You probably have this info now as we have just found this site.
David Chappelow was my partner (Norm Martin)'s father (Cyril Martin)'s great grandfather as well. The information written down by Norm's grandmother(Delsie Fearnside)states that David's parents were John Chappelow and Elizabeth Butterfield. David's daughter Elizabeth married Joseph Fearnside and they had 10 children, 1 of which was Delsie. She married Ernest Martin and they had Doylah & Cyril.