The book is a detailed instructional manual focusing on self-defense. Its primary emphasis is on close-combat techniques using the broadsword and single-stick (a practice weapon). However, it expands significantly beyond these main weapons, dedicating chapters to various other implements that could be used for defense: the quarter-staff (a shorter pole), the bayonet (attached to a rifle), the cudgel (a heavy club), the shillalah (a type of curved stick or short weapon), the walking stick, the umbrella, and other everyday objects. Clarke provides step-by-step instructions, often including diagrams (though we may not have access to the original illustrations), for striking, parrying, fencing, and grappling techniques adapted to each specific weapon or object. The underlying theme is empowering the individual to defend themselves effectively against an attacker using whatever means are immediately at hand.