The three plaques of ivory here illustrated are already well known to students of such work, but there has been some uncertainty as to the form in which they were originally joined together. One of them, representing the Eagle of the Evangelist St. John, is in the Victoria and Albert Museum,1 for which it was acquired in 1867 from the Webb Collection; the other two, with the Angel of St. Matthew and a half-length figure of Christ, are now in the Museo Nazionale at Ravenna.