His family emigrated, and Foli spent much of his youth in Hartford, Connecticut. Originally a carpenter, he studied singing under Bisaccia at Naples and made his first appearance at Catania in 1862. From the Paris Opéra he was engaged by Mapleson for the season of 1865, and made his London debut as St Bris in "Les Huguenots". In the absence of Antonio Giuglini the company toured in late 1865 with Mario as principal tenor in Manchester, Dublin, Belfast and Liverpool. In January–April 1866 Mapleson split the company into two parties for a very extensive British provincial tour, Foli joining the ensemble of Mario, Grisi and Lablache under Arditi.