THIS WAS ORIGINALLY A LUMBER MILL AND LATER A GRIST MILL DATING FROM THE 19TH CENTURY. THE FIRST MILL WAS STARTED BY WILLIAM MCDONALD CIRCA 1744. IT EVENTUALLY WAS OWNED BY THE WIFE OF JACOB KLINE AND STAYED IN THE FAMILY UNTIL 1899, THE MILL IS NOW BEEN REFURBISHED BUT STILL RETAINS SAWMILL MACHINERY INSIDE. IT IS LOCATED ON THE NORTH BRANCH OF THE RARITAN RIVER ON A PRIVATE ESTATE