My grandfather was George Henry West, born in 1890's, who traveled from Montserrat to Panama Canal Zone to New York. His parents were John West and Mary Roach of St Patrick's Parish.
My grandmother was Esther Boatswain b. 1892 probably near Bethel, Montserrat. Her parents were Timothy Boatswain and Susannah/Sabina Daly (or Daley.)
Unfortunately both Roach and Daly were fairly common Montserratian surnames and, heaven knows, there are Marys everywhere.
My West ancestor had a cousin named Rachel Dowdy b. 1899. She lived with them in New York for years after she left Montserrat.
To date, I haven't come across any Blake or Dorsett family on my tree. You can contact me at email@example.com
if you have any specific questions.