This is one of the 23 delegations (satrapies) shown bringing offerings to the King during the New Year (Nou Rutz) festival.
The bas relief of each delegation provides valuable insight into the clothes and gifts from each region at that time.
The Indians are 1st on the left (5th from the right) on the bottom tier of the Apadana stairway.
Sindh was part of the Indus valley civilisations in modern day Pakistan.
They are represented by 5 members, and bring bags of gold, battle axes and a mule.
The original bas relief is shown in one of the photographs (with low tonal range due to the shade).
The other photographs have been digitally enhanced by blurring the background in order to reveal their otherwise hidden beauty. I hope you find them as fascinating as I do.