From the cited article:
“Not many years later Thomas Morton walked the forests around Boston harbor and saw “in a place where many inhabited, there hath been but one left a live, to tell what became of the rest, the living being (as it seemes) not able to bury the dead, they were left for the Crowes, Kites and vermin to prey upon. And the bones and skulls upon the severall places of their habitations, made such a spectacle after my coming into those partes, that, as I travailed in the forest nere the Massachusetts, it seemed to mee a new found Golgatha.”
Again where are the sixty million??? Those are numbers that are not typically thrown around about native population