The facts and incidents were supplied by Madam Camilla Urso herself at such stray moments of leisure as could be found during a busy concert season at Boston, in the months of January and February, 1874; and the work was done at such spare moments as the writer could find in the midst of journalistic cares. Such events as could be noted in one evening having been written out, they were read aloud before Madam Urso and others, and when brought up to the exact truth in every detail, and fully approved by such persons as were entitled to an opinion, were given to the printer.