Murray argues that 'camp gate coins' from the 4th century actually depict Roman signaling fires, not turrets.
Host Murray explores the methods and evidence for Roman military signaling, covering flag systems from Polybius, fire-signaling techniques from Sextus Julius Africanus's Kestoi, and the role of encryption. He presents a controversial theory linking 4th-century 'camp gate coins' to signaling fires and suggests a connection between Roman encryption and the Germanic Futhark runic alphabet.
