Do I need to introduce Arturo Toscanini (1867-1957), one of the greatest conductors of all times? He actually composed a bit in his youth. In 1882 he had begun to compose in ernest, and had completed more than 30 works before he turned 21. Then, in 1888, he went to that life-changing performance of Tristan und Isolde in Bologna and decided never to compose again. The rest is, as they say, history.
His songs (we have found around 20) are all very much in the italian style, somewhat kitschy, but otherwise fitting perfectly between Mascagni, Catalani and Leoncavallo.