He was often known as the "Apostle to the Indians" (casino Indian not quickie-mart Indian)
https://en.wikipedia.org/wiki/John_Elio ... sionary%29
Notable accomplishments include having a book banned due to the proclamation that Christ is the only heir to the crown of England
http://digitalcommons.unl.edu/libraryscience/19/
and of course the delightful read: "A Brief Narrative of the Progress of the Gospel amongst the Indians in New England, in the Year 1670"
http://www.bartleby.com/43/12.html
But, the good reverend may be responsible most for the "Praying Indians" and for the 1646 "Act for the Propagation of the Gospel amongst the Indians."
https://en.wikipedia.org/wiki/Praying_Indian#History
