artfirstprimo in a quandry@the Leonardo exhibition again...

On Jan 15th I took my 12th visit to the stupendous Leonardo exhibition (ending 5 Feb) to visit this occasion just four paintings.  These four paintings in the Leonardo exhibition that have exercised the minds of many a Leonardo scholar.  The paintings in question are the newly discovered 'Salvator Mundi', the 'Madonna Lita' from the Hermitage, the 'Madonna of the Yarnwinder' and the 'Lady with the Ermine'. The question is are they all solely the work of Leonardo?  I know what Mr Sewell would think, but what do you think?   think we can never know for certain and perhaps this is part of the mystery of Leonardo.