The town of Massacre in the Windward Islands is the community nearest to where Bertha and Rochester have their isolated honeymoon on "a small estate that was owned by Antionette's mother" before she died (Rhys 60). This is where all the interactions between Rochester and Bertha play out on the page as Bertha gradually descends into the "madness" of indulging in alcohol and sex and growing suspicious of Rochester gold-digging for her dowry.

Rhys, Jean. Wide Sargasso Sea. W.W. Norton & Company, 2016.