Gerard Mercator (1512-94) died the year before this map was finally published. is renowned for introducing the Projection named after him and for being the first to use the term ‘Atlas’. In 1595 the third and final part of his ‘Atlas Sive Cosmographicae, pars altera’, was published in Duisberg posthumously by his son Rumold Mercator. It included amongst others this map of Ireland. Rumold who himself died in 1599.
After the acquisition of Mercator’s stock in 1604 by Jodocus Hondius the production of the atlas moved to Amsterdam. It was first published there in 1606. This particular map remained unchanged through the editions to 1633 although it was altered for the first English edition in 1636. This example is from the 1634 Dutch edition. Bonar-Law (2013) pp. 25-34; Koeman II Me 12 no. 85 & Me 39A no. 6; Van der Krogt (1997) I 5900:1A.1.