In 1904, Kanakasabhai published his
magnum opus,
The Tamils Eighteen Hundred Years Ago. Dedicated to
Sir S. Subramania Iyer, the book was made up of sixteen chapters, each of which examined the life, culture, geography, trade, religion and philosophy of the ancient Tamil country based on the descriptions in two ancient Sangam epics, the
Silappatikaram and the
Manimekalai. The book is considered to be a classic and as one of the first notable efforts to research the history of
Sangam period Tamil Nadu. Kanakasabhai postulated entirely new pathbreaking theories in his book. He was the first person to suggest the existence of a
Kumari Kandam based on his reading of the
Silappatikaram. He also claimed that the Tamils were originally settlers from Bengal and that the word "Tamil" itself was derived from the ancient port of
Tamralipta. He postulated a new theory that the Dravidian upper classes originally hailed from Mongolia. Kanakasabhai was the first historian to attempt a systematic chronology of Tamil history. Kanakasabhai believed that the Sangam age might have flourished even in the 2nd century AD. He based these claims on the
Gajabahu synchronism proposed by Seshagiri Sastriyar. == Criticism ==