The dromedary is the swift post-camel, which carries its rider on long journeys seventy miles a day on the stretch. A caravan of ordinary camels is like a freight train and is intended to go slowly and surely with its heavy load of merchandise; but a company of dromedary riders is like a limited express. The ordinary caravan travels six hours a day and about three miles an hour, but a good dromedary can perform wonders on the road. A merchant once rode the entire distance from El Kasim to Taif and back, over seven hundred miles in fifteen days; and a post-rider at Maan in North Arabia can deliver a message at Damascus, two hundred miles away, at the end of three days. The ordinary camel is like a packhorse, but the dromedary by careful breeding has become a race-horse. The camel is thick-built, heavy footed, ungainly, jolting. The dromedary has more slender limbs, finer hair, a lighter step, a wonderfully easy pace and is more enduring of thirst. All the camels in Arabia have a single hump. The two-humped camel, which you sometimes see in the circus, does not come from Arabia, but from Central Asia. As for the ordinary camel, his life is as hard as the desert soil and as barren of all comfort as the desert is bare of grass. Surely, no animal would have more right to feel sulky and dull. Always in hard use as a beast of burden, underfed and overloaded in the desert land where even a thorny bush is considered a tit-bit, and where water costs money, it is no fun at all to be a camel.