cnoyen's information came in a very round-about way. in 1364, a priest from one of the atlantic islands had returned to norway, bringing with him an astrolabe which he had received from the visiting franciscan friar, in exchange for a religious book. he made a detailed report to the king of norway. copies still survive of a social and geographical description of greenland by a local church official named ivar bardarson, who turns up in norwegian records in 1364, so this much of cnoyen's story tallies well with reality (although this report does not contain the sort of personal information relayed by cnoyen). cnoyen seems to have obtained his information from norwegian sources some time later, neither he nor the priest having actually seen the "inventio".