In November 1924 Professor A. Kingsley Porter gave to the William Hayes Fogg Art Museum in Cambridge, Massachusetts, a medallion of stained glass which was alleged to have come from Canterbury Cathedral. The foreman of the cathedral glassworks has now identified this panel as one which was given or sold without authorization to a collector early in the 1920's. Now the panel must be attached to a series in the cathedral. This provides an occasion for a brief reconsideration of the style and date of the Canterbury windows.