BONNET Louis Marin (Paris 1736 1793) - "Plan of a steep castle, occupied by 300 men prepared to defend themselves against an attack from the outset". c.1783. Dotted engraving, printed in colours. Ref: I.F.F XVIIIth, n°122. Proof on laid paper. Plate VI for "Idées d'un militaire pour la disposition des troupes confiées aux jeunes officiers dans la défense et l'attaque des petits postes...", Paris, A. Jombert (impr. De Didot l'aîné), 1783. Copper margins. 25 x 38,5 cm. Condition A (Cut inside the copperplate mark on three sides, trace of old median vertical fold and reembossed at foot).