In 1584, the Spanish mathematician Juan Pérez de Moya published a geometric work strongly practical in character titled Principios de geometria, de que se pod[r]an aprovechar los estudiosos de artes liberales, y todo hombre que su officio le necessitare a tomar la regla y co[m]pas en la mano. Con el medir, y dividir tierras. While a copy is now kept in the National Library of Lisbon, as far as we know no Spanish public library holds a copy of it, nor is there any reference to it in the secondary...