He closes this letter by saying that he thought of making a tour of America, adding that, "if there ever was an object worth travelling to see, and worthy of the contemplation of a philosopher, it is that in which he may see the beginning of a great empire at its foundation."[61] He communicated this purpose also to John Adams, who answered him, that "he would be received respectfully in every part of America,--that he had always been considered friendly to America,--and that his writings had been useful to our cause."[62] Then came another work, first published in 1783, entitled, "A Memorial addressed to the Sovereigns of America, by Governor Pownall," of which he gave the mistaken judgment to a private friend, that it was "the best thing he ever wrote." Here for the first time American citizens are called "sovereigns." At the beginning he explains and indicates the simplicity with which he addresses them:-- "Having presumed to address to the Sovereigns of Europe a Memorial ... permit me now to address this Memorial to you, Sovereigns of America. I shall not address you with the court titles of Gothic Europe, nor with those of servile Asia. I will neither address your Sublimity or Majesty, your Grace or Holiness, your Eminence or High-mightiness, your Excellence or Honors. What are titles, where things themselves are known and understood? What title did the Republic of Rome take? The state was known to be sovereign and the citizens to be free. What could add to this? Therefore, United States and Citizens of America, I address you as you are."[63]