St. Dominic's Christmas Broadsheet, No. 3. Latin text and plainchant notes with woodcut by Philip Hagreen. Merry Christmas from Blackfriars Gallery. The text is the Introit ("Entrance Antiphon") for the Mass During Christmas Day from the Roman liturgy. Based on the prophecy of Isaiah 9:5, the broadside proclaims, "A little child is born to us today, and he will be called the Mighty God, Alleluia!"