To king Baiju Noyan, princes, and barons of the Tartar army: viam cognoscere veritatis.
We have received your messengers and understood what they had to say.
Because of the responsibility placed on us, we look after the salvation of all peoples, so that all rational beings may know their Creator, follow him in faith and deed, and be with him after they die.
So that we may not appear to neglect you, since you live so far away, we have sent messengers to explain the true faith and advise you about salvation.
But since you are not yet Christians and are ignorant, knowing little of the Creator and Jesus Christ; as much as we are troubled, we know that a more serious danger threatens your souls, especially since you have heard about the faith and cannot be excused before God on account of ignorance. Nor ought you be glorified on the grounds of the strength through which, with the Lord permitting, you have conquered many nations.
Better that you humble yourself before Him, face to face, and recognize His forbearance, Who for so long has endured your destructive actions; that in waiting, you may be turned from errors to truth, and be able to fear Him, lest He provoked for too long a time should threaten you, since you do not recognize His omnipotence.
And so we advise you, warn you, and beseech you, at long last, listening to our advice and thinking about the perfection of your soul, leave the ways leading to destruction and approach the right way through which one comes to joy after death.
And that you may make more unencumbered progress towards belief in the Creator of everything, cease at once to exercise the sword of persecution in the slaughter of people, especially Christians. By abstaining from such things, which offend the eyes of God, you will more easily find His grace and mercy.
Lyon, 22 November 1248.