The war of 1812 had noticeable effects on the postal service. The mails passing between Quebec and Halifax had to be safeguarded against attack on the part of hostile parties from across the border and against privateers, who infested the lower waters of the St. John river and the bay of Fundy. From the time the courier on his way eastward left the shores of the St. Lawrence, he was in danger of surprise. The portage between the St. Lawrence and lake Temiscouata was wild and uninhabited, and it would have been an easy matter for the enemy to waylay the courier if he travelled unprotected. When he reached the St. John river his course lay along the United States border. Indeed a considerable part of his route lay in territory which was afterwards adjudged by the Ashburton treaty to belong to the United States. Heriot facilitated the couriers' journey over the portage by placing twenty-two old soldiers with their families at intervals on the route. They were supplied with arms, ammunition and rations, as the country was so mountainous, sterile and inhospitable, that no man could derive a subsistence from the soil. The couriers on entering the portage were, also, accompanied by an escort of two soldiers, who travelled with them as far as the Madawaska settlement. From that point downwards, the local captains of militia had orders to render all needful assistance and protection to the couriers. At Fredericton an entire change was made in the route. The route had till then followed the course of the St. John river to the city of St. John, from which place the couriers were taken across the bay of Fundy to Annapolis, in a small sloop. In order to avoid the chances of capture on the water stretches or in the bay, the couriers were sent across the country through the centre of the province to Cumberland, as Amherst was then called, and thence on to Halifax. This arrangement left St. John unprovided with connection with either Quebec or Halifax, but it was brought into the scheme by a separate courier who met the couriers on the main route at Sussexvale. The travel on the new route was at first very bad, but the lieutenant governors of the two Maritime provinces, who were interested in the success of the scheme, promised to do their best to induce their assemblies to put the roads in good condition. In changing the route from Fredericton to Halifax, and requiring the couriers to travel inland, instead of along the waterways, the deputy postmaster general was taking a measure in the direction of safety, but those who had a particular interest in the transmission of their correspondence intact could not look without concern at the exposure of the mails on the long stretch between the foot of lake Temiscouata and Fredericton.