In 1653 the posts were farmed to Captain Manley at a rent of £10,000 a year; and in 1655, Manley's contract having expired, Cromwell on the advice of his Council placed them in the hands of Mr. Secretary Thurloe, on his giving security to the same amount. The change of management was followed two years later by an important step in advance. This was the passing of an Act of Parliament intituled an Act for settling the postage of England, Scotland, and Ireland. Legislative sanction was now given to what had hitherto rested on no better authority than Proclamation or Order in Council. A general office, to be called the Post Office of England, was to be established for the receipt and despatch of letters; and under the title of Postmaster-General and Comptroller of the Post Office an officer was to be appointed who was to have the exclusive right of carrying letters and of furnishing post-horses. At the Restoration the Act of 1657, the "pretended" Act as it was now called, could not of course be recognised as possessing any legal validity, and so it was replaced by another; but the later Act was little more than a re-enactment of the earlier one. Virtually, it is to the Act of 1657 that the General Post Office owes its origin, although the Act of 1660, as being unimpeachable, has been commonly called its charter. Similar as the two Acts are in the main, there is one important difference between them. The Act of 1657 gives as a reason for making the posts the subject of parliamentary enactment that they are and have been "the best means of discovering and preventing many dangerous and wicked designs which have been and are daily contrived against the peace and welfare of this Commonwealth, the intelligence whereof cannot well be communicated but by letter of escript." To the odious practice here implied no countenance is given in the Act of 1660. But, indeed, it needed not this evidence to prove that during the Commonwealth the Post Office was largely used as an instrument of police. Thurloe's "intercepted" letters are matter of history; and the journals of the two Houses of Parliament shew that the foreign mails, both inward and outward, were stopped for whole weeks together, and committees appointed to open and read the letters. On one occasion the Venetian ambassador, whose letters had shared the same fate as the rest, entered an indignant protest. "He could not persuade himself," he said, "that the Government of England, so noble and generous, should have so inferior a mind as to open the letters of an ambassador, and by this means to violate the laws, and to give an example to the world so damnable, and of so little respect towards the minister of the Serenissima Respublica." Nor was his indignation appeased until four peers had waited upon him in the name of the House of Lords, and tendered an ample apology.