Edwin puts his vest on twice as he prepares to leave Mary's quarters.
Francis was Louis's son-in-law and first cousin once removed, not his nephew.
Mary's relationship with Catherine of Aragon is depicted as frosty. In fact, they were very good friends. Mary strongly disliked Anne Boleyn and opposed Henry's attempt to annul his marriage to Catherine.
Brandon is introduced to Henry after the jousting match. In reality, he was one of Henry's best friends and a member of his inner circle.
Brandon's previous marriages and two daughters are not mentioned.
The story takes place from 1514-1515. Henry banishes Brandon to New Spain, which was established in 1521 after Hernán Cortés conquered the Aztecs and established Mexico City on the site of the Aztec's capital, Tenochtitlan.
Henry had no power to banish Brandon to New Spain (present-day Western and Southwestern United States, Central America, the Caribbean, and northern South America) as it did not belong to England.