In 1910 Harrold joined the roster of singers at both Hammerstein's Manhattan Opera House and Hammerstein's Philadelphia Opera Company; making his debut with both companies in the Spring of 1910 as Canio in Ruggero Leoncavallo's "Pagliacci" with Mario Sammarco as Tonio and Giuseppe Sturani conducting. He sang in one more role with those companies, a triumphant success as the Duke of Mantua in Giuseppe Verdi's "Rigoletto" with Giovanni Polese in the title role and Luisa Tetrazzini as Gilda, before they went bankrupt later that year.