And the residue of the bed of the same river, and the islands and dry land within the same, so as aforesaid assigned to this state, and being south-westerly of the line herein last before described, are annexed to and shall be deemed to be, and henceforth shall be, parts of the county of Chester, and of the several adjoining townships and precincts within the same county.

Provided nevertheless, That the whole of Hogg-island, which lies opposite to the said boundary of Philadelphia and Chester counties, and of the marshes surrounding the said island, is hereby annexed to and shall be deemed to be part of the county of Chester, and of the nearest township of the same county.