Scene from the Franco-Spanish siege of Gibraltar in 1782; this sepia engraving (aquatint with etching) shows the floating batteries commanded by Rear-Admiral Bonaventura Moreno, getting into position to begin Gibraltar's defences.
See companion engraving, "Defeat of the floating batteries before Gibraltar on the night on the 13th of Sep.t 1782" filed as P&E L2008F122