This tale of the "Old Man of the Mountain" was assembled by Marco Polo and accepted by Joseph von Hammer-Purgstall, a 19th-century Austrian orientalist responsible for much of the spread of this legend. Until the 1930s, Hammer-Purgstall's retelling of Marco Polo's fiction served as the standard description of the Nizari Ismailis across Europe. "The Russian orientalist Vladimir Alexeyevich Ivanov ... gained access also to Nizari literature preserved in Central Asia, Persia, Afghanistan and elsewhere ... compiled the first detailed catalogue of (Nizari and Fatimid) Ismaili works, citing some 700 separate titles attesting to the hitherto unknown richness and diversity of (Nizari and Fatimid) Ismaili literature and literary traditions".