Looking for Joshua Stewart burial
Joshua Stewart was born c1810 in Franklin Co, Nebraska. He married Mary Jones in Mercersburg, Pa in 1841. Their children were John, Mary, Ellen, Susan, Sarah and Thomas. In around 1855 they move to Henry County, Illinois and are shown in the 1860 census in Wethersfield Township, Henry County, Illinois. After that Joshua and Mary disappear and the children are found in south eastern Weller Township, Henry County, IL in the 1870 census. I'm looking for the burial place of Joshua and Mary. Any help will be appreciated.