In 1836–1838 Lermontov's interest in history and folklore re-awakened. Eclectic "Boyarin Orsha" (1836), featuring a pair of conflicting heroes, driven one by blind passions, another by obligations and laws of honour, married the Byronic tradition with the elements of historical drama and folk epos. An ambitious folk epic, "The Song of the Merchant Kalashnikov" (initially banned, then published in 1837 due to Vasily Zhukovsky's efforts), was unique for its unexpected authenticity. Lermontov, who haven't got a single academic source to rely upon, "entered the realm of folklore as a real master and totally merged with its spirit," according to Belinsky. Lermontov's "Cossack Lullaby" "went the whole round: from the original folklore source to literature, and from literature to living folklore. ... For one and a half centuries people have performed these literary lullabies in real lulling situations Russia," according to Valentin Golovin.