Sankaran kumar is very nice tourist guid. I was in Mamallapuram many times. Kumar showed me many intresting places in south India. He have goon knowledge in South Indian culture and tradition. I was with my friends from uk. That all liked his guiding. He is good person for guid in Mamallapuram. 

Sankaran took us around Mahabalipuram and it was a good experience. We rented bikes and saw probably all famous places there. We became friends and met a few times after that. He also offered us to go to Kodaikanal with us, which was our next stop in our trip in India. Unfortunately that didn't happen because we had to get our laptop fixed in Chennai. Maybe next time :)