Help me track down my lost cousin

EDITOR: While searching about my SVG family, I stumbled on a reader’s letter published on December 11, 2015: “The Madeira Portuguese in St.Vincent, by Oswald Fereira. He is my lost cousin. Is there a way you could find anything more? He might be deceased. I would love to track him down. Many thanks.

Laurence Arthur (daughter of Leo Arthur, niece of Bertram Arthur)