The rollers are labelled: Müller China. Rolls 52, 28, 26, 56, 30, 76, 72 were included in the dem. coll. as nos. 16 - 23. Extensive correspondence is available. A joint lecture by Mueller and Hornbostel took place on 8 June 1919 (cf. Sachs 1918). Transcriptions of some pieces in Hornbostel 1919, 1921 (?), Lachmann 1929a, c and Reinhard 1939, 1956c. Numerous photos available (especially of musical instruments) and published in many publications on Chinese music. Further ethnographica and photos in EM. W. 30 and 72 are published on LP FE 4175.Contents: traditional music, folk music, ceremonial and Buddhist music, theatre music