Walnica (f)
original: валница
English transliteration of валница (Valnica), which is actually an alternative term for a bladder pipe; According to Jacquot, who provides a brief description,"it is an essentially pastoral instrument; the bag [of which] is often formed from a bull's bladder"; NB: ➺ Balnica and Valnica.
MMA: The Metropolitan Museum of Art catalogue of the Crosby Brown collection of musical instruments of all nations, prepared under the direction, and issued under the authorization of the donor, I-III. New York, 1903-1914. Vol. I: Europe (1904), p.157.
Jacquot, Albert: Dictionnaire pratique et raisonné des instruments de musique anciens et modernes. Paris, 1886, p.271-272.