摘要
Introduction In 1990 Pope John Paul II returned to Mexico a text that may be the first one composed on medical matters in New Spain[1].According to reputable scholars,this codex was composed under the inspiration of Don Francisco de Mendoza,son of the then Viceroy Antonio de Mendoza.Fray Jacobo de Grado,of the order of San Francisco,commissioned its writing to the"principal Indian"Martín de la Cruz,who composed it in Nahuatl and Spanish.
