About: http://webisa.webdatacommons.org/166324782

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Their compass seems to have been an octave and a half, from C to G, including the mean notes of the female or boy's voice.
http://www.w3.org/ns/prov#wasQuotedFrom	wikisource.org