The celebrated picture from which this was taken, is considered by all connoisseurs, as one of the finest productions of Art. In it, Lionardo is said to have concentrated all his various powers, . . . The original cartoons of the heads are in the possession of Sir Thomas Baring; the crayon drawings, are from a series of engravings belonging to Mr. Johnson. [P. 80.]
Second Exhibition of Pictures in Dalhousie College. Under the Patronage of Lady Sarah Maitland. Halifax, N.S. Printed by J.S. Cunnabell--Argyle-Street. 1831.