Pegasus Early Music begins its 10th concert season with the Brazilian countertenor José Lemos in a concert of Italian music for the virtuoso singer: music of Ferrari, Monteverdi, Merula, Strozzi, and Petrarch’s enchanting sonnet Io Vidi in Terra set by Gagliano. José Lemos, countertenor; Jory Vinikour, harpsichord; Deborah Fox, theorbo and baroque guitar