Inscribed at right with computations, in pen and brown ink; at top, "alabastro / marmo / alabastro / porfido // caminoÖ // due compagni // gola // medusa"; at bottom, "B bianco // a porfido // medusa // cigno" cerrula (?)".
Watermark: Fleur-de-lis inside circle, surmounted by V, centered on chain line.
Stampfle, Felice. Giovanni Battista Piranesi, Drawings in the Pierpont Morgan Library. New York : Dover, 1978, no. 92, repr.
Drawing done on verso of portion of a map of northern Italy.
Morgan, Jane Norton, 1868-1925, former owner.
Morgan, Junius Spencer, 1892-1960, former owner.
Morgan, Henry S. (Henry Sturgis), 1900-1982, former owner.