With respect to the last, he is perhaps best known for his dissertation on "pure" -ne stem nouns ("Die estnischen Nomina auf -ne purum", 1886).
Also known as the "king of Estonian folklore", Hurt planned the publication in the 1870s of a six volume series called Monumenta Estoniae Antiquae.
Hurt organised around 1400 volunteer collectors via a press campaign, who visited almost every house in Livonia collecting around 124,000 pages of folklore.
Due to financial difficulties, however, only two volumes of folk songs were published in 1875–76, entitled Vana kannel (Old Zither).
Hurt also published a three volume collection called Setukeste laulud (The Setos' Songs) between 1894 and 1907.