By the age of sixteen, he had a good knowledge of Hungarian, Latin, French and German, and was rapidly acquiring English, the Scandinavian languages, Russian, Serbian, and other Slavic languages.
He had a good knowledge of Hungarian, Latin, French and German. This was by the age of sixteen. He was rapidly acquiring English. This was by the age of sixteen. He was rapidly acquiring the Scandinavian languages. This was by the age of sixteen. He was rapidly acquiring Russian. This was by the age of sixteen. He was rapidly acquiring Serbian. This was by the age of sixteen. He was rapidly acquiring other Slavic languages. This was by the age of sixteen.