Thomas Wilhelm, A Military Dictionary and Gazetteer
“ If this method, several times repeated, is not successful, unscrew the vent-piece if it be a brass gun; and if an iron one, drill out the spike, or drill a new vent.Artillery can be rendered unserviceable by other methods besides spiking, as follows: (1) Wedge a shot in the bottom of the bore by wrapping it with felt, or by means of iron wedges, using the rammer or a bar of iron to drive them in. (2) Cause shells to burst in the bore of bronze guns. (3) Fire broken shot from them with large charges. ”
