The Indians were well and kindly treated in France, but all of them died there before Cartier left St.
Malo to return to Canada in 1541.
One advantage he derived from sailing away with these hostages was (no doubt) that they could give him geographical information of importance which materially shortened the return journey.

For the first time he made use of the broad strait between Anticosti Island and Gaspe Peninsula, and, better still, entered the Atlantic, not by the dangerous northern route through the straits of Belle Isle, but by means of Cabot Strait, between Newfoundland and Cape Breton Island.

Of these discoveries he availed himself on his third and last voyage in 1541.
When in that year he once more anchored his ships near Quebec he found the attitude of the Hurons changed.

They enquired about their friends and relations who had been carried off five years before, and although they pretended to be reconciled to their fate when they heard (not altogether truly) that one or two were dead, and the others had become great lords in France and had married French women, they really felt a disappointment so bitter and a hostility so great that Cartier guessed their expressions of welcome to be false.

However, he sent back to France two of the ships under his command and beached the other three, landed his stores, built two forts at Cap Rouge, above and below, and then started off with a few of his men and two boats to revisit the country of Hochelaga.