In that year of 1866 he was introduced at the Royal Philharmonic Society. Thereafter he appeared regularly as principal basso for Mapleson, with much success in various parts. In 1866 he appeared in a short run of "Il Seraglio" with Thérèse Tietjens, Hans von Rokitansky and Clarice Sinico: and in 1868 he was with Clara Louise Kellogg, Zélia Trebelli, Bettini and Charles Santley in "La Gazza Ladra" (Il Podestà). In 1869, the season in which the Gye and Mapleson resources were combined, Foli was in the opening production of "Norma" with Tietjens, Sinico and Mongini, and in the "Rigoletto" which followed it. He took the role of Daland in the first performance of "The Flying Dutchman" in England in 1870 with Santley as Vanderdecken and Ilma de Murska as Senta. Herman Klein mentions his Bertramo in the 1872 Drury Lane production of "Robert le Diable" with Christine Nilsson, Italo Gardoni, Mongini and de Murska. He was famous for his Sparafucile ("Rigoletto") and Commendatore ("Don Giovanni"), and had a repertoire of some 60 operas.