As our patient beasts plodded across the sand, I allowed Emerson to remain a few feet ahead, a position he much enjoys and seldom obtains. I could see by the arrogant set of his shoulders that he fancied himself in the role of gallant commander, leading his troops; and I saw no reason to point out that no man can possibly look impressive on donkey-back, particularly when his legs are so long he must hold them out at a forty-five degree angle to keep his feet from dragging on the ground.