However Martin Kemp, professor emeritus of the history of art at Trinity College, Oxford, and one of the world’s foremost experts on the artist, has expressed doubts about whether the painting, which measures 24in by 18in, is the work of Leonardo.
I saw a bad photo of the painting but it didn’t look like Leonardo’s work - especially if it’s compared to the cartoon. But I’m no expert. It is certainly small enough to be his.