I tried to find death dates for James B. Mabie/Emily Mabie. According to the Kosciusko County, Indiana Cemetery Records, Vol. IV, Tippecanoe and Washington Townships, theyare buried in Hillcrest Cemetery, Row 21, Stone 1, no data given. I traced them through the 1850-1880 censuses (Tippecanoe Township) but found neither listed in 1900. The 1880 census showed James Maby, 72, and Emaline, 57. I saw a listing for a Mabee, Jas. G. who died of heart failure at 85 ordered to be buried abt. January 6, 1895 by a trustee -- perhaps this is your James B. Mabie who was born in 1810.Good Luck in your hunting!!