Now every ship's letter bag would contain probably many letters relating to goods aboard the ship, as well as many which were in no way so related. But how was the postmaster to tell the letters accompanying goods from those which did not? Even if the ship's captain assisted to the best of his ability, which was more than doubtful, there would be many letters about which the postmaster could not be certain, and with a L5 penalty for every mistake, his position was not an enviable one. Another clause in the bill of the legislature of Virginia contained a schedule of hours for every courier. The terms of the schedule were so exacting that compliance with it was impossible. The penalty attached to every failure to observe the hours set forth, was twenty shillings for each letter delayed.[42] As the governor pointed out, the difficulties of travel during the winter season, owing to the number of great rivers to be passed, would subject the postmasters to the risk of a fine for every letter they accepted for transmission at that period of the year. The bill of 1718, when sent up for the governor's assent, was promptly vetoed; but on the other hand, the intention of the deputy postmaster general to establish a post office in Virginia was not pressed. It was not until 1732, when the governor had relinquished his office, and had himself been appointed deputy postmaster general, that Virginia was included in the postal system of North America. Even after that date the post office in Virginia was on a somewhat irregular footing, at least in regard to the conveyance of the mails. In a gazetteer published in 1749,[43] it is stated that while regular trips are made by mail courier from Portsmouth to Philadelphia, southward to Williamsburg the courier's movements were uncertain, as he did not set out until there were sufficient letters posted for the south, to guarantee his wages from the postage on them. There was a post office at this period as far south as Charlestown, but the post carriage for that office was still more uncertain. With the exception of the Virginian contretemps, the period from 1710 until after the middle of the eighteenth century was one of quiescence. Deputy postmaster general succeeded deputy postmaster general; and the annals of their administrations carry little that is interesting. After the retirement of Hamilton in 1721, a change was made in the relations between the deputy postmaster general and the general post office, by which the post office in London was relieved of all expense in connection with the maintenance of the North American postal system.