In 1841 he removed to Laconia, then known the world over as Meredith Bridge, and took charge of the Belknap Hotel. This being the only stage house of that lively place, it was usually inundated with the stream of public travel peculiar to those times. He continued this business about two years, when he opened a bookstore and an apothecary-shop in a building which stood on the site now occupied by the post-office and the national bank. He was soon after appointed postmaster,--in the latter part of Tyler's administration; was re-appointed by President Polk, through whose term he held the office, which he continued to do a short time during the term of President Taylor, when, being a life-long Democrat, he was removed. He was re-appointed by President Pierce, and also by President Buchanan, during whose terms he held the office, which he continued to do a short time under President Lincoln, when he was superseded by the appointment of a Republican. Thus he held the office of postmaster during part of the terms of three Republican, and the full terms of three Democratic administrations, making his term of office about sixteen years in all. The duties of his long term of service were performed in a manner universally acceptable and satisfactory to the public. In 1848 the Boston, Concord, & Montreal Railroad was built and completed from Concord to Plymouth. In anticipation of this event the firm of Charles Ranlet & Co. built large and extensive car-works at Laconia, which they designed particularly for the construction of freight-cars. The firm commenced and carried on the business until the decease of the senior partner, in 1860, when the works were suspended. In 1861, Mr. Moulton became a partner, and by his great energy and business capacity has developed a large business, which employs some two hundred men, most of whom are skilled workmen. The monthly pay-roll is about eight thousand dollars. The works have been repeatedly enlarged, and several extensive buildings erected, to accommodate the increase of business. For several years, passenger-cars of the finest style and finish, as well as freight-cars, have been built at their works, and their annual gross earnings are to be reckoned at several hundred thousand dollars. In February, 1881, these car-shops, with most of their machinery and contents, were burned to the ground, only some of the out-buildings being saved. Before the ruins were done smoking, lumber began to be hauled upon the ground, and in thirty days from the fire cars were being built in new shops which had been erected on the old foundations. Mr. Moulton was then over seventy years of age, and was well able to retire from business, with an ample competence, to the quiet repose which most men desire as the closing blessing of an active and arduous life.