I don't know anything about Facebook, not being interested in all the triviality that goes with it, but Peter Turnley uses the network to great effect, and posts not only superb photographs but very wise and thoughtful comments too, full of feeling. It's never off my visiting list. He's not only a marvellous photographer but a civilised man of great sensibility as well.
I'm not sure if I am allowed to put a link to it here but just google 😛eter Turnley facebook: and you'll get to it.