Geography describes commercial relations between western India and Alexandria, the chief eastern emporium of the Roman Empire. He identified Kanyakumari (Cape of Comorin) along with the Gulf of Mannar as a center for pearl fishery. He also identifies Korkai, a place to the east of Kanyakumari, as an emporium of pearl trade.
Another ancient Greek book, the Periplus of the Erythraean Sea, contains sailing directions for merchants from the Red Sea to the Indus and Malabar, and even indicates that the coast from Barygaza (Baroch) had a general southward direction down to and far beyond Cape Komari.
consists of those parts known locally as Nanjil Nadu and Idai Nadu. The
names of the villages of the district such as Azhagiapaandipuram,
Bhoothapandy, Cholapuram and Kulasekaram reveal that these places were governed by several rulers at difficult periods of time.[clarification needed] Nanjilnadu was under the rule of Pandiyas till the early 10th century and then under Cheras.