More info from Mary Caldwell:

Outward Bound anchored off Prune Island for lunch every time she was in the Grenadines. A picnic lunch was arranged on the beach under a manchineel tree and guest swam in the clear blue waters while John planted coconut trees along the shore. Unfortunately each time we returned to the island, the trees had been eaten by the goats.
John approached the government of St Vincent and arranged to pay the rent (45 EC$) to remove goats and plant trees. Mr. Joshua the then chief minister said: “If you think the island has so much potential, why don’t you develop it?”