Who is Faber? How did he and Montag first meet?

Faber is an aging intellectual in a world with no place for such people, Faber greatly disapproves of the dehumanized, oppressive society in which he lives. However, Faber feels it is safer to live discreetly rather than protest or attempt to change the world. Faber and Montag first met years ago in a park and after a long discussion about books, gave Montag his contact information.