Howard and John Heavin
Howard and John Heavin are mentioned several times in The Preston and Virginia papers of the Draper collection of manuscripts:
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I'm pretty sure this is the same family - they were involved in a Tory plot with Banes, McDonalds and other related families - Shell, Pepper.
Maybe this John is a brother?In one place it mentions John Heavin and his sons, which couldn't be John the son of Howard, since he would have been only 16.