SIR,--I received yours of the 23d inst. by the post. From the style of your first letter, (9th Sept.) in which you required an "immediate answer," I fully expected an immediate interview. As you declined the interview I proposed through Mr. Ingersoll, and left town the next morning, without saying when you proposed returning, and having determined not to "alter or delay" the "small publication," which you "had prepared before the receipt of my first letter,"--I am at a loss to know what could have occasioned your surprise at my departure, before your return from Bucks. After having promised to the public the most satisfactory proofs, that no such conversation as alluded to in the queries ever passed, it was reasonable to allow you some time to prepare your "authentic document." Your last letter (23d Sept) informs that they were not _then_ completed. And could you reasonably expect that I should have remained in town till this is completed? or could you suppose I would suffer your publication, worked up, as it no doubt will be, with all the cunning and misrepresentation you are master of, to pass unanswered? As you have protracted this affair by your _engagement_ to the public, I shall not put it in the power of _accident_ to deprive me of the opportunity of laying the facts I am possessed of open to public view. The question will then be, whether what I have avowed is true? My wealth, judgment, or passions, can have no influence, either way, with impartial men. My own character, the character of others concerned, and all the circumstances combined, will determine the judgment of the public. This business being ended, an interview may reasonably be expected. I am, sir, your humble servant, Gen. Reed, Philadelphia. JOHN CADWALADER. Having for several years given over every expectation of seeing those changes made in the constitution of Pennsylvania, which I have ever thought necessary to secure that happiness and liberty intended by the revolution, I retired, and have never since even expressed my sentiments concerning the politics of this state, except among my particular friends. Your vexatious administration hath furnished an example, to what a dangerous length the authority of government may be carried under such a constitution.