Songs of Innocence and of Experience; Plate 31; 'Introduction' (Bentley 30); Print made by William Blake; 1757-1827; British; 1789 to 1794; Relief etching printed in dark-brown with pen and blue ink; black ink and watercolor on moderately thick; slightly textured; cream wove paper; Sheet: 7 1/8 x 5 inches (18.1 x 12.7 cm); Plate: 4 7/8 x 2 7/8 inches (12.4 x 7.3 cm); and Spine: 7 3/8 inches (18.7 cm); bed; blanket; clouds; literary theme; man; night; nude; pillow; sky; stars; text