Your favor of December the 12th came duly to hand, as did the second letter to Doctor Linn, and the treatise on Phlogiston, for which I pray you to accept my thanks. The copy for Mr. Livingston has been delivered, together with your letter to him, to Mr. Harvie, my secretary, who departs in a day or two for Paris, and will deliver them himself to Mr. Livingston, whose attention to your matter cannot be doubted. I have also to add my thanks to Mr. Priestley, your son, for the copy of your Harmony, which I have gone through with great satisfaction. It is the first I have been able to meet with, which is clear of those long repetitions of the same transaction, as if it were a different one because related with some different circumstances. I rejoice that you have undertaken the task of comparing the moral doctrines of Jesus with those of the ancient Philosophers. You are so much in possession of the whole subject, that you will do it easier and better than any other person living. I think you cannot avoid giving, as preliminary to the comparison, a digest of his moral doctrines, extracted in his own words from the Evangelists, and leaving out every thing relative to his personal history and character. It would be short and precious. With a view to do this for my own satisfaction, I had sent to Philadelphia to get two Testaments (Greek) of the same edition, and two English, with a design to cut out the morsels of morality, and paste them on the leaves of a book, in the manner you describe as having been pursued in forming your Harmony. But I shall now get the thing done by better hands.