This picture is from a 15 century manuscript in the Bibliotheque Nationale, Paris, recording the Henry V's campaign, cited in the source as Blanchetaque where the French presence prevented the English from crossing the Somme and so forced them south, to Agincourt. This is obviously a conflict, but English records do not describe such a 'bloody' encounter at this point.
Note the left handed horsearcher who has a longbow distinctly shown with a black backing.
The picture represents a night/dusk scene.