Mr. Knightly is middle-aged man: one can tell that by his forehead wrinkles and those beard, which also reveal the charm of a man. From his clothes, we can speculate that he may from a high class.
While the wrinkles cover his forehead, but his short hair and the whole temperament exude strength and vigor, especially a distinguished nose and a chiseled jaw. His thin lips press together, leaving two lines going from the sides of his nose to the corners of his mouth. His vivid eyes and raised eyebrows indicate his curiosity for the world.
He is the typical feather of English gentlemen and may be well-educated. And his character may be framed by his rich experiences. All in all, he will have a great first impression on other people.