From eight Jaferyas of that kind and one Arabic map of Hind and from four newly drawn Portuguese maps which show the countries of Sind [now in modern day Pakistan, Hind and Çin geometrically drawn, and also from a map drawn by Qulūnbū [Columbus in the western region, I have extracted it. By reducing all these maps to one scale this final form was arrived at, so that this map of these lands is regarded by seamen as accurate and as reliable as the accuracy and reliability of the Seven Seas on the aforesaid maps."