Thirdly, [...]it is not his conclusion that is performed in productions of "Turandot" but only what the premiere conductor Arturo Toscanini included from it... Puccini had worked for nine months on the following concluding duet and at his death had left behind a whole ream of sketches... Alfano had to reconstruct...according to his best assessment...and with his imagination and magnifying glass" since Puccini's material "had not really been legible."