The third-century BC poet Callimachus, apparently confusing Briareus as one of the Giants, says he was buried under Mount Etna in Sicily, making his shift from one shoulder to the other, the cause of earthquakes. Like Callimachus, Philostratus also makes Aegaeon the cause of earthquakes. According to an Oxyrhynchus papyrus, the first to use metal armour was Briareos, whilst previously men protected their bodies with animal skins. These stories are perhaps connected to a myth which may have made Briareus, like the Olympian god Hephaestus, a subterranean smith, who used the fires of Mount Etna as a forge for metalworking.