"Cantata / Baron d'Astorga". No known printed source. According to the New grove dictionary of music and musicians, ed. Stanley Sadie (Houndmills, Basingstoke, Hampshire: Macmillan, 1980), Astorga's only known published work was "Cantadas humanas ... Cantate da camera" (Lisbon, 1726). This cantata is not in the GB-Lbl copy (K.4.f.11).
No match was found in the British union-catalogue of early music printed before the year 1801, ed. Edith B. Schnapper (London: Butterworth Scientific Publications, 1957); Cyrus Lawrence Day and Eleanore Boswell Murrie, English song-books, 1651-1702: a bibliography (London: Bibliographical Society, 1940); or David Hunter, Opera and song books published in England, 1703-1726: a descriptive bibliography (London: Bibliographical Society, 1997).