Alexander of Villedieu's thirteenth-century grammar or Doctrinale in rhymed hexameters was a much-used medieval textbook printed a hundred times before 1500. At the end of his treatise on education de pueris ... instituendis (1529), Erasmus is not far from paying it a compliment, perhaps because he must have known it at Deventer. The Catholicon of the thirteenth-century Dominican John Balbi of Genoa was a Biblical encyclopaedia printed as early as 1460 and called Summa grammaticalis valde notabilis, quae Catholicon nominator. The Mammetrectus was a glossary on the Bible, the lives of the saints and other devotional writings, compiled by one Marchesinus of Reggio of very uncertain date. It was printed in 1470.