There is disagreement as to the size of Caravaggio's oeuvre, with counts as low as 40 and as high as 80. In his biography, Caravaggio scholar Alfred Moir writes "The forty-eight colorplates in this book include almost all of the surviving works accepted by every Caravaggio expert as autograph, and even the least demanding would add fewer than a dozen more". One, "The Calling of Saints Peter and Andrew", was in 2006 authenticated and restored; it had been in storage in Hampton Court, mislabeled as a copy. Richard Francis Burton writes of a "picture of St. Rosario (in the museum of the Grand Duke of Tuscany), showing a circle of thirty men "turpiter ligati"" ("lewdly banded"), which is not known to have survived. The rejected version of "Saint Matthew and the Angel", intended for the Contarelli Chapel in San Luigi dei Francesi in Rome, was destroyed during the bombing of Dresden, though black and white photographs of the work exist. In June 2011 it was announced that a previously unknown Caravaggio painting of Saint Augustine dating to about 1600 had been discovered in a private collection in Britain. Called a "significant discovery", the painting had never been published and is thought to have been commissioned by Vincenzo Giustiniani, a patron of the painter in Rome.