Hi Vicky
Marcellus Cook was born in Martha's Vineyard 1866 ( not 1867 as other have said. ) - he is registered inaccurately under the Martha's vineyard Chilmark Census of 1880 as Marcellus ( Poole ? illegible ) aged 14 - farm labourer - Indian. He came to New Zealand on the Barque Swallow in 1882 aged 16 - so the dates tally. Finding his father and mother is proving difficult.. Have information on him if you want it still. He is my grandaughters great great grandfather too on her Maori side.
You may already have what you need however
Paula