Umuganga w'Umwongereza John Cotta, yanditse ibitabo ku buvuzi n'ubupfumu, yavuze mu 1612, ko ico catsi cafatwa ico gihe nk'inyishu y'ibibazo vvose n'ingwara zose, bashobora kuzosanga gishobora kuvura ingwara nyinshi cane.
