Seisen was the same chieftain of Marechkawick who in 1637 sold Blackwells island. Mattano was chief of Nayack at the date of this deed, having succeeded Meijeterma after 1649. INDIAN PATHS That the Nayack natives who were the original owners of lower Manhattan were related to the Marechkawick Indians, is made evident not only by their removal to this territory, but by the joint action of their chiefs in this sale, and by the appearance, nineteen years later, of the sachem, Maganwetinnemin, as the representative "for the tribe of Marychkenwingh and for Nayack." From these evidently close relations it is assumable that the Manhattan natives were Canarsee, and that their superiors or rulers were the sachems of the Brooklyn and Flatlands communities.

We may even trace in Meijeterma who led the Manhattans of Nayack prior to 1649, and in Seyseys who ruled the Canarsee in.1637, the probable leading participants in that momentous sale in 1622, of the site of the future Great Metropolis.