This character has been mentioned only and never actually shown in a comic book or on-screen. Despite their lack of physical appearances, information about them might still be relevant or interesting or at least worthy of documentation. Anything known about them is to be considered second-hand information.
Lew Moxon is a criminal during Batman's beginning years. Moxon is never directly encountered by Batman, but the criminal's name is written on a piece of paper in GCPD Headquarters.