Cygnus, son of Apollo, changed into a swan: because his friend Phil(l)ius refused to give him the bull captured by the help of Hercules, Cycnus, the son of Apollo, leaps off a cliff, and is changed into a swan (Ovid, Metamorphoses VII 371)

Cygnus, son of Apollo, changed into a swan: because his friend Phil(l)ius refused to give him the bull captured by the help of Hercules, Cycnus, the son of Apollo, leaps off a cliff, and is changed into a swan (Ovid, Metamorphoses VII 371)