No. 39. Byzantine Interior, Ravenna.

No. 40. 5th Century Mosaic Work in the Baptistery at Ravenna.

From a Drawing by Miss Dora Bard.

means of secret communication; and in the later period when secrecy was no longer necessary, these became a corporate part of the ornament and decoration.

No. 38. Byzantine Panel from the sarcophagus of St. Theodore. St. Appollinare in Classe, Ravenna.