Ugric languages → Hungarian "szem", Mansi сам , Khanty сем ). A peculiar exception is the numeral '3', in which Hungarian ("három") and Mansi (хурэм ) point to an original cluster *rm, whereas the rest of the Uralic family suggests original *lm (Khanty холәм, Finnish "kolme", Estonian "kolm", Inari Sami "kulma", Erzya колмо, etc.) This has frequently been listed as an argument for considering Hungarian more closely related to Mansi than Khanty. The reverse has also been suggested—Hungarian and Mansi retaining the original form of the numeral, whereas Khanty and all the Finno-Permic languages would have innovated /l/ for some reason. Hungarian
Uralic languages published the most complete work on Finno-Ugric to that date. Up to the beginning of the 19th century, knowledge on the Uralic languages spoken in Russia had remained restricted to scanty observations by travelers. Already Finnish historian Henrik Gabriel Porthan had stressed that further progress would require dedicated field missions. One of the first of these was undertaken by Anders Johan Sjögren, who brought the Vepsians to general knowledge and elucidated in detail the relatedness of Finnish and Komi. Still more extensive were the field research expeditions made in the 1840s by Matthias Castrén (1813–1852) and Antal Reguly (1819–1858), who