The leaves were found lying idle in Vaitheeswarankoil aorund the 13th century. Some interested in Astrology realized their values and copied the contents on palm leaves and made exact replicas. These leaves have been handed down over generations to make predictions.
They earned their livelihood through Nadi-Astrology. They got trained from their elders to do Nadi reading. The then Marata King Sarabhoji and Chola Kings patronized this form of astrology and translations. It seems that these Nadis were originally written on animal skins and some leaves and later they were copied on palm leaves. They are preserved by applying oil extracted from peacock's blood. The primary centre for Naadi Shastra is in Vaitheeswarankoil, near Chidambaram in Tamil Nadu, a state in South India. Here Lord Shiva is said to have assumed the role of a vaidhya or doctor, who alleviated the miseries of his devotees.