Opus numbers used in uniform titles are Sgambati's own, as printed in de Angelis (1912) and Casella (1925), and cited as first set in New Grove and MGG
His Mélodies poétiques, pour le piano, c1903.
New Grove (Sgambati, Giovanni; b. May 28, 1841, Rome, d. Dec. 14, 1914, Rome; Italian composer, pianist and conductor)