Great abuses grew up round the travelling post, or "thorough post," as it was called.[12] Riders in post frequently failed to pay a reasonable sum for the hire of horses; and since King's messengers, although paying no fixed rates, obtained better accommodation than others, riders in post travelling on their own affairs made no scruple to represent themselves as travelling on public service. Orders directed against these abuses were issued in 1603. Riders in post on the King's affairs, with a special commission signed either by one of the Principal Secretaries of State, by six at least of the Privy Council, or by the Master of the Posts, were to pay at the rate of 2-1/2d. a mile for a horse. All others riding post about their own affairs were to make their own terms with the postmaster, and to pay in advance.[13] The net result was that for all persons riding with the special commission a fixed rate was payable in place of uncertain rates as hitherto, and the postmasters were protected from being imposed upon by persons riding post on their private business. Without the special commission it was useless to pretend to be travelling on the King's affairs. By this proclamation the postmasters were also given the exclusive right of letting horses to travellers.[14] The wages of the postmasters in respect of the "post for the pacquet" were a fixed sum per day, and a certain number of horses had to be kept in readiness, in proportion to the amount of the wages paid. As regards the service for the State, the system of posts was therefore on a complete and definite financial basis. The rates for the thorough post, although not in any way rates of postage in the modern sense, were the first rates applied to the service of the posts (the pay of the postmasters for the packet post being merely wages per diem), and it was to them that the term "postage" was first applied. These rates were in fact the original "postage." The number of regular posts was in early times quite small.[15] In order to provide a means of reaching other parts of the kingdom with some degree of facility, the municipalities were required to maintain, or at least provide when required, post-horses for the use of the King's messengers.[16] Some municipalities made definite provision of horses: Leicester, for example, maintained "certen poste-horses" (four in number) for the service of the Prince; but if horses were not provided voluntarily, the magistrates and constables were authorized to seize them for the King's service wherever they could be found.[17] Many of the posts continued for a long period to be of a temporary nature. Even in the seventeenth century some which it might be thought would have been important at any time, were regarded as extraordinary posts, and were discontinued with the disappearance of the special circumstances on account of which they had been established.[18]