Some Elfdalian passages are found in Andreas Johannis Prytz’ Comoedia om Konung Gustaf then första (1622). Stig Björklund, in his 1956 doctoral thesis, argues the language was influenced by the hiring of two students from Älvdalen as actors for its first stage performance in Uppsala in 1621. According to Björklund, the student who wrote the Elfdalian dialog is likely the same Daniel Johannes Buscovius, for whom the first Elfdalian wedding poem was written.Björklund, 1956, pp. 19–28.