Sanskrit literature included many pre-modern dictionaries, especially the Nāmaliṅgānuśāsana of Amarasiṃha, but a milestone in the Indological study of Sanskrit literature was publication of the St. Petersburg Sanskrit-Wörterbuch during the 1850s to 1870s. Translations of major Hindu texts in the Sacred Books of the East began in 1879. Otto von Böhtlingk's edition of Pāṇini's grammar appeared in 1887.