 After several months in Paris, Cage's enthusiasm for America was revived after he read Walt Whitman's "Leaves of Grass" – he wanted to return immediately, but his parents, with whom he regularly exchanged letters during the entire trip, persuaded him to stay in Europe for a little longer and explore the continent.Cage started traveling, visited various places in France, Germany and Spain, as well as Capri and, most importantly, Majorca, where he started composing.His first compositions were created using dense mathematical formulas, but Cage was displeased with the results and left the finished pieces behind when he left.