chapter 3._

_E. F. Slafter, Editor, Voyages of the Northmen to America (Prince Society, 1877)_.

_E. F. Slafter, Editor, Discovery of America by the Northmen (N. H. History Society, 1888)_.

_N. L. Beamish, Discovery of America by the Northmen._

_A. J. Weise, Discoveries of America,