Hi Pierre
I have been researching the Warwick family for over 20 years, when I started I would write my research on pieces of paper, then thankfully the computer and family tree programs came along.
I have taken the Warwick line, including your wife's line back to 1540, I believe Henry the eighth was on the throne. I have an extensive database of Warwick information, but I do not know everything. I found some of your information on a Warwick forum site, but the rest I have researched myself.
I have George Frederick Warwick as one of 7 children, by my research he is the eldest. As you stated, he had a sister Marie.
Were you aware that George Edward Warwick was married twice? He committed adultery with other women, including their servant who was 20 years younger than George, and also regularly committed violence against Julia, this information taken from the UK Civil Divorce Records. George Edward remarried in 1913. With his second wife, who was 7 years younger than George, and was 36 years old when she married George Edward. George Edward had at least one son with his second wife.
It might be a good idea to private message.
I look forward to hearing from you.
Martin