Friedreich, J. B. Geschichte des Rätsels. Dresden, 1860. 8vo,
pp. viii, 248.

Führer, A. Sanskritische Rätsel. Zeitschrift der Deutsch. Morganländer
Gesel. 1885. pp. 99-102.

Haug. Vedische Rätselfragen und Rätselspruche. Trans. Munich Academy,
1875.

Krauss, F. S. Allegemeine Methodik d. Volkskunde 1891-97, p. 112.

Korean Conundrums. Korean Review. Seoul; 1906. pp. 59-60.

Lakshminatha upasaru. Collection of Riddles. Patna, 1888. 32mo, pp. 32.

Ludwig. Der Rig Veda. iii. pp. 390.

Mitra. Sarat Chandra. Riddles current in Bihar. Journal Asiatic
Society, 1901, 8vo, pp. 33-58.

Petsch, R. Studien über das Volksrätsel. Berlin. 1898, 8vo, pp. 139.

Phillott, D. C. Persian Riddles. Calcutta, 1906. Journal Asiatic
Society of Bengal, pp. 86-94.

Rizal, J. Specimens of Tagal Folk-Lore. London, 1889, Trubner's Record,
pp. 45-46.

Sibree, Jr., J. The Oratory, Songs, Legends and Folk-Tales of the