DEAR SIR,--It is very true that the denunciations of the priesthood are fulminated against every advocate for a complete freedom of religion. Comminations, I believe, would be plenteously pronounced by even the most liberal of them, against Atheism, Deism, against every man who disbelieved or doubted the resurrection of Jesus, or the miracles of the New Testament. Priestley himself would denounce the man who should deny the Apocalypse, or the Prophecies of Daniel. Priestley and Lindsay both have denounced as idolaters and blasphemers all the Trinitarians, and even the Arians. Poor weak man, when will thy perfection arrive? Thy perfectability I shall not deny; for a greater character than Priestley or Godwin has said, "Be ye perfect," &c. For my part I can not deal damnation round the land on all I judge the foes of God and man. But I did not intend to say a word on this subject in this letter. As much of it as you please hereafter, but let me return to politics. With some difficulty I have hunted up, or down, the "address of the young men of the city of Philadelphia, the district of Southwark, and the Northern Liberties," and the answer. The addresses say, "Actuated by the same principles on which our forefathers achieved their independence, the recent attempts of a foreign power to derogate from the dignity and rights of our country, awaken our liveliest sensibility, and our strongest indignation." Huzza my brave boys! Could Thomas Jefferson or John Adams hear those words with insensibility, and without emotion? These boys afterwards add, "We regard our liberty and independence as the richest portion given us by our ancestors." And who were those ancestors? Among them were Thomas Jefferson and John Adams. And I very coolly believe that no two men among those ancestors did more towards it than those two. Could either hear this like statues? If, one hundred years hence, your letters and mine should see the light, I hope the reader will hunt up this address, and read it all; and remember that we were then engaged, or on the point of engaging, in a war with France. I shall not repeat the answer till we come to the paragraph upon which you criticised to Dr. Priestley, though every word of it is true, and I now rejoice to see it recorded, and though I had wholly forgotten it. The paragraph is, "Science and morals are the great pillars on which this country has been raised to its present population, opulence and prosperity, and these alone can advance, support, and preserve it. Without wishing to damp the ardor of curiosity, or influence the freedom of inquiry, I will hazard a prediction that, after the most industrious and impartial researches, the longest liver of you all will find no principles, institutions, or systems of education more fit, IN GENERAL, to be transmitted to your posterity than those you have received from your ancestors."