A warning appears

Beaoldoric's men, left above to guard the entrance discovered beneath the obelisk, look up in surprise as a fire arrow arcs into the air. It comes from the southwest, beyond the henge, where none of them are stationed. It is followed several moments later by a shouted alarm from the nearest sentry along the rim of the henge. A large group of riders is approaching, fast. With their leader still below, they know they have to hold them off until they are out, but they are badly outnumbered. Still, alerted by the mysterious fire arrow, they have time to prepare.