What does "hard-looking" mean?
He was a hard-looking man in many respects: having a scar-crossing his nose, and a pair of black eyebrows which joined together just below his brow. His hair was black, matching the color of his eyes. He had a certain way at looking at people, and the first time somebody saw him walking down Santa Fe Avenue thirty-five years ago, he had thought, “There goes a very dangerous man.”