Yes, he calls himself Peter. His father was Percival Harris who married Emilee Blanche Helsen, and she called herself Blanche.
Do you have any information about Marcel's military career? Peter has given me some information about his Grandfather and we already knew that Marcel owned a pub in Thames Ditton called The Albany. In fact my husband spent some time living there in the 50's.
I'm afraid I do not know anything about Emily Rossiter. Marcel was the oldest of the children of Victor and Blanche Helsen and my father in law, Lucien Maurice was 6 years younger. He died when my husband, David, was only 9 years old n 1955. I believe Marcel died before that. Several of the brothers including Marcel and Lucien were Gilders by trade and had several businesses including one in Oxford Street, London.
I have never met Peter, but he contacted me through a genealogy website and I have offered to help find out about Marcel as I do family history research as a hobby. He believes his Grandfather was a senior member of the military (presumably the French Military) and he tells me that he once saw a box of medals. I am not sure if they would have been from WW1 or WW2. He said his Grandfather was often visited my important military personnel. I presume these would be French.
I hope you can help.
Carole