"Oh?" Roland asked, raising his eyebrows. "Go ahead."
"Since the Taquila devouring worm can tunnel through the mountains of the Impassable Mountain Range, they can also be used to open up a passage under the Barbarian Lands," Edith said, as she held up two fingers. "Two worms working in parallel will be able to create a passage wide enough to allow a wagon to pass through it. I've already asked Minister Karl about it. The result he arrived at is that the unstable structure of the mud lands may make it impossible for us to open up a space that can accommodate an underground palace, like the one in the Third Border Town, but if we go deep enough, we should be able to open up a passable tunnel."
"How do we go about it?"
"The construction work should start within the main camp of the First Army. The entrance to the passage can be a shaft heading underground from the center of the camp, covered by a tent and disguised as an ordinary structure."
