Big Picture, The (1989) with Kevin Bacon.