Margaret Sheridan was an Irish soprano, active in the first half of the 20th century and celebrated for her interpretations of the Italian operatic repertoire, particularly the works of Puccini. Trained in Italy, she made her debut in Rome in 1918, quickly establishing herself on the most important international stages. Her career is inextricably linked to roles such as Cio-Cio-San in *Madama Butterfly*, which earned her the nickname "the Irish Butterfly," Mimì in *La Bohème*, and Manon Lescaut. She performed regularly at the Teatro alla Scala in Milan, often under the direction of Arturo Toscanini, and at the Royal Opera House, Covent Garden in London. Appreciated for her powerful voice, expressive phrasing, and great dramatic talent, she is considered one of the most significant lyric-dramatic sopranos of her era. Her recordings, made primarily for the His Master's Voice label between 1928 and 1930, though not numerous, remain a precious testament to her art and are still the subject of study and admiration.