Hi...I've been researching a John B.Mars who died in Lead City,S.D. in Dec.1917, his wife Adda also died in Lead City also in Dec.1917. They had a dau. Mathilda who supposely married a John Murry and lived in Berrien Co.,MI. At present I'm not a 100% sure that this is my Mars line yet. I do have lots of info on John B.Mars son William L.Mars who is my gr-grand father(from 1880-1940).