The Plantation of Ulster was a mixed success for the English. By the 1630s, there were 20,000 adult male English and Scottish settlers in Ulster, which meant that the total settler population could have been as high as 80,000 to 150,000. They formed local majorities of the population in the Finn and Foyle valleys (around modern Derry and east Donegal), north Armagh and east Tyrone. Planters had achieved substantial settlement on unofficially planted lands in north Down, led by James Hamilton and Hugh Montgomery, and in south Antrim under Sir Randall MacDonnell. The settler population increased rapidly, as just under half of the migrants were women – a very high ratio compared, for instance, to contemporary Spanish settlement in Latin America or English settlement in Virginia. New England attracted more families, but still was predominately male in its early years.