A few years after the Company had regained possession of York Factory, it built (1718) a wooden fort at Churchill River, to which was given the name of Prince of Wales. In 1730 it constructed another at Moose River; and about the same time a small post, capable of containing eight or ten men at Slude River, on the East Main. In 1720 Henley House, one hundred and fifty miles up Albany River, was built to contain a garrison of eight men, as a check to the Indians who carried on a trade with the French. [Sidenote: Building of stone forts.] But the wooden fort Prince of Wales did not remain long. The remembrance of their former posts destroyed by fire, and Iberville's cannon, caused the Company at length to undertake the fortification on a splendid scale of its best harbour, to safeguard what it designed to be its principal _entrepôt_ from the French, as well as from the Indians. Opposition was cried down, and the "fortification party," as it was called, carried the day. A massive thirty-feet wide foundation was begun at Churchill, from the plans of military engineers who had served under Marlborough, and, after many vicissitudes, in 1734 Fort Prince of Wales, one of the strongest forts on the continent, was reared at the mouth of Churchill River. [Illustration: FORT PRINCE OF WALES.] It was the original intention to have the walls forty-two feet thick at their foundation, but on account of the Governor's interference the dimensions were reduced to twenty-five. It was afterwards found, however, that there was a tendency to sink when cannon were fired frequently from the walls, so one section was forthwith pulled down and rebuilt according to original plans. Three of the bastions had arches for storehouses, forty feet three inches by ten feet, and in the fourth was built a stone magazine twenty-four feet long and ten feet wide in the clear, with a passage to it through the gorge of the bastion twenty-four feet long and four feet wide. The parapets were originally constructed of wood, supplied by denuding the old fort, situated five miles up the Churchill River, the site of which was first occupied in 1688; but in 1746 the Company began erecting a stone parapet. Robson's plan shows that two houses, a dwelling and office building, were erected inside the fort, and incidentally he describes one of the two as being one hundred and eighty-one feet six inches by thirty-three feet, with side walls seventeen feet high and the roof covered with lead.