Louisa M. Middleton, A Dictionary of Music and Musicians (1900)
“ Trebelli's appearances in the opera-houses of Germany were a series of brilliant triumphs. Public and critics were alike carried away by enthusiasm when they heard her rendering of the parts of Rosina, Arsace, Orsini, Urbano, Azucena and others. No member of Merelli's Italian troupe was gifted with so brilliant a voice and so much executive power. Nor could the audiences fail to be impressed by the actress's varied powers so rarely at the command of one individual, Trebelli expressing at one time the fire of an almost manly vigour, and at another the charm of womanly tenderness and delicacy. ”
