See also references for related subjects.
Loeber, Rolf, “Preliminaries to the Massachusetts Bay Colony: the Irish ventures of Emanuel Downing and John Winthrop, Sr.”, in: Barnard, Toby, Dáibhí Ó Cróinín, and Katharine Simms (eds.), ‘A miracle of learning’: studies in manuscripts and Irish learning. Essays in honour of William O’Sullivan, Aldershot: Ashgate, 1998. 164–199.