"Dear departed Brother Dave He chased a bear into a cave" ― Dave's tombstone
Dave is a ghost whose name appears on a tombstone of the Family Plot.
Dave, whose unknown brother or sister outlived him and wrote his epitaph, was apparently a notorious hunter. One day, hunting a bear, he chased him inside a cave, where the bear presumably got the best of him. Since he is in the family plot, he was presumably from the family that owned the Mansion back in the day, likely the Gracey family.
Note I have not printed this.