Dibyendu Chakraborty 
Origin of Bangla Second Part Ghoti The Highlander [EPUB ebook] 

Naru, a Bengali by birth, was shown by destiny that the process of peopling India had happened along the Prehistoric Elevated Highway Systems of India. Adivasis came first, and then a different group followed them to get settled in the highlands. In Bengal, the members of that new group later became known as ‘Ghoti’.