In January 1774 Finlay was appointed joint "Deputy-General for the Northern District of America" in the room of Dr. Franklin. He was allowed to retain, for the time being, the benefits of the Post Office at Quebec, which, in the words of the letter of appointment, he had been "so instrumental in bringing to a degree of perfection."[106] The disturbances of 1775 in the coast colonies soon affected the post to Canada. In September of that year, the prospect of getting mails through from Canada to New York was so slight that Finlay was anticipating the suspension of all communication with the rest of the world during the whole of the winter, unless letters could be conveyed to Halifax. The couriers were frequently held up by armed men and robbed, and by November matters had become so serious that all postal arrangements in the province were stayed. Quebec was besieged throughout the winter and spring. After its relief Finlay tried to set up the posts again, but unsuccessfully, as the Governor refused to re-establish the monopoly of the _maîtres de poste_, on the ground that travellers in Canada were very well accommodated in horses and conveyances and did not desire its re-establishment. Without it Finlay was unable to maintain a service, and no posts existed during the remaining period of the war. After peace had been restored, Finlay represented the matter so strongly that the monopoly was re-established. The posts were again set up, and Finlay was appointed Deputy Postmaster-General of Canada, Nova Scotia, and New Brunswick. The mails for Canada were still sent by way of New York, as before the war, but for military reasons it was important that a mail route should be established from Halifax, the military headquarters, to run altogether within British territory. In 1787 a fortnightly post (monthly in winter) was accordingly established between Quebec and Halifax.[107] The mail went by River du Loup, near the Grand Portage, where the courier from Quebec handed over his mail to the courier from Fredericton; by the Madawaska to the Grand Falls; thence by boat to Fredericton. A fresh courier went by boat from Fredericton to the mouth of the St. John's River. Here the mail was transferred to a sloop of about 34 tons burthen for conveyance across the Bay of Fundy to Digby, whence the route lay by Annapolis. The total distance from Quebec to Halifax was 633 miles, and the time required for the trip varied from twenty-one to thirty-one days.