Two designs for a cross-section depicting the fortifications of Paris, and another aerial view of the fortifications

French School Two designs for a cross-section depicting the fortifications of Paris, and another aerial view of the fortifications numbered 'Pl 15", 'Pl 16' and 'Pl 17' and all numbered '5' bodycolor and watercolor each approximately 17 x 22¼ inches (43 x 56.5 cm.0 (3)