Night Sentry on the Shoe Ridge

I scrambled up the rubber treads of the blue sneaker I rigged earlier! The view from the tongue was top-notch, but right across from me, a brass house key gleamed under the hallway lamp. It was dangling crooked off the edge of a shallow wooden key dish. A key out of place leaves the perimeter vulnerable! I vaulted down, grabbed the grooved brass blade with both hands, and hauled it across the varnished rim until it slid flush into the center of the bowl. Clink! The entrance is totally locked down.