A writer named Richard Madoc took her captive, and as a result was given great ability in writing, but Calliope calls upon the trio of witches known by many names, including the the Furies, the Kindly Ones, and the Gracious Ladies, for help. They direct her to Morpheus, who, was once her lover (this relationship is elaborated on later in the series), and who is currently also imprisoned.
After his own release, he went to rescue Calliope. Madoc, however, complains that without her, he will have no ideas, so Morpheus caused him to never stop having them. Madoc suddenly began to experience an overabundance of ideas. He could not concentrate on any one thing because another idea popped into his head before he had even acknowledged the last.
Finally, Madoc freed the muse. Eventually, Calliope asked Dream to release Madoc from his torment. Dream complied.