Let sleeping dogs lie.
Take a look around before we go into the tunnel." They reconnoitered, first on one side, then on the other.

No one was in sight.

Harry bent to the ground, and finding a pitchy pine knot, lighted it.

They started cautiously within, blinking against the darkness.
A detour and they avoided an ore car, rusty and half filled, standing on the little track, now sagging on moldy ties.

A moment more of walking and Harry took the lead.
"It's only a step to the shaft now," he cautioned.