Sentence:  Old attitudes are held more tenaciously in the Tidewater than the Piedmont ; so that a line running down the length of the South marking the upper limits of tidewater would roughly divide the <WSD>Old</WSD> South from the new , but with , of course , important minority enclaves . 
Meaning of the word marked with <WSD> tags:  the South of the United States before the American Civil War