The geography matches.

The Second Source: André Thevet And His Account

Another early source for the story is André Thevet, a French cosmographer who wrote about Marguerite de la Rocque in his works on New France.

Thevet traveled to the Americas and met various people involved in the French colonial enterprise, and he claimed to have spoken with Marguerite herself.

Thevet’s account is generally considered less reliable than the Heptaméron version — he was known for embellishment and for creative reconstruction of events he had not directly witnessed — but it contains some specific details that are not found in the queen of Navarre’s tale, including Marguerite’s name and some geographical information about where she was left.

A third significant source is the work of François de Belleforest, who included a version of the story in his Histoires tragiques (1572).