"At Agincourt" by G. A. Henty is a historical novel written during the late 19th century. The story centers around the backdrop of the long-standing feud between the houses of Orleans and Burgundy in France, particularly focusing on the events leading up to the famous Battle of Agincourt. The narrative seems to highlight characters such as Sir Eustace de Villeroy and his son Guy, who are drawn into this turbulent conflict, navigating themes of loyalty, warfare, and the complexities of medieval life. The opening of the novel introduces us to the tensions brewing in France as Sir Eustace prepares to take his family to their estate across the channel. We meet various characters, including Guy, a young warrior-in-training, who is filled with ambition and eager to prove himself in battle. The narrative provides a rich historical context, outlining the personalities and incidents that contribute to the looming conflict between the opposing factions. As preparations unfold for a potential confrontation with French forces, the stage is set for both internal and external conflicts, establishing an engaging atmosphere steeped in the realities of feudal power struggles and the impending violence of battle. (This is an automatically generated summary.)