4th is indeed Indian, from ca 100-400 AD. I haven't really taken the time to learn how to ID these, but this should help:
https://www.google.com/url?sa=t&sou...6_KNIS-_av4g
I believe the dudes with the mustaches are generally earlier.
https://www.google.com/url?sa=t&sou...6_KNIS-_av4g
I believe the dudes with the mustaches are generally earlier.






























