 This trip was delayed by urgent modifications to his opera "Mazeppa".Tchaikovsky wrote to Nadezhda von Meck from St. Petersburg on 13 March 1884, "I am feeling a surge of energy, and an impatience to set about something new " But Tchaikovsky did not manage to start any new work in Saint Petersburg.Only after arriving at Kamenka on 12 April did Tchaikovsky set to work.