 The purchases were restricted to the five islands of the Cays, while the larger island of Mayreau remained in private hands.In 1985, the Government of St. Vincent and the Grenadines (GOSVG) requested assistance from the Organization of American States (OAS) for developing tourism within the Grenadines.This led to a detailed proposal for the formation of a 'Tobago Cays National Park' with initial investment costs estimated at $US 1 million (Heyman 1988).