I slightly deviate from the main subject. A thread can be started separately if required on this.
Even if scholars place Sangam to a Maximum of 2nd BC, karavela Inscription etc the above verses show that Tamilnadu with defined Chola, Pandya territories existed much earlier.
The area mentioned south of Mahendragiri MAY or MAYNOT be our Thenmadurai and Kapadapuram.