Analysis of information sources in references of the Wikipedia article "O sanctissima" in English language version.
Travellers all agree in their account of the effects of the simple air called 'The Virgin's Hymn,' sung in unison by the whole crew of the Sicilian seamen on board their ships when the sun sets, or when it is the twenty-fourth hour of Italy.The editor identified the article's author in his obituary: Reed, Isaac, ed. (October 1799). "William Seward, Esq". European Magazine and London Review. 36 (4): 219–220.
William Seward... amused himself with collecting the materials for what he called Drossiana in the present Magazine; which he began in October 1789, and continued without intermission to the end of his life.