[ai] Hermitage, Petrograd.

[aj] Boston Museum, U. S. A. See Plate 15.

[ak] As in Dow's The Dentist, Schwerin Mus., and a similar work at the Louvre.

[al] Hermitage, Petrograd.

[am] Bologna Museum.

[an] For example, Rubens's David's Last Song, Frankfort Museum.

[ao] See examples by Ary Scheffer, Luxembourg; and H. Thoma, Burnitz Coll.

[ap] Both at the Louvre.

[aq] The Bargello, Florence.

[ar] As in K. Meyer's picture.