Attackers dig a tunnel under a castle wall in order to bring it down. In which order do the steps of that method run?
Dig the tunnel, flood it with water, and wait for the wall above it to sink slowly
Dig the tunnel, come up inside the castle, and open the gate from within
Prop the wall with timber, set the timber alight, and then dig the tunnel
Dig the tunnel, prop the roof with timber, burn the props, and let the wall fall✓Correct answer
Explanation
The props hold up the ground that the wall stands on while the digging goes forward, and firing them removes that support all at once so the masonry above drops into the empty space. Tunnelling in to open a gate fails as a description of this method because the aim there is to get men inside, whereas mining is meant to destroy a stretch of wall from below.