A breezy day and a sunny landscape. An open country to right and left and forward; behind, a wood. In the edge of this wood, facing the open but not venturing into it, long lines of troops halted. The wood is alive with them, and full of confused noises: the occasional rattle of wheels as a battery of artillery goes into position to cover the advance; the hum and murmur of the soldiers talking; a sound of innumerable feet in the dry leaves that strew the interspaces among the trees; hoarse commands of officers. Detached groups of horsemen are well in front-not altogether exposed-many of them intently regarding the crest of a hill a mile away in the direction of the interrupted advance. For this powerful army, moving in battle order through a forest, has met with a formidable obstacle-the open country. The crest of that gentle hill a mile away has a sinister look; it says, Beware! Along it runs a stone wall extending to left and right a great distance. Behind the wall is a hedge; behind the hedge are seen the tops of trees in rather straggling order. Among the trees-what? It is necessary to know.