Did his 1st wife, Mary J. Walker b.1859 in Yarmouth, NS, Canada (She is listed as being from Yarmouth, Nova Scotia. It is noted that she is white. Mary did not have any children with William before she died early (maybe during childbirth in 1882). Parents: George and Mary J. Walker.) die or divorce William before he married his 2nd wife, Laura Van Hise in 1884 in Boston, MA?