Graphite, pen and black ink on moderately thick, slightly textured, white wove paper
Dimensions:
Sheet: 19 1/2 × 14 7/8 inches (49.5 × 37.8 cm)
Inscription(s)/Marks/Lettering:
Inscribed in pen and black ink, lower left: "Quadrifrontal arch, Tripoli"; in graphite, right, calculations given; in pen and black ink, lower left, calculations; inscribed on verso in graphite, upper left: "No 12"
Credit Line:
Yale Center for British Art, Paul Mellon Collection