Inscription
lower right in graphite: Muirhead Bone; center verso in graphite: Baths of Diocletian / 88 [?] Gray / PORTICO OF ST. PETERS ROME. 28 St Peters, Rome D16753
lower right in graphite: Muirhead Bone; center verso in graphite: Baths of Diocletian / 88 [?] Gray / PORTICO OF ST. PETERS ROME. 28 St Peters, Rome D16753