40. Obverse of Ringstone, Showing Intaglio Double Portraits of Sts Peter and Paul, with a Processional Cross between Them. Sardonyx. (Private Collection, London). 41. Reverse of ringstone in Fig.40, with cameo inscription PAULUS II PONTIFEX MAXIMUS. 42. Cast of intaglio of double portrait of Sts Peter and Paul, inscribed S PE S PA in Lombardic letters. Thirteenth/fourteenth century. (Cades Collection, German Archaeological Institute, Rome). 43. Intaglio portrait of Pope Paul II wearing a triple tiara, inscribed PAOLO VENETO PAPE II ANNO PUBLICATIONIS IUBILEI ROMA, engraved by Giuliano di Scipione. 1471. Cornelian. (Museo degli Argenti, Florence). Figs. 40-43 are illustrated actual size.