Marilyn: My 1st cousin Mary OBERT D.O.B. 10/21/1845 in Quincy married a Peter J. MERTENS 4/20/1893 in St. Louis, MO. Is there any chance you might know something about this line of Mertens' ? I know absolutely nothing and have been unable to find any info. Any help you might be able to render would be most appreciated.