Beginning at the mouth of Cuyahoga river, upon lake Erie, and with the said river to the Portage, between it and the Tuscarawa branch of the Muskingum;thence down the said branch to the forks, at the carrying place above fort Lawrence;thence by a west line, to the eastern boundary of Hamilton county, (which is a due north line from the lower Shawnese town upon the Scioto river) thence by a line west-northerly to the southern part of the Portage