Gregori said her first impression was confirmed when she closely studied the colours and light on her hands and face, as well as the folds of the clothing. But there were other important clues: a wax Vatican customs stamp on the canvas that was only used through the 17th century and a handwritten note on the back, noting that the "reclined Magdalene of Caravaggio was in Chiaia" to be delivered to Cardinale Borghese.