Thanks for the info. on Joseph being in Middleton in 1870. I haven't been able to find that. Who is listed as head of house?
As far as Catherine Cohoe, I checked and have a different date listed for birth and death. 1821 as birth and died in 1842. George Park Frost, Catherine and Joseph's son was born in 1842 so I'm guessing that Catherine died in childbirth. Her parents are Nathan Cohoe and Rebecca Lemon.
According to George Park's obituary, he married his childhood sweetheart Jeanette Ronson in Canada before moving to the States in 1886.
Joseph Frost and Walter would have been in the Grant county, Wisconsin area by then. Wilmot came in the 1890's.