No, I don't have a original document proving Mary Elizabeth Preston and Jacob Sights were married. I do have a narrative written by a Sights researcher who wrote to every Seitz/Sides/Sights/Sites living in the U.S. and compiled all of their research. I have 122+ pages of said research, which says that Jacob was from Philadelphia the son of Peter Seitz. Mary Elizabeth Preston was also from Philadelphia, Pennsylvania. Jacob and Mary married 1783 in Philadelphia, after the Revolutionary War. Their children were born in North Carolina (Adam, Mary, David, Isaac, Ann, Catherine, Frances, Elizabeth) It is possible that Jacob had 2 wives, but in the research it says that Mary's mother (also a Mary) married a Black after Mr. Preston died. I will contact the Sights researcher and see if she has documentation of the Preston/Sights marriage in 1783. Thanks for responding to my message.