Regarding henry or hughs death. I have also come to the conclusion that he was killed at sea which may explain the half brother and sister in the family. There are two reasons for this . Firtsly, his son Morris, was my great grandfather , and one of his sons, Thomas who died in 1977 was my grandfather(thomas John but not the one someone else is trying to get birth certificates for ) and I understand he would not let him go to see as he wished because of the dangers involved. Secondly, Morris was a member of the a lifeboat crew, possibly suggesting a considerable motivation to save those in danger at sea
