With reference to the Khasi branch of the Mon-Anam family, it would seem reasonable to suppose that if they are not the autochthons of a portion of the hills on the southern bank of the Brahmaputra, and if they migrated to Assam from some other country, it is not unlikely that they followed the direction of the different irruptions of foreign peoples into Assam of which we have authentic data, i.
"The Khasis"
P. R. T. Gurdon