Breadfruit is closely related to the breadnut, from which it might have been naturally selected. Thistlewood eventually purchased her from Cope and lived with her at Breadnut Island. In 1781, because of illness, Thistlewood tried to sell Breadnut Pen. Thistlewood never returned to England, and died at Breadnut Island, Jamaica in November 1786. The breadnut fruit disperses on the ground at different times throughout its range. The breadnut ("B. alicastrum") was used by the Maya civilization for its edible nut. The breadnut is high in fiber, calcium, potassium, folate, iron, zinc, protein and B vitamins.