"Hello, there What in the name of reason is this?" The horseman's excited cry was echoed by a startled neigh from his beast, which wheeled about so suddenly that he nearly precipitated both himself and rider into the gulch below. "Oh I'm sorry--Hold on, Zu Go Do, please. Quick It's so narrow just beyond and I can't--" The stranger obeyed, perforce, for his spirited animal having now headed up the slope, continued on his course at breakneck speed,...