He is not listed in the wills and intestate lists that the Rochester Library has online; he died before the 1850 census and so is not there. To the best of my knowledge the RDD for the dates you are interested in are only available on film and are not online anywhere; those films can be ordredd on loan from the NY State library in Albany by your local library, to read them at you location.
I did not see any likely Chaffee's in the online newspaper index at the Rochester Library. Most likely any information would be found in church records (http://rmc.library.cornell.edu/eguides/lists/churchlist1.htm...
), or in land records (which I am told are online and searchable but only inside the county clerk's office (deep sigh). Same deal with any possible court records. Have you tried the local historians? [http://mcnygenealogy.com/historians.htm