Link, the green-clad protagonist of Nintendo's Zelda series, is usually portrayed as a boy. A couple of games, however, feature him as a grown-up. Nintendo concept artist Katsuya Terada, however, also sketched a mature–even elderly–hero. These designs, along with fantastic watercolors of a more familiar young adult link, were made public in a long-out of print art book. Enjoy the flickr set: it might not stay up long!
Katsuya Terada Zelda Art [History of Hyrule via Kotaku]