The island was Pulau (island) Run, part of Banda islands, that was swapped with Niew Amsterdam island that is the Manhattan now. The interesting part was Dutch immediately agreed for the swap because Pulau Run and two/three other islands in Banda which had aready been part of Dutch East indies company/VOC were only islands in the world where you could find nutmeg. At that time nutmeg was more expensive than gold per weight. So what happened was the Brits smuggled the seeds and trees of nutmeg ahead of the swap, then upon getting the Niew Amsterdam (now Manhattan), theyreplanted the seeds in Madagascar, at that time under British control. That replanting of nutmeg in African colonies of Brits ended VOC/Dutch East Indies Company 's monopoly in nutmeg trades. And British get full control of New York. This, is the best international deal the Brits ever made. Legendary the worst swap ever for the Dutch