Not surprised the Romans had contact with all types of people. I remember another user here saying that Europeans saw American Indian tribes had Roman and Greek coins in their possession. I would not be surprised if American Indians encountered the Romans.
Yup. See the coins at the below link.
Barry Fell writes that the first post-Columbian European to document pre-Columbian voyages was Columbus. He recorded an old guy encountered on his first voyage who was wearing a medalion on a necklace, and the medalion was an old gold coin the old man had found when diving for food as a young man. This account has been dismissed by the true believers who call themselves skeptics by claiming that the coin had been lost or left behind by someone in Columbus' own expedition, on another island, and someone raced across the open sea to A) return it and B) confound future readers. ;')