"The Messenger of the Black Prince" by Thomas A. H. Mawhinney is a historical novel written in the early 20th century. The story is set during the tumultuous times of English and French feudal conflicts, focusing on a young Norman boy named Henri La Mar, who becomes embroiled in intrigue involving the Black Prince of England and the treachery of a cunning antagonist named De Marsac. Throughout the narrative, themes of loyalty, bravery, and honor are explored as Henri navigates through deception and danger. The opening of the book introduces us to Henri, who begins his day at the armorer's shop, where he encounters a mysterious king’s fool who captures his attention with strange antics and cryptic remarks about the ongoing conflict led by the Black Prince. Tension mounts as Henri leaves the armorer's and finds himself in the woods, where he faces an attempted attack from two thugs armed with daggers. His return home reveals a conspiratorial atmosphere, with the old Count of Gramont distressed over the capture of his son, Charles, and plotting a response against the King of France. This tumultuous beginning sets the stage for Henri’s quest, where he and his brother André must confront De Marsac and the lurking dangers in their fight to reclaim honor and rescue their ally. (This is an automatically generated summary.)