St. Johns Bay Rum Soap. The Virgin Islands has for years been known throughout the world for the superior quality of its BAY RUM. The word ST. JOHNS on BAY RUM is like Sterling on Silverware. It stands for the best in the world. This superiority is due to a special quality of leaves of the Bay Trees (Pamenta Acris), which grow on the island of St. John, and in no other part of the world.