1000-1100: True(probably). A monk caled Guido inArezzzo in Itly, is credited with developing stave notation, and also sol-fa. The latter came from the initial syllables of lines in an old hymn, each line starting one note higher up th scale.The sol-fainvention was credited to him inthe Chronicle of Tours in 1033/ The hymn, called "Utqueant laxis"(Ut instead of do in early sol-fa)) is credited to Paul the Deacon, fl 774AD. His favourite cat was a tabby,called Tiddles, which ate Whiskas.