The LaFontaine-Baldwin government remained in office until October, 1851, when it was constitutionally dissolved by the retirement of the prime minister soon after the resignation of his colleague from Upper Canada, whose ability as a statesman and integrity as a man had given such popularity to the cabinet throughout the country. It has been well described by historians as "The Great Ministry." During its existence Canada obtained a full measure of self-government in all provincial affairs. Trade was left perfectly untrammeled by the repeal in June, 1849, of the navigation laws, in accordance with the urgent appeals of the governor-general to the colonial secretary. The immediate results were a stimulus to the whole commerce of the province, and an influx of shipping to the ports of the St. Lawrence. The full control of the post-office was handed over to the Canadian government. This was one of the most popular concessions made to the Canadian people, since it gave them opportunities for cheaper circulation of letters and newspapers, so necessary in a new and sparsely settled country, where the people were separated from each other in many districts by long distances. One of the grievances of the Canadians before the union had been the high postage imposed on letters throughout British North America. The poor settlers were not able to pay the three or four shillings, and even more, demanded for letters mailed from their old homes across the sea, and it was not unusual to find in country post-offices a large accumulation of dead letters, refused on account of the expense. The management of the postal service by imperial officers was in every way most unsatisfactory; it was chiefly carried on for the benefit of a few persons, and not for the convenience or consolation of the many who were always anxious for news of their kin in the "old country." After the union there was a little improvement in the system, but it was not really administered in the interests of the Canadian people until it was finally transferred to the colonial authorities. When this desirable change took place, an impulse was soon given to the dissemination of letters and newspapers. The government organized a post-office department, of which the head was a postmaster-general with a seat in the cabinet. Other important measures made provision for the introduction of the decimal system into the provincial currency, the taking of a census every ten years, the more satisfactory conduct of parliamentary elections and the prevention of corruption, better facilities for the administration of justice in the two provinces, the abolition of primogeniture with respect to real estate in Upper Canada, and the more equitable division of property among the children of an intestate, based on the civil law of French Canada and old France.