Mercury/Hermes. Ordered by Zeus to kill Argus. Mercury is a major god in Roman religion and mythology, being one of the 12 Dii Consentes within the ancient Roman pantheon. He is the god of financial gain, commerce, eloquence, messages, communication, travelers, boundaries, luck, trickery and thieves; he also serves as the guide of souls to the underworld. He was considered the son of Maia, who was a daughter of the Titan Atlas, and Jupiter in Roman mythology. In his earliest forms, he appears to have been related to the Etruscan deity Turms; both gods share characteristics with the Greek god Hermes. He is often depicted holding the caduceus in his left hand. Similar to his Greek equivalent Hermes, he was awarded the caduceus by Apollo who handed him a magic wand, which later turned into the caduceus. Mercury did not appear among the numinous di indigetes of early Roman religion. Rather, he subsumed the earlier Dei Lucrii as Roman religion was syncretized with Greek religion during the time of the Roman Republic, starting around the 4th century BC. His cult was introduced also by influence of etruscan religion in which Turms had similar characteristics. From the beginning, Mercury had essentially the same aspects as Hermes, wearing winged shoes and a winged hat, and carrying the caduceus, a herald's staff with two entwined snakes that was Apollo's gift to Hermes. He was often accompanied by a cockerel, herald of the new day, a ram or goat, symbolizing fertility, and a tortoise, referring to Mercury's legendary invention of the lyre from a tortoise shell. Like Hermes, he was also a god of messages, eloquence and of trade, particularly of the grain trade. Mercury was also considered a god of abundance and commercial success, particularly in Gaul, where he was said to have been particularly revered. He was also, like Hermes, the Romans' psychopomp, leading newly deceased souls to the afterlife. Additionally, Ovid wrote that Mercury carried Morpheus' dreams from the valley of Somnus to sleeping humans. Archeological evidence from Pompeii suggests that Mercury was among the most popular of Roman gods. The god of commerce was depicted on two early bronze coins of the Roman Republic, the Sextans and the Semuncia. When they described the gods of Celtic and Germanic tribes, rather than considering them separate deities, the Romans interpreted them as local manifestations or aspects of their own gods, a cultural trait called the interpretatio Romana. Mercury, in particular, was reported as becoming extremely popular among the nations the Roman Empire conquered; Julius Caesar wrote of Mercury being the most popular god in Britain and Gaul, regarded as the inventor of all the arts. This is probably because, in the Roman syncretism, Mercury was equated with the Celtic god Lugus, and in this aspect was commonly accompanied by the Celtic goddess Rosmerta. Although Lugus may originally have been a deity of light or the sun, similar to the Roman Apollo, his importance as a god of trade made him more comparable to Mercury, and Apollo was instead equated with the Celtic deity Belenus. Romans associated Mercury with the Germanic god Wotan, by interpretatio Romana; 1st-century Roman writer Tacitus identifies him as the chief god of the Germanic peoples. Mercury is known to the Romans as Mercurius and occasionally in earlier writings as Merqurius, Mirqurios or Mircurios, had a number of epithets representing different aspects or roles, or representing syncretisms with non-Roman deities.