To Zabardas, Duke of Sardinia.
Gregory to Zabardas, etc.
From the letters of my brother and fellow bishop Felix, and of the servant of God, Cyriacus, we have learned your Glory's good qualities. And we give great thanks to mighty God, that Sardinia has got such a duke; one who so knows how to do his duty to the republic in earthly matters as to know also how to exhibit to Almighty God dutiful regard for the heavenly country. For they have written to me that you are arranging terms of peace with the Barbaricini on such conditions as to bring these same Barbaricini to the service of Christ. On this account I rejoice exceedingly, and, should it please Almighty God, will speedily notify your gifts to our most serene princes. Do you, therefore, accomplish what you have begun, show the devotion of your heart to Almighty God, and help to the utmost of your power those whom we have sent to your parts for the conversion of the Barbaricini; knowing that such works may avail much to aid you both before our earthly princes and in the eyes of the heavenly king.
Source: Register of Letters (New Advent)