Hand colored engraving (book plate). Title: "The Narwhal or Sea Unicorn". Based on a drawing by Fred Cuvier. Mounted on black board. At lower left of engraving: "J. Stewart Delt.". At lower right: "Lizars Sc.". All sides have been trimmed. Ref: This print is plate #XI, fronting pg. 182 (facing pg. 181) in: "Naturalist's Library: Mammalia Vol-VI-Whales." Edinburgh 1837. Printed by W. H.