Map showing the important port cities of ancient Tamil country and its approximate northern boundary
Source of map: http://www2.demis.nl/mapserver/mapper.asp (mention : "Disclaimer: With this statement DEMIS BV grants you permission to freely copy the PNG images returned by our server and use them for your own purposes, including web pages. We would appreciate a reference to our server but such a reference is not required, nor do we take responsibility for the accuracy or quality of the maps". at http://www2.demis.nl/mapserver/DataSrc.htm)

Modified by me using Inkscape.
Lotlil