Synopsis This work formed the first volume of the famous Tantrik Texts series edited and published by Arthur Avalon (Sir John Woodroffe). The work belongs to the Dictionary Class. The Matrikanighantu and Vijanighantu or Mantra-Kosha by Bhairava Rishi are dictionaries of the single vowels and consonants of the Sanskrit language. Both, published from ancient and rare (in some cases extinct) manuscripts for the first time comprise the main body of this book. They give the Tantrik meaning of the vowels and then of the consonants with a view to facilitate the understanding of the Tantrika vijas or mantras of that name. These vijas are generally given in the Tantrik Texts in a covert way.