>>6
これのことでしょ
http://www.gutenberg.org/files/7785/7785-h/7785-h.htm
In that year also, no doubt, was painted the early and, as might be expected, unfinished "St. Jerome in the Desert," now in the Vatican, the under-painting being in umber and _terraverte_. Its authenticity is vouched for not only by the internal evidence of the picture itself, but also by the similarity of treatment seen in a drawing in the Royal Library at Windsor. Cardinal Fesch, a princely collector in Rome in the early part of the nineteenth century, found part of the picture—the torso—being used as a box-cover in a shop in Rome. He long afterwards discovered in a shoemaker's shop a panel of the head which belonged to the torso. The jointed panel was eventually purchased by Pope Pius IX., and added to the Vatican Collection.