Irish Maps & Sea Charts - [images not online] University of Notre Dame Hesburgh Libraries: “ This collection is comprised of the David J. Butler Collection of Maps of Ireland and the Thomas C. and Helen G. McGrath Collection of Sea Charts of Ireland. Included in the Butler Collection are over 80 early printed maps and over twenty photostats of maps from the Library of Congress. The original maps were printed from the sixteenth to the eighteenth centuries. Complementing the maps is The Thomas C. and Helen G. McGrath Collection of Sea Charts of Ireland, which includes eleven charts also printed from the sixteenth to the eighteenth centuries. Both collections were donated by Mr. and Mrs. Thomas McGrath.”