Emeric Essex Vidal was the brother of Alexander and Richard. He also had a career in the Royal Navy as a purser for some fifty years. He seems to have had a nice sideline in selling his paintings, and having books of them published.
Jane Vidal nee Essex the mother of the above three is my link to the Vidal family. I thought that Essex Street in Sarnia was named after Richard Hamiltom Essex, another artist. Alfred Essex must be an ancester, but I have never come across him before I would be grateful for any information.