A scene showing spectators on small boats in the foreground witnessing the launch of the ‘Neptune’ at Portsmouth Harbour. A British flag can be seen at the left of the image. On the right, viewers spectate from the stern of a ship bearing the British blue ensign. The ‘Neptune’ is in the middle ground, coming down the launching ways out of the covered slip on which it was built watched by a large crowd. Further ships lie in the distance. Coloured lithograph.