sapper

Sapper, sap′ėr, n. a soldier employed in the building of fortifications, &c.

Then what was her business with those spies, the Sapper and Nonet?

But while he pauses in doubt, a Sikh sapper calmly springs outside and commences to throw down the pile before his own gun.

As the engineers played such a gallant part in the battle, our first story must be the experiences of a sapper.