Tamil region, large landowners were known as vellalar, and landless labourers, including slaves, were known as kadaisiyar and adimai.  

What were ordinary ploughmen were known as?

The given image is which kind of coins. Explain the characteristics of these coins.

What is the title of the earliest Tamil composition, and what are its defining characteristics?

Between $2200$ and $1900$ years ago, a coastal settlement where ships unloaded goods from distant lands. A massive brick structure, which may have been a warehouse, was found at the site. On an outline of the political map of India mark the place depicted in the above description.

Solve the crossword using the given clues.

Across
3. He wrote the book Indica

Down
1. a business community
2. mode of trade through exchange of goods
4. a Tamil epic