the painting. On April 27, 1506, an evaluation was made. It was judged that the work was still incomplete. Leonardo was requested to finish it, but he was still absent from Milan. On August 18, 1508, the painting was delivered and put into place. On August 7, 1507, and October 23, 1508, Ambrogio received two payments totalling 200 Lire. The receipt of this payment is acknowledged in correspondence by Leonardo. 1524–2011 National Gallery painting In 1524 and 1576 The Virgin of the Rocks in the Chapel of the Immaculate Conception, presumably the London version, was invoked against the plague. In 1576, the altarpiece was removed from the chapel, which was demolished. In mid-1785, Gavin Hamilton, a Scottish painter and dealer, paid 1,582 Lire to purchase the Virgin of the Rocks from Alessandro, Count Cicogna, administrator of the religious body which succeeded the Confraternity of the Immaculate Conception. Hamilton's heirs sold the painting to Lord Lansdowne, who had amassed considerable debts. After his death in 1805, his son John was forced to sell nearly all of his father's collections, and the painting was purchased by the 15th Earl of Suffolk. In 1880, the painting was sold by the 18th Earl of Suffolk to the National Gallery for 9,000 guineas. It was reported at that time to be in a poor state and was attributed by some critics to Leonardo and by others to Bernardino Luini. In June 2005, the painting was examined by infra-red reflectogram. This imaging revealed a draft of a different painting beneath the visible one. The draft portrays a woman, probably kneeling, with her right hand outstretched and her left on her heart. Some researchers believe that the artist's original intention was to paint an adoration of the infant Jesus. In 2021, Oxia Palus–an artificial intelligence company specialised in the reconstruction of lost artwork–used machine learning techniques to reconstruct this pentimento using the entire oeuvre of Leonardeschi paintings. Many other pentimenti are visible under x-ray or infra-red examination. In 2009/2010 the painting underwent cleaning and conservation work, returning to display in July 2010. The National Gallery, in a preliminary announcement of the results of the work, said that it revealed that the painting was largely, possibly entirely, by Leonardo, and unfinished in parts. The full publication of the findings was released later in 2010. Louvre painting In 1625 the Virgin of the Rocks now in the Louvre was