Hi ,I have been chasing this same problem also ,but I did find Lydia`s death certificate that said she was the wife of a school master .Do you think that Lydia is CHT`s natural mother ? I have a copy of CHT`s marriage certificate and it contains a few odd things ,At the top of the column marked fathers name ,mothers name and maiden name it has -Charles Henry Trevanion followed by Lydia Francis then John Groves and last Sarah White .I think you give the impression that there were two CHT`s is that so?