I know it has been awhile since this message was posted, but I believe your William is the one and the same as mine. Mine is William Briggs born September 30, 1836 Indiana (Possibly Rush County). Died August 18, 1909 Madison County, Indiana. Married America Stewart born 1842 Indiana and died 1894. I don't have all the children you have. But I have Thomas Lemuel born March 27, 1865, Rachel born abt 1860 and Margaret born abt 1862 that you have. From the 1860 Census there is also Jane and America. If you agree, his parents are Andrew and Martha Farrow Briggs from Kentucky. My husband comes from William's brother, Thomas.