Henry Kells and Caroline Avery came to Mukwonago Twp, Waukesha County, abt 1848 with eight of their 12 children, 4 more were born in Mukwonago. Abt 1880 they moved to Vernon and both died there, Henry abt 1894. I am looking for descendants, and for exact death dates and possible cemeteries. They do not show up in the pre-1907 death index under Kells. Any suggestions on possible sources would be appreciated.