1. Ganong, W. F., “Crucial Maps”, Trans. Roy. Soc. Canada, Sect. 2, 135 (1929).
2. Hay, D., English Historical Rev., 54, 246 (1939); Camden Series, 74, 116 and 117 (1950).
3. Williamson, J. A., “The Voyages of the Cabots” (London 1929).
4. Williamson, J. A., op. cit., 40.
5. Fontoura da Costa, A., “A Marinharia Dos Descubrimentos” (2nd ed.), 206 (Lisbon, 1939).