At the close of this document he administered a telling fillip in his humorous style to that numerous class who seek to control practical affairs by sentiment, and who now would have had their prattle about the "mother country" outweigh the whole accumulation of her very unmaternal oppression and injustice. Concerning the allegation of an unfilial ingratitude, he said: "There is much more reason for retorting that charge on Britain, who not only never contributes any aid, nor affords, by an exclusive commerce, any advantages to Saxony, _her_ mother country; but, no longer since than the last war, without the least provocation, subsidized the king of Prussia while he ravaged that _mother country_, and carried fire and sword into its capital.... An example we hope no provocation will induce us to imitate." Had this declaration ever been used, which it was not, the dignity of the grave general who commanded the American forces would have compelled him to cut off this closing snapper from the lash, amusing as it was. The witty notion had found a more appropriate place in the newspaper article which had dumfounded the guests at the English country house. Commenting upon this, Mr. Parton well says: "Here perhaps we have one of the reasons why Dr. Franklin, who was universally confessed to be the ablest pen in America, was not always asked to write the great documents of the Revolution. He would have put a joke into the Declaration of Independence, if it had fallen to him to write it.... His jokes, the circulating medium of Congress, were as helpful to the cause as Jay's conscience or Adams's fire; ... but they were out of place in formal, exact, and authoritative papers."[37] [Note 37: _Life of Franklin_, ii, 85.] A document which cost Dr. Franklin much more labor than this declaration was a plan for a union of the colonies, which he brought forward July 21, 1775. It was the "first sketch of a plan of confederation which is known to have been presented to Congress." No final action was ever taken upon it. It contained a provision that Ireland, the West India Islands, the Canadian possessions, and Florida might, upon application, be received into the confederation. Franklin's duties in Congress were ample to consume his time and strength; but they were far from being all that he had to do. Almost immediately after his return he was made chairman of a committee for organizing the postal service of the country. In execution of this duty he established in substance that system which has ever since prevailed; and he was then at once appointed postmaster-general, with a salary of L1000 per annum. When franking letters he amused himself by changing the formula, "Free: B. Franklin" into "B. Free, Franklin."