N. B.--_The pictures here described are pictures belonging to Foreign
Schools only. The numerals refer to the numbers on the frames._
_Pictures in the National Gallery to which, because they are deposited
on loan or for other reasons, no numbers are attached, are described at
the end of the Numerical Catalogue._
_References to books in the following pages are, except where otherwise
stated, to the works of Ruskin. Wherever possible, the references to
his books are by sections and paragraphs, instead of by pages, so as to
make them applicable to all the different editions. The references to
Vasari are to Bohn's translation, 5 vols., 1855._