This rare artist proof by John Sartain, after Forli, was published by William Young Ottley in Loudon, Sept 1, 1826. It measures 14 x 12 inches and is on medium weight paper. The images for this engraving were part of a paintng in fresco formerly in the Vault of the Church of S.S. Apostoli at Rome; and now preserved in the Palace at Monte-Cavallo. This information is printed on the lower margin with a plate number on the upper margin.