Cabarrus County, North Carolina marriages 1793-1868 by Frances T. ingmire Jacob Furr to Mary Jane Swann 23 Sep 1865
Is this the Jacob you are hunting? I know that he is the son of Daniel C. Furr listed in Cabarrus Co. NC, whose wife in 1850 was Sarah Ann Clay. (married 19 Nov 1848 in Cabarrus Co.) But Sarah is not the mother of Jacob.
Have you seen the web page of Bill Furr "The Furr Surname"?He has lots of information on it about lots of the FURR familes all over the United States. Might check there for your Jacob Furr.