Tartar Relation [Hystoria Tartarorum]
Other scholars disagree about whether or not C. de Bridia, who describes himself as "least of the Franciscans," was sent by Pope Innocent IV on the missionary trip with Carpini to visit Batu Khan and Güyük Khan.
See George D. Painter, ed. and trans., in R.A. Skelton, Thomas E. Marston and George D. Painter, eds., The Vinland Map and the Tartar Relation (London, 1965), pp. 68-71.