Third voyage, 1541–1542
The Dauphin Map
of Canada, c. 1543, showing Cartier's discoveries
On October 17, 1540, Francis ordered the navigator Jacques Cartier to return to Canada to lend weight to a colonization project of which he would be "captain general". However, January 15, 1541, saw Cartier supplanted by Jean-François de La Rocque de Roberval, a Huguenot courtier and friend of the king named as the first lieutenant general of French Canada. Roberval was to lead the expedition, with Cartier as his chief navigator. While Roberval waited for artillery and supplies, he gave permission to Cartier to sail on ahead with his ships.
On May 23, 1541, Cartier departed Saint-Malo on his third voyage with five ships. This time, any thought of finding a passage to the Orient was forgotten. The goals were now to find the "Kingdom of Saguenay" and its riches, and to establish a permanent settlement along the St. Lawrence River.
Anchoring at Stadacona, Cartier again met the Iroquoians, but found their "show of joy" and their numbers worrisome, and decided not to build his settlement there. Sailing a few kilometres up-river to a spot he had previously observed, he decided to settle on the site of present-day Cap-Rouge, Quebec. The convicts and other colonists were landed, the cattle that had survived three months aboard ship were turned loose, earth was broken for a kitchen garden, and seeds of cabbage, turnip, and lettuce were planted. A fortified settlement was thus created and was named Charlesbourg-Royal. Another fort was also built on the cliff overlooking the settlement, for added protection.
The men also began collecting what they believed to be diamonds and gold, but which upon return to France were discovered to be merely quartz crystals and iron pyrites, respectively — which gave rise to a French expression: "faux comme les diamants du Canada" ("As false as Canadian diamonds"). Two of the ships were sent on their journey home with some of these minerals on September 2.
Having set tasks for everyone, Cartier left with the longboats for a reconnaissance in search of "Saguenay" on September 7. Having reached Hochelaga, he was prevented by bad weather and the numerous rapids from continuing up to the Ottawa River.
Returning to Charlesbourg-Royal, Cartier found the situation ominous. The Iroquoians no longer made friendly visits or peddled fish and game, but prowled about in a sinister manner. No records exist about the winter of 1541–1542 and the information must be gleaned from the few details provided by returning sailors. It seems the natives attacked and killed about 35 settlers before the Frenchmen could retreat behind their fortifications. Even though scurvy was cured through the native remedy (Thuja occidentalis infusion), the impression left is of a general misery, and of Cartier's growing conviction that he had insufficient manpower either to protect his base or to go in search of the Saguenay Kingdom.
Cartier left for France in early June 1542, encountering Roberval and his ships along the Newfoundland coast, at about the time Roberval marooned Marguerite de La Rocque. Despite Roberval's insistence that he accompany him back to Saguenay, Cartier slipped off under the cover of darkness and continued on to France, still convinced his vessels contained a wealth of gold and diamonds. He arrived there in October, in what proved to be his last voyage. Meanwhile, Roberval took command at Charlesbourg-Royal, but it was abandoned in 1543 after disease, foul weather and hostile natives drove the would-be settlers to despair.