Highland small-pipe
Seemingly a synonym of Chamber pipe.
Baines, Anthony: Bagpipes [1960]. Oxford, 1973 (revised), p.128.
Meer, John Henry van der: Typologie der Sackpfeife. In: Anz. Germ. Nationalmus. (Nürnberg, 1964), p.141.
Podnos, Theodor H.: Bagpipes and tunings. Detroit, 1974, p.30 (»Baines).