James Henry Cotton was my ggg grandfather on my mothers side. Mum (Mavis Irene Cotton) was the only child of Alfred Charles Cotton to Florence Ruth Epplett.
l've made a humble start on researching the tree, but have found it tough going with the family being so fragmented and out of touch.
Information I have can be found athttp://www.angelfire.com/emo/snapdragon/cottontree.htm
I hope this info is of use to you. Also naturally would appreciate any snippets you can send my way.
This coming weekend I'll be following up on a few leads at both Wakapuaka and Marsden cemeteries, in the hope of filling in some of the gaps.
Look forward to hearing from you.