The 'Emerald Island' is a
phantom island reported by some early explorers to lie between Australia and Antarctica and south of
Macquarie Island, eg by the ship ''Emerald'' in December 1821. It was supposed to be a small but high or mountainous island at Latitude 57° or 57° 30' South and Longitude 162° East.
Reference
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Reference in an 1882 paper of the Transactions of the Royal Society of New Zealand
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Reference in an 1890 paper of the Transactions of the Royal Society of New Zealand